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gmRegetMixin - GNUmed data change callback mixin. Widget code can mix in this class as a base class and thus gain the infrastructure to update it's display when data changes. If the widget is not visible it will only schedule refetching data from the business layer. If it *is* visible it will immediately fetch and redisplay. You must call cRegetOnPaintMixin.__init__() in your own __init__() after calling __init__() on the appropriate wx.Widgets class your widget inherits from. You must then make sure to call _schedule_data_reget() whenever you learn of backend data changes. This will in most cases happen after you receive a gmDispatcher signal indicating a change in the backend. The _populate_with_data(self) method must be overriden in the including class and must return True if the UI was successfully repopulated with content. @copyright: authors Template for users: #----------------------------------------------------- # reget-on-paint mixin API # # remember to call # self._schedule_data_reget() # whenever you learn of data changes from database # listener threads, dispatcher signals etc. #----------------------------------------------------- def _populate_with_data(self): # fill the UI with data print "need to implement _populate_with_data" return False return True #-----------------------------------------------------
Author: K.Hilbert <Karsten.Hilbert@gmx.net>
License: GPL v2 or later (details at http://www.gnu.org)
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cRegetOnPaintMixin Mixin to add redisplay_data-on-wx.EVT_PAINT aspect. |
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Imports: wx
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