Long live Qt!

6 files changed, 748 insertions, 0 deletions

diff --git a/examples/opengl/grabber/glwidget.cpp b/examples/opengl/grabber/glwidget.cpp
new file mode 100644
index 0000000..71550ac
--- /dev/null
+++ b/examples/opengl/grabber/glwidget.cpp
@@ -0,0 +1,284 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtOpenGL>
+
+#include <math.h>
+
+#include "glwidget.h"
+
+GLWidget::GLWidget(QWidget *parent)
+    : QGLWidget(parent)
+{
+    gear1 = 0;
+    gear2 = 0;
+    gear3 = 0;
+    xRot = 0;
+    yRot = 0;
+    zRot = 0;
+    gear1Rot = 0;
+
+    QTimer *timer = new QTimer(this);
+    connect(timer, SIGNAL(timeout()), this, SLOT(advanceGears()));
+    timer->start(20);
+}
+
+GLWidget::~GLWidget()
+{
+    makeCurrent();
+    glDeleteLists(gear1, 1);
+    glDeleteLists(gear2, 1);
+    glDeleteLists(gear3, 1);
+}
+
+void GLWidget::setXRotation(int angle)
+{
+    normalizeAngle(&angle);
+    if (angle != xRot) {
+        xRot = angle;
+        emit xRotationChanged(angle);
+        updateGL();
+    }
+}
+
+void GLWidget::setYRotation(int angle)
+{
+    normalizeAngle(&angle);
+    if (angle != yRot) {
+        yRot = angle;
+        emit yRotationChanged(angle);
+        updateGL();
+    }
+}
+
+void GLWidget::setZRotation(int angle)
+{
+    normalizeAngle(&angle);
+    if (angle != zRot) {
+        zRot = angle;
+        emit zRotationChanged(angle);
+        updateGL();
+    }
+}
+
+void GLWidget::initializeGL()
+{
+    static const GLfloat lightPos[4] = { 5.0f, 5.0f, 10.0f, 1.0f };
+    static const GLfloat reflectance1[4] = { 0.8f, 0.1f, 0.0f, 1.0f };
+    static const GLfloat reflectance2[4] = { 0.0f, 0.8f, 0.2f, 1.0f };
+    static const GLfloat reflectance3[4] = { 0.2f, 0.2f, 1.0f, 1.0f };
+
+    glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+    glEnable(GL_DEPTH_TEST);
+
+    gear1 = makeGear(reflectance1, 1.0, 4.0, 1.0, 0.7, 20);
+    gear2 = makeGear(reflectance2, 0.5, 2.0, 2.0, 0.7, 10);
+    gear3 = makeGear(reflectance3, 1.3, 2.0, 0.5, 0.7, 10);
+
+    glEnable(GL_NORMALIZE);
+    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);    
+}
+
+void GLWidget::paintGL()
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    glPushMatrix();
+    glRotated(xRot / 16.0, 1.0, 0.0, 0.0);
+    glRotated(yRot / 16.0, 0.0, 1.0, 0.0);
+    glRotated(zRot / 16.0, 0.0, 0.0, 1.0);
+
+    drawGear(gear1, -3.0, -2.0, 0.0, gear1Rot / 16.0);
+    drawGear(gear2, +3.1, -2.0, 0.0, -2.0 * (gear1Rot / 16.0) - 9.0);
+
+    glRotated(+90.0, 1.0, 0.0, 0.0);
+    drawGear(gear3, -3.1, -1.8, -2.2, +2.0 * (gear1Rot / 16.0) - 2.0);
+
+    glPopMatrix();
+}
+
+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();
+    glFrustum(-1.0, +1.0, -1.0, 1.0, 5.0, 60.0);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    glTranslated(0.0, 0.0, -40.0);
+}
+
+void GLWidget::mousePressEvent(QMouseEvent *event)
+{
+    lastPos = event->pos();
+}
+
+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();
+}
+
+void GLWidget::advanceGears()
+{
+    gear1Rot += 2 * 16;
+    updateGL();
+}
+
+GLuint GLWidget::makeGear(const GLfloat *reflectance, GLdouble innerRadius,
+                          GLdouble outerRadius, GLdouble thickness,
+                          GLdouble toothSize, GLint toothCount)
+{
+    const double Pi = 3.14159265358979323846;
+
+    GLuint list = glGenLists(1);
+    glNewList(list, GL_COMPILE);
+    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, reflectance);
+
+    GLdouble r0 = innerRadius;
+    GLdouble r1 = outerRadius - toothSize / 2.0;
+    GLdouble r2 = outerRadius + toothSize / 2.0;
+    GLdouble delta = (2.0 * Pi / toothCount) / 4.0;
+    GLdouble z = thickness / 2.0;
+    int i, j;
+
+    glShadeModel(GL_FLAT);
+
+    for (i = 0; i < 2; ++i) {
+        GLdouble sign = (i == 0) ? +1.0 : -1.0;
+
+        glNormal3d(0.0, 0.0, sign);
+
+        glBegin(GL_QUAD_STRIP);
+        for (j = 0; j <= toothCount; ++j) {
