Remove deprecated QGL* classes

Removes QGL paths in sub-attaq and chip examples.

The boxes example depended on QGL and has been removed.

The corresponding module and test directories for the opengl module are now
empty, but has been left there so we can move the QOpenGL* classes there.

[ChangeLog][QtOpenGL] The deprecated QGL* classes have been removed.

Fixes: QTBUG-74408
Change-Id: I52f56409af8f6901359462a7ba162103d051fe3d
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

45 files changed, 0 insertions, 4841 deletions

diff --git a/examples/widgets/animation/sub-attaq/mainwindow.cpp b/examples/widgets/animation/sub-attaq/mainwindow.cpp
index f9617a22eb..0c152c9180 100644
--- a/examples/widgets/animation/sub-attaq/mainwindow.cpp
+++ b/examples/widgets/animation/sub-attaq/mainwindow.cpp
@@ -59,10 +59,6 @@
 #include <QMenuBar>
 #include <QLayout>
 
-#ifndef QT_NO_OPENGL
-# include <QtOpenGL>
-#endif
-
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
 {
@@ -84,14 +80,5 @@ MainWindow::MainWindow(QWidget *parent)
     view = new QGraphicsView(scene, this);
     view->setAlignment(Qt::AlignLeft | Qt::AlignTop);
     scene->setupScene(newAction, quitAction);
-#ifndef QT_NO_OPENGL
-    QGLWidget *glWidget = new QGLWidget(QGLFormat(QGL::SampleBuffers));
-    if (glWidget->context()->isValid()) {
-        view->setViewport(glWidget);
-    } else {
-        qWarning("Unable to create an Open GL context with sample buffers, not using Open GL.");
-        delete glWidget;
-    }
-#endif
     setCentralWidget(view);
 }
diff --git a/examples/widgets/animation/sub-attaq/sub-attaq.pro b/examples/widgets/animation/sub-attaq/sub-attaq.pro
index ac79fd4249..ea44253fa1 100644
--- a/examples/widgets/animation/sub-attaq/sub-attaq.pro
+++ b/examples/widgets/animation/sub-attaq/sub-attaq.pro
@@ -1,5 +1,4 @@
 QT += widgets
-qtHaveModule(opengl): QT += opengl
 HEADERS += boat.h \
     bomb.h \
     mainwindow.h \
diff --git a/examples/widgets/graphicsview/boxes/3rdparty/fbm.c b/examples/widgets/graphicsview/boxes/3rdparty/fbm.c
deleted file mode 100644
index 3eebaabfba..0000000000
--- a/examples/widgets/graphicsview/boxes/3rdparty/fbm.c
+++ /dev/null
@@ -1,207 +0,0 @@
-/*****************************************************************
-
-  Implementation of the fractional Brownian motion algorithm. These
-  functions were originally the work of F. Kenton Musgrave.
-  For documentation of the different functions please refer to the
-  book: 
-  "Texturing and modeling: a procedural approach"
-  by David S. Ebert et. al.
-
-******************************************************************/
-
-#if defined (_MSC_VER)
-#include <qglobal.h>
-#endif
-
-#include <time.h>
-#include <stdlib.h>
-#include "fbm.h"
-
-#if defined(Q_CC_MSVC)
-#pragma warning(disable:4244)
-#endif
-
-/* Definitions used by the noise2() functions */
-
-//#define B 0x100
-//#define BM 0xff
-#define B 0x20
-#define BM 0x1f
-
-#define N 0x1000
-#define NP 12   /* 2^N */
-#define NM 0xfff
-
-static int   p[B + B + 2];
-static float g3[B + B + 2][3];
-static float g2[B + B + 2][2];
-static float g1[B + B + 2];
-static int   start = 1;
-
-static void init(void);
-
-#define s_curve(t) ( t * t * (3. - 2. * t) )
-
-#define lerp(t, a, b) ( a + t * (b - a) )
-
-#define setup(i,b0,b1,r0,r1)\
-	t = vec[i] + N;\
-	b0 = ((int)t) & BM;\
-	b1 = (b0+1) & BM;\
-	r0 = t - (int)t;\
-	r1 = r0 - 1.;
-#define at3(rx,ry,rz) ( rx * q[0] + ry * q[1] + rz * q[2] )
-
-/* Fractional Brownian Motion function */
-
-double fBm( Vector point, double H, double lacunarity, double octaves,
-	    int init )
-{
-
-    double            value, frequency, remainder;
-    int               i;
-    static double     exponent_array[10];
-    float             vec[3];
-
-    /* precompute and store spectral weights */
-    if ( init ) {
-	start = 1;
-	srand( time(0) );
-	/* seize required memory for exponent_array */
-	frequency = 1.0;
-	for (i=0; i<=octaves; i++) {
-	    /* compute weight for each frequency */
-	    exponent_array[i] = pow( frequency, -H );
-	    frequency *= lacunarity;
-	}
-    }
-
-    value = 0.0;            /* initialize vars to proper values */
-    frequency = 1.0;
-    vec[0]=point.x;
-    vec[1]=point.y;
-    vec[2]=point.z;
-
-
-    /* inner loop of spectral construction */
-    for (i=0; i<octaves; i++) {
-	/* value += noise3( vec ) * exponent_array[i];*/
-	value += noise3( vec ) * exponent_array[i];
-	vec[0] *= lacunarity;
-	vec[1] *= lacunarity;
-	vec[2] *= lacunarity;
-    } /* for */
-
-    remainder = octaves - (int)octaves;
-    if ( remainder )      /* add in ``octaves''  remainder */
-	/* ``i''  and spatial freq. are preset in loop above */
-	value += remainder * noise3( vec ) * exponent_array[i];
-
-    return( value );
-
-} /* fBm() */
-
-
-float noise3(float vec[3])
-{
-    int bx0, bx1, by0, by1, bz0, bz1, b00, b10, b01, b11;
-    float rx0, rx1, ry0, ry1, rz0, rz1, *q, sy, sz, a, b, c, d, t, u, v;
-    int i, j;
-
-    if (start) {
-	start = 0;
-	init();
-    }
-
-    setup(0, bx0,bx1, rx0,rx1);
-    setup(1, by0,by1, ry0,ry1);
-    setup(2, bz0,bz1, rz0,rz1);
-
-    i = p[ bx0 ];
-    j = p[ bx1 ];
-
-    b00 = p[ i + by0 ];
-    b10 = p[ j + by0 ];
-    b01 = p[ i + by1 ];
-    b11 = p[ j + by1 ];
-
-    t  = s_curve(rx0);
-    sy = s_curve(ry0);
-    sz = s_curve(rz0);
-
-
-    q = g3[ b00 + bz0 ] ; u = at3(rx0,ry0,rz0);
-    q = g3[ b10 + bz0 ] ; v = at3(rx1,ry0,rz0);
-    a = lerp(t, u, v);
-
-    q = g3[ b01 + bz0 ] ; u = at3(rx0,ry1,rz0);
-    q = g3[ b11 + bz0 ] ; v = at3(rx1,ry1,rz0);
-    b = lerp(t, u, v);
-
-    c = lerp(sy, a, b);
-
-    q = g3[ b00 + bz1 ] ; u = at3(rx0,ry0,rz1);
-    q = g3[ b10 + bz1 ] ; v = at3(rx1,ry0,rz1);
-    a = lerp(t, u, v);
-
-    q = g3[ b01 + bz1 ] ; u = at3(rx0,ry1,rz1);
-    q = g3[ b11 + bz1 ] ; v = at3(rx1,ry1,rz1);
-    b = lerp(t, u, v);
-
-    d = lerp(sy, a, b);
-
-    return lerp(sz, c, d);
-}
-
-static void normalize2(float v[2])
-{
-    float s;
-
-    s = sqrt(v[0] * v[0] + v[1] * v[1]);
-    v[0] = v[0] / s;
-    v[1] = v[1] / s;
-}
-
-static void normalize3(float v[3])
-{
-    float s;
-
-    s = sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
-    v[0] = v[0] / s;
-    v[1] = v[1] / s;
-    v[2] = v[2] / s;
-}
-
-static void init(void)
-{
-    int i, j, k;
-    
-    for (i = 0 ; i < B ; i++) {
-	p[i] = i;
-
-	g1[i] = (float)((rand() % (B + B)) - B) / B;
-
-	for (j = 0 ; j < 2 ; j++)
-	    g2[i][j] = (float)((rand() % (B + B)) - B) / B;
-	normalize2(g2[i]);
-
-	for (j = 0 ; j < 3 ; j++)
-	    g3[i][j] = (float)((rand() % (B + B)) - B) / B;
-	normalize3(g3[i]);
-    }
-
-    while (--i) {
-	k = p[i];
-	p[i] = p[j = rand() % B];
-	p[j] = k;
-    }
-
-    for (i = 0 ; i < B + 2 ; i++) {
-	p[B + i] = p[i];
-	g1[B + i] = g1[i];
-	for (j = 0 ; j < 2 ; j++)
-	    g2[B + i][j] = g2[i][j];
-	for (j = 0 ; j < 3 ; j++)
-	    g3[B + i][j] = g3[i][j];
-    }
-}
diff --git a/examples/widgets/graphicsview/boxes/3rdparty/fbm.h b/examples/widgets/graphicsview/boxes/3rdparty/fbm.h
deleted file mode 100644
index b8a4a99ae4..0000000000
--- a/examples/widgets/graphicsview/boxes/3rdparty/fbm.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*****************************************************************
-
-  Prototypes for the fractional Brownian motion algorithm. These
-  functions were originally the work of F. Kenton Musgrave.  For
-  documentation of the different functions please refer to the book:
-  "Texturing and modeling: a procedural approach"
-  by David S. Ebert et. al.
-  
-******************************************************************/
-
-#ifndef _fbm_h
-#define _fbm_h
-
-#include  <math.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-//#define TRUE    1
-//#define FALSE   0
-
-typedef struct {
-    double x;
-    double y;
-    double z;
-} Vector;
-    
-float noise3(float vec[]);
-double fBm( Vector point, double H, double lacunarity, double octaves, 
-	    int init );
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-
-
-
-
diff --git a/examples/widgets/graphicsview/boxes/basic.fsh b/examples/widgets/graphicsview/boxes/basic.fsh
deleted file mode 100644
index 327daeef54..0000000000
--- a/examples/widgets/graphicsview/boxes/basic.fsh
+++ /dev/null
@@ -1,82 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-uniform vec4 basicColor;
-
-void main()
-{
-    vec3 N = normalize(normal);
-    // assume directional light
-
-    gl_MaterialParameters M = gl_FrontMaterial;
-
-    float NdotL = dot(N, lightDirection.xyz);
-    float RdotL = dot(reflect(normalize(position), N), lightDirection.xyz);
-
-    vec3 absN = abs(gl_TexCoord[1].xyz);
-    vec3 texCoord;
-    if (absN.x > absN.y && absN.x > absN.z)
-        texCoord = gl_TexCoord[1].yzx;
-    else if (absN.y > absN.z)
-        texCoord = gl_TexCoord[1].zxy;
-    else
-        texCoord = gl_TexCoord[1].xyz;
-    texCoord.y *= -sign(texCoord.z);
-    texCoord += 0.5;
-
-    vec4 texColor = texture2D(tex, texCoord.xy);
-    vec4 unlitColor = gl_Color * mix(basicColor, vec4(texColor.xyz, 1.0), texColor.w);
-    gl_FragColor = (ambient + diffuse * max(NdotL, 0.0)) * unlitColor +
-                    M.specular * specular * pow(max(RdotL, 0.0), M.shininess);
-}
diff --git a/examples/widgets/graphicsview/boxes/basic.vsh b/examples/widgets/graphicsview/boxes/basic.vsh
deleted file mode 100644
index 454e0bd903..0000000000
--- a/examples/widgets/graphicsview/boxes/basic.vsh
+++ /dev/null
@@ -1,70 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform mat4 view;
-
-void main()
-{	
-    gl_TexCoord[0] = gl_MultiTexCoord0;
-    gl_TexCoord[1] = gl_Vertex;
-    specular = gl_LightSource[0].specular;
-    ambient = gl_LightSource[0].ambient;
-    diffuse = gl_LightSource[0].diffuse;
-    lightDirection = view * gl_LightSource[0].position;
-
-    normal = gl_NormalMatrix * gl_Normal;
-    position = (gl_ModelViewMatrix * gl_Vertex).xyz;
-
-    gl_FrontColor = gl_Color;
-    gl_Position = ftransform();
-}
diff --git a/examples/widgets/graphicsview/boxes/boxes.pro b/examples/widgets/graphicsview/boxes/boxes.pro
deleted file mode 100644
index 601edd6883..0000000000
--- a/examples/widgets/graphicsview/boxes/boxes.pro
+++ /dev/null
@@ -1,27 +0,0 @@
-QT += opengl widgets
-requires(qtConfig(combobox))
-
-qtConfig(opengles.|angle|dynamicgl): error("This example requires Qt to be configured with -opengl desktop")
-
-HEADERS += 3rdparty/fbm.h \
-           glbuffers.h \
-           glextensions.h \
-           gltrianglemesh.h \
-           qtbox.h \
-           roundedbox.h \
-           scene.h \
-           trackball.h
-SOURCES += 3rdparty/fbm.c \
-           glbuffers.cpp \
-           glextensions.cpp \
-           main.cpp \
-           qtbox.cpp \
-           roundedbox.cpp \
-           scene.cpp \
-           trackball.cpp
-
-RESOURCES += boxes.qrc
-
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/graphicsview/boxes
-INSTALLS += target
diff --git a/examples/widgets/graphicsview/boxes/boxes.qrc b/examples/widgets/graphicsview/boxes/boxes.qrc
deleted file mode 100644
index d27506dc5a..0000000000
--- a/examples/widgets/graphicsview/boxes/boxes.qrc
+++ /dev/null
@@ -1,25 +0,0 @@
-<!DOCTYPE RCC><RCC version="1.0">
-<qresource prefix="/res/boxes">
-    <file>cubemap_negx.jpg</file>
-    <file>cubemap_negy.jpg</file>
-    <file>cubemap_negz.jpg</file>
-    <file>cubemap_posx.jpg</file>
-    <file>cubemap_posy.jpg</file>
-    <file>cubemap_posz.jpg</file>
-    <file>square.jpg</file>
-    <file>basic.vsh</file>
-    <file>basic.fsh</file>
-    <file>dotted.fsh</file>
-    <file>fresnel.fsh</file>
-    <file>glass.fsh</file>
-    <file>granite.fsh</file>
-    <file>marble.fsh</file>
-    <file>reflection.fsh</file>
-    <file>refraction.fsh</file>
-    <file>wood.fsh</file>
-    <file>parameters.par</file>
-    <file>qt-logo.png</file>
-    <file>smiley.png</file>
-    <file>qt-logo.jpg</file>
-</qresource>
-</RCC>
diff --git a/examples/widgets/graphicsview/boxes/cubemap_negx.jpg b/examples/widgets/graphicsview/boxes/cubemap_negx.jpg
deleted file mode 100644
index 07c282eab9..0000000000
--- a/examples/widgets/graphicsview/boxes/cubemap_negx.jpg
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/cubemap_negy.jpg b/examples/widgets/graphicsview/boxes/cubemap_negy.jpg
deleted file mode 100644
index 46cd2f9cf3..0000000000
--- a/examples/widgets/graphicsview/boxes/cubemap_negy.jpg
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/cubemap_negz.jpg b/examples/widgets/graphicsview/boxes/cubemap_negz.jpg
deleted file mode 100644
index 40c01ddff3..0000000000
--- a/examples/widgets/graphicsview/boxes/cubemap_negz.jpg
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/cubemap_posx.jpg b/examples/widgets/graphicsview/boxes/cubemap_posx.jpg
deleted file mode 100644
index 0b42e8a1b1..0000000000
--- a/examples/widgets/graphicsview/boxes/cubemap_posx.jpg
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/cubemap_posy.jpg b/examples/widgets/graphicsview/boxes/cubemap_posy.jpg
deleted file mode 100644
index 2aca9b1e98..0000000000
--- a/examples/widgets/graphicsview/boxes/cubemap_posy.jpg
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/cubemap_posz.jpg b/examples/widgets/graphicsview/boxes/cubemap_posz.jpg
deleted file mode 100644
index 2e49173848..0000000000
--- a/examples/widgets/graphicsview/boxes/cubemap_posz.jpg
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/dotted.fsh b/examples/widgets/graphicsview/boxes/dotted.fsh
deleted file mode 100644
index 5cbf590e21..0000000000
--- a/examples/widgets/graphicsview/boxes/dotted.fsh
+++ /dev/null
@@ -1,75 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-
-void main()
-{
-    vec3 N = normalize(normal);
-
-    gl_MaterialParameters M = gl_FrontMaterial;
-
-    // assume directional light
-    float NdotL = dot(N, lightDirection.xyz);
-    float RdotL = dot(reflect(normalize(position), N), lightDirection.xyz);
-
-    float r1 = length(fract(7.0 * gl_TexCoord[1].xyz) - 0.5);
-    float r2 = length(fract(5.0 * gl_TexCoord[1].xyz + 0.2) - 0.5);
-    float r3 = length(fract(11.0 * gl_TexCoord[1].xyz + 0.7) - 0.5);
-    vec4 rs = vec4(r1, r2, r3, 0.0);
-
-    vec4 unlitColor = gl_Color * (0.8 - clamp(10.0 * (0.4 - rs), 0.0, 0.2));
-    unlitColor.w = 1.0;
-    gl_FragColor = (ambient + diffuse * max(NdotL, 0.0)) * unlitColor +
-                    M.specular * specular * pow(max(RdotL, 0.0), M.shininess);
-}
diff --git a/examples/widgets/graphicsview/boxes/fresnel.fsh b/examples/widgets/graphicsview/boxes/fresnel.fsh
deleted file mode 100644
index 6758ad5770..0000000000
--- a/examples/widgets/graphicsview/boxes/fresnel.fsh
+++ /dev/null
@@ -1,88 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-uniform samplerCube env;
-uniform mat4 view;
-uniform vec4 basicColor;
-
-void main()
-{
-    vec3 N = normalize(normal);
-    // assume directional light
-
-    gl_MaterialParameters M = gl_FrontMaterial;
-
-    float NdotL = dot(N, lightDirection.xyz);
-    float RdotL = dot(reflect(normalize(position), N), lightDirection.xyz);
-
-    vec3 absN = abs(gl_TexCoord[1].xyz);
-    vec3 texCoord;
-    if (absN.x > absN.y && absN.x > absN.z)
-        texCoord = gl_TexCoord[1].yzx;
-    else if (absN.y > absN.z)
-        texCoord = gl_TexCoord[1].zxy;
-    else
-        texCoord = gl_TexCoord[1].xyz;
-    texCoord.y *= -sign(texCoord.z);
-    texCoord += 0.5;
-
-    vec4 texColor = texture2D(tex, texCoord.xy);
-    vec4 unlitColor = gl_Color * mix(basicColor, vec4(texColor.xyz, 1.0), texColor.w);
-    vec4 litColor = (ambient + diffuse * max(NdotL, 0.0)) * unlitColor +
-                     M.specular * specular * pow(max(RdotL, 0.0), M.shininess);
-
-    vec3 R = 2.0 * dot(-position, N) * N + position;
-    vec4 reflectedColor = textureCube(env, R * mat3(view[0].xyz, view[1].xyz, view[2].xyz));
-    gl_FragColor = mix(litColor, reflectedColor, 0.2 + 0.8 * pow(1.0 + dot(N, normalize(position)), 2.0));
-}
diff --git a/examples/widgets/graphicsview/boxes/glass.fsh b/examples/widgets/graphicsview/boxes/glass.fsh
deleted file mode 100644
index 528d04e4d3..0000000000
--- a/examples/widgets/graphicsview/boxes/glass.fsh
+++ /dev/null
@@ -1,85 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-uniform samplerCube env;
-uniform mat4 view;
-
-// Some arbitrary values
-// Arrays don't work here on glsl < 120, apparently.
-//const float coeffs[6] = float[6](1.0/4.0, 1.0/4.1, 1.0/4.2, 1.0/4.3, 1.0/4.4, 1.0/4.5);
-float coeffs(int i)
-{
-	return 1.0 / (3.0 + 0.1 * float(i));
-}
-
-void main()
-{
-    vec3 N = normalize(normal);
-    vec3 I = -normalize(position);
-    mat3 V = mat3(view[0].xyz, view[1].xyz, view[2].xyz);
-    float IdotN = dot(I, N);
-    float scales[6];
-    vec3 C[6];
-    for (int i = 0; i < 6; ++i) {
-        scales[i] = (IdotN - sqrt(1.0 - coeffs(i) + coeffs(i) * (IdotN * IdotN)));
-        C[i] = textureCube(env, (-I + coeffs(i) * N) * V).xyz;
-    }
-    vec4 refractedColor = 0.25 * vec4(C[5].x + 2.0*C[0].x + C[1].x, C[1].y + 2.0*C[2].y + C[3].y,
-                          C[3].z + 2.0*C[4].z + C[5].z, 4.0);
-
-    vec3 R = 2.0 * dot(-position, N) * N + position;
-    vec4 reflectedColor = textureCube(env, R * V);
-
-    gl_FragColor = mix(refractedColor, reflectedColor, 0.4 + 0.6 * pow(1.0 - IdotN, 2.0));
-}
diff --git a/examples/widgets/graphicsview/boxes/glbuffers.cpp b/examples/widgets/graphicsview/boxes/glbuffers.cpp
deleted file mode 100644
index 91de336af3..0000000000
--- a/examples/widgets/graphicsview/boxes/glbuffers.cpp
+++ /dev/null
@@ -1,406 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "glbuffers.h"
-
-void qgluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
-{
-    const GLdouble ymax = zNear * tan(qDegreesToRadians(fovy) / 2.0);
-    const GLdouble ymin = -ymax;
-    const GLdouble xmin = ymin * aspect;
-    const GLdouble xmax = ymax * aspect;
-    glFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
-}
-
-//============================================================================//
-//                                  GLTexture                                 //
-//============================================================================//
-
-GLTexture::GLTexture()
-{
-    glGenTextures(1, &m_texture);
-}
-
-GLTexture::~GLTexture()
-{
-    glDeleteTextures(1, &m_texture);
-}
-
-//============================================================================//
-//                                 GLTexture2D                                //
-//============================================================================//
-
-GLTexture2D::GLTexture2D(int width, int height)
-{
-    glBindTexture(GL_TEXTURE_2D, m_texture);
-    glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0,
-        GL_BGRA, GL_UNSIGNED_BYTE, nullptr);
-
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-    //glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
-    glBindTexture(GL_TEXTURE_2D, 0);
-}
-
-
-GLTexture2D::GLTexture2D(const QString &fileName, int width, int height)
-{
-    // TODO: Add error handling.
-    QImage image(fileName);
-
-    if (image.isNull()) {
-        m_failed = true;
-        return;
-    }
-
-    image = image.convertToFormat(QImage::Format_ARGB32);
-
-    //qDebug() << "Image size:" << image.width() << "x" << image.height();
-    if (width <= 0)
-        width = image.width();
-    if (height <= 0)
-        height = image.height();
-    if (width != image.width() || height != image.height())
-        image = image.scaled(width, height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
-
-    glBindTexture(GL_TEXTURE_2D, m_texture);
-
-    // Works on x86, so probably works on all little-endian systems.
-    // Does it work on big-endian systems?
-    glTexImage2D(GL_TEXTURE_2D, 0, 4, image.width(), image.height(), 0,
-        GL_BGRA, GL_UNSIGNED_BYTE, image.bits());
-
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-    //glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
-    glBindTexture(GL_TEXTURE_2D, 0);
-}
-
-void GLTexture2D::load(int width, int height, QRgb *data)
-{
-    glBindTexture(GL_TEXTURE_2D, m_texture);
-    glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0,
-        GL_BGRA, GL_UNSIGNED_BYTE, data);
-    glBindTexture(GL_TEXTURE_2D, 0);
-}
-
-void GLTexture2D::bind()
-{
-    glBindTexture(GL_TEXTURE_2D, m_texture);
-    glEnable(GL_TEXTURE_2D);
-}
-
-void GLTexture2D::unbind()
-{
-    glBindTexture(GL_TEXTURE_2D, 0);
-    glDisable(GL_TEXTURE_2D);
-}
-
-
-//============================================================================//
-//                                 GLTexture3D                                //
-//============================================================================//
-
-GLTexture3D::GLTexture3D(int width, int height, int depth)
-{
-    GLBUFFERS_ASSERT_OPENGL("GLTexture3D::GLTexture3D", glTexImage3D, return)
-
-    glBindTexture(GL_TEXTURE_3D, m_texture);
-    glTexImage3D(GL_TEXTURE_3D, 0, 4, width, height, depth, 0,
-        GL_BGRA, GL_UNSIGNED_BYTE, nullptr);
-
-    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_REPEAT);
-    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_REPEAT);
-    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    //glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-    //glTexParameteri(GL_TEXTURE_3D, GL_GENERATE_MIPMAP, GL_TRUE);
-    glBindTexture(GL_TEXTURE_3D, 0);
-}
-
-void GLTexture3D::load(int width, int height, int depth, QRgb *data)
-{
-    GLBUFFERS_ASSERT_OPENGL("GLTexture3D::load", glTexImage3D, return)
-
-    glBindTexture(GL_TEXTURE_3D, m_texture);
-    glTexImage3D(GL_TEXTURE_3D, 0, 4, width, height, depth, 0,
-        GL_BGRA, GL_UNSIGNED_BYTE, data);
-    glBindTexture(GL_TEXTURE_3D, 0);
-}
-
-void GLTexture3D::bind()
-{
-    glBindTexture(GL_TEXTURE_3D, m_texture);
-    glEnable(GL_TEXTURE_3D);
-}
-
-void GLTexture3D::unbind()
-{
-    glBindTexture(GL_TEXTURE_3D, 0);
-    glDisable(GL_TEXTURE_3D);
-}
-
-//============================================================================//
-//                                GLTextureCube                               //
-//============================================================================//
-
-GLTextureCube::GLTextureCube(int size)
-{
-    glBindTexture(GL_TEXTURE_CUBE_MAP, m_texture);
-
-    for (int i = 0; i < 6; ++i)
-        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, 4, size, size, 0,
-            GL_BGRA, GL_UNSIGNED_BYTE, nullptr);
-
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    //glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-    //glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_GENERATE_MIPMAP, GL_TRUE);
-    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
-}
-
-GLTextureCube::GLTextureCube(const QStringList &fileNames, int size)
-{
-    // TODO: Add error handling.
-
-    glBindTexture(GL_TEXTURE_CUBE_MAP, m_texture);
-
-    int index = 0;
-    for (const QString &file : fileNames) {
-        QImage image(file);
-        if (image.isNull()) {
-            m_failed = true;
-            break;
-        }
-
-        image = image.convertToFormat(QImage::Format_ARGB32);
-
-        //qDebug() << "Image size:" << image.width() << "x" << image.height();
-        if (size <= 0)
-            size = image.width();
-        if (size != image.width() || size != image.height())
-            image = image.scaled(size, size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
-
-        // Works on x86, so probably works on all little-endian systems.
-        // Does it work on big-endian systems?
-        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + index, 0, 4, image.width(), image.height(), 0,
-            GL_BGRA, GL_UNSIGNED_BYTE, image.bits());
-
-        if (++index == 6)
-            break;
-    }
-
-    // Clear remaining faces.
-    while (index < 6) {
-        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + index, 0, 4, size, size, 0,
-            GL_BGRA, GL_UNSIGNED_BYTE, nullptr);
-        ++index;
-    }
-
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    //glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-    //glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_GENERATE_MIPMAP, GL_TRUE);
-    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
-}
-
-void GLTextureCube::load(int size, int face, QRgb *data)
-{
-    glBindTexture(GL_TEXTURE_CUBE_MAP, m_texture);
-        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, 0, 4, size, size, 0,
-            GL_BGRA, GL_UNSIGNED_BYTE, data);
-    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
-}
-
-void GLTextureCube::bind()
-{
-    glBindTexture(GL_TEXTURE_CUBE_MAP, m_texture);
-    glEnable(GL_TEXTURE_CUBE_MAP);
-}
-
-void GLTextureCube::unbind()
-{
-    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
-    glDisable(GL_TEXTURE_CUBE_MAP);
-}
-
-//============================================================================//
-//                            GLFrameBufferObject                             //
-//============================================================================//
-
-GLFrameBufferObject::GLFrameBufferObject(int width, int height)
-    : m_width(width)
-    , m_height(height)
-{
