qt-everywhere-src-5.15.1/qtbase/examples/opengl/legacy/hellogl/window.cpp

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#include <QtWidgets>

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

//! [0]
Window::Window()
{
    glWidget = new GLWidget;

    xSlider = createSlider();
    ySlider = createSlider();
    zSlider = createSlider();

    connect(xSlider, SIGNAL(valueChanged(int)), glWidget, SLOT(setXRotation(int)));
    connect(glWidget, SIGNAL(xRotationChanged(int)), xSlider, SLOT(setValue(int)));
    connect(ySlider, SIGNAL(valueChanged(int)), glWidget, SLOT(setYRotation(int)));
    connect(glWidget, SIGNAL(yRotationChanged(int)), ySlider, SLOT(setValue(int)));
    connect(zSlider, SIGNAL(valueChanged(int)), glWidget, SLOT(setZRotation(int)));
    connect(glWidget, SIGNAL(zRotationChanged(int)), zSlider, SLOT(setValue(int)));
//! [0]

//! [1]
    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"));
}
//! [1]

//! [2]
QSlider *Window::createSlider()
{
    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);
    return slider;
}
//! [2]

void Window::keyPressEvent(QKeyEvent *e)
{
    if (e->key() == Qt::Key_Escape)
        close();
    else
        QWidget::keyPressEvent(e);
}