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50
51#include <QDesktopWidget>
52#include <QScreen>
53#include <QApplication>
54#include <QMainWindow>
55#include <QMdiArea>
56#include <QMdiSubWindow>
57#include <QQuickWidget>
58#include <QVBoxLayout>
59#include <QPushButton>
60
61void configureMainWindow(QMainWindow *w, QMdiArea *mdiArea, QPushButton *button)
62{
63 auto widget = new QWidget;
64 auto layout = new QVBoxLayout;
65 layout->addWidget(mdiArea);
66 layout->addWidget(button);
67 widget->setLayout(layout);
68 w->setCentralWidget(widget);
69}
70
71int main(int argc, char* argv[])
72{
73 QApplication app(argc, argv);
74
75 QMainWindow w1;
76 w1.winId();
77 w1.windowHandle()->setScreen(QGuiApplication::screens().at(i: 0));
78 auto mdiArea1 = new QMdiArea;
79 auto button1 = new QPushButton("Switch to this window");
80 configureMainWindow(w: &w1, mdiArea: mdiArea1, button: button1);
81 w1.setGeometry(ax: 0, ay: 0, aw: 800, ah: 800);
82 w1.show();
83
84 QMainWindow w2;
85 w2.winId();
86 w2.windowHandle()->setScreen(QGuiApplication::screens().at(i: 1));
87 auto mdiArea2 = new QMdiArea;
88 auto button2 = new QPushButton("Switch to this window");
89 configureMainWindow(w: &w2, mdiArea: mdiArea2, button: button2);
90 w2.setGeometry(ax: 0, ay: 0, aw: 800, ah: 800);
91 w2.show();
92
93 QMdiSubWindow* subWindow = new QMdiSubWindow();
94
95 QQuickWidget *quickWidget = new QQuickWidget();
96 quickWidget->resize(QSize(400, 400));
97 quickWidget->setResizeMode(QQuickWidget::SizeRootObjectToView);
98 quickWidget->setSource(QUrl("qrc:/main.qml"));
99
100 subWindow->setWidget(quickWidget);
101
102 QObject::connect(sender: button1, signal: &QPushButton::clicked,
103 slot: [mdiArea1, mdiArea2, subWindow, button1, button2]() {
104 mdiArea2->removeSubWindow(widget: subWindow);
105 mdiArea1->addSubWindow(widget: subWindow);
106 subWindow->show();
107 button1->setEnabled(false);
108 button2->setEnabled(true);
109 });
110
111 QObject::connect(sender: button2, signal: &QPushButton::clicked,
112 slot: [mdiArea1, mdiArea2, subWindow, button1, button2]() {
113 mdiArea1->removeSubWindow(widget: subWindow);
114 mdiArea2->addSubWindow(widget: subWindow);
115 subWindow->show();
116 button1->setEnabled(true);
117 button2->setEnabled(false);
118 });
119
120 mdiArea2->addSubWindow(widget: subWindow);
121 button2->setEnabled(false);
122 subWindow->show();
123
124 return app.exec();
125}
126

source code of qt3d/tests/manual/quickwidget-switch/main.cpp