+            GLdouble angle = 2.0 * Pi * j / toothCount;
+	    glVertex3d(r0 * cos(angle), r0 * sin(angle), sign * z);
+	    glVertex3d(r1 * cos(angle), r1 * sin(angle), sign * z);
+	    glVertex3d(r0 * cos(angle), r0 * sin(angle), sign * z);
+	    glVertex3d(r1 * cos(angle + 3 * delta), r1 * sin(angle + 3 * delta),
+                       sign * z);
+        }
+        glEnd();
+
+        glBegin(GL_QUADS);
+        for (j = 0; j < toothCount; ++j) {
+            GLdouble angle = 2.0 * Pi * j / toothCount;
+	    glVertex3d(r1 * cos(angle), r1 * sin(angle), sign * z);
+	    glVertex3d(r2 * cos(angle + delta), r2 * sin(angle + delta),
+                       sign * z);
+	    glVertex3d(r2 * cos(angle + 2 * delta), r2 * sin(angle + 2 * delta),
+                       sign * z);
+	    glVertex3d(r1 * cos(angle + 3 * delta), r1 * sin(angle + 3 * delta),
+                       sign * z);
+        }
+        glEnd();
+    }
+
+    glBegin(GL_QUAD_STRIP);
+    for (i = 0; i < toothCount; ++i) {
+        for (j = 0; j < 2; ++j) {
+            GLdouble angle = 2.0 * Pi * (i + (j / 2.0)) / toothCount;
+            GLdouble s1 = r1;
+            GLdouble s2 = r2;
+            if (j == 1)
+                qSwap(s1, s2);
+
+	    glNormal3d(cos(angle), sin(angle), 0.0);
+	    glVertex3d(s1 * cos(angle), s1 * sin(angle), +z);
+	    glVertex3d(s1 * cos(angle), s1 * sin(angle), -z);
+
+	    glNormal3d(s2 * sin(angle + delta) - s1 * sin(angle),
+                       s1 * cos(angle) - s2 * cos(angle + delta), 0.0);
+	    glVertex3d(s2 * cos(angle + delta), s2 * sin(angle + delta), +z);
+	    glVertex3d(s2 * cos(angle + delta), s2 * sin(angle + delta), -z);
+        }
+    }
+    glVertex3d(r1, 0.0, +z);
+    glVertex3d(r1, 0.0, -z);
+    glEnd();
+
+    glShadeModel(GL_SMOOTH);
+
+    glBegin(GL_QUAD_STRIP);
+    for (i = 0; i <= toothCount; ++i) {
+	GLdouble angle = i * 2.0 * Pi / toothCount;
+	glNormal3d(-cos(angle), -sin(angle), 0.0);
+	glVertex3d(r0 * cos(angle), r0 * sin(angle), +z);
+	glVertex3d(r0 * cos(angle), r0 * sin(angle), -z);
+    }
+    glEnd();
+
+    glEndList();
+
+    return list;
+}
+
+void GLWidget::drawGear(GLuint gear, GLdouble dx, GLdouble dy, GLdouble dz,
+                        GLdouble angle)
+{
+    glPushMatrix();
+    glTranslated(dx, dy, dz);
+    glRotated(angle, 0.0, 0.0, 1.0);
+    glCallList(gear);
+    glPopMatrix();
+}
+
+void GLWidget::normalizeAngle(int *angle)
+{
+    while (*angle < 0)
+        *angle += 360 * 16;
+    while (*angle > 360 * 16)
+        *angle -= 360 * 16;
+}
diff --git a/examples/opengl/grabber/glwidget.h b/examples/opengl/grabber/glwidget.h
new file mode 100644
index 0000000..4e66b1f
--- /dev/null
+++ b/examples/opengl/grabber/glwidget.h
@@ -0,0 +1,98 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef GLWIDGET_H
+#define GLWIDGET_H
+
+#include <QGLWidget>
+
+class GLWidget : public QGLWidget
+{
+    Q_OBJECT
+
+public:
+    GLWidget(QWidget *parent = 0);
+    ~GLWidget();
+
+    int xRotation() const { return xRot; }
+    int yRotation() const { return yRot; }
+    int zRotation() const { return zRot; }
+
+public slots:
+    void setXRotation(int angle);
+    void setYRotation(int angle);
+    void setZRotation(int angle);
+
+signals:
+    void xRotationChanged(int angle);
+    void yRotationChanged(int angle);
+    void zRotationChanged(int angle);
+
+protected:
+    void initializeGL();
+    void paintGL();
+    void resizeGL(int width, int height);
+    void mousePressEvent(QMouseEvent *event);
+    void mouseMoveEvent(QMouseEvent *event);
+
+private slots:
+    void advanceGears();
+
+private:
+    GLuint makeGear(const GLfloat *reflectance, GLdouble innerRadius,
+                    GLdouble outerRadius, GLdouble thickness,
+                    GLdouble toothSize, GLint toothCount);
+    void drawGear(GLuint gear, GLdouble dx, GLdouble dy, GLdouble dz,
