Emitted when displaying the print dialog.
If you return a widget in a handler for this signal it will be added to a custom tab in the print dialog. You typically return a container widget with multiple widgets in it.
The print dialog owns the returned widget, and its lifetime is not
controlled by the application. However, the widget is guaranteed
to stay around until the
signal is emitted on the operation. Then you can read out any
information you need from the widgets.
The default handler is called after the handlers added via
A custom widget that gets embedded in the print dialog.
|The data is owned by the called function.
|The return value can be