-    GLBUFFERS_ASSERT_OPENGL("GLFrameBufferObject::GLFrameBufferObject",
-        glGenFramebuffersEXT && glGenRenderbuffersEXT && glBindRenderbufferEXT && glRenderbufferStorageEXT, return)
-
-    // TODO: share depth buffers of same size
-    glGenFramebuffersEXT(1, &m_fbo);
-    //glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fbo);
-    glGenRenderbuffersEXT(1, &m_depthBuffer);
-    glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, m_depthBuffer);
-    glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, m_width, m_height);
-    //glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, m_depthBuffer);
-    //glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
-}
-
-GLFrameBufferObject::~GLFrameBufferObject()
-{
-    GLBUFFERS_ASSERT_OPENGL("GLFrameBufferObject::~GLFrameBufferObject",
-        glDeleteFramebuffersEXT && glDeleteRenderbuffersEXT, return)
-
-    glDeleteFramebuffersEXT(1, &m_fbo);
-    glDeleteRenderbuffersEXT(1, &m_depthBuffer);
-}
-
-void GLFrameBufferObject::setAsRenderTarget(bool state)
-{
-    GLBUFFERS_ASSERT_OPENGL("GLFrameBufferObject::setAsRenderTarget", glBindFramebufferEXT, return)
-
-    if (state) {
-        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fbo);
-        glPushAttrib(GL_VIEWPORT_BIT);
-        glViewport(0, 0, m_width, m_height);
-    } else {
-        glPopAttrib();
-        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
-    }
-}
-
-bool GLFrameBufferObject::isComplete()
-{
-    GLBUFFERS_ASSERT_OPENGL("GLFrameBufferObject::isComplete", glCheckFramebufferStatusEXT, return false)
-
-    return GL_FRAMEBUFFER_COMPLETE_EXT == glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
-}
-
-//============================================================================//
-//                             GLRenderTargetCube                             //
-//============================================================================//
-
-GLRenderTargetCube::GLRenderTargetCube(int size)
-    : GLTextureCube(size)
-    , m_fbo(size, size)
-{
-}
-
-void GLRenderTargetCube::begin(int face)
-{
-    GLBUFFERS_ASSERT_OPENGL("GLRenderTargetCube::begin",
-        glFramebufferTexture2DEXT && glFramebufferRenderbufferEXT, return)
-
-    m_fbo.setAsRenderTarget(true);
-    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
-        GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, m_texture, 0);
-    glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, m_fbo.m_depthBuffer);
-}
-
-void GLRenderTargetCube::end()
-{
-    m_fbo.setAsRenderTarget(false);
-}
-
-void GLRenderTargetCube::getViewMatrix(QMatrix4x4& mat, int face)
-{
-    if (face < 0 || face >= 6) {
-        qWarning("GLRenderTargetCube::getViewMatrix: 'face' must be in the range [0, 6). (face == %d)", face);
-        return;
-    }
-
-    static constexpr int perm[6][3] = {
-        {2, 1, 0},
-        {2, 1, 0},
-        {0, 2, 1},
-        {0, 2, 1},
-        {0, 1, 2},
-        {0, 1, 2},
-    };
-
-    static constexpr float signs[6][3] = {
-        {-1.0f, -1.0f, -1.0f},
-        {+1.0f, -1.0f, +1.0f},
-        {+1.0f, +1.0f, -1.0f},
-        {+1.0f, -1.0f, +1.0f},
-        {+1.0f, -1.0f, -1.0f},
-        {-1.0f, -1.0f, +1.0f},
-    };
-
-    mat.fill(0.0f);
-    for (int i = 0; i < 3; ++i)
-        mat(i, perm[face][i]) = signs[face][i];
-    mat(3, 3) = 1.0f;
-}
-
-void GLRenderTargetCube::getProjectionMatrix(QMatrix4x4& mat, float nearZ, float farZ)
-{
-    static const QMatrix4x4 reference(
-            1.0f, 0.0f, 0.0f, 0.0f,
-            0.0f, 1.0f, 0.0f, 0.0f,
-            0.0f, 0.0f, 0.0f, 0.0f,
-            0.0f, 0.0f, -1.0f, 0.0f);
-
-    mat = reference;
-    mat(2, 2) = (nearZ+farZ)/(nearZ-farZ);
-    mat(2, 3) = 2.0f*nearZ*farZ/(nearZ-farZ);
-}
diff --git a/examples/widgets/graphicsview/boxes/glbuffers.h b/examples/widgets/graphicsview/boxes/glbuffers.h
deleted file mode 100644
index 4318e8ac24..0000000000
--- a/examples/widgets/graphicsview/boxes/glbuffers.h
+++ /dev/null
@@ -1,372 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef GLBUFFERS_H
-#define GLBUFFERS_H
-
-//#include <GL/glew.h>
-#include "glextensions.h"
-
-#include <QtWidgets>
-#include <QtOpenGL>
-
-#define BUFFER_OFFSET(i) ((char*)0 + (i))
-#define SIZE_OF_MEMBER(cls, member) sizeof(static_cast<cls *>(nullptr)->member)
-
-#define GLBUFFERS_ASSERT_OPENGL(prefix, assertion, returnStatement)                         \
-if (m_failed || !(assertion)) {                                                             \
-    if (!m_failed) qCritical(prefix ": The necessary OpenGL functions are not available."); \
-    m_failed = true;                                                                        \
-    returnStatement;                                                                        \
-}
-
-void qgluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar);
-
-QT_BEGIN_NAMESPACE
-class QMatrix4x4;
-QT_END_NAMESPACE
-
-class GLTexture
-{
-public:
-    GLTexture();
-    virtual ~GLTexture();
-    virtual void bind() = 0;
-    virtual void unbind() = 0;
-    virtual bool failed() const {return m_failed;}
-protected:
-    GLuint m_texture = 0;
-    bool m_failed = false;
-};
-
-class GLFrameBufferObject
-{
-public:
-    friend class GLRenderTargetCube;
-    // friend class GLRenderTarget2D;
-
-    GLFrameBufferObject(int width, int height);
-    virtual ~GLFrameBufferObject();
-    bool isComplete();
-    virtual bool failed() const {return m_failed;}
-protected:
-    void setAsRenderTarget(bool state = true);
-    GLuint m_fbo = 0;
-    GLuint m_depthBuffer = 0;
-    int m_width, m_height;
-    bool m_failed = false;
-};
-
-class GLTexture2D : public GLTexture
-{
-public:
-    GLTexture2D(int width, int height);
-    explicit GLTexture2D(const QString &fileName, int width = 0, int height = 0);
-    void load(int width, int height, QRgb *data);
-    void bind() override;
-    void unbind() override;
-};
-
-class GLTexture3D : public GLTexture
-{
-public:
-    GLTexture3D(int width, int height, int depth);
-    // TODO: Implement function below
-    //GLTexture3D(const QString& fileName, int width = 0, int height = 0);
-    void load(int width, int height, int depth, QRgb *data);
-    void bind() override;
-    void unbind() override;
-};
-
-class GLTextureCube : public GLTexture
-{
-public:
-    GLTextureCube(int size);
-    explicit GLTextureCube(const QStringList &fileNames, int size = 0);
-    void load(int size, int face, QRgb *data);
-    void bind() override;
-    void unbind() override;
-};
-
-// TODO: Define and implement class below
-//class GLRenderTarget2D : public GLTexture2D
-
-class GLRenderTargetCube : public GLTextureCube
-{
-public:
-    GLRenderTargetCube(int size);
-    // begin rendering to one of the cube's faces. 0 <= face < 6
-    void begin(int face);
-    // end rendering
-    void end();
-    bool failed() const override { return m_failed || m_fbo.failed(); }
-
-    static void getViewMatrix(QMatrix4x4& mat, int face);
-    static void getProjectionMatrix(QMatrix4x4& mat, float nearZ, float farZ);
-private:
-    GLFrameBufferObject m_fbo;
-};
-
-struct VertexDescription
-{
-    enum
-    {
-        Null = 0, // Terminates a VertexDescription array
-        Position,
-        TexCoord,
-        Normal,
-        Color,
-    };
-    int field; // Position, TexCoord, Normal, Color
-    int type; // GL_FLOAT, GL_UNSIGNED_BYTE
-    int count; // number of elements
-    int offset; // field's offset into vertex struct
-    int index; // 0 (unused at the moment)
-};
-
-// Implementation of interleaved buffers.
-// 'T' is a struct which must include a null-terminated static array
-// 'VertexDescription* description'.
-// Example:
-/*
-struct Vertex
-{
-    GLfloat position[3];
-    GLfloat texCoord[2];
-    GLfloat normal[3];
-    GLbyte color[4];
-    static VertexDescription description[];
-};
-
-VertexDescription Vertex::description[] = {
-    {VertexDescription::Position, GL_FLOAT, SIZE_OF_MEMBER(Vertex, position) / sizeof(GLfloat), offsetof(Vertex, position), 0},
-    {VertexDescription::TexCoord, GL_FLOAT, SIZE_OF_MEMBER(Vertex, texCoord) / sizeof(GLfloat), offsetof(Vertex, texCoord), 0},
-    {VertexDescription::Normal, GL_FLOAT, SIZE_OF_MEMBER(Vertex, normal) / sizeof(GLfloat), offsetof(Vertex, normal), 0},
-    {VertexDescription::Color, GL_BYTE, SIZE_OF_MEMBER(Vertex, color) / sizeof(GLbyte), offsetof(Vertex, color), 0},
-    {VertexDescription::Null, 0, 0, 0, 0},
-};
-*/
-template<class T>
-class GLVertexBuffer
-{
-public:
-    GLVertexBuffer(int length, const T *data = nullptr, int mode = GL_STATIC_DRAW)
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::GLVertexBuffer", glGenBuffers && glBindBuffer && glBufferData, return)
-
-        glGenBuffers(1, &m_buffer);
-        glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
-        glBufferData(GL_ARRAY_BUFFER, (m_length = length) * sizeof(T), data, mode);
-    }
-
-    ~GLVertexBuffer()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::~GLVertexBuffer", glDeleteBuffers, return)
-
-        glDeleteBuffers(1, &m_buffer);
-    }
-
-    void bind()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::bind", glBindBuffer, return)
-
-        glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
-        for (VertexDescription *desc = T::description; desc->field != VertexDescription::Null; ++desc) {
-            switch (desc->field) {
-            case VertexDescription::Position:
-                glVertexPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
-                glEnableClientState(GL_VERTEX_ARRAY);
-                break;
-            case VertexDescription::TexCoord:
-                glTexCoordPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
-                glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-                break;
-            case VertexDescription::Normal:
-                glNormalPointer(desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
-                glEnableClientState(GL_NORMAL_ARRAY);
-                break;
-            case VertexDescription::Color:
-                glColorPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
-                glEnableClientState(GL_COLOR_ARRAY);
-                break;
-            default:
-                break;
-            }
-        }
-    }
-
-    void unbind()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::unbind", glBindBuffer, return)
-
-        glBindBuffer(GL_ARRAY_BUFFER, 0);
-        for (VertexDescription *desc = T::description; desc->field != VertexDescription::Null; ++desc) {
-            switch (desc->field) {
-            case VertexDescription::Position:
-                glDisableClientState(GL_VERTEX_ARRAY);
-                break;
-            case VertexDescription::TexCoord:
-                glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-                break;
-            case VertexDescription::Normal:
-                glDisableClientState(GL_NORMAL_ARRAY);
-                break;
-            case VertexDescription::Color:
-                glDisableClientState(GL_COLOR_ARRAY);
-                break;
-            default:
-                break;
-            }
-        }
-    }
-
-    int length() const {return m_length;}
-
-    T *lock()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::lock", glBindBuffer && glMapBuffer, return nullptr)
-
-        glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
-        //glBufferData(GL_ARRAY_BUFFER, m_length, NULL, m_mode);
-        GLvoid* buffer = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
-        m_failed = (buffer == nullptr);
-        return reinterpret_cast<T *>(buffer);
-    }
-
-    void unlock()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::unlock", glBindBuffer && glUnmapBuffer, return)
-
-        glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
-        glUnmapBuffer(GL_ARRAY_BUFFER);
-    }
-
-    bool failed()
-    {
-        return m_failed;
-    }
-
-private:
-    int m_length = 0;
-    int m_mode = 0;
-    GLuint m_buffer = 0;
-    bool m_failed = false;
-};
-
-template<class T>
-class GLIndexBuffer
-{
-public:
-    GLIndexBuffer(int length, const T *data = nullptr, int mode = GL_STATIC_DRAW)
-        : m_length(0)
-        , m_mode(mode)
-        , m_buffer(0)
-        , m_failed(false)
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::GLIndexBuffer", glGenBuffers && glBindBuffer && glBufferData, return)
-
-        glGenBuffers(1, &m_buffer);
-        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
-        glBufferData(GL_ELEMENT_ARRAY_BUFFER, (m_length = length) * sizeof(T), data, mode);
-    }
-
-    ~GLIndexBuffer()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::~GLIndexBuffer", glDeleteBuffers, return)
-
-        glDeleteBuffers(1, &m_buffer);
-    }
-
-    void bind()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::bind", glBindBuffer, return)
-
-        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
-    }
-
-    void unbind()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::unbind", glBindBuffer, return)
-
-        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
-    }
-
-    int length() const {return m_length;}
-
-    T *lock()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::lock", glBindBuffer && glMapBuffer, return nullptr)
-
-        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
-        GLvoid* buffer = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_READ_WRITE);
-        m_failed = (buffer == nullptr);
-        return reinterpret_cast<T *>(buffer);
-    }
-
-    void unlock()
-    {
-        GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::unlock", glBindBuffer && glUnmapBuffer, return)
-
-        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
-        glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
-    }
-
-    bool failed()
-    {
-        return m_failed;
-    }
-
-private:
-    int m_length, m_mode;
-    GLuint m_buffer;
-    bool m_failed;
-};
-
-#endif
diff --git a/examples/widgets/graphicsview/boxes/glextensions.cpp b/examples/widgets/graphicsview/boxes/glextensions.cpp
deleted file mode 100644
index ac89911046..0000000000
--- a/examples/widgets/graphicsview/boxes/glextensions.cpp
+++ /dev/null
@@ -1,107 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "glextensions.h"
-
-#define RESOLVE_GL_FUNC(f) ok &= bool((f = (_gl##f) context->getProcAddress(QLatin1String("gl" #f))));
-
-bool GLExtensionFunctions::resolve(const QGLContext *context)
-{
-    bool ok = true;
-
-    RESOLVE_GL_FUNC(GenFramebuffersEXT)
-    RESOLVE_GL_FUNC(GenRenderbuffersEXT)
-    RESOLVE_GL_FUNC(BindRenderbufferEXT)
-    RESOLVE_GL_FUNC(RenderbufferStorageEXT)
-    RESOLVE_GL_FUNC(DeleteFramebuffersEXT)
-    RESOLVE_GL_FUNC(DeleteRenderbuffersEXT)
-    RESOLVE_GL_FUNC(BindFramebufferEXT)
-    RESOLVE_GL_FUNC(FramebufferTexture2DEXT)
-    RESOLVE_GL_FUNC(FramebufferRenderbufferEXT)
-    RESOLVE_GL_FUNC(CheckFramebufferStatusEXT)
-
-    RESOLVE_GL_FUNC(ActiveTexture)
-    RESOLVE_GL_FUNC(TexImage3D)
-
-    RESOLVE_GL_FUNC(GenBuffers)
-    RESOLVE_GL_FUNC(BindBuffer)
-    RESOLVE_GL_FUNC(BufferData)
-    RESOLVE_GL_FUNC(DeleteBuffers)
-    RESOLVE_GL_FUNC(MapBuffer)
-    RESOLVE_GL_FUNC(UnmapBuffer)
-
-    return ok;
-}
-
-bool GLExtensionFunctions::fboSupported() {
-    return GenFramebuffersEXT
-            && GenRenderbuffersEXT
-            && BindRenderbufferEXT
-            && RenderbufferStorageEXT
-            && DeleteFramebuffersEXT
-            && DeleteRenderbuffersEXT
-            && BindFramebufferEXT
-            && FramebufferTexture2DEXT
-            && FramebufferRenderbufferEXT
-            && CheckFramebufferStatusEXT;
-}
-
-bool GLExtensionFunctions::openGL15Supported() {
-    return ActiveTexture
-            && TexImage3D
-            && GenBuffers
-            && BindBuffer
-            && BufferData
-            && DeleteBuffers
-            && MapBuffer
-            && UnmapBuffer;
-}
-
-#undef RESOLVE_GL_FUNC
diff --git a/examples/widgets/graphicsview/boxes/glextensions.h b/examples/widgets/graphicsview/boxes/glextensions.h
deleted file mode 100644
index 685700d866..0000000000
--- a/examples/widgets/graphicsview/boxes/glextensions.h
+++ /dev/null
@@ -1,204 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef GLEXTENSIONS_H
-#define GLEXTENSIONS_H
-
-#include <QtOpenGL>
-
-/*
-Functions resolved:
-
-glGenFramebuffersEXT
-glGenRenderbuffersEXT
-glBindRenderbufferEXT
-glRenderbufferStorageEXT
-glDeleteFramebuffersEXT
-glDeleteRenderbuffersEXT
-glBindFramebufferEXT
-glFramebufferTexture2DEXT
-glFramebufferRenderbufferEXT
-glCheckFramebufferStatusEXT
-
-glActiveTexture
-glTexImage3D
-
-glGenBuffers
-glBindBuffer
-glBufferData
-glDeleteBuffers
-glMapBuffer
-glUnmapBuffer
-*/
-
-#ifndef APIENTRY
-# define APIENTRY
-#endif
-#ifndef APIENTRYP
-# define APIENTRYP APIENTRY *
-#endif
-
-#ifndef GL_VERSION_1_2
-#define GL_TEXTURE_3D 0x806F
-#define GL_TEXTURE_WRAP_R 0x8072
-#define GL_CLAMP_TO_EDGE 0x812F
-#define GL_BGRA 0x80E1
-#endif
-
-#ifndef GL_VERSION_1_3
-#define GL_TEXTURE0 0x84C0
-#define GL_TEXTURE1 0x84C1
-#define GL_TEXTURE2 0x84C2
-#define GL_TEXTURE_CUBE_MAP 0x8513
-#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515
-//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516
-//#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517
-//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518
-//#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519
-//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A
-#endif
-
-#ifndef GL_ARB_vertex_buffer_object
-typedef ptrdiff_t GLsizeiptrARB;
-#endif
-
-#ifndef GL_VERSION_1_5
-#define GL_ARRAY_BUFFER 0x8892
-#define GL_ELEMENT_ARRAY_BUFFER 0x8893
-#define GL_READ_WRITE 0x88BA
-#define GL_STATIC_DRAW 0x88E4
-#endif
-
-#ifndef GL_EXT_framebuffer_object
-#define GL_RENDERBUFFER_EXT 0x8D41
-#define GL_FRAMEBUFFER_EXT 0x8D40
-#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
-#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
-#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
-#endif
-
-typedef void (APIENTRY *_glGenFramebuffersEXT) (GLsizei, GLuint *);
-typedef void (APIENTRY *_glGenRenderbuffersEXT) (GLsizei, GLuint *);
-typedef void (APIENTRY *_glBindRenderbufferEXT) (GLenum, GLuint);
-typedef void (APIENTRY *_glRenderbufferStorageEXT) (GLenum, GLenum, GLsizei, GLsizei);
-typedef void (APIENTRY *_glDeleteFramebuffersEXT) (GLsizei, const GLuint*);
-typedef void (APIENTRY *_glDeleteRenderbuffersEXT) (GLsizei, const GLuint*);
-typedef void (APIENTRY *_glBindFramebufferEXT) (GLenum, GLuint);
-typedef void (APIENTRY *_glFramebufferTexture2DEXT) (GLenum, GLenum, GLenum, GLuint, GLint);
-typedef void (APIENTRY *_glFramebufferRenderbufferEXT) (GLenum, GLenum, GLenum, GLuint);
-typedef GLenum (APIENTRY *_glCheckFramebufferStatusEXT) (GLenum);
-
-typedef void (APIENTRY *_glActiveTexture) (GLenum);
-typedef void (APIENTRY *_glTexImage3D) (GLenum, GLint, GLenum, GLsizei, GLsizei, GLsizei, GLint, GLenum, GLenum, const GLvoid *);
-
-typedef void (APIENTRY *_glGenBuffers) (GLsizei, GLuint *);
-typedef void (APIENTRY *_glBindBuffer) (GLenum, GLuint);
-typedef void (APIENTRY *_glBufferData) (GLenum, GLsizeiptrARB, const GLvoid *, GLenum);
-typedef void (APIENTRY *_glDeleteBuffers) (GLsizei, const GLuint *);
-typedef void *(APIENTRY *_glMapBuffer) (GLenum, GLenum);
-typedef GLboolean (APIENTRY *_glUnmapBuffer) (GLenum);
-
-struct GLExtensionFunctions
-{
-    bool resolve(const QGLContext *context);
-
-    bool fboSupported();
-    bool openGL15Supported(); // the rest: multi-texture, 3D-texture, vertex buffer objects
-
-    _glGenFramebuffersEXT GenFramebuffersEXT;
-    _glGenRenderbuffersEXT GenRenderbuffersEXT;
-    _glBindRenderbufferEXT BindRenderbufferEXT;
-    _glRenderbufferStorageEXT RenderbufferStorageEXT;
-    _glDeleteFramebuffersEXT DeleteFramebuffersEXT;
-    _glDeleteRenderbuffersEXT DeleteRenderbuffersEXT;
-    _glBindFramebufferEXT BindFramebufferEXT;
-    _glFramebufferTexture2DEXT FramebufferTexture2DEXT;
-    _glFramebufferRenderbufferEXT FramebufferRenderbufferEXT;
-    _glCheckFramebufferStatusEXT CheckFramebufferStatusEXT;
-
-    _glActiveTexture ActiveTexture;
-    _glTexImage3D TexImage3D;
-
-    _glGenBuffers GenBuffers;
-    _glBindBuffer BindBuffer;
-    _glBufferData BufferData;
-    _glDeleteBuffers DeleteBuffers;
-    _glMapBuffer MapBuffer;
-    _glUnmapBuffer UnmapBuffer;
-};
-
-inline GLExtensionFunctions &getGLExtensionFunctions()
-{
-    static GLExtensionFunctions funcs;
-    return funcs;
-}
-
-#define glGenFramebuffersEXT getGLExtensionFunctions().GenFramebuffersEXT
-#define glGenRenderbuffersEXT getGLExtensionFunctions().GenRenderbuffersEXT
-#define glBindRenderbufferEXT getGLExtensionFunctions().BindRenderbufferEXT
-#define glRenderbufferStorageEXT getGLExtensionFunctions().RenderbufferStorageEXT
-#define glDeleteFramebuffersEXT getGLExtensionFunctions().DeleteFramebuffersEXT
-#define glDeleteRenderbuffersEXT getGLExtensionFunctions().DeleteRenderbuffersEXT
-#define glBindFramebufferEXT getGLExtensionFunctions().BindFramebufferEXT
-#define glFramebufferTexture2DEXT getGLExtensionFunctions().FramebufferTexture2DEXT
-#define glFramebufferRenderbufferEXT getGLExtensionFunctions().FramebufferRenderbufferEXT
-#define glCheckFramebufferStatusEXT getGLExtensionFunctions().CheckFramebufferStatusEXT
-
-#define glActiveTexture getGLExtensionFunctions().ActiveTexture
-#define glTexImage3D getGLExtensionFunctions().TexImage3D
-
-#define glGenBuffers getGLExtensionFunctions().GenBuffers
-#define glBindBuffer getGLExtensionFunctions().BindBuffer
-#define glBufferData getGLExtensionFunctions().BufferData
-#define glDeleteBuffers getGLExtensionFunctions().DeleteBuffers
-#define glMapBuffer getGLExtensionFunctions().MapBuffer
-#define glUnmapBuffer getGLExtensionFunctions().UnmapBuffer
-
-#endif
diff --git a/examples/widgets/graphicsview/boxes/gltrianglemesh.h b/examples/widgets/graphicsview/boxes/gltrianglemesh.h
deleted file mode 100644
index e5c4f51514..0000000000
--- a/examples/widgets/graphicsview/boxes/gltrianglemesh.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef GLTRIANGLEMESH_H
-#define GLTRIANGLEMESH_H
-
-#include "glbuffers.h"
-#include "glextensions.h"
-
-#include <QtWidgets>
-#include <QtOpenGL>
-
-
-template<class TVertex, class TIndex>
-class GLTriangleMesh
-{
-public:
-    GLTriangleMesh(int vertexCount, int indexCount) : m_vb(vertexCount), m_ib(indexCount)
-    {
-    }
-
-    virtual ~GLTriangleMesh()
-    {
-    }
-
-    virtual void draw()
-    {
-        if (failed())
-            return;
-
-        int type = GL_UNSIGNED_INT;
-        if (sizeof(TIndex) == sizeof(char)) type = GL_UNSIGNED_BYTE;
-        if (sizeof(TIndex) == sizeof(short)) type = GL_UNSIGNED_SHORT;
-
-        m_vb.bind();
-        m_ib.bind();
-        glDrawElements(GL_TRIANGLES, m_ib.length(), type, BUFFER_OFFSET(0));
-        m_vb.unbind();
-        m_ib.unbind();
-    }
-
-    bool failed()
-    {
-        return m_vb.failed() || m_ib.failed();
-    }
-protected:
-    GLVertexBuffer<TVertex> m_vb;
-    GLIndexBuffer<TIndex> m_ib;
-};
-
-
-#endif
diff --git a/examples/widgets/graphicsview/boxes/granite.fsh b/examples/widgets/graphicsview/boxes/granite.fsh
deleted file mode 100644
index 5dcde5d2b1..0000000000
--- a/examples/widgets/graphicsview/boxes/granite.fsh
+++ /dev/null
@@ -1,85 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-uniform sampler3D noise;
-
-//const vec4 graniteColors[3] = {vec4(0.0, 0.0, 0.0, 1), vec4(0.30, 0.15, 0.10, 1), vec4(0.80, 0.70, 0.75, 1)};
-uniform vec4 graniteColors[3];
-
-float steep(float x)
-{
-    return clamp(5.0 * x - 2.0, 0.0, 1.0);
-}
-
-void main()
-{
-    vec2 turbulence = vec2(0, 0);
-    float scale = 1.0;
-    for (int i = 0; i < 4; ++i) {
-        turbulence += scale * (texture3D(noise, gl_TexCoord[1].xyz / scale).xy - 0.5);
-        scale *= 0.5;
-    }
-
-    vec3 N = normalize(normal);
-    // assume directional light
-
-    gl_MaterialParameters M = gl_FrontMaterial;
-
-    float NdotL = dot(N, lightDirection.xyz);
-    float RdotL = dot(reflect(normalize(position), N), lightDirection.xyz);
-
-    vec4 unlitColor = mix(graniteColors[1], mix(graniteColors[0], graniteColors[2], steep(0.5 + turbulence.y)), 4.0 * abs(turbulence.x));
-    gl_FragColor = (ambient + diffuse * max(NdotL, 0.0)) * unlitColor +
-                    M.specular * specular * pow(max(RdotL, 0.0), M.shininess);
-}
diff --git a/examples/widgets/graphicsview/boxes/main.cpp b/examples/widgets/graphicsview/boxes/main.cpp
deleted file mode 100644
index 2b3e6d3389..0000000000
--- a/examples/widgets/graphicsview/boxes/main.cpp
+++ /dev/null
@@ -1,157 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "glextensions.h"
-#include "scene.h"
-
-#include <QGLWidget>
-#include <QtWidgets>
-
-class GraphicsView : public QGraphicsView
-{
-public:
-    GraphicsView()
-    {
-        setWindowTitle(tr("Boxes"));
-        setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
-        //setRenderHints(QPainter::SmoothPixmapTransform);
-    }
-
-protected:
-    void resizeEvent(QResizeEvent *event) override {
