nanogui: UPDATEREGIONS problems
Subject:
UPDATEREGIONS problems
From:
####@####.####
Date:
20 Nov 2002 07:56:32 -0000
Message-Id: <003901c29069$9b72c0f0$9af1ebd3@jedi>
I wonder if the UPDATEREGIONS flag work,
I turned on the UPDATEREGIONS flag and called "InvalidateRect()" to redraw only the designated rectangular area.
However microwindows redraw the whole window, whenever the paint message arrives.
I checked the update region which are handled in HWND structure and they had no problems.
I think the update region in HWND is passed to PSD and HDC when GetDCEx() is called but I can't understand the mechanism.
In GetDCEx() code, the codes surrounded by UPDATEREGION do not seem to work,
because GetDCEx() function is always called with the "hrgnClip=NULL" as parameter.
If I am wrong and there is a way to enable partial redrawing, please let me know.
I am in a serious trouble now as I have to change the whole software architecture, if partial redrawing is not possible.
Thanks in advance.
