+
+ def show(self):
+ if self.shown:
+ return
+ self.shown = True
+ self.instance.show()
+ for x in self.onShow:
+ x()
+ for (name, val) in self.items():
+ if isinstance(val, GUIComponent):
+ val.onShow()
+
+ def hide(self):
+ if not self.shown:
+ return
+ self.shown = False
+ self.instance.hide()
+ for x in self.onHide:
+ x()
+ for (name, val) in self.items():
+ if isinstance(val, GUIComponent):
+ val.onHide()