-        if (scene())
-            scene()->setSceneRect(QRect(QPoint(0, 0), event->size()));
-        QGraphicsView::resizeEvent(event);
-    }
-};
-
-inline bool matchString(const char *extensionString, const char *subString)
-{
-    int subStringLength = strlen(subString);
-    return (strncmp(extensionString, subString, subStringLength) == 0)
-        && ((extensionString[subStringLength] == ' ') || (extensionString[subStringLength] == '\0'));
-}
-
-bool necessaryExtensionsSupported()
-{
-    const char *extensionString = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS));
-    const char *p = extensionString;
-
-    const int GL_EXT_FBO = 1;
-    const int GL_ARB_VS = 2;
-    const int GL_ARB_FS = 4;
-    const int GL_ARB_SO = 8;
-    int extensions = 0;
-
-    while (*p) {
-        if (matchString(p, "GL_EXT_framebuffer_object"))
-            extensions |= GL_EXT_FBO;
-        else if (matchString(p, "GL_ARB_vertex_shader"))
-            extensions |= GL_ARB_VS;
-        else if (matchString(p, "GL_ARB_fragment_shader"))
-            extensions |= GL_ARB_FS;
-        else if (matchString(p, "GL_ARB_shader_objects"))
-            extensions |= GL_ARB_SO;
-        while ((*p != ' ') && (*p != '\0'))
-            ++p;
-        if (*p == ' ')
-            ++p;
-    }
-    return (extensions == 15);
-}
-
-int main(int argc, char **argv)
-{
-    QApplication app(argc, argv);
-
-    if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_5) == 0) {
-        QMessageBox::critical(nullptr, "OpenGL features missing",
-            "OpenGL version 1.5 or higher is required to run this demo.\n"
-            "The program will now exit.");
-        return -1;
-    }
-
-    int maxTextureSize = 1024;
-    QGLWidget *widget = new QGLWidget(QGLFormat(QGL::SampleBuffers));
-    widget->makeCurrent();
-
-    if (!necessaryExtensionsSupported()) {
-        QMessageBox::critical(nullptr, "OpenGL features missing",
-            "The OpenGL extensions required to run this demo are missing.\n"
-            "The program will now exit.");
-        delete widget;
-        return -2;
-    }
-
-    // Check if all the necessary functions are resolved.
-    if (!getGLExtensionFunctions().resolve(widget->context())) {
-        QMessageBox::critical(nullptr, "OpenGL features missing",
-            "Failed to resolve OpenGL functions required to run this demo.\n"
-            "The program will now exit.");
-        delete widget;
-        return -3;
-    }
-
-    // TODO: Make conditional for final release
-    QMessageBox::information(nullptr, "For your information",
-        "This demo can be GPU and CPU intensive and may\n"
-        "work poorly or not at all on your system.");
-
-    widget->makeCurrent(); // The current context must be set before calling Scene's constructor
-    Scene scene(1024, 768, maxTextureSize);
-    GraphicsView view;
-    view.setViewport(widget);
-    view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
-    view.setScene(&scene);
-    view.show();
-
-    return app.exec();
-}
-
diff --git a/examples/widgets/graphicsview/boxes/marble.fsh b/examples/widgets/graphicsview/boxes/marble.fsh
deleted file mode 100644
index c0b1980a67..0000000000
--- a/examples/widgets/graphicsview/boxes/marble.fsh
+++ /dev/null
@@ -1,80 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-uniform sampler3D noise;
-
-//const vec4 marbleColors[2] = {vec4(0.9, 0.9, 0.9, 1), vec4(0.6, 0.5, 0.5, 1)};
-uniform vec4 marbleColors[2];
-
-void main()
-{
-    float turbulence = 0.0;
-    float scale = 1.0;
-    for (int i = 0; i < 4; ++i) {
-        turbulence += scale * (texture3D(noise, 0.125 * gl_TexCoord[1].xyz / scale).x - 0.5);
-        scale *= 0.5;
-    }
-
-    vec3 N = normalize(normal);
-    // assume directional light
-
-    gl_MaterialParameters M = gl_FrontMaterial;
-
-    float NdotL = dot(N, lightDirection.xyz);
-    float RdotL = dot(reflect(normalize(position), N), lightDirection.xyz);
-
-    vec4 unlitColor = mix(marbleColors[0], marbleColors[1], exp(-4.0 * abs(turbulence)));
-    gl_FragColor = (ambient + diffuse * max(NdotL, 0.0)) * unlitColor +
-                    M.specular * specular * pow(max(RdotL, 0.0), M.shininess);
-}
diff --git a/examples/widgets/graphicsview/boxes/parameters.par b/examples/widgets/graphicsview/boxes/parameters.par
deleted file mode 100644
index 50e20739b9..0000000000
--- a/examples/widgets/graphicsview/boxes/parameters.par
+++ /dev/null
@@ -1,5 +0,0 @@
-color basicColor ff0e3d0e
-color woodColors ff5e3d33 ffcc9966
-float woodTubulence 0.1
-color graniteColors ff000000 ff4d261a ffccb3bf
-color marbleColors ffe6e6e6 ff998080
diff --git a/examples/widgets/graphicsview/boxes/qt-logo.jpg b/examples/widgets/graphicsview/boxes/qt-logo.jpg
deleted file mode 100644
index 8d7fab052a..0000000000
--- a/examples/widgets/graphicsview/boxes/qt-logo.jpg
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/qt-logo.png b/examples/widgets/graphicsview/boxes/qt-logo.png
deleted file mode 100644
index 0b0b15480c..0000000000
--- a/examples/widgets/graphicsview/boxes/qt-logo.png
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/qtbox.cpp b/examples/widgets/graphicsview/boxes/qtbox.cpp
deleted file mode 100644
index 8713aac05d..0000000000
--- a/examples/widgets/graphicsview/boxes/qtbox.cpp
+++ /dev/null
@@ -1,470 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qtbox.h"
-
-constexpr qreal ROTATE_SPEED_X = 30.0 / 1000.0;
-constexpr qreal ROTATE_SPEED_Y = 20.0 / 1000.0;
-constexpr qreal ROTATE_SPEED_Z = 40.0 / 1000.0;
-constexpr int MAX_ITEM_SIZE = 512;
-constexpr int MIN_ITEM_SIZE = 16;
-
-//============================================================================//
-//                                  ItemBase                                  //
-//============================================================================//
-
-ItemBase::ItemBase(int size, int x, int y) : m_size(size), m_startTime(QTime::currentTime())
-{
-    setFlag(QGraphicsItem::ItemIsMovable, true);
-    setFlag(QGraphicsItem::ItemIsSelectable, true);
-    setFlag(QGraphicsItem::ItemIsFocusable, true);
-    setAcceptHoverEvents(true);
-    setPos(x, y);
-}
-
-QRectF ItemBase::boundingRect() const
-{
-    return QRectF(-m_size / 2, -m_size / 2, m_size, m_size);
-}
-
-void ItemBase::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
-{
-    if (option->state & QStyle::State_Selected) {
-        painter->setRenderHint(QPainter::Antialiasing, true);
-        if (option->state & QStyle::State_HasFocus)
-            painter->setPen(Qt::yellow);
-        else
-            painter->setPen(Qt::white);
-        painter->drawRect(boundingRect());
-
-        painter->drawLine(m_size / 2 - 9, m_size / 2, m_size / 2, m_size / 2 - 9);
-        painter->drawLine(m_size / 2 - 6, m_size / 2, m_size / 2, m_size / 2 - 6);
-        painter->drawLine(m_size / 2 - 3, m_size / 2, m_size / 2, m_size / 2 - 3);
-
-        painter->setRenderHint(QPainter::Antialiasing, false);
-    }
-}
-
-void ItemBase::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
-{
-    if (!isSelected() && scene()) {
-        scene()->clearSelection();
-        setSelected(true);
-    }
-
-    QMenu menu;
-    QAction *delAction = menu.addAction("Delete");
-    QAction *newAction = menu.addAction("New");
-    QAction *growAction = menu.addAction("Grow");
-    QAction *shrinkAction = menu.addAction("Shrink");
-
-    QAction *selectedAction = menu.exec(event->screenPos());
-
-    if (selectedAction == delAction)
-        deleteSelectedItems(scene());
-    else if (selectedAction == newAction)
-        duplicateSelectedItems(scene());
-    else if (selectedAction == growAction)
-        growSelectedItems(scene());
-    else if (selectedAction == shrinkAction)
-        shrinkSelectedItems(scene());
-}
-
-void ItemBase::duplicateSelectedItems(QGraphicsScene *scene)
-{
-    if (!scene)
-        return;
-
-    const QList<QGraphicsItem *> selected = scene->selectedItems();
-    for (QGraphicsItem *item : selected) {
-        ItemBase *itemBase = qgraphicsitem_cast<ItemBase *>(item);
-        if (itemBase)
-            scene->addItem(itemBase->createNew(itemBase->m_size, itemBase->pos().x() + itemBase->m_size, itemBase->pos().y()));
-    }
-}
-
-void ItemBase::deleteSelectedItems(QGraphicsScene *scene)
-{
-    if (!scene)
-        return;
-
-    const QList<QGraphicsItem *> selected = scene->selectedItems();
-    for (QGraphicsItem *item : selected) {
-        ItemBase *itemBase = qgraphicsitem_cast<ItemBase *>(item);
-        if (itemBase)
-            delete itemBase;
-    }
-}
-
-void ItemBase::growSelectedItems(QGraphicsScene *scene)
-{
-    if (!scene)
-        return;
-
-    const QList<QGraphicsItem *> selected = scene->selectedItems();
-    for (QGraphicsItem *item : selected) {
-        ItemBase *itemBase = qgraphicsitem_cast<ItemBase *>(item);
-        if (itemBase) {
-            itemBase->prepareGeometryChange();
-            itemBase->m_size *= 2;
-            if (itemBase->m_size > MAX_ITEM_SIZE)
-                itemBase->m_size = MAX_ITEM_SIZE;
-        }
-    }
-}
-
-void ItemBase::shrinkSelectedItems(QGraphicsScene *scene)
-{
-    if (!scene)
-        return;
-
-    const QList<QGraphicsItem *> selected = scene->selectedItems();
-    for (QGraphicsItem *item : selected) {
-        ItemBase *itemBase = qgraphicsitem_cast<ItemBase *>(item);
-        if (itemBase) {
-            itemBase->prepareGeometryChange();
-            itemBase->m_size /= 2;
-            if (itemBase->m_size < MIN_ITEM_SIZE)
-                itemBase->m_size = MIN_ITEM_SIZE;
-        }
-    }
-}
-
-void ItemBase::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
-{
-    if (m_isResizing) {
-        int dx = int(2.0 * event->pos().x());
-        int dy = int(2.0 * event->pos().y());
-        prepareGeometryChange();
-        m_size = (dx > dy ? dx : dy);
-        if (m_size < MIN_ITEM_SIZE)
-            m_size = MIN_ITEM_SIZE;
-        else if (m_size > MAX_ITEM_SIZE)
-            m_size = MAX_ITEM_SIZE;
-    } else {
-        QGraphicsItem::mouseMoveEvent(event);
-    }
-}
-
-void ItemBase::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
-{
-    if (m_isResizing || (isInResizeArea(event->pos()) && isSelected()))
-        setCursor(Qt::SizeFDiagCursor);
-    else
-        setCursor(Qt::ArrowCursor);
-    QGraphicsItem::hoverMoveEvent(event);
-}
-
-void ItemBase::mousePressEvent(QGraphicsSceneMouseEvent *event)
-{
-    static qreal z = 0.0;
-    setZValue(z += 1.0);
-    if (event->button() == Qt::LeftButton && isInResizeArea(event->pos())) {
-        m_isResizing = true;
-    } else {
-        QGraphicsItem::mousePressEvent(event);
-    }
-}
-
-void ItemBase::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
-{
-    if (event->button() == Qt::LeftButton && m_isResizing) {
-        m_isResizing = false;
-    } else {
-        QGraphicsItem::mouseReleaseEvent(event);
-    }
-}
-
-void ItemBase::keyPressEvent(QKeyEvent *event)
-{
-    switch (event->key()) {
-    case Qt::Key_Delete:
-        deleteSelectedItems(scene());
-        break;
-    case Qt::Key_Insert:
-        duplicateSelectedItems(scene());
-        break;
-    case Qt::Key_Plus:
-        growSelectedItems(scene());
-        break;
-    case Qt::Key_Minus:
-        shrinkSelectedItems(scene());
-        break;
-    default:
-        QGraphicsItem::keyPressEvent(event);
-        break;
-    }
-}
-
-void ItemBase::wheelEvent(QGraphicsSceneWheelEvent *event)
-{
-    prepareGeometryChange();
-    m_size = int(m_size * qExp(-event->delta() / 600.0));
-    m_size = qBound(MIN_ITEM_SIZE, m_size, MAX_ITEM_SIZE);
-}
-
-int ItemBase::type() const
-{
-    return Type;
-}
-
-
-bool ItemBase::isInResizeArea(const QPointF &pos)
-{
-    return (-pos.y() < pos.x() - m_size + 9);
-}
-
-//============================================================================//
-//                                    QtBox                                   //
-//============================================================================//
-
-QtBox::QtBox(int size, int x, int y) : ItemBase(size, x, y)
-{
-    for (int i = 0; i < 8; ++i) {
-        m_vertices[i].setX(i & 1 ? 0.5f : -0.5f);
-        m_vertices[i].setY(i & 2 ? 0.5f : -0.5f);
-        m_vertices[i].setZ(i & 4 ? 0.5f : -0.5f);
-    }
-    for (int i = 0; i < 4; ++i) {
-        m_texCoords[i].setX(i & 1 ? 1.0f : 0.0f);
-        m_texCoords[i].setY(i & 2 ? 1.0f : 0.0f);
-    }
-    m_normals[0] = QVector3D(-1.0f, 0.0f, 0.0f);
-    m_normals[1] = QVector3D(1.0f, 0.0f, 0.0f);
-    m_normals[2] = QVector3D(0.0f, -1.0f, 0.0f);
-    m_normals[3] = QVector3D(0.0f, 1.0f, 0.0f);
-    m_normals[4] = QVector3D(0.0f, 0.0f, -1.0f);
-    m_normals[5] = QVector3D(0.0f, 0.0f, 1.0f);
-}
-
-QtBox::~QtBox()
-{
-    delete m_texture;
-}
-
-ItemBase *QtBox::createNew(int size, int x, int y)
-{
-    return new QtBox(size, x, y);
-}
-
-void QtBox::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
-{
-    QRectF rect = boundingRect().translated(pos());
-    float width = float(painter->device()->width());
-    float height = float(painter->device()->height());
-
-    float left = 2.0f * float(rect.left()) / width - 1.0f;
-    float right = 2.0f * float(rect.right()) / width - 1.0f;
-    float top = 1.0f - 2.0f * float(rect.top()) / height;
-    float bottom = 1.0f - 2.0f * float(rect.bottom()) / height;
-    float moveToRectMatrix[] = {
-        0.5f * (right - left), 0.0f, 0.0f, 0.0f,
-        0.0f, 0.5f * (bottom - top), 0.0f, 0.0f,
-        0.0f, 0.0f, 1.0f, 0.0f,
-        0.5f * (right + left), 0.5f * (bottom + top), 0.0f, 1.0f
-    };
-
-    painter->beginNativePainting();
-
-    glMatrixMode(GL_PROJECTION);
-    glPushMatrix();
-    glLoadMatrixf(moveToRectMatrix);
-    qgluPerspective(60.0, 1.0, 0.01, 10.0);
-
-    glMatrixMode(GL_MODELVIEW);
-    glPushMatrix();
-    glLoadIdentity();
-
-    //glEnable(GL_DEPTH_TEST);
-    glEnable(GL_CULL_FACE);
-    glEnable(GL_LIGHTING);
-    glEnable(GL_COLOR_MATERIAL);
-    glEnable(GL_NORMALIZE);
-
-    if (m_texture == nullptr)
-        m_texture = new GLTexture2D(":/res/boxes/qt-logo.jpg", 64, 64);
-    m_texture->bind();
-    glEnable(GL_TEXTURE_2D);
-
-    glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
-    float lightColour[] = {1.0f, 1.0f, 1.0f, 1.0f};
-    float lightDir[] = {0.0f, 0.0f, 1.0f, 0.0f};
-    glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColour);
-    glLightfv(GL_LIGHT0, GL_POSITION, lightDir);
-    glEnable(GL_LIGHT0);
-
-    glTranslatef(0.0f, 0.0f, -1.5f);
-    glRotatef(ROTATE_SPEED_X * m_startTime.msecsTo(QTime::currentTime()), 1.0f, 0.0f, 0.0f);
-    glRotatef(ROTATE_SPEED_Y * m_startTime.msecsTo(QTime::currentTime()), 0.0f, 1.0f, 0.0f);
-    glRotatef(ROTATE_SPEED_Z * m_startTime.msecsTo(QTime::currentTime()), 0.0f, 0.0f, 1.0f);
-    int dt = m_startTime.msecsTo(QTime::currentTime());
-    if (dt < 500)
-        glScalef(dt / 500.0f, dt / 500.0f, dt / 500.0f);
-
-    for (int dir = 0; dir < 3; ++dir) {
-        glColor4f(1.0f, 1.0f, 1.0f, 1.0);
-
-        glBegin(GL_TRIANGLE_STRIP);
-        glNormal3fv(reinterpret_cast<float *>(&m_normals[2 * dir + 0]));
-        for (int i = 0; i < 2; ++i) {
-            for (int j = 0; j < 2; ++j) {
-                glTexCoord2fv(reinterpret_cast<float *>(&m_texCoords[(j << 1) | i]));
-                glVertex3fv(reinterpret_cast<float *>(&m_vertices[(i << ((dir + 2) % 3)) | (j << ((dir + 1) % 3))]));
-            }
-        }
-        glEnd();
-
-        glBegin(GL_TRIANGLE_STRIP);
-        glNormal3fv(reinterpret_cast<float *>(&m_normals[2 * dir + 1]));
-        for (int i = 0; i < 2; ++i) {
-            for (int j = 0; j < 2; ++j) {
-                glTexCoord2fv(reinterpret_cast<float *>(&m_texCoords[(j << 1) | i]));
-                glVertex3fv(reinterpret_cast<float *>(&m_vertices[(1 << dir) | (i << ((dir + 1) % 3)) | (j << ((dir + 2) % 3))]));
-            }
-        }
-        glEnd();
-    }
-    m_texture->unbind();
-
-    //glDisable(GL_DEPTH_TEST);
-    glDisable(GL_CULL_FACE);
-    glDisable(GL_LIGHTING);
-    glDisable(GL_COLOR_MATERIAL);
-    glDisable(GL_TEXTURE_2D);
-    glDisable(GL_LIGHT0);
-    glDisable(GL_NORMALIZE);
-
-    glPopMatrix();
-
-    glMatrixMode(GL_PROJECTION);
-    glPopMatrix();
-
-    painter->endNativePainting();
-
-    ItemBase::paint(painter, option, widget);
-}
-
-//============================================================================//
-//                                 CircleItem                                 //
-//============================================================================//
-
-CircleItem::CircleItem(int size, int x, int y) : ItemBase(size, x, y)
-    , m_color(QColor::fromHsv(QRandomGenerator::global()->bounded(360), 255, 255))
-{}
-
-void CircleItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
-{
-    int dt = m_startTime.msecsTo(QTime::currentTime());
-
-    qreal r0 = 0.5 * m_size * (1.0 - qExp(-0.001 * ((dt + 3800) % 4000)));
-    qreal r1 = 0.5 * m_size * (1.0 - qExp(-0.001 * ((dt + 0) % 4000)));
-    qreal r2 = 0.5 * m_size * (1.0 - qExp(-0.001 * ((dt + 1800) % 4000)));
-    qreal r3 = 0.5 * m_size * (1.0 - qExp(-0.001 * ((dt + 2000) % 4000)));
-
-    if (r0 > r1)
-        r0 = 0.0;
-    if (r2 > r3)
-        r2 = 0.0;
-
-    QPainterPath path;
-    path.moveTo(r1, 0.0);
-    path.arcTo(-r1, -r1, 2 * r1, 2 * r1, 0.0, 360.0);
-    path.lineTo(r0, 0.0);
-    path.arcTo(-r0, -r0, 2 * r0, 2 * r0, 0.0, -360.0);
-    path.closeSubpath();
-    path.moveTo(r3, 0.0);
-    path.arcTo(-r3, -r3, 2 * r3, 2 * r3, 0.0, 360.0);
-    path.lineTo(r0, 0.0);
-    path.arcTo(-r2, -r2, 2 * r2, 2 * r2, 0.0, -360.0);
-    path.closeSubpath();
-    painter->setRenderHint(QPainter::Antialiasing, true);
-    painter->setBrush(QBrush(m_color));
-    painter->setPen(Qt::NoPen);
-    painter->drawPath(path);
-    painter->setBrush(Qt::NoBrush);
-    painter->setPen(Qt::SolidLine);
-    painter->setRenderHint(QPainter::Antialiasing, false);
-
-    ItemBase::paint(painter, option, widget);
-}
-
-ItemBase *CircleItem::createNew(int size, int x, int y)
-{
-    return new CircleItem(size, x, y);
-}
-
-//============================================================================//
-//                                 SquareItem                                 //
-//============================================================================//
-
-SquareItem::SquareItem(int size, int x, int y) : ItemBase(size, x, y)
-    , m_image(QPixmap(":/res/boxes/square.jpg"))
-{}
-
-void SquareItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
-{
-    int dt = m_startTime.msecsTo(QTime::currentTime());
-    QTransform oldTransform = painter->worldTransform();
-    int dtMod = dt % 2000;
-    qreal amp = 0.002 * (dtMod < 1000 ? dtMod : 2000 - dtMod) - 1.0;
-
-    qreal scale = 0.6 + 0.2 * amp * amp;
-    painter->setWorldTransform(QTransform().rotate(15.0 * amp).scale(scale, scale), true);
-
-    painter->drawPixmap(-m_size / 2, -m_size / 2, m_size, m_size, m_image);
-
-    painter->setWorldTransform(oldTransform, false);
-    ItemBase::paint(painter, option, widget);
-}
-
-ItemBase *SquareItem::createNew(int size, int x, int y)
-{
-    return new SquareItem(size, x, y);
-}
diff --git a/examples/widgets/graphicsview/boxes/qtbox.h b/examples/widgets/graphicsview/boxes/qtbox.h
deleted file mode 100644
index 84c8cb1d93..0000000000
--- a/examples/widgets/graphicsview/boxes/qtbox.h
+++ /dev/null
@@ -1,126 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QTBOX_H
-#define QTBOX_H
-
-#include "glbuffers.h"
-
-#include <QtWidgets>
-#include <QVector3D>
-
-class ItemBase : public QGraphicsItem
-{
-public:
-    enum { Type = UserType + 1 };
-
-    ItemBase(int size, int x, int y);
-    QRectF boundingRect() const override;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
-protected:
-    virtual ItemBase *createNew(int size, int x, int y) = 0;
-    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
-    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
-    void hoverMoveEvent(QGraphicsSceneHoverEvent *event) override;
-    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
-    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
-    void keyPressEvent(QKeyEvent *event) override;
-    void wheelEvent(QGraphicsSceneWheelEvent *event) override;
-    int type() const override;
-    bool isInResizeArea(const QPointF &pos);
-
-    static void duplicateSelectedItems(QGraphicsScene *scene);
-    static void deleteSelectedItems(QGraphicsScene *scene);
-    static void growSelectedItems(QGraphicsScene *scene);
-    static void shrinkSelectedItems(QGraphicsScene *scene);
-
-    int m_size;
-    QTime m_startTime;
-    bool m_isResizing = false;
-};
-
-class QtBox : public ItemBase
-{
-public:
-    QtBox(int size, int x, int y);
-    virtual ~QtBox();
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
-protected:
-    ItemBase *createNew(int size, int x, int y) override;
-private:
-    QVector3D m_vertices[8];
-    QVector3D m_texCoords[4];
-    QVector3D m_normals[6];
-    GLTexture *m_texture = nullptr;
-};
-
-class CircleItem : public ItemBase
-{
-public:
-    CircleItem(int size, int x, int y);
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
-protected:
-    ItemBase *createNew(int size, int x, int y) override;
-
-    QColor m_color;
-};
-
-class SquareItem : public ItemBase
-{
-public:
-    SquareItem(int size, int x, int y);
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
-protected:
-    ItemBase *createNew(int size, int x, int y) override;
-
-    QPixmap m_image;
-};
-
-#endif
diff --git a/examples/widgets/graphicsview/boxes/reflection.fsh b/examples/widgets/graphicsview/boxes/reflection.fsh
deleted file mode 100644
index 0f0a26476f..0000000000
--- a/examples/widgets/graphicsview/boxes/reflection.fsh
+++ /dev/null
@@ -1,63 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-uniform samplerCube env;
-uniform mat4 view;
-
-void main()
-{
-    vec3 N = normalize(normal);
-    vec3 R = 2.0 * dot(-position, N) * N + position;
-    gl_FragColor = textureCube(env, R * mat3(view[0].xyz, view[1].xyz, view[2].xyz));
-}
diff --git a/examples/widgets/graphicsview/boxes/refraction.fsh b/examples/widgets/graphicsview/boxes/refraction.fsh
deleted file mode 100644
index 8ba2d36329..0000000000
--- a/examples/widgets/graphicsview/boxes/refraction.fsh
+++ /dev/null
@@ -1,79 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-uniform samplerCube env;
-uniform mat4 view;
-
-// Arrays don't work here on glsl < 120, apparently.
-//const float coeffs[6] = float[6](1.0/2.0, 1.0/2.1, 1.0/2.2, 1.0/2.3, 1.0/2.4, 1.0/2.5);
-float coeffs(int i)
-{
-	return 1.0 / (2.0 + 0.1 * float(i));
-}
-
-void main()
-{
-    vec3 N = normalize(normal);
-    vec3 I = -normalize(position);
-    float IdotN = dot(I, N);
-    float scales[6];
-    vec3 C[6];
-    for (int i = 0; i < 6; ++i) {
-        scales[i] = (IdotN - sqrt(1.0 - coeffs(i) + coeffs(i) * (IdotN * IdotN)));
-        C[i] = textureCube(env, (-I + coeffs(i) * N) * mat3(view[0].xyz, view[1].xyz, view[2].xyz)).xyz;
-    }
-
-    gl_FragColor = 0.25 * vec4(C[5].x + 2.0*C[0].x + C[1].x, C[1].y + 2.0*C[2].y + C[3].y,
-                   C[3].z + 2.0*C[4].z + C[5].z, 4.0);
-}
diff --git a/examples/widgets/graphicsview/boxes/roundedbox.cpp b/examples/widgets/graphicsview/boxes/roundedbox.cpp
deleted file mode 100644
index be96223b9f..0000000000
--- a/examples/widgets/graphicsview/boxes/roundedbox.cpp
+++ /dev/null
@@ -1,170 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "roundedbox.h"
-
-//============================================================================//
-//                                P3T2N3Vertex                                //
-//============================================================================//
-
-VertexDescription P3T2N3Vertex::description[] = {
-    {VertexDescription::Position, GL_FLOAT, SIZE_OF_MEMBER(P3T2N3Vertex, position) / sizeof(float), 0, 0},
-    {VertexDescription::TexCoord, GL_FLOAT, SIZE_OF_MEMBER(P3T2N3Vertex, texCoord) / sizeof(float), sizeof(QVector3D), 0},
-    {VertexDescription::Normal, GL_FLOAT, SIZE_OF_MEMBER(P3T2N3Vertex, normal) / sizeof(float), sizeof(QVector3D) + sizeof(QVector2D), 0},
-
-    {VertexDescription::Null, 0, 0, 0, 0},
-};
-
-//============================================================================//
-//                                GLRoundedBox                                //
-//============================================================================//
-
-float lerp(float a, float b, float t)
-{
-    return a * (1.0f - t) + b * t;
-}
-
-GLRoundedBox::GLRoundedBox(float r, float scale, int n)
-    : GLTriangleMesh<P3T2N3Vertex, unsigned short>((n+2)*(n+3)*4, (n+1)*(n+1)*24+36+72*(n+1))
-{
-    int vidx = 0, iidx = 0;
-    int vertexCountPerCorner = (n + 2) * (n + 3) / 2;
-
-    P3T2N3Vertex *vp = m_vb.lock();
-    unsigned short *ip = m_ib.lock();
-
-    if (!vp || !ip) {
-        qWarning("GLRoundedBox::GLRoundedBox: Failed to lock vertex buffer and/or index buffer.");
-        m_ib.unlock();
-        m_vb.unlock();
-        return;
-    }
-
-    for (int corner = 0; corner < 8; ++corner) {
