An erase event is sent when a window’s background needs to be repainted.
On some platforms, such as GTK+, this event is simulated (simply generated just before the paint event) and may cause flicker. It is therefore recommended that you set the text background colour explicitly in order to prevent flicker. The default background colour under GTK+ is grey.
To intercept this event, use the EVT_ERASE_BACKGROUND macro in an event table definition.
You must call EraseEvent::GetDC and use the returned device context if it is non-NULL. If it is NULL, create your own temporary ClientDC object.
To process an erase event, use this event handler macro to direct input to a member function that takes a EraseEvent argument.
| evt_erase_background() { | event | ... } | Process a EVT_ERASE_BACKGROUND event. |
Use the device context returned by GetDC to draw on, don’t create a PaintDC in the event handler.
EraseEvent.new(Integer id = 0, DC dc = nil)Constructor.
DC get_dc()Returns the device context associated with the erase event to draw on.
[This page automatically generated from the Textile source at Wed Sep 09 02:21:07 +0100 2009]