window_changed_signaler.py
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00032 
00033 from python_qt_binding.QtCore import QEvent, QObject, Signal
00034 
00035 
00036 class WindowChangedSignaler(QObject):
00037 
00038     """Signaler for for filtered events of an icon or title change of a widget."""
00039 
00040     hide_signal = Signal(object)
00041     show_signal = Signal(object)
00042 
00043     window_icon_changed_signal = Signal(object)
00044     window_title_changed_signal = Signal(object)
00045 
00046     def __init__(self, widget, parent=None):
00047         super(WindowChangedSignaler, self).__init__(parent)
00048         self._widget = widget
00049         self.setObjectName('WindowChangedSignaler__' + self._widget.objectName())
00050         self._recursive_invocation = False
00051         self._widget.installEventFilter(self)
00052 
00053     def emit_all(self):
00054         if self._widget.isVisible():
00055             self.show_signal.emit(self._widget)
00056         else:
00057             self.hide_signal.emit(self._widget)
00058         self.window_icon_changed_signal.emit(self._widget)
00059         self.window_title_changed_signal.emit(self._widget)
00060 
00061     def eventFilter(self, watched, event):
00062         if event.type() == QEvent.Hide:
00063             self.hide_signal.emit(watched)
00064 
00065         if event.type() == QEvent.Show:
00066             self.show_signal.emit(watched)
00067 
00068         if event.type() == QEvent.WindowIconChange:
00069             # prevent emitting recursive event when emitted signal will trigger another event
00070             if not self._recursive_invocation:
00071                 self._recursive_invocation = True
00072                 self.window_icon_changed_signal.emit(watched)
00073                 self._recursive_invocation = False
00074 
00075         if event.type() == QEvent.WindowTitleChange:
00076             # prevent emitting recursive event when emitted signal will trigger another event
00077             if not self._recursive_invocation:
00078                 self._recursive_invocation = True
00079                 self.window_title_changed_signal.emit(watched)
00080                 self._recursive_invocation = False
00081 
00082         return QObject.eventFilter(self, watched, event)


qt_gui
Author(s): Dirk Thomas
autogenerated on Thu Jun 6 2019 18:07:34