-        QVector3D centre(corner & 1 ? 1.0f : -1.0f,
-                corner & 2 ? 1.0f : -1.0f,
-                corner & 4 ? 1.0f : -1.0f);
-        int winding = (corner & 1) ^ ((corner >> 1) & 1) ^ (corner >> 2);
-        int offsX = ((corner ^ 1) - corner) * vertexCountPerCorner;
-        int offsY = ((corner ^ 2) - corner) * vertexCountPerCorner;
-        int offsZ = ((corner ^ 4) - corner) * vertexCountPerCorner;
-
-        // Face polygons
-        if (winding) {
-            ip[iidx++] = vidx;
-            ip[iidx++] = vidx + offsX;
-            ip[iidx++] = vidx + offsY;
-
-            ip[iidx++] = vidx + vertexCountPerCorner - n - 2;
-            ip[iidx++] = vidx + vertexCountPerCorner - n - 2 + offsY;
-            ip[iidx++] = vidx + vertexCountPerCorner - n - 2 + offsZ;
-
-            ip[iidx++] = vidx + vertexCountPerCorner - 1;
-            ip[iidx++] = vidx + vertexCountPerCorner - 1 + offsZ;
-            ip[iidx++] = vidx + vertexCountPerCorner - 1 + offsX;
-        }
-
-        for (int i = 0; i < n + 2; ++i) {
-
-            // Edge polygons
-            if (winding && i < n + 1) {
-                ip[iidx++] = vidx + i + 1;
-                ip[iidx++] = vidx;
-                ip[iidx++] = vidx + offsY + i + 1;
-                ip[iidx++] = vidx + offsY;
-                ip[iidx++] = vidx + offsY + i + 1;
-                ip[iidx++] = vidx;
-
-                ip[iidx++] = vidx + i;
-                ip[iidx++] = vidx + 2 * i + 2;
-                ip[iidx++] = vidx + i + offsX;
-                ip[iidx++] = vidx + 2 * i + offsX + 2;
-                ip[iidx++] = vidx + i + offsX;
-                ip[iidx++] = vidx + 2 * i + 2;
-
-                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 1 - i;
-                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 2 - i;
-                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 1 - i + offsZ;
-                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 2 - i + offsZ;
-                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 1 - i + offsZ;
-                ip[iidx++] = (corner + 1) * vertexCountPerCorner - 2 - i;
-            }
-
-            for (int j = 0; j <= i; ++j) {
-                QVector3D normal = QVector3D(i - j, j, n + 1 - i).normalized();
-                QVector3D offset(0.5f - r, 0.5f - r, 0.5f - r);
-                QVector3D pos = centre * (offset + r * normal);
-
-                vp[vidx].position = scale * pos;
-                vp[vidx].normal = centre * normal;
-                vp[vidx].texCoord = QVector2D(pos.x() + 0.5f, pos.y() + 0.5f);
-
-                // Corner polygons
-                if (i < n + 1) {
-                    ip[iidx++] = vidx;
-                    ip[iidx++] = vidx + i + 2 - winding;
-                    ip[iidx++] = vidx + i + 1 + winding;
-                }
-                if (i < n) {
-                    ip[iidx++] = vidx + i + 1 + winding;
-                    ip[iidx++] = vidx + i + 2 - winding;
-                    ip[iidx++] = vidx + 2 * i + 4;
-                }
-
-                ++vidx;
-            }
-        }
-
-    }
-
-    m_ib.unlock();
-    m_vb.unlock();
-}
-
diff --git a/examples/widgets/graphicsview/boxes/roundedbox.h b/examples/widgets/graphicsview/boxes/roundedbox.h
deleted file mode 100644
index a1f15cd631..0000000000
--- a/examples/widgets/graphicsview/boxes/roundedbox.h
+++ /dev/null
@@ -1,77 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef ROUNDEDBOX_H
-#define ROUNDEDBOX_H
-
-#include "glbuffers.h"
-#include "glextensions.h"
-#include "gltrianglemesh.h"
-
-#include <QVector2D>
-#include <QVector3D>
-
-struct P3T2N3Vertex
-{
-    QVector3D position;
-    QVector2D texCoord;
-    QVector3D normal;
-    static VertexDescription description[];
-};
-
-class GLRoundedBox : public GLTriangleMesh<P3T2N3Vertex, unsigned short>
-{
-public:
-    // 0 < r < 0.5, 0 <= n <= 125
-    explicit GLRoundedBox(float r = 0.25f, float scale = 1.0f, int n = 10);
-};
-
-
-#endif
diff --git a/examples/widgets/graphicsview/boxes/scene.cpp b/examples/widgets/graphicsview/boxes/scene.cpp
deleted file mode 100644
index b344f65561..0000000000
--- a/examples/widgets/graphicsview/boxes/scene.cpp
+++ /dev/null
@@ -1,1028 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "scene.h"
-
-#include <QMatrix4x4>
-#include <QRandomGenerator>
-#include <QVector3D>
-#include <qmath.h>
-
-#include "3rdparty/fbm.h"
-
-//============================================================================//
-//                                  ColorEdit                                 //
-//============================================================================//
-
-ColorEdit::ColorEdit(QRgb initialColor, int id)
-    : m_color(initialColor), m_id(id)
-{
-    QHBoxLayout *layout = new QHBoxLayout;
-    setLayout(layout);
-    layout->setContentsMargins(0, 0, 0, 0);
-
-    m_lineEdit = new QLineEdit(QString::number(m_color, 16));
-    layout->addWidget(m_lineEdit);
-
-    m_button = new QFrame;
-    QPalette palette = m_button->palette();
-    palette.setColor(QPalette::Window, QColor(m_color));
-    m_button->setPalette(palette);
-    m_button->setAutoFillBackground(true);
-    m_button->setMinimumSize(32, 0);
-    m_button->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
-    m_button->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
-    layout->addWidget(m_button);
-
-    connect(m_lineEdit, &QLineEdit::editingFinished, this, &ColorEdit::editDone);
-}
-
-void ColorEdit::editDone()
-{
-    bool ok;
-    QRgb newColor = m_lineEdit->text().toUInt(&ok, 16);
-    if (ok)
-        setColor(newColor);
-}
-
-void ColorEdit::mousePressEvent(QMouseEvent *event)
-{
-    if (event->button() == Qt::LeftButton) {
-        QColor color(m_color);
-        QColorDialog dialog(color, nullptr);
-        dialog.setOption(QColorDialog::ShowAlphaChannel, true);
-        dialog.move(280, 120);
-        if (dialog.exec() == QDialog::Rejected)
-            return;
-        QRgb newColor = dialog.selectedColor().rgba();
-        if (newColor == m_color)
-            return;
-        setColor(newColor);
-    }
-}
-
-void ColorEdit::setColor(QRgb color)
-{
-    m_color = color;
-    m_lineEdit->setText(QString::number(m_color, 16)); // "Clean up" text
-    QPalette palette = m_button->palette();
-    palette.setColor(QPalette::Window, QColor(m_color));
-    m_button->setPalette(palette);
-    emit colorChanged(m_color, m_id);
-}
-
-//============================================================================//
-//                                  FloatEdit                                 //
-//============================================================================//
-
-FloatEdit::FloatEdit(float initialValue, int id)
-    : m_value(initialValue), m_id(id)
-{
-    QHBoxLayout *layout = new QHBoxLayout;
-    setLayout(layout);
-    layout->setContentsMargins(0, 0, 0, 0);
-
-    m_lineEdit = new QLineEdit(QString::number(m_value));
-    layout->addWidget(m_lineEdit);
-
-    connect(m_lineEdit, &QLineEdit::editingFinished, this, &FloatEdit::editDone);
-}
-
-void FloatEdit::editDone()
-{
-    bool ok;
-    float newValue = m_lineEdit->text().toFloat(&ok);
-    if (ok) {
-        m_value = newValue;
-        m_lineEdit->setText(QString::number(m_value)); // "Clean up" text
-        emit valueChanged(m_value, m_id);
-    }
-}
-
-//============================================================================//
-//                           TwoSidedGraphicsWidget                           //
-//============================================================================//
-void TwoSidedGraphicsWidget::setWidget(int index, QWidget *widget)
-{
-    if (index < 0 || index >= 2)
-    {
-        qWarning("TwoSidedGraphicsWidget::setWidget: Index out of bounds, index == %d", index);
-        return;
-    }
-
-    GraphicsWidget *proxy = new GraphicsWidget;
-    proxy->setWidget(widget);
-
-    delete m_proxyWidgets[index];
-    m_proxyWidgets[index] = proxy;
-
-    proxy->setCacheMode(QGraphicsItem::ItemCoordinateCache);
-    proxy->setZValue(1e30); // Make sure the dialog is drawn on top of all other (OpenGL) items
-
-    if (index != m_current)
-        proxy->setVisible(false);
-
-    qobject_cast<QGraphicsScene *>(parent())->addItem(proxy);
-}
-
-QWidget *TwoSidedGraphicsWidget::widget(int index)
-{
-    if (index < 0 || index >= 2)
-    {
-        qWarning("TwoSidedGraphicsWidget::widget: Index out of bounds, index == %d", index);
-        return nullptr;
-    }
-    return m_proxyWidgets[index]->widget();
-}
-
-void TwoSidedGraphicsWidget::flip()
-{
-    m_delta = (m_current == 0 ? 9 : -9);
-    animateFlip();
-}
-
-void TwoSidedGraphicsWidget::animateFlip()
-{
-    m_angle += m_delta;
-    if (m_angle == 90) {
-        int old = m_current;
-        m_current ^= 1;
-        m_proxyWidgets[old]->setVisible(false);
-        m_proxyWidgets[m_current]->setVisible(true);
-        m_proxyWidgets[m_current]->setGeometry(m_proxyWidgets[old]->geometry());
-    }
-
-    QRectF r = m_proxyWidgets[m_current]->boundingRect();
-    m_proxyWidgets[m_current]->setTransform(QTransform()
-        .translate(r.width() / 2, r.height() / 2)
-        .rotate(m_angle - 180 * m_current, Qt::YAxis)
-        .translate(-r.width() / 2, -r.height() / 2));
-
-    if ((m_current == 0 && m_angle > 0) || (m_current == 1 && m_angle < 180))
-        QTimer::singleShot(25, this, &TwoSidedGraphicsWidget::animateFlip);
-}
-
-QVariant GraphicsWidget::itemChange(GraphicsItemChange change, const QVariant &value)
-{
-    if (change == ItemPositionChange && scene()) {
-        QRectF rect = boundingRect();
-        QPointF pos = value.toPointF();
-        QRectF sceneRect = scene()->sceneRect();
-        if (pos.x() + rect.left() < sceneRect.left())
-            pos.setX(sceneRect.left() - rect.left());
-        else if (pos.x() + rect.right() >= sceneRect.right())
-            pos.setX(sceneRect.right() - rect.right());
-        if (pos.y() + rect.top() < sceneRect.top())
-            pos.setY(sceneRect.top() - rect.top());
-        else if (pos.y() + rect.bottom() >= sceneRect.bottom())
-            pos.setY(sceneRect.bottom() - rect.bottom());
-        return pos;
-    }
-    return QGraphicsProxyWidget::itemChange(change, value);
-}
-
-void GraphicsWidget::resizeEvent(QGraphicsSceneResizeEvent *event)
-{
-    setCacheMode(QGraphicsItem::NoCache);
-    setCacheMode(QGraphicsItem::ItemCoordinateCache);
-    QGraphicsProxyWidget::resizeEvent(event);
-}
-
-void GraphicsWidget::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
-{
-    painter->setRenderHint(QPainter::Antialiasing, false);
-    QGraphicsProxyWidget::paint(painter, option, widget);
-    //painter->setRenderHint(QPainter::Antialiasing, true);
-}
-
-//============================================================================//
-//                             RenderOptionsDialog                            //
-//============================================================================//
-
-RenderOptionsDialog::RenderOptionsDialog()
-    : QDialog(nullptr, Qt::CustomizeWindowHint | Qt::WindowTitleHint)
-{
-    setWindowOpacity(0.75);
-    setWindowTitle(tr("Options (double click to flip)"));
-    QGridLayout *layout = new QGridLayout;
-    setLayout(layout);
-    layout->setColumnStretch(1, 1);
-
-    int row = 0;
-
-    QCheckBox *check = new QCheckBox(tr("Dynamic cube map"));
-    check->setCheckState(Qt::Unchecked);
-    // Dynamic cube maps are only enabled when multi-texturing and render to texture are available.
-    check->setEnabled(glActiveTexture && glGenFramebuffersEXT);
-    connect(check, &QCheckBox::stateChanged, this, &RenderOptionsDialog::dynamicCubemapToggled);
-    layout->addWidget(check, 0, 0, 1, 2);
-    ++row;
-
-    // Load all .par files
-    // .par files have a simple syntax for specifying user adjustable uniform variables.
-    const QList<QFileInfo> files = QDir(QStringLiteral(":/res/boxes/"))
-            .entryInfoList({ QStringLiteral("*.par") },
-                           QDir::Files | QDir::Readable);
-
-    for (const QFileInfo &fileInfo : files) {
-        QFile file(fileInfo.absoluteFilePath());
-        if (file.open(QIODevice::ReadOnly)) {
-            while (!file.atEnd()) {
-                QList<QByteArray> tokens = file.readLine().simplified().split(' ');
-                QList<QByteArray>::const_iterator it = tokens.begin();
-                if (it == tokens.end())
-                    continue;
-                QByteArray type = *it;
-                if (++it == tokens.end())
-                    continue;
-                QByteArray name = *it;
-                bool singleElement = (tokens.size() == 3); // type, name and one value
-                char counter[10] = "000000000";
-                int counterPos = 8; // position of last digit
-                while (++it != tokens.end()) {
-                    m_parameterNames << name;
-                    if (!singleElement) {
-                        m_parameterNames.back() += '[';
-                        m_parameterNames.back() += counter + counterPos;
-                        m_parameterNames.back() += ']';
-                        int j = 8; // position of last digit
-                        ++counter[j];
-                        while (j > 0 && counter[j] > '9') {
-                            counter[j] = '0';
-                            ++counter[--j];
-                        }
-                        if (j < counterPos)
-                            counterPos = j;
-                    }
-
-                    if (type == "color") {
-                        layout->addWidget(new QLabel(m_parameterNames.back()));
-                        bool ok;
-                        ColorEdit *colorEdit = new ColorEdit(it->toUInt(&ok, 16), m_parameterNames.size() - 1);
-                        m_parameterEdits << colorEdit;
-                        layout->addWidget(colorEdit);
-                        connect(colorEdit, &ColorEdit::colorChanged, this, &RenderOptionsDialog::setColorParameter);
-                        ++row;
-                    } else if (type == "float") {
-                        layout->addWidget(new QLabel(m_parameterNames.back()));
-                        bool ok;
-                        FloatEdit *floatEdit = new FloatEdit(it->toFloat(&ok), m_parameterNames.size() - 1);
-                        m_parameterEdits << floatEdit;
-                        layout->addWidget(floatEdit);
-                        connect(floatEdit, &FloatEdit::valueChanged, this, &RenderOptionsDialog::setFloatParameter);
-                        ++row;
-                    }
-                }
-            }
-            file.close();
-        }
-    }
-
-    layout->addWidget(new QLabel(tr("Texture:")));
-    m_textureCombo = new QComboBox;
-    connect(m_textureCombo, QOverload<int>::of(&QComboBox::currentIndexChanged),
-            this, &RenderOptionsDialog::textureChanged);
-    layout->addWidget(m_textureCombo);
-    ++row;
-
-    layout->addWidget(new QLabel(tr("Shader:")));
-    m_shaderCombo = new QComboBox;
-    connect(m_shaderCombo, QOverload<int>::of(&QComboBox::currentIndexChanged),
-            this, &RenderOptionsDialog::shaderChanged);
-    layout->addWidget(m_shaderCombo);
-    ++row;
-
-    layout->setRowStretch(row, 1);
-}
-
-int RenderOptionsDialog::addTexture(const QString &name)
-{
-    m_textureCombo->addItem(name);
-    return m_textureCombo->count() - 1;
-}
-
-int RenderOptionsDialog::addShader(const QString &name)
-{
-    m_shaderCombo->addItem(name);
-    return m_shaderCombo->count() - 1;
-}
-
-void RenderOptionsDialog::emitParameterChanged()
-{
-    for (ParameterEdit *edit : qAsConst(m_parameterEdits))
-        edit->emitChange();
-}
-
-void RenderOptionsDialog::setColorParameter(QRgb color, int id)
-{
-    emit colorParameterChanged(m_parameterNames[id], color);
-}
-
-void RenderOptionsDialog::setFloatParameter(float value, int id)
-{
-    emit floatParameterChanged(m_parameterNames[id], value);
-}
-
-void RenderOptionsDialog::mouseDoubleClickEvent(QMouseEvent *event)
-{
-    if (event->button() == Qt::LeftButton)
-        emit doubleClicked();
-}
-
-//============================================================================//
-//                                 ItemDialog                                 //
-//============================================================================//
-
-ItemDialog::ItemDialog()
-    : QDialog(nullptr, Qt::CustomizeWindowHint | Qt::WindowTitleHint)
-{
-    setWindowTitle(tr("Items (double click to flip)"));
-    setWindowOpacity(0.75);
-    resize(160, 100);
-
-    QVBoxLayout *layout = new QVBoxLayout;
-    setLayout(layout);
-    QPushButton *button;
-
-    button = new QPushButton(tr("Add Qt box"));
-    layout->addWidget(button);
-    connect(button, &QAbstractButton::clicked, this, &ItemDialog::triggerNewQtBox);
-
-    button = new QPushButton(tr("Add circle"));
-    layout->addWidget(button);
-    connect(button, &QAbstractButton::clicked, this, &ItemDialog::triggerNewCircleItem);
-
-    button = new QPushButton(tr("Add square"));
-    layout->addWidget(button);
-    connect(button, &QAbstractButton::clicked, this, &ItemDialog::triggerNewSquareItem);
-
-    layout->addStretch(1);
-}
-
-void ItemDialog::triggerNewQtBox()
-{
-    emit newItemTriggered(QtBoxItem);
-}
-
-void ItemDialog::triggerNewCircleItem()
-{
-    emit newItemTriggered(CircleItem);
-}
-
-void ItemDialog::triggerNewSquareItem()
-{
-    emit newItemTriggered(SquareItem);
-}
-
-void ItemDialog::mouseDoubleClickEvent(QMouseEvent *event)
-{
-    if (event->button() == Qt::LeftButton)
-        emit doubleClicked();
-}
-
-//============================================================================//
-//                                    Scene                                   //
-//============================================================================//
-
-const static char environmentShaderText[] =
-    "uniform samplerCube env;"
-    "void main() {"
-        "gl_FragColor = textureCube(env, gl_TexCoord[1].xyz);"
-    "}";
-
-Scene::Scene(int width, int height, int maxTextureSize)
-    : m_distExp(600)
-    , m_frame(0)
-    , m_maxTextureSize(maxTextureSize)
-    , m_currentShader(0)
-    , m_currentTexture(0)
-    , m_dynamicCubemap(false)
-    , m_updateAllCubemaps(true)
-    , m_box(nullptr)
-    , m_vertexShader(nullptr)
-    , m_environmentShader(nullptr)
-    , m_environmentProgram(nullptr)
-{
-    setSceneRect(0, 0, width, height);
-
-    m_trackBalls[0] = TrackBall(0.05f, QVector3D(0, 1, 0), TrackBall::Sphere);
-    m_trackBalls[1] = TrackBall(0.005f, QVector3D(0, 0, 1), TrackBall::Sphere);
-    m_trackBalls[2] = TrackBall(0.0f, QVector3D(0, 1, 0), TrackBall::Plane);
-
-    m_renderOptions = new RenderOptionsDialog;
-    m_renderOptions->move(20, 120);
-    m_renderOptions->resize(m_renderOptions->sizeHint());
-
-    connect(m_renderOptions, &RenderOptionsDialog::dynamicCubemapToggled, this, &Scene::toggleDynamicCubemap);
-    connect(m_renderOptions, &RenderOptionsDialog::colorParameterChanged, this, &Scene::setColorParameter);
-    connect(m_renderOptions, &RenderOptionsDialog::floatParameterChanged, this, &Scene::setFloatParameter);
-    connect(m_renderOptions, &RenderOptionsDialog::textureChanged, this, &Scene::setTexture);
-    connect(m_renderOptions, &RenderOptionsDialog::shaderChanged, this, &Scene::setShader);
-
-    m_itemDialog = new ItemDialog;
-    connect(m_itemDialog, &ItemDialog::newItemTriggered, this, &Scene::newItem);
-
-    TwoSidedGraphicsWidget *twoSided = new TwoSidedGraphicsWidget(this);
-    twoSided->setWidget(0, m_renderOptions);
-    twoSided->setWidget(1, m_itemDialog);
-
-    connect(m_renderOptions, &RenderOptionsDialog::doubleClicked, twoSided, &TwoSidedGraphicsWidget::flip);
-    connect(m_itemDialog, &ItemDialog::doubleClicked, twoSided, &TwoSidedGraphicsWidget::flip);
-
-    addItem(new QtBox(64, width - 64, height - 64));
-    addItem(new QtBox(64, width - 64, 64));
-    addItem(new QtBox(64, 64, height - 64));
-    addItem(new QtBox(64, 64, 64));
-
-    initGL();
-
-    m_timer = new QTimer(this);
-    m_timer->setInterval(20);
-    connect(m_timer, &QTimer::timeout, this, [this](){ update(); });
-    m_timer->start();
-}
-
-Scene::~Scene()
-{
-    delete m_box;
-    qDeleteAll(m_textures);
-    delete m_mainCubemap;
-    qDeleteAll(m_programs);
-    delete m_vertexShader;
-    qDeleteAll(m_fragmentShaders);
-    qDeleteAll(m_cubemaps);
-    delete m_environmentShader;
-    delete m_environmentProgram;
-}
-
-void Scene::initGL()
-{
-    m_box = new GLRoundedBox(0.25f, 1.0f, 10);
-
-    m_vertexShader = new QGLShader(QGLShader::Vertex);
-    m_vertexShader->compileSourceFile(QLatin1String(":/res/boxes/basic.vsh"));
-
-    QStringList list;
-    list << ":/res/boxes/cubemap_posx.jpg" << ":/res/boxes/cubemap_negx.jpg" << ":/res/boxes/cubemap_posy.jpg"
-         << ":/res/boxes/cubemap_negy.jpg" << ":/res/boxes/cubemap_posz.jpg" << ":/res/boxes/cubemap_negz.jpg";
-    m_environment = new GLTextureCube(list, qMin(1024, m_maxTextureSize));
-    m_environmentShader = new QGLShader(QGLShader::Fragment);
-    m_environmentShader->compileSourceCode(environmentShaderText);
-    m_environmentProgram = new QGLShaderProgram;
-    m_environmentProgram->addShader(m_vertexShader);
-    m_environmentProgram->addShader(m_environmentShader);
-    m_environmentProgram->link();
-
-    const int NOISE_SIZE = 128; // for a different size, B and BM in fbm.c must also be changed
-    m_noise = new GLTexture3D(NOISE_SIZE, NOISE_SIZE, NOISE_SIZE);
-    QVector<QRgb> data(NOISE_SIZE * NOISE_SIZE * NOISE_SIZE, QRgb(0));
-    QRgb *p = data.data();
-    float pos[3];
-    for (int k = 0; k < NOISE_SIZE; ++k) {
-        pos[2] = k * (0x20 / (float)NOISE_SIZE);
-        for (int j = 0; j < NOISE_SIZE; ++j) {
-            for (int i = 0; i < NOISE_SIZE; ++i) {
-                for (int byte = 0; byte < 4; ++byte) {
-                    pos[0] = (i + (byte & 1) * 16) * (0x20 / (float)NOISE_SIZE);
-                    pos[1] = (j + (byte & 2) * 8) * (0x20 / (float)NOISE_SIZE);
-                    *p |= (int)(128.0f * (noise3(pos) + 1.0f)) << (byte * 8);
-                }
-                ++p;
-            }
-        }
-    }
-    m_noise->load(NOISE_SIZE, NOISE_SIZE, NOISE_SIZE, data.data());
-
-    m_mainCubemap = new GLRenderTargetCube(512);
-
-    QList<QFileInfo> files;
-
-    // Load all .png files as textures
-    m_currentTexture = 0;
-    files = QDir(":/res/boxes/").entryInfoList({ QStringLiteral("*.png") }, QDir::Files | QDir::Readable);
-
-    for (const QFileInfo &file : qAsConst(files)) {
-        GLTexture *texture = new GLTexture2D(file.absoluteFilePath(), qMin(256, m_maxTextureSize), qMin(256, m_maxTextureSize));
-        if (texture->failed()) {
-            delete texture;
-            continue;
-        }
-        m_textures << texture;
-        m_renderOptions->addTexture(file.baseName());
-    }
-
-    if (m_textures.size() == 0)
-        m_textures << new GLTexture2D(qMin(64, m_maxTextureSize), qMin(64, m_maxTextureSize));
-
-    // Load all .fsh files as fragment shaders
-    m_currentShader = 0;
-    files = QDir(":/res/boxes/").entryInfoList({ QStringLiteral("*.fsh") }, QDir::Files | QDir::Readable);
-    for (const QFileInfo &file : qAsConst(files)) {
-        QGLShaderProgram *program = new QGLShaderProgram;
-        QGLShader* shader = new QGLShader(QGLShader::Fragment);
-        shader->compileSourceFile(file.absoluteFilePath());
-        // The program does not take ownership over the shaders, so store them in a vector so they can be deleted afterwards.
-        program->addShader(m_vertexShader);
-        program->addShader(shader);
-        if (!program->link()) {
-            qWarning("Failed to compile and link shader program");
-            qWarning("Vertex shader log:");
-            qWarning() << m_vertexShader->log();
-            qWarning() << "Fragment shader log ( file =" << file.absoluteFilePath() << "):";
-            qWarning() << shader->log();
-            qWarning("Shader program log:");
-            qWarning() << program->log();
-
-            delete shader;
-            delete program;
-            continue;
-        }
-
-        m_fragmentShaders << shader;
-        m_programs << program;
-        m_renderOptions->addShader(file.baseName());
-
-        program->bind();
-        m_cubemaps << ((program->uniformLocation("env") != -1) ? new GLRenderTargetCube(qMin(256, m_maxTextureSize)) : nullptr);
-        program->release();
-    }
-
-    if (m_programs.size() == 0)
-        m_programs << new QGLShaderProgram;
-
-    m_renderOptions->emitParameterChanged();
-}
-
-static void loadMatrix(const QMatrix4x4 &m)
-{
-    // static to prevent glLoadMatrixf to fail on certain drivers
-    static GLfloat mat[16];
-    const float *data = m.constData();
-    for (int index = 0; index < 16; ++index)
-        mat[index] = data[index];
-    glLoadMatrixf(mat);
-}
-
-// If one of the boxes should not be rendered, set excludeBox to its index.
