Document that wxEraseEvent::GetDC() never returns NULL.
This makes implementation of EVT_ERASE_BACKGROUND handlers simpler. Closes #13736. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69954 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
@@ -2852,11 +2852,7 @@ public:
|
|||||||
To intercept this event, use the EVT_ERASE_BACKGROUND macro in an event table
|
To intercept this event, use the EVT_ERASE_BACKGROUND macro in an event table
|
||||||
definition.
|
definition.
|
||||||
|
|
||||||
You must call wxEraseEvent::GetDC and use the returned device context if it is
|
You must use the device context returned by GetDC() to draw on, don't create
|
||||||
non-@NULL. If it is @NULL, create your own temporary wxClientDC object.
|
|
||||||
|
|
||||||
@remarks
|
|
||||||
Use the device context returned by GetDC to draw on, don't create
|
|
||||||
a wxPaintDC in the event handler.
|
a wxPaintDC in the event handler.
|
||||||
|
|
||||||
@beginEventTable{wxEraseEvent}
|
@beginEventTable{wxEraseEvent}
|
||||||
@@ -2879,6 +2875,8 @@ public:
|
|||||||
|
|
||||||
/**
|
/**
|
||||||
Returns the device context associated with the erase event to draw on.
|
Returns the device context associated with the erase event to draw on.
|
||||||
|
|
||||||
|
The returned pointer is never @NULL.
|
||||||
*/
|
*/
|
||||||
wxDC* GetDC() const;
|
wxDC* GetDC() const;
|
||||||
};
|
};
|
||||||
|
Reference in New Issue
Block a user