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

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        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
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    ** information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
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        #include <QtGui>

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

        Window::Window()
        {
            glWidget = new GLWidget;

            xSlider = createSlider(SIGNAL(xRotationChanged(int)),
                                   SLOT(setXRotation(int)));
            ySlider = createSlider(SIGNAL(yRotationChanged(int)),
                                   SLOT(setYRotation(int)));
            zSlider = createSlider(SIGNAL(zRotationChanged(int)),
                                   SLOT(setZRotation(int)));

            QHBoxLayout *mainLayout = new QHBoxLayout;
            mainLayout->addWidget(glWidget);
            mainLayout->addWidget(xSlider);
            mainLayout->addWidget(ySlider);
            mainLayout->addWidget(zSlider);
            setLayout(mainLayout);

            xSlider->setValue(15 * 16);
            ySlider->setValue(345 * 16);
            zSlider->setValue(0 * 16);
            setWindowTitle(tr("Hello GL"));
        }

        QSlider *Window::createSlider(const char *changedSignal, const char *setterSlot)
        {
            QSlider *slider = new QSlider(Qt::Vertical);
            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;
        }