Qt 4.8: mainwindow.cpp Example File (opengl/hellogl_es/mainwindow.cpp)

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# mainwindow.cpp Example File

opengl/hellogl_es/mainwindow.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** 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 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.
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     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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     #include "mainwindow.h"

     #include <QApplication>
     #include <QMenuBar>
     #include <QGroupBox>
     #include <QGridLayout>
     #include <QSlider>
     #include <QLabel>
     #include <QTimer>

     #include "glwidget.h"

     MainWindow::MainWindow()
     {
         GLWidget *glwidget = new GLWidget();
         QLabel *label = new QLabel(this);
         QTimer *timer = new QTimer(this);
         QSlider *slider = new QSlider(this);
         slider->setOrientation(Qt::Horizontal);

         slider->setRange(0, 100);
         slider->setSliderPosition(50);
         timer->setInterval(10);
         label->setText("A QGlWidget with OpenGl ES");
         label->setAlignment(Qt::AlignHCenter);

         QGroupBox * groupBox = new QGroupBox(this);
         setCentralWidget(groupBox);
         groupBox->setTitle("OpenGL ES Example");

         QGridLayout *layout = new QGridLayout(groupBox);

         layout->addWidget(glwidget,1,0,8,1);
         layout->addWidget(label,9,0,1,1);
         layout->addWidget(slider, 11,0,1,1);

         groupBox->setLayout(layout);

         QMenu *fileMenu = new QMenu("File");
         QMenu *helpMenu = new QMenu("Help");
         QMenu *showMenu = new QMenu("Show");
         menuBar()->addMenu(fileMenu);
         menuBar()->addMenu(showMenu);
         menuBar()->addMenu(helpMenu);
         QAction *exit = new QAction("Exit", fileMenu);
         QAction *aboutQt = new QAction("AboutQt", helpMenu);
         QAction *showLogo = new QAction("Show 3D Logo", showMenu);
         QAction *showTexture = new QAction("Show 2D Texture", showMenu);
         QAction *showBubbles = new QAction("Show bubbles", showMenu);
         showBubbles->setCheckable(true);
         showBubbles->setChecked(true);
         fileMenu->addAction(exit);
         helpMenu->addAction(aboutQt);
         showMenu->addAction(showLogo);
         showMenu->addAction(showTexture);
         showMenu->addAction(showBubbles);

         QObject::connect(timer, SIGNAL(timeout()), glwidget, SLOT(updateGL()));
         QObject::connect(exit, SIGNAL(triggered(bool)), this, SLOT(close()));
         QObject::connect(aboutQt, SIGNAL(triggered(bool)), qApp, SLOT(aboutQt()));

         QObject::connect(showLogo, SIGNAL(triggered(bool)), glwidget, SLOT(setLogo()));
         QObject::connect(showTexture, SIGNAL(triggered(bool)), glwidget, SLOT(setTexture()));
         QObject::connect(showBubbles, SIGNAL(triggered(bool)), glwidget, SLOT(showBubbles(bool)));
         QObject::connect(slider, SIGNAL(valueChanged(int)), glwidget, SLOT(setScaling(int)));
         timer->start();
     }