-// If the main box should not be rendered, set excludeBox to -1.
-void Scene::renderBoxes(const QMatrix4x4 &view, int excludeBox)
-{
-    QMatrix4x4 invView = view.inverted();
-
-    // If multi-texturing is supported, use three saplers.
-    if (glActiveTexture) {
-        glActiveTexture(GL_TEXTURE0);
-        m_textures[m_currentTexture]->bind();
-        glActiveTexture(GL_TEXTURE2);
-        m_noise->bind();
-        glActiveTexture(GL_TEXTURE1);
-    } else {
-        m_textures[m_currentTexture]->bind();
-    }
-
-    glDisable(GL_LIGHTING);
-    glDisable(GL_CULL_FACE);
-
-    QMatrix4x4 viewRotation(view);
-    viewRotation(3, 0) = viewRotation(3, 1) = viewRotation(3, 2) = 0.0f;
-    viewRotation(0, 3) = viewRotation(1, 3) = viewRotation(2, 3) = 0.0f;
-    viewRotation(3, 3) = 1.0f;
-    loadMatrix(viewRotation);
-    glScalef(20.0f, 20.0f, 20.0f);
-
-    // Don't render the environment if the environment texture can't be set for the correct sampler.
-    if (glActiveTexture) {
-        m_environment->bind();
-        m_environmentProgram->bind();
-        m_environmentProgram->setUniformValue("tex", GLint(0));
-        m_environmentProgram->setUniformValue("env", GLint(1));
-        m_environmentProgram->setUniformValue("noise", GLint(2));
-        m_box->draw();
-        m_environmentProgram->release();
-        m_environment->unbind();
-    }
-
-    loadMatrix(view);
-
-    glEnable(GL_CULL_FACE);
-    glEnable(GL_LIGHTING);
-
-    for (int i = 0; i < m_programs.size(); ++i) {
-        if (i == excludeBox)
-            continue;
-
-        glPushMatrix();
-        QMatrix4x4 m;
-        m.rotate(m_trackBalls[1].rotation());
-        glMultMatrixf(m.constData());
-
-        glRotatef(360.0f * i / m_programs.size(), 0.0f, 0.0f, 1.0f);
-        glTranslatef(2.0f, 0.0f, 0.0f);
-        glScalef(0.3f, 0.6f, 0.6f);
-
-        if (glActiveTexture) {
-            if (m_dynamicCubemap && m_cubemaps[i])
-                m_cubemaps[i]->bind();
-            else
-                m_environment->bind();
-        }
-        m_programs[i]->bind();
-        m_programs[i]->setUniformValue("tex", GLint(0));
-        m_programs[i]->setUniformValue("env", GLint(1));
-        m_programs[i]->setUniformValue("noise", GLint(2));
-        m_programs[i]->setUniformValue("view", view);
-        m_programs[i]->setUniformValue("invView", invView);
-        m_box->draw();
-        m_programs[i]->release();
-
-        if (glActiveTexture) {
-            if (m_dynamicCubemap && m_cubemaps[i])
-                m_cubemaps[i]->unbind();
-            else
-                m_environment->unbind();
-        }
-        glPopMatrix();
-    }
-
-    if (-1 != excludeBox) {
-        QMatrix4x4 m;
-        m.rotate(m_trackBalls[0].rotation());
-        glMultMatrixf(m.constData());
-
-        if (glActiveTexture) {
-            if (m_dynamicCubemap)
-                m_mainCubemap->bind();
-            else
-                m_environment->bind();
-        }
-
-        m_programs[m_currentShader]->bind();
-        m_programs[m_currentShader]->setUniformValue("tex", GLint(0));
-        m_programs[m_currentShader]->setUniformValue("env", GLint(1));
-        m_programs[m_currentShader]->setUniformValue("noise", GLint(2));
-        m_programs[m_currentShader]->setUniformValue("view", view);
-        m_programs[m_currentShader]->setUniformValue("invView", invView);
-        m_box->draw();
-        m_programs[m_currentShader]->release();
-
-        if (glActiveTexture) {
-            if (m_dynamicCubemap)
-                m_mainCubemap->unbind();
-            else
-                m_environment->unbind();
-        }
-    }
-
-    if (glActiveTexture) {
-        glActiveTexture(GL_TEXTURE2);
-        m_noise->unbind();
-        glActiveTexture(GL_TEXTURE0);
-    }
-    m_textures[m_currentTexture]->unbind();
-}
-
-void Scene::setStates()
-{
-    //glClearColor(0.25f, 0.25f, 0.5f, 1.0f);
-
-    glEnable(GL_DEPTH_TEST);
-    glEnable(GL_CULL_FACE);
-    glEnable(GL_LIGHTING);
-    //glEnable(GL_COLOR_MATERIAL);
-    glEnable(GL_TEXTURE_2D);
-    glEnable(GL_NORMALIZE);
-
-    glMatrixMode(GL_PROJECTION);
-    glPushMatrix();
-    glLoadIdentity();
-
-    glMatrixMode(GL_MODELVIEW);
-    glPushMatrix();
-    glLoadIdentity();
-
-    setLights();
-
-    float materialSpecular[] = {0.5f, 0.5f, 0.5f, 1.0f};
-    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, materialSpecular);
-    glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 32.0f);
-}
-
-void Scene::setLights()
-{
-    glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
-    //float lightColour[] = {1.0f, 1.0f, 1.0f, 1.0f};
-    float lightDir[] = {0.0f, 0.0f, 1.0f, 0.0f};
-    //glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColour);
-    //glLightfv(GL_LIGHT0, GL_SPECULAR, lightColour);
-    glLightfv(GL_LIGHT0, GL_POSITION, lightDir);
-    glLightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER, 1.0f);
-    glEnable(GL_LIGHT0);
-}
-
-void Scene::defaultStates()
-{
-    //glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
-
-    glDisable(GL_DEPTH_TEST);
-    glDisable(GL_CULL_FACE);
-    glDisable(GL_LIGHTING);
-    //glDisable(GL_COLOR_MATERIAL);
-    glDisable(GL_TEXTURE_2D);
-    glDisable(GL_LIGHT0);
-    glDisable(GL_NORMALIZE);
-
-    glMatrixMode(GL_MODELVIEW);
-    glPopMatrix();
-
-    glMatrixMode(GL_PROJECTION);
-    glPopMatrix();
-
-    glLightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER, 0.0f);
-    float defaultMaterialSpecular[] = {0.0f, 0.0f, 0.0f, 1.0f};
-    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, defaultMaterialSpecular);
-    glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 0.0f);
-}
-
-void Scene::renderCubemaps()
-{
-    // To speed things up, only update the cubemaps for the small cubes every N frames.
-    const int N = (m_updateAllCubemaps ? 1 : 3);
-
-    QMatrix4x4 mat;
-    GLRenderTargetCube::getProjectionMatrix(mat, 0.1f, 100.0f);
-
-    glMatrixMode(GL_PROJECTION);
-    glPushMatrix();
-    loadMatrix(mat);
-
-    glMatrixMode(GL_MODELVIEW);
-    glPushMatrix();
-
-    QVector3D center;
-
-    const float eachAngle = 2 * M_PI / m_cubemaps.size();
-    for (int i = m_frame % N; i < m_cubemaps.size(); i += N) {
-        if (0 == m_cubemaps[i])
-            continue;
-
-        float angle = i * eachAngle;
-
-        center = m_trackBalls[1].rotation().rotatedVector(QVector3D(std::cos(angle), std::sin(angle), 0.0f));
-
-        for (int face = 0; face < 6; ++face) {
-            m_cubemaps[i]->begin(face);
-
-            GLRenderTargetCube::getViewMatrix(mat, face);
-            QVector4D v = QVector4D(-center.x(), -center.y(), -center.z(), 1.0);
-            mat.setColumn(3, mat * v);
-
-            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-            renderBoxes(mat, i);
-
-            m_cubemaps[i]->end();
-        }
-    }
-
-    for (int face = 0; face < 6; ++face) {
-        m_mainCubemap->begin(face);
-        GLRenderTargetCube::getViewMatrix(mat, face);
-
-        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-        renderBoxes(mat, -1);
-
-        m_mainCubemap->end();
-    }
-
-    glPopMatrix();
-
-    glMatrixMode(GL_PROJECTION);
-    glPopMatrix();
-
-    m_updateAllCubemaps = false;
-}
-
-void Scene::drawBackground(QPainter *painter, const QRectF &)
-{
-    float width = float(painter->device()->width());
-    float height = float(painter->device()->height());
-
-    painter->beginNativePainting();
-    setStates();
-
-    if (m_dynamicCubemap)
-        renderCubemaps();
-
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
-    glMatrixMode(GL_PROJECTION);
-    qgluPerspective(60.0, width / height, 0.01, 15.0);
-
-    glMatrixMode(GL_MODELVIEW);
-
-    QMatrix4x4 view;
-    view.rotate(m_trackBalls[2].rotation());
-    view(2, 3) -= 2.0f * std::exp(m_distExp / 1200.0f);
-    renderBoxes(view);
-
-    defaultStates();
-    ++m_frame;
-
-    painter->endNativePainting();
-}
-
-QPointF Scene::pixelPosToViewPos(const QPointF& p)
-{
-    return QPointF(2.0 * float(p.x()) / width() - 1.0,
-                   1.0 - 2.0 * float(p.y()) / height());
-}
-
-void Scene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
-{
-    QGraphicsScene::mouseMoveEvent(event);
-    if (event->isAccepted())
-        return;
-
-    if (event->buttons() & Qt::LeftButton) {
-        m_trackBalls[0].move(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugated());
-        event->accept();
-    } else {
-        m_trackBalls[0].release(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugated());
-    }
-
-    if (event->buttons() & Qt::RightButton) {
-        m_trackBalls[1].move(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugated());
-        event->accept();
-    } else {
-        m_trackBalls[1].release(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugated());
-    }
-
-    if (event->buttons() & Qt::MidButton) {
-        m_trackBalls[2].move(pixelPosToViewPos(event->scenePos()), QQuaternion());
-        event->accept();
-    } else {
-        m_trackBalls[2].release(pixelPosToViewPos(event->scenePos()), QQuaternion());
-    }
-}
-
-void Scene::mousePressEvent(QGraphicsSceneMouseEvent *event)
-{
-    QGraphicsScene::mousePressEvent(event);
-    if (event->isAccepted())
-        return;
-
-    if (event->buttons() & Qt::LeftButton) {
-        m_trackBalls[0].push(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugated());
-        event->accept();
-    }
-
-    if (event->buttons() & Qt::RightButton) {
-        m_trackBalls[1].push(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugated());
-        event->accept();
-    }
-
-    if (event->buttons() & Qt::MidButton) {
-        m_trackBalls[2].push(pixelPosToViewPos(event->scenePos()), QQuaternion());
-        event->accept();
-    }
-}
-
-void Scene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
-{
-    QGraphicsScene::mouseReleaseEvent(event);
-    if (event->isAccepted())
-        return;
-
-    if (event->button() == Qt::LeftButton) {
-        m_trackBalls[0].release(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugated());
-        event->accept();
-    }
-
-    if (event->button() == Qt::RightButton) {
-        m_trackBalls[1].release(pixelPosToViewPos(event->scenePos()), m_trackBalls[2].rotation().conjugated());
-        event->accept();
-    }
-
-    if (event->button() == Qt::MidButton) {
-        m_trackBalls[2].release(pixelPosToViewPos(event->scenePos()), QQuaternion());
-        event->accept();
-    }
-}
-
-void Scene::wheelEvent(QGraphicsSceneWheelEvent * event)
-{
-    QGraphicsScene::wheelEvent(event);
-    if (!event->isAccepted()) {
-        m_distExp += event->delta();
-        if (m_distExp < -8 * 120)
-            m_distExp = -8 * 120;
-        if (m_distExp > 10 * 120)
-            m_distExp = 10 * 120;
-        event->accept();
-    }
-}
-
-void Scene::setShader(int index)
-{
-    if (index >= 0 && index < m_fragmentShaders.size())
-        m_currentShader = index;
-}
-
-void Scene::setTexture(int index)
-{
-    if (index >= 0 && index < m_textures.size())
-        m_currentTexture = index;
-}
-
-void Scene::toggleDynamicCubemap(int state)
-{
-    if ((m_dynamicCubemap = (state == Qt::Checked)))
-        m_updateAllCubemaps = true;
-}
-
-void Scene::setColorParameter(const QString &name, QRgb color)
-{
-    // set the color in all programs
-    for (QGLShaderProgram *program : qAsConst(m_programs)) {
-        program->bind();
-        program->setUniformValue(program->uniformLocation(name), QColor(color));
-        program->release();
-    }
-}
-
-void Scene::setFloatParameter(const QString &name, float value)
-{
-    // set the color in all programs
-    for (QGLShaderProgram *program : qAsConst(m_programs)) {
-        program->bind();
-        program->setUniformValue(program->uniformLocation(name), value);
-        program->release();
-    }
-}
-
-void Scene::newItem(ItemDialog::ItemType type)
-{
-    QSize size = sceneRect().size().toSize();
-    switch (type) {
-    case ItemDialog::QtBoxItem:
-        addItem(new QtBox(64, QRandomGenerator::global()->bounded(size.width() - 64) + 32,
-                          QRandomGenerator::global()->bounded(size.height() - 64) + 32));
-        break;
-    case ItemDialog::CircleItem:
-        addItem(new CircleItem(64, QRandomGenerator::global()->bounded(size.width() - 64) + 32,
-                               QRandomGenerator::global()->bounded(size.height() - 64) + 32));
-        break;
-    case ItemDialog::SquareItem:
-        addItem(new SquareItem(64, QRandomGenerator::global()->bounded(size.width() - 64) + 32,
-                               QRandomGenerator::global()->bounded(size.height() - 64) + 32));
-        break;
-    default:
-        break;
-    }
-}
diff --git a/examples/widgets/graphicsview/boxes/scene.h b/examples/widgets/graphicsview/boxes/scene.h
deleted file mode 100644
index 5d65dc71e2..0000000000
--- a/examples/widgets/graphicsview/boxes/scene.h
+++ /dev/null
@@ -1,247 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef SCENE_H
-#define SCENE_H
-
-#include "glbuffers.h"
-#include "glextensions.h"
-#include "gltrianglemesh.h"
-#include "qtbox.h"
-#include "roundedbox.h"
-#include "trackball.h"
-
-QT_BEGIN_NAMESPACE
-class QMatrix4x4;
-QT_END_NAMESPACE
-
-class ParameterEdit : public QWidget
-{
-public:
-    virtual void emitChange() = 0;
-};
-
-class ColorEdit : public ParameterEdit
-{
-    Q_OBJECT
-public:
-    ColorEdit(QRgb initialColor, int id);
-    QRgb color() const {return m_color;}
-    void emitChange() override { emit colorChanged(m_color, m_id); }
-public slots:
-    void editDone();
-signals:
-    void colorChanged(QRgb color, int id);
-protected:
-    void mousePressEvent(QMouseEvent *event) override;
-    void setColor(QRgb color); // also emits colorChanged()
-private:
-    QGraphicsScene *m_dialogParentScene;
-    QLineEdit *m_lineEdit;
-    QFrame *m_button;
-    QRgb m_color;
-    int m_id;
-};
-
-class FloatEdit : public ParameterEdit
-{
-    Q_OBJECT
-public:
-    FloatEdit(float initialValue, int id);
-    float value() const {return m_value;}
-    void emitChange() override { emit valueChanged(m_value, m_id); }
-public slots:
-    void editDone();
-signals:
-    void valueChanged(float value, int id);
-private:
-    QGraphicsScene *m_dialogParentScene;
-    QLineEdit *m_lineEdit;
-    float m_value;
-    int m_id;
-};
-
-class GraphicsWidget : public QGraphicsProxyWidget
-{
-public:
-    GraphicsWidget() : QGraphicsProxyWidget(nullptr, Qt::Window) {}
-protected:
-    QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
-    void resizeEvent(QGraphicsSceneResizeEvent *event) override;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
-};
-
-class TwoSidedGraphicsWidget : public QObject
-{
-    Q_OBJECT
-public:
-    using QObject::QObject;
-    void setWidget(int index, QWidget *widget);
-    QWidget *widget(int index);
-public slots:
-    void flip();
-protected slots:
-    void animateFlip();
-private:
-    GraphicsWidget *m_proxyWidgets[2] = {nullptr, nullptr};
-    int m_current = 0;
-    int m_angle = 0; // angle in degrees
-    int m_delta = 0;
-};
-
-class RenderOptionsDialog : public QDialog
-{
-    Q_OBJECT
-public:
-    RenderOptionsDialog();
-    int addTexture(const QString &name);
-    int addShader(const QString &name);
-    void emitParameterChanged();
-protected slots:
-    void setColorParameter(QRgb color, int id);
-    void setFloatParameter(float value, int id);
-signals:
-    void dynamicCubemapToggled(int);
-    void colorParameterChanged(const QString &, QRgb);
-    void floatParameterChanged(const QString &, float);
-    void textureChanged(int);
-    void shaderChanged(int);
-    void doubleClicked();
-protected:
-    void mouseDoubleClickEvent(QMouseEvent *event) override;
-
-    QVector<QByteArray> m_parameterNames;
-    QComboBox *m_textureCombo;
-    QComboBox *m_shaderCombo;
-    QVector<ParameterEdit *> m_parameterEdits;
-};
-
-class ItemDialog : public QDialog
-{
-    Q_OBJECT
-public:
-    enum ItemType {
-        QtBoxItem,
-        CircleItem,
-        SquareItem,
-    };
-
-    ItemDialog();
-public slots:
-    void triggerNewQtBox();
-    void triggerNewCircleItem();
-    void triggerNewSquareItem();
-signals:
-    void doubleClicked();
-    void newItemTriggered(ItemDialog::ItemType type);
-protected:
-    void mouseDoubleClickEvent(QMouseEvent *event) override;
-};
-
-class Scene : public QGraphicsScene
-{
-    Q_OBJECT
-public:
-    Scene(int width, int height, int maxTextureSize);
-    ~Scene();
-    void drawBackground(QPainter *painter, const QRectF &rect) override;
-
-public slots:
-    void setShader(int index);
-    void setTexture(int index);
-    void toggleDynamicCubemap(int state);
-    void setColorParameter(const QString &name, QRgb color);
-    void setFloatParameter(const QString &name, float value);
-    void newItem(ItemDialog::ItemType type);
-protected:
-    void renderBoxes(const QMatrix4x4 &view, int excludeBox = -2);
-    void setStates();
-    void setLights();
-    void defaultStates();
-    void renderCubemaps();
-
-    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
-    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
-    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
-    void wheelEvent(QGraphicsSceneWheelEvent * event) override;
-private:
-    void initGL();
-    QPointF pixelPosToViewPos(const QPointF& p);
-
-    QTime m_time; // ### Qt 6: remove (unused)
-    int m_lastTime;
-    int m_mouseEventTime;
-    int m_distExp;
-    int m_frame;
-    int m_maxTextureSize;
-
-    int m_currentShader;
-    int m_currentTexture;
-    bool m_dynamicCubemap;
-    bool m_updateAllCubemaps;
-
-    RenderOptionsDialog *m_renderOptions;
-    ItemDialog *m_itemDialog;
-    QTimer *m_timer;
-    GLRoundedBox *m_box;
-    TrackBall m_trackBalls[3];
-    QVector<GLTexture *> m_textures;
-    GLTextureCube *m_environment;
-    GLTexture3D *m_noise;
-    GLRenderTargetCube *m_mainCubemap;
-    QVector<GLRenderTargetCube *> m_cubemaps;
-    QVector<QGLShaderProgram *> m_programs;
-    QGLShader *m_vertexShader;
-    QVector<QGLShader *> m_fragmentShaders;
-    QGLShader *m_environmentShader;
-    QGLShaderProgram *m_environmentProgram;
-};
-
-#endif
diff --git a/examples/widgets/graphicsview/boxes/smiley.png b/examples/widgets/graphicsview/boxes/smiley.png
deleted file mode 100644
index 41cfda6b23..0000000000
--- a/examples/widgets/graphicsview/boxes/smiley.png
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/square.jpg b/examples/widgets/graphicsview/boxes/square.jpg
deleted file mode 100644
index 03f53bd530..0000000000
--- a/examples/widgets/graphicsview/boxes/square.jpg
+++ /dev/null
diff --git a/examples/widgets/graphicsview/boxes/trackball.cpp b/examples/widgets/graphicsview/boxes/trackball.cpp
deleted file mode 100644
index b9dfc1fc7f..0000000000
--- a/examples/widgets/graphicsview/boxes/trackball.cpp
+++ /dev/null
@@ -1,159 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "trackball.h"
-#include "scene.h"
-
-//============================================================================//
-//                                  TrackBall                                 //
-//============================================================================//
-
-TrackBall::TrackBall(TrackMode mode)
-    : TrackBall(0, QVector3D(0, 1, 0), mode)
-{
-}
-
-TrackBall::TrackBall(float angularVelocity, const QVector3D& axis, TrackMode mode)
-    : m_axis(axis)
-    , m_angularVelocity(angularVelocity)
-    , m_mode(mode)
-{}
-
-void TrackBall::push(const QPointF& p, const QQuaternion &)
-{
-    m_rotation = rotation();
-    m_pressed = true;
-    m_lastTime = QTime::currentTime();
-    m_lastPos = p;
-    m_angularVelocity = 0.0f;
-}
-
-void TrackBall::move(const QPointF& p, const QQuaternion &transformation)
-{
-    if (!m_pressed)
-        return;
-
-    QTime currentTime = QTime::currentTime();
-    int msecs = m_lastTime.msecsTo(currentTime);
-    if (msecs <= 20)
-        return;
-
-    switch (m_mode) {
-    case Plane:
-        {
-            QLineF delta(m_lastPos, p);
-            const float angleDelta = qRadiansToDegrees(float(delta.length()));
-            m_angularVelocity = angleDelta / msecs;
-            m_axis = QVector3D(-delta.dy(), delta.dx(), 0.0f).normalized();
-            m_axis = transformation.rotatedVector(m_axis);
-            m_rotation = QQuaternion::fromAxisAndAngle(m_axis, angleDelta) * m_rotation;
-        }
-        break;
-    case Sphere:
-        {
-            QVector3D lastPos3D = QVector3D(m_lastPos.x(), m_lastPos.y(), 0.0f);
-            float sqrZ = 1 - QVector3D::dotProduct(lastPos3D, lastPos3D);
-            if (sqrZ > 0)
-                lastPos3D.setZ(std::sqrt(sqrZ));
-            else
-                lastPos3D.normalize();
-
-            QVector3D currentPos3D = QVector3D(p.x(), p.y(), 0.0f);
-            sqrZ = 1 - QVector3D::dotProduct(currentPos3D, currentPos3D);
-            if (sqrZ > 0)
-                currentPos3D.setZ(std::sqrt(sqrZ));
-            else
-                currentPos3D.normalize();
-
-            m_axis = QVector3D::crossProduct(lastPos3D, currentPos3D);
-            float angle = qRadiansToDegrees(std::asin(m_axis.length()));
-
-            m_angularVelocity = angle / msecs;
-            m_axis.normalize();
-            m_axis = transformation.rotatedVector(m_axis);
-            m_rotation = QQuaternion::fromAxisAndAngle(m_axis, angle) * m_rotation;
-        }
-        break;
-    }
-
-
-    m_lastPos = p;
-    m_lastTime = currentTime;
-}
-
-void TrackBall::release(const QPointF& p, const QQuaternion &transformation)
-{
-    // Calling move() caused the rotation to stop if the framerate was too low.
-    move(p, transformation);
-    m_pressed = false;
-}
-
-void TrackBall::start()
-{
-    m_lastTime = QTime::currentTime();
-    m_paused = false;
-}
-
-void TrackBall::stop()
-{
-    m_rotation = rotation();
-    m_paused = true;
-}
-
-QQuaternion TrackBall::rotation() const
-{
-    if (m_paused || m_pressed)
-        return m_rotation;
-
-    QTime currentTime = QTime::currentTime();
-    float angle = m_angularVelocity * m_lastTime.msecsTo(currentTime);
-    return QQuaternion::fromAxisAndAngle(m_axis, angle) * m_rotation;
-}
-
diff --git a/examples/widgets/graphicsview/boxes/trackball.h b/examples/widgets/graphicsview/boxes/trackball.h
deleted file mode 100644
index af90e4d842..0000000000
--- a/examples/widgets/graphicsview/boxes/trackball.h
+++ /dev/null
@@ -1,87 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef TRACKBALL_H
-#define TRACKBALL_H
-
-#include <QQuaternion>
-#include <QTime>
-#include <QVector3D>
-
-class TrackBall
-{
-public:
-    enum TrackMode
-    {
-        Plane,
-        Sphere,
-    };
-    TrackBall(TrackMode mode = Sphere);
-    TrackBall(float angularVelocity, const QVector3D &axis, TrackMode mode = Sphere);
-    // coordinates in [-1,1]x[-1,1]
-    void push(const QPointF &p, const QQuaternion &transformation);
-    void move(const QPointF &p, const QQuaternion &transformation);
-    void release(const QPointF &p, const QQuaternion &transformation);
-    void start(); // starts clock
-    void stop(); // stops clock
-    QQuaternion rotation() const;
-private:
-    QQuaternion m_rotation;
-    QVector3D m_axis = QVector3D(0, 1, 0);
-    float m_angularVelocity = 0;
-
-    QPointF m_lastPos;
-    QTime m_lastTime = QTime::currentTime();
-    TrackMode m_mode;
-    bool m_paused = false;
-    bool m_pressed = false;
-};
-
-#endif
diff --git a/examples/widgets/graphicsview/boxes/wood.fsh b/examples/widgets/graphicsview/boxes/wood.fsh
deleted file mode 100644
index fbb5195f3a..0000000000
--- a/examples/widgets/graphicsview/boxes/wood.fsh
+++ /dev/null
@@ -1,79 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the demonstration applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-varying vec3 position, normal;
-varying vec4 specular, ambient, diffuse, lightDirection;
-
-uniform sampler2D tex;
-uniform sampler3D noise;
-
-//const vec4 woodColors[2] = {vec4(0.37,0.24,0.20,1), vec4(0.8,0.6,0.4,1)};
-uniform vec4 woodColors[2];
-//const float woodTubulence = 0.1;
-uniform float woodTubulence;
-
-void main()
-{
-    float r = length(gl_TexCoord[1].yz);
-    r += woodTubulence * texture3D(noise, 0.25 * gl_TexCoord[1].xyz).x;
-
-    vec3 N = normalize(normal);
-    // assume directional light
-
-    gl_MaterialParameters M = gl_FrontMaterial;
-
-    float NdotL = dot(N, lightDirection.xyz);
-    float RdotL = dot(reflect(normalize(position), N), lightDirection.xyz);
-
-    float f = fract(16.0 * r);
-    vec4 unlitColor = mix(woodColors[0], woodColors[1], min(1.25 * f, 5.0 - 5.0 * f));
-    gl_FragColor = (ambient + diffuse * max(NdotL, 0.0)) * unlitColor +
-                    M.specular * specular * pow(max(RdotL, 0.0), M.shininess);
-}
diff --git a/examples/widgets/graphicsview/chip/chip.pro b/examples/widgets/graphicsview/chip/chip.pro
index a46f07ce35..508928d026 100644
--- a/examples/widgets/graphicsview/chip/chip.pro
+++ b/examples/widgets/graphicsview/chip/chip.pro
@@ -6,7 +6,6 @@ SOURCES += mainwindow.cpp view.cpp chip.cpp
 
