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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "window.h"
++ #include "glwidget.h"
++ #include <QSlider>
++ #include <QVBoxLayout>
++ #include <QHBoxLayout>
++ #include <QKeyEvent>
++ #include <QPushButton>
++ #include <QApplication>
++ #include <QMessageBox>
++ #include <QMainWindow>
++
++ static QMainWindow *findMainWindow()
++ {
++ for (auto *w : QApplication::topLevelWidgets()) {
++ if (auto *mw = qobject_cast<QMainWindow *>(w))
++ return mw;
++ }
++ return nullptr;
++ }
++
++ Window::Window()
++ {
++ 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(this);
++ QWidget *w = new QWidget;
++ QHBoxLayout *container = new QHBoxLayout(w);
++ container->addWidget(glWidget);
++ container->addWidget(xSlider);
++ container->addWidget(ySlider);
++ container->addWidget(zSlider);
++
++ mainLayout->addWidget(w);
++ dockBtn = nullptr;
++
++ #ifndef Q_OS_WASM
++ dockBtn = new QPushButton(tr("Undock"), this);
++ connect(dockBtn, &QPushButton::clicked, this, &Window::dockUndock);
++ mainLayout->addWidget(dockBtn);
++ #endif
++ 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 (isWindow() && e->key() == Qt::Key_Escape)
++ close();
++ else
++ QWidget::keyPressEvent(e);
++ }
++
++ void Window::dockUndock()
++ {
++ if (parent())
++ undock();
++ else
++ dock();
++ }
++
++ void Window::dock()
++ {
++ auto *mainWindow = findMainWindow();
++ if (mainWindow == nullptr || !mainWindow->isVisible()) {
++ QMessageBox::information(this, tr("Cannot Dock"),
++ tr("Main window already closed"));
++ return;
++ }
++ if (mainWindow->centralWidget()) {
++ QMessageBox::information(this, tr("Cannot Dock"),
++ tr("Main window already occupied"));
++ return;
++ }
++ setAttribute(Qt::WA_DeleteOnClose, false);
++ dockBtn->setText(tr("Undock"));
++ mainWindow->setCentralWidget(this);
++ }
++
++ void Window::undock()
++ {
++ setParent(nullptr);
++ setAttribute(Qt::WA_DeleteOnClose);
++ const auto geometry = screen()->availableGeometry();
++ move(geometry.x() + (geometry.width() - width()) / 2,
++ geometry.y() + (geometry.height() - height()) / 2);
++ dockBtn->setText(tr("Dock"));
++ show();
++ }