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diff --git a/examples/opengl/hellogl.py b/examples/opengl/hellogl.py
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+#!/usr/bin/env python
+
+############################################################################
+##
+## Copyright (C) 2013 Riverbank Computing Limited.
+## Copyright (C) 2016 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the PySide examples of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:BSD$
+## 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."
+##
+## $QT_END_LICENSE$
+##
+############################################################################
+
+"""PySide2 port of the opengl/legacy/hellogl example from Qt v5.x"""
+
+import sys
+import math
+from PySide2 import QtCore, QtGui, QtWidgets, QtOpenGL
+
+try:
+ from OpenGL import GL
+except ImportError:
+ app = QtWidgets.QApplication(sys.argv)
+ messageBox = QtWidgets.QMessageBox(QtWidgets.QMessageBox.Critical, "OpenGL hellogl",
+ "PyOpenGL must be installed to run this example.",
+ QtWidgets.QMessageBox.Close)
+ messageBox.setDetailedText("Run:\npip install PyOpenGL PyOpenGL_accelerate")
+ messageBox.exec_()
+ sys.exit(1)
+
+
+class Window(QtWidgets.QWidget):
+ def __init__(self, parent=None):
+ QtWidgets.QWidget.__init__(self, parent)
+
+ self.glWidget = GLWidget()
+
+ self.xSlider = self.createSlider(QtCore.SIGNAL("xRotationChanged(int)"),
+ self.glWidget.setXRotation)
+ self.ySlider = self.createSlider(QtCore.SIGNAL("yRotationChanged(int)"),
+ self.glWidget.setYRotation)
+ self.zSlider = self.createSlider(QtCore.SIGNAL("zRotationChanged(int)"),
+ self.glWidget.setZRotation)
+
+ mainLayout = QtWidgets.QHBoxLayout()
+ mainLayout.addWidget(self.glWidget)
+ mainLayout.addWidget(self.xSlider)
+ mainLayout.addWidget(self.ySlider)
+ mainLayout.addWidget(self.zSlider)
+ self.setLayout(mainLayout)
+
+ self.xSlider.setValue(170 * 16)
+ self.ySlider.setValue(160 * 16)
+ self.zSlider.setValue(90 * 16)
+
+ self.setWindowTitle(self.tr("Hello GL"))
+
+ def createSlider(self, changedSignal, setterSlot):
+ slider = QtWidgets.QSlider(QtCore.Qt.Vertical)
+
+ slider.setRange(0, 360 * 16)
+ slider.setSingleStep(16)
+ slider.setPageStep(15 * 16)
+ slider.setTickInterval(15 * 16)
+ slider.setTickPosition(QtWidgets.QSlider.TicksRight)
+
+ self.glWidget.connect(slider, QtCore.SIGNAL("valueChanged(int)"), setterSlot)
+ self.connect(self.glWidget, changedSignal, slider, QtCore.SLOT("setValue(int)"))
+
+ return slider
+
+
+class GLWidget(QtOpenGL.QGLWidget):
+ xRotationChanged = QtCore.Signal(int)
+ yRotationChanged = QtCore.Signal(int)
+ zRotationChanged = QtCore.Signal(int)
+
+ def __init__(self, parent=None):
+ QtOpenGL.QGLWidget.__init__(self, parent)
+
+ self.object = 0
+ self.xRot = 0
+ self.yRot = 0
+ self.zRot = 0
+
+ self.lastPos = QtCore.QPoint()
+
+ self.trolltechGreen = QtGui.QColor.fromCmykF(0.40, 0.0, 1.0, 0.0)
+ self.trolltechPurple = QtGui.QColor.fromCmykF(0.39, 0.39, 0.0, 0.0)
+
+ def xRotation(self):
+ return self.xRot
+
+ def yRotation(self):
+ return self.yRot
+
+ def zRotation(self):
+ return self.zRot
+
+ def minimumSizeHint(self):
+ return QtCore.QSize(50, 50)
+
+ def sizeHint(self):
+ return QtCore.QSize(400, 400)
+
+ def setXRotation(self, angle):
+ angle = self.normalizeAngle(angle)
+ if angle != self.xRot:
+ self.xRot = angle
+ self.emit(QtCore.SIGNAL("xRotationChanged(int)"), angle)
+ self.updateGL()
+
+ def setYRotation(self, angle):
+ angle = self.normalizeAngle(angle)
+ if angle != self.yRot:
+ self.yRot = angle
+ self.emit(QtCore.SIGNAL("yRotationChanged(int)"), angle)
+ self.updateGL()
+