 QT += widgets
 qtHaveModule(printsupport): QT += printsupport
-qtHaveModule(opengl): QT += opengl
 
 build_all:!build_pass {
     CONFIG -= build_all
diff --git a/examples/widgets/graphicsview/chip/view.cpp b/examples/widgets/graphicsview/chip/view.cpp
index 21998dc2df..77a6310778 100644
--- a/examples/widgets/graphicsview/chip/view.cpp
+++ b/examples/widgets/graphicsview/chip/view.cpp
@@ -57,11 +57,7 @@
 #include <QPrintDialog>
 #endif
 #endif
-#ifndef QT_NO_OPENGL
-#include <QtOpenGL>
-#else
 #include <QtWidgets>
-#endif
 #include <QtMath>
 
 #if QT_CONFIG(wheelevent)
@@ -156,14 +152,6 @@ View::View(const QString &name, QWidget *parent)
     antialiasButton->setText(tr("Antialiasing"));
     antialiasButton->setCheckable(true);
     antialiasButton->setChecked(false);
-    openGlButton = new QToolButton;
-    openGlButton->setText(tr("OpenGL"));
-    openGlButton->setCheckable(true);
-#ifndef QT_NO_OPENGL
-    openGlButton->setEnabled(QGLFormat::hasOpenGL());
-#else
-    openGlButton->setEnabled(false);
-#endif
     printButton = new QToolButton;
     printButton->setIcon(QIcon(QPixmap(":/fileprint.png")));
 
