Qt 4.0: window.cpp Example File (opengl/textures/window.cpp)

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# window.cpp Example File
opengl/textures/window.cpp

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        ** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
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    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
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        #include <QtGui>

        #include "glwidget.h"
        #include "window.h"

        Window::Window()
        {
            QGridLayout *mainLayout = new QGridLayout;

            glWidgets[0][0] = 0;

            for (int i = 0; i < NumRows; ++i) {
                for (int j = 0; j < NumColumns; ++j) {
                    QColor clearColor;
                    clearColor.setHsv(((i * NumColumns) + j) * 255
                                      / (NumRows * NumColumns - 1),
                                      255, 63);

                    glWidgets[i][j] = new GLWidget(this, glWidgets[0][0]);
                    glWidgets[i][j]->setClearColor(clearColor);
                    glWidgets[i][j]->rotateBy(+42 * 16, +42 * 16, -21 * 16);
                    mainLayout->addWidget(glWidgets[i][j], i, j);

                    connect(glWidgets[i][j], SIGNAL(clicked()),
                            this, SLOT(setCurrentGlWidget()));
                }
            }
            setLayout(mainLayout);

            currentGlWidget = glWidgets[0][0];

            QTimer *timer = new QTimer(this);
            connect(timer, SIGNAL(timeout()), this, SLOT(rotateOneStep()));
            timer->start(20);

            setWindowTitle(tr("Textures"));
        }

        void Window::setCurrentGlWidget()
        {
            currentGlWidget = qobject_cast<GLWidget *>(sender());
        }

        void Window::rotateOneStep()
        {
            if (currentGlWidget)
                currentGlWidget->rotateBy(+2 * 16, +2 * 16, -1 * 16);
        }