Implement a slot in your QMainWindow where you will open your new Window, Place a widget on your QMainWindow, Connect a signal from this widget to a slot from the QMainWindow (for example: if the widget is a QPushButton connect the signal click() to the QMainWindow custom slot you have created). Code example: MainWindow.h // … Read more
The method always returns true or false, and this is always equal to the DialogResult property of the window at the time it closes. But the DialogResult property is null before the window is closed, and another thread could check the property. So it kind of makes sense that the return value is a nullable … Read more
Using multiple GUI threads is tricky business, and I would advise against it, if this is your only motivation for doing so. A much more suitable approach is to use Show() instead of ShowDialog(), and disable the owner form until the popup form returns. There are just four considerations: When ShowDialog(owner) is used, the popup … Read more