+                  GLdouble angle);
+    void normalizeAngle(int *angle);
+
+    GLuint gear1;
+    GLuint gear2;
+    GLuint gear3;
+    int xRot;
+    int yRot;
+    int zRot;
+    int gear1Rot;
+    
+    QPoint lastPos;
+};
+
+#endif
diff --git a/examples/opengl/grabber/grabber.pro b/examples/opengl/grabber/grabber.pro
new file mode 100644
index 0000000..15eaf02
--- /dev/null
+++ b/examples/opengl/grabber/grabber.pro
@@ -0,0 +1,12 @@
+HEADERS       = glwidget.h \
+                mainwindow.h
+SOURCES       = glwidget.cpp \
+                main.cpp \
+                mainwindow.cpp
+QT           += opengl
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/opengl/grabber
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS grabber.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/opengl/grabber
+INSTALLS += target sources
diff --git a/examples/opengl/grabber/main.cpp b/examples/opengl/grabber/main.cpp
new file mode 100644
index 0000000..4856752
--- /dev/null
+++ b/examples/opengl/grabber/main.cpp
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QApplication>
+
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    MainWindow mainWin;
+    mainWin.show();
+    return app.exec();
+}
diff --git a/examples/opengl/grabber/mainwindow.cpp b/examples/opengl/grabber/mainwindow.cpp
new file mode 100644
index 0000000..7e878f9
--- /dev/null
+++ b/examples/opengl/grabber/mainwindow.cpp
@@ -0,0 +1,207 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtOpenGL>
+
+#include "glwidget.h"
+#include "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+    centralWidget = new QWidget;
+    setCentralWidget(centralWidget);
+
+    glWidget = new GLWidget;
+    pixmapLabel = new QLabel;
+
+    glWidgetArea = new QScrollArea;
+    glWidgetArea->setWidget(glWidget);
+    glWidgetArea->setWidgetResizable(true);
+    glWidgetArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    glWidgetArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    glWidgetArea->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
+    glWidgetArea->setMinimumSize(50, 50);
+
+    pixmapLabelArea = new QScrollArea;
+    pixmapLabelArea->setWidget(pixmapLabel);
+    pixmapLabelArea->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
+    pixmapLabelArea->setMinimumSize(50, 50);
+
+    xSlider = createSlider(SIGNAL(xRotationChanged(int)),
+                           SLOT(setXRotation(int)));
+    ySlider = createSlider(SIGNAL(yRotationChanged(int)),
+                           SLOT(setYRotation(int)));
+    zSlider = createSlider(SIGNAL(zRotationChanged(int)),
+                           SLOT(setZRotation(int)));
+
+    createActions();
+    createMenus();
+
+    QGridLayout *centralLayout = new QGridLayout;
+    centralLayout->addWidget(glWidgetArea, 0, 0);
+    centralLayout->addWidget(pixmapLabelArea, 0, 1);
+    centralLayout->addWidget(xSlider, 1, 0, 1, 2);
+    centralLayout->addWidget(ySlider, 2, 0, 1, 2);
+    centralLayout->addWidget(zSlider, 3, 0, 1, 2);
+    centralWidget->setLayout(centralLayout);
+
+    xSlider->setValue(15 * 16);
+    ySlider->setValue(345 * 16);
+    zSlider->setValue(0 * 16);
+
+    setWindowTitle(tr("Grabber"));
+    resize(400, 300);
+}
+
+void MainWindow::renderIntoPixmap()
+{
+    QSize size = getSize();
+    if (size.isValid()) {
+        QPixmap pixmap = glWidget->renderPixmap(size.width(), size.height());
+        setPixmap(pixmap);
+    }
+}
+
+void MainWindow::grabFrameBuffer()
+{
+    QImage image = glWidget->grabFrameBuffer();
+    setPixmap(QPixmap::fromImage(image));
+}
+
+void MainWindow::clearPixmap()
+{
+    setPixmap(QPixmap());
+}
+
+void MainWindow::about()
+{
+    QMessageBox::about(this, tr("About Grabber"),
+            tr("The <b>Grabber</b> example demonstrates two approaches for "
+               "rendering OpenGL into a Qt pixmap."));
+}
+
+void MainWindow::createActions()
+{
