[haiku-bugs] Re: [Haiku] #3042: [ShowImage] wheel scrolling flickers image path string
- From: "stippi" <trac@xxxxxxxxxxxx>
- Date: Fri, 19 Nov 2010 08:02:10 -0000
#3042: [ShowImage] wheel scrolling flickers image path string
-------------------------------------+------------------------------
Reporter: diver | Owner