+ def setZRotation(self, angle):
+ angle = self.normalizeAngle(angle)
+ if angle != self.zRot:
+ self.zRot = angle
+ self.emit(QtCore.SIGNAL("zRotationChanged(int)"), angle)
+ self.updateGL()
+
+ def initializeGL(self):
+ self.qglClearColor(self.trolltechPurple.darker())
+ self.object = self.makeObject()
+ GL.glShadeModel(GL.GL_FLAT)
+ GL.glEnable(GL.GL_DEPTH_TEST)
+ GL.glEnable(GL.GL_CULL_FACE)
+
+ def paintGL(self):
+ GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
+ GL.glLoadIdentity()
+ GL.glTranslated(0.0, 0.0, -10.0)
+ GL.glRotated(self.xRot / 16.0, 1.0, 0.0, 0.0)
+ GL.glRotated(self.yRot / 16.0, 0.0, 1.0, 0.0)
+ GL.glRotated(self.zRot / 16.0, 0.0, 0.0, 1.0)
+ GL.glCallList(self.object)
+
+ def resizeGL(self, width, height):
+ side = min(width, height)
+ GL.glViewport(int((width - side) / 2),int((height - side) / 2), side, side)
+
+ GL.glMatrixMode(GL.GL_PROJECTION)
+ GL.glLoadIdentity()
+ GL.glOrtho(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0)
+ GL.glMatrixMode(GL.GL_MODELVIEW)
+
+ def mousePressEvent(self, event):
+ self.lastPos = QtCore.QPoint(event.pos())
+
+ def mouseMoveEvent(self, event):
+ dx = event.x() - self.lastPos.x()
+ dy = event.y() - self.lastPos.y()
+
+ if event.buttons() & QtCore.Qt.LeftButton:
+ self.setXRotation(self.xRot + 8 * dy)
+ self.setYRotation(self.yRot + 8 * dx)
+ elif event.buttons() & QtCore.Qt.RightButton:
+ self.setXRotation(self.xRot + 8 * dy)
+ self.setZRotation(self.zRot + 8 * dx)
+
+ self.lastPos = QtCore.QPoint(event.pos())
+
+ def makeObject(self):
+ genList = GL.glGenLists(1)
+ GL.glNewList(genList, GL.GL_COMPILE)
+
+ GL.glBegin(GL.GL_QUADS)
+
+ x1 = +0.06
+ y1 = -0.14
+ x2 = +0.14
+ y2 = -0.06
+ x3 = +0.08
+ y3 = +0.00
+ x4 = +0.30
+ y4 = +0.22
+
+ self.quad(x1, y1, x2, y2, y2, x2, y1, x1)
+ self.quad(x3, y3, x4, y4, y4, x4, y3, x3)
+
+ self.extrude(x1, y1, x2, y2)
+ self.extrude(x2, y2, y2, x2)
+ self.extrude(y2, x2, y1, x1)
+ self.extrude(y1, x1, x1, y1)
+ self.extrude(x3, y3, x4, y4)
+ self.extrude(x4, y4, y4, x4)
+ self.extrude(y4, x4, y3, x3)
+
+ Pi = 3.14159265358979323846
+ NumSectors = 200
+
+ for i in range(NumSectors):
+ angle1 = (i * 2 * Pi) / NumSectors
+ x5 = 0.30 * math.sin(angle1)
+ y5 = 0.30 * math.cos(angle1)
+ x6 = 0.20 * math.sin(angle1)
+ y6 = 0.20 * math.cos(angle1)
+
+ angle2 = ((i + 1) * 2 * Pi) / NumSectors
+ x7 = 0.20 * math.sin(angle2)
+ y7 = 0.20 * math.cos(angle2)
+ x8 = 0.30 * math.sin(angle2)
+ y8 = 0.30 * math.cos(angle2)
+
+ self.quad(x5, y5, x6, y6, x7, y7, x8, y8)
+
+ self.extrude(x6, y6, x7, y7)
+ self.extrude(x8, y8, x5, y5)
+
+ GL.glEnd()
+ GL.glEndList()
+
+ return genList
+
+ def quad(self, x1, y1, x2, y2, x3, y3, x4, y4):
+ self.qglColor(self.trolltechGreen)
+
+ GL.glVertex3d(x1, y1, +0.05)
+ GL.glVertex3d(x2, y2, +0.05)
+ GL.glVertex3d(x3, y3, +0.05)
+ GL.glVertex3d(x4, y4, +0.05)
+
+ GL.glVertex3d(x4, y4, -0.05)
+ GL.glVertex3d(x3, y3, -0.05)
+ GL.glVertex3d(x2, y2, -0.05)
+ GL.glVertex3d(x1, y1, -0.05)
+
+ def extrude(self, x1, y1, x2, y2):
+ self.qglColor(self.trolltechGreen.darker(250 + int(100 * x1)))
+
+ GL.glVertex3d(x1, y1, -0.05)
+ GL.glVertex3d(x2, y2, -0.05)
+ GL.glVertex3d(x2, y2, +0.05)
+ GL.glVertex3d(x1, y1, +0.05)
+
+ def normalizeAngle(self, angle):
+ while angle < 0:
+ angle += 360 * 16
+ while angle > 360 * 16:
+ angle -= 360 * 16
+ return angle
+
+ def freeResources(self):
+ self.makeCurrent()
+ GL.glDeleteLists(self.object, 1)
+
+if __name__ == '__main__':
+ app = QtWidgets.QApplication(sys.argv)
+ window = Window()
+ window.show()
+ res = app.exec_()
+ window.glWidget.freeResources()
+ sys.exit(res)
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