@@ -179,7 +167,6 @@ View::View(const QString &name, QWidget *parent)
     labelLayout->addWidget(dragModeButton);
     labelLayout->addStretch();
     labelLayout->addWidget(antialiasButton);
-    labelLayout->addWidget(openGlButton);
     labelLayout->addWidget(printButton);
 
     QGridLayout *topLayout = new QGridLayout;
@@ -200,7 +187,6 @@ View::View(const QString &name, QWidget *parent)
     connect(selectModeButton, &QAbstractButton::toggled, this, &View::togglePointerMode);
     connect(dragModeButton, &QAbstractButton::toggled, this, &View::togglePointerMode);
     connect(antialiasButton, &QAbstractButton::toggled, this, &View::toggleAntialiasing);
-    connect(openGlButton, &QAbstractButton::toggled, this, &View::toggleOpenGL);
     connect(rotateLeftIcon, &QAbstractButton::clicked, this, &View::rotateLeft);
     connect(rotateRightIcon, &QAbstractButton::clicked, this, &View::rotateRight);
     connect(zoomInIcon, &QAbstractButton::clicked, this, &View::zoomIn);
@@ -250,13 +236,6 @@ void View::togglePointerMode()
     graphicsView->setInteractive(selectModeButton->isChecked());
 }
 
