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// Copyright (C) 2020 The Qt Company.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QScreen>
#include <QApplication>
#include <QMainWindow>
#include <QMdiArea>
#include <QMdiSubWindow>
#include <QQuickWidget>
#include <QVBoxLayout>
#include <QPushButton>
void configureMainWindow(QMainWindow *w, QMdiArea *mdiArea, QPushButton *button)
{
auto widget = new QWidget;
auto layout = new QVBoxLayout;
layout->addWidget(mdiArea);
layout->addWidget(button);
widget->setLayout(layout);
w->setCentralWidget(widget);
}
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
QMainWindow w1;
w1.winId();
w1.windowHandle()->setScreen(QGuiApplication::screens().at(0));
auto mdiArea1 = new QMdiArea;
auto button1 = new QPushButton("Switch to this window");
configureMainWindow(&w1, mdiArea1, button1);
w1.setGeometry(0, 0, 800, 800);
w1.show();
QMainWindow w2;
w2.winId();
const int secondScreenIdx = QGuiApplication::screens().size() > 1 ? 1 : 0;
w2.windowHandle()->setScreen(QGuiApplication::screens().at(secondScreenIdx));
auto mdiArea2 = new QMdiArea;
auto button2 = new QPushButton("Switch to this window");
configureMainWindow(&w2, mdiArea2, button2);
w2.setGeometry(0, 0, 800, 800);
w2.show();
QMdiSubWindow* subWindow = new QMdiSubWindow();
QQuickWidget *quickWidget = new QQuickWidget();
quickWidget->resize(QSize(400, 400));
quickWidget->setResizeMode(QQuickWidget::SizeRootObjectToView);
quickWidget->setSource(QUrl("qrc:/main.qml"));
subWindow->setWidget(quickWidget);
QObject::connect(button1, &QPushButton::clicked,
[mdiArea1, mdiArea2, subWindow, button1, button2]() {
mdiArea2->removeSubWindow(subWindow);
mdiArea1->addSubWindow(subWindow);
subWindow->show();
button1->setEnabled(false);
button2->setEnabled(true);
});
QObject::connect(button2, &QPushButton::clicked,
[mdiArea1, mdiArea2, subWindow, button1, button2]() {
mdiArea1->removeSubWindow(subWindow);
mdiArea2->addSubWindow(subWindow);
subWindow->show();
button1->setEnabled(true);
button2->setEnabled(false);
});
mdiArea2->addSubWindow(subWindow);
button2->setEnabled(false);
subWindow->show();
return app.exec();
}
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