+    renderIntoPixmapAct = new QAction(tr("&Render into Pixmap..."), this);
+    renderIntoPixmapAct->setShortcut(tr("Ctrl+R"));
+    connect(renderIntoPixmapAct, SIGNAL(triggered()),
+            this, SLOT(renderIntoPixmap()));
+
+    grabFrameBufferAct = new QAction(tr("&Grab Frame Buffer"), this);
+    grabFrameBufferAct->setShortcut(tr("Ctrl+G"));
+    connect(grabFrameBufferAct, SIGNAL(triggered()),
+            this, SLOT(grabFrameBuffer()));
+
+    clearPixmapAct = new QAction(tr("&Clear Pixmap"), this);
+    clearPixmapAct->setShortcut(tr("Ctrl+L"));
+    connect(clearPixmapAct, SIGNAL(triggered()), this, SLOT(clearPixmap()));
+
+    exitAct = new QAction(tr("E&xit"), this);
+    exitAct->setShortcut(tr("Ctrl+Q"));
+    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+    aboutAct = new QAction(tr("&About"), this);
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(renderIntoPixmapAct);
+    fileMenu->addAction(grabFrameBufferAct);
+    fileMenu->addAction(clearPixmapAct);
+    fileMenu->addSeparator();
+    fileMenu->addAction(exitAct);
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+
+QSlider *MainWindow::createSlider(const char *changedSignal,
+                                  const char *setterSlot)
+{
+    QSlider *slider = new QSlider(Qt::Horizontal);
+    slider->setRange(0, 360 * 16);
+    slider->setSingleStep(16);
+    slider->setPageStep(15 * 16);
+    slider->setTickInterval(15 * 16);
+    slider->setTickPosition(QSlider::TicksRight);
+    connect(slider, SIGNAL(valueChanged(int)), glWidget, setterSlot);
+    connect(glWidget, changedSignal, slider, SLOT(setValue(int)));
+    return slider;
+}
+
+void MainWindow::setPixmap(const QPixmap &pixmap)
+{
+    pixmapLabel->setPixmap(pixmap);
+    QSize size = pixmap.size();
+    if (size - QSize(1, 0) == pixmapLabelArea->maximumViewportSize())
+        size -= QSize(1, 0);
+    pixmapLabel->resize(size);
+}
+
+QSize MainWindow::getSize()
+{
+    bool ok;
+    QString text = QInputDialog::getText(this, tr("Grabber"),
+                                         tr("Enter pixmap size:"),
+                                         QLineEdit::Normal,
+                                         tr("%1 x %2").arg(glWidget->width())
+                                                      .arg(glWidget->height()),
+                                         &ok);
+    if (!ok)
+        return QSize();
+
+    QRegExp regExp(tr("([0-9]+) *x *([0-9]+)"));
+    if (regExp.exactMatch(text)) {
+        int width = regExp.cap(1).toInt();
+        int height = regExp.cap(2).toInt();
+        if (width > 0 && width < 2048 && height > 0 && height < 2048)
+            return QSize(width, height);
+    }
+
+    return glWidget->size();
+}
diff --git a/examples/opengl/grabber/mainwindow.h b/examples/opengl/grabber/mainwindow.h
new file mode 100644
index 0000000..8f77747
--- /dev/null
+++ b/examples/opengl/grabber/mainwindow.h
@@ -0,0 +1,95 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QLabel;
+class QMenu;
+class QScrollArea;
+class QSlider;
+QT_END_NAMESPACE
+class GLWidget;
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+private slots:
+    void renderIntoPixmap();
+    void grabFrameBuffer();
+    void clearPixmap();
+    void about();
+
+private:
+    void createActions();
+    void createMenus();
+    QSlider *createSlider(const char *changedSignal, const char *setterSlot);
+    void setPixmap(const QPixmap &pixmap);
+    QSize getSize();
+
+    QWidget *centralWidget;
+    QScrollArea *glWidgetArea;
+    QScrollArea *pixmapLabelArea;
+    GLWidget *glWidget;
+    QLabel *pixmapLabel;
+    QSlider *xSlider;
+    QSlider *ySlider;
+    QSlider *zSlider;
+
+    QMenu *fileMenu;
+    QMenu *helpMenu;
+    QAction *grabFrameBufferAct;
+    QAction *renderIntoPixmapAct;
+    QAction *clearPixmapAct;
+    QAction *exitAct;
+    QAction *aboutAct;
+    QAction *aboutQtAct;
+};
+
+#endif