-void View::toggleOpenGL()
-{
-#ifndef QT_NO_OPENGL
-    graphicsView->setViewport(openGlButton->isChecked() ? new QGLWidget(QGLFormat(QGL::SampleBuffers)) : new QWidget);
-#endif
-}
-
 void View::toggleAntialiasing()
 {
     graphicsView->setRenderHint(QPainter::Antialiasing, antialiasButton->isChecked());
diff --git a/examples/widgets/graphicsview/chip/view.h b/examples/widgets/graphicsview/chip/view.h
index ea7bd414f5..b780702c34 100644
--- a/examples/widgets/graphicsview/chip/view.h
+++ b/examples/widgets/graphicsview/chip/view.h
@@ -94,7 +94,6 @@ private slots:
     void setResetButtonEnabled();
     void setupMatrix();
     void togglePointerMode();
-    void toggleOpenGL();
     void toggleAntialiasing();
     void print();
     void rotateLeft();
@@ -106,7 +105,6 @@ private:
     QLabel *label2;
     QToolButton *selectModeButton;
     QToolButton *dragModeButton;
-    QToolButton *openGlButton;
     QToolButton *antialiasButton;
     QToolButton *printButton;
     QToolButton *resetButton;
diff --git a/examples/widgets/graphicsview/graphicsview.pro b/examples/widgets/graphicsview/graphicsview.pro
index b9bef70a0e..d591450559 100644
--- a/examples/widgets/graphicsview/graphicsview.pro
+++ b/examples/widgets/graphicsview/graphicsview.pro
@@ -14,7 +14,3 @@ SUBDIRS       = \
               weatheranchorlayout
 
 contains(DEFINES, QT_NO_CURSOR)|!qtConfig(draganddrop): SUBDIRS -= dragdroprobot
-
-qtHaveModule(opengl):!qtConfig(opengles.):!qtConfig(dynamicgl) {
-    SUBDIRS += boxes
-}