- 1 year ago
Show a QWidget in virtual desktop with several monitors
To display a QWidget
on a specific virtual desktop that spans multiple monitors in Qt, you can make use of the QScreen
and QWindow
classes. Here's an example:
cpp#include <QtWidgets>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QWidget widget;
widget.setWindowTitle("My Widget");
widget.resize(400, 300);
// Get the screens
QList<QScreen*> screens = QGuiApplication::screens();
// Create a virtual desktop spanning multiple screens
QDesktopWidget virtualDesktop;
virtualDesktop.setScreen(screens);
// Set the widget to be displayed on the virtual desktop
widget.setWindowFlags(Qt::Window);
widget.windowHandle()->setScreen(virtualDesktop.screen());
widget.show();
return app.exec();
}
In this example, we create a QWidget
called widget
and set its properties such as the window title and size. We then retrieve a list of available screens using QGuiApplication::screens()
. Next, we create a QDesktopWidget
called virtualDesktop
and set it to span all the screens using the setScreen()
method.
To display the widget on the virtual desktop, we set the window flags of the widget to Qt::Window
to enable it as a top-level window. Then, we set the screen of the widget's QWindow
to the virtual desktop's screen using widget.windowHandle()->setScreen()
. This ensures that the widget appears on the virtual desktop spanning multiple screens.
Finally, we show the widget and start the Qt event loop by calling app.exec()
.
Note that the code provided is in C++ using the Qt framework. If you are using PyQt or PySide, you can achieve a similar result by translating the C++ code to Python.