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Diffstat (limited to 'examples/opengl/legacy/hellogl/glwidget.cpp')
| -rw-r--r-- | examples/opengl/legacy/hellogl/glwidget.cpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/examples/opengl/legacy/hellogl/glwidget.cpp b/examples/opengl/legacy/hellogl/glwidget.cpp new file mode 100644 index 0000000000..3a9faaca5f --- /dev/null +++ b/examples/opengl/legacy/hellogl/glwidget.cpp @@ -0,0 +1,199 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the 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 Digia Plc and its Subsidiary(-ies) 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 <QtWidgets> +#include <QtOpenGL> + +#include <math.h> + +#include "glwidget.h" +#include "qtlogo.h" + +#ifndef GL_MULTISAMPLE +#define GL_MULTISAMPLE 0x809D +#endif + +//! [0] +GLWidget::GLWidget(QWidget *parent) + : QGLWidget(QGLFormat(QGL::SampleBuffers), parent) +{ + logo = 0; + xRot = 0; + yRot = 0; + zRot = 0; + + qtGreen = QColor::fromCmykF(0.40, 0.0, 1.0, 0.0); + qtPurple = QColor::fromCmykF(0.39, 0.39, 0.0, 0.0); +} +//! [0] + +//! [1] +GLWidget::~GLWidget() +{ +} +//! [1] + +//! [2] +QSize GLWidget::minimumSizeHint() const +{ + return QSize(50, 50); +} +//! [2] + +//! [3] +QSize GLWidget::sizeHint() const +//! [3] //! [4] +{ + return QSize(400, 400); +} +//! [4] + +static void qNormalizeAngle(int &angle) +{ + while (angle < 0) + angle += 360 * 16; + while (angle > 360 * 16) + angle -= 360 * 16; +} + +//! [5] +void GLWidget::setXRotation(int angle) +{ + qNormalizeAngle(angle); + if (angle != xRot) { + xRot = angle; + emit xRotationChanged(angle); + update(); + } +} +//! [5] + +void GLWidget::setYRotation(int angle) +{ + qNormalizeAngle(angle); + if (angle != yRot) { + yRot = angle; + emit yRotationChanged(angle); + update(); + } +} + +void GLWidget::setZRotation(int angle) +{ + qNormalizeAngle(angle); + if (angle != zRot) { + zRot = angle; + emit zRotationChanged(angle); + update(); + } +} + +//! [6] +void GLWidget::initializeGL() +{ + qglClearColor(qtPurple.dark()); + + logo = new QtLogo(this, 64); + logo->setColor(qtGreen.dark()); + + glEnable(GL_DEPTH_TEST); + glEnable(GL_CULL_FACE); + glShadeModel(GL_SMOOTH); + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + glEnable(GL_MULTISAMPLE); + static GLfloat lightPosition[4] = { 0.5, 5.0, 7.0, 1.0 }; + glLightfv(GL_LIGHT0, GL_POSITION, lightPosition); +} +//! [6] + +//! [7] +void GLWidget::paintGL() +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + glLoadIdentity(); + glTranslatef(0.0, 0.0, -10.0); + glRotatef(xRot / 16.0, 1.0, 0.0, 0.0); + glRotatef(yRot / 16.0, 0.0, 1.0, 0.0); + glRotatef(zRot / 16.0, 0.0, 0.0, 1.0); + logo->draw(); +} +//! [7] + +//! [8] +void GLWidget::resizeGL(int width, int height) +{ + int side = qMin(width, height); + glViewport((width - side) / 2, (height - side) / 2, side, side); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); +#ifdef QT_OPENGL_ES_1 + glOrthof(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0); +#else + glOrtho(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0); +#endif + glMatrixMode(GL_MODELVIEW); +} +//! [8] + +//! [9] +void GLWidget::mousePressEvent(QMouseEvent *event) +{ + lastPos = event->pos(); +} +//! [9] + +//! [10] +void GLWidget::mouseMoveEvent(QMouseEvent *event) +{ + int dx = event->x() - lastPos.x(); + int dy = event->y() - lastPos.y(); + + if (event->buttons() & Qt::LeftButton) { + setXRotation(xRot + 8 * dy); + setYRotation(yRot + 8 * dx); + } else if (event->buttons() & Qt::RightButton) { + setXRotation(xRot + 8 * dy); + setZRotation(zRot + 8 * dx); + } + lastPos = event->pos(); +} +//! [10] |