从系统任务栏应用程序菜单中打开QDialog

Question

I'm trying to open a QDialog from an option in a system tray menu (QtGui.QMenu). But my original class 'Mensageiro' is derived from QtGui.QSystemTrayIcon and so I get an Exception when I create the QDialog instance:

TypeError: 'PySide.QtGui.QDialog' called with wrong argument types:
   PySide.QtGui.QDialog(Mensageiro)
Supported signatures:
   PySide.QtGui.QDialog(PySide.QtGui.QWidget = None, PySide.QtCore.Qt.WindowFlags = 0)

What can I do to open the dialog? I don't want it to be parentless.

Answer 1

The solution was actually very simple. Even a system tray application needs a QWidget as its parent. The parent widget remains hidden. So I create the QDialog as a child of the same parent widget:

self.dialog = dialogos.DialogExemplo(self.parent)

When I close the tray application with an "exit" option, the following code is executed:

 self.application.setQuitOnLastWindowClosed(True)
 # Hide the tray icon before it is destroyed
 self.hide()
 # Close the parent widget, killing all open windows.
 self.parent.close()