qt5base-lts/examples/opengl/hellogl2/window.cpp

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "glwidget.h"
#include "window.h"
#include "mainwindow.h"
#include <QSlider>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QKeyEvent>
#include <QPushButton>
#include <QDesktopWidget>
#include <QApplication>
#include <QMessageBox>

Window::Window(MainWindow *mw)
    : mainWindow(mw)
{
    glWidget = new GLWidget;

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

    connect(xSlider, &QSlider::valueChanged, glWidget, &GLWidget::setXRotation);
    connect(glWidget, &GLWidget::xRotationChanged, xSlider, &QSlider::setValue);
    connect(ySlider, &QSlider::valueChanged, glWidget, &GLWidget::setYRotation);
    connect(glWidget, &GLWidget::yRotationChanged, ySlider, &QSlider::setValue);
    connect(zSlider, &QSlider::valueChanged, glWidget, &GLWidget::setZRotation);
    connect(glWidget, &GLWidget::zRotationChanged, zSlider, &QSlider::setValue);

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

    QWidget *w = new QWidget;
    w->setLayout(container);
    mainLayout->addWidget(w);
    dockBtn = new QPushButton(tr("Undock"), this);
    connect(dockBtn, &QPushButton::clicked, this, &Window::dockUndock);
    mainLayout->addWidget(dockBtn);

    setLayout(mainLayout);

    xSlider->setValue(15 * 16);
    ySlider->setValue(345 * 16);
    zSlider->setValue(0 * 16);

    setWindowTitle(tr("Hello GL"));
}

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;
}

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

void Window::dockUndock()
{
    if (parent()) {
        setParent(nullptr);
        setAttribute(Qt::WA_DeleteOnClose);
        move(QApplication::desktop()->width() / 2 - width() / 2,
             QApplication::desktop()->height() / 2 - height() / 2);
        dockBtn->setText(tr("Dock"));
        show();
    } else {
        if (!mainWindow->centralWidget()) {
            if (mainWindow->isVisible()) {
                setAttribute(Qt::WA_DeleteOnClose, false);
                dockBtn->setText(tr("Undock"));
                mainWindow->setCentralWidget(this);
            } else {
                QMessageBox::information(nullptr, tr("Cannot dock"),
                                         tr("Main window already closed"));
            }
        } else {
            QMessageBox::information(nullptr, tr("Cannot dock"),
                                     tr("Main window already occupied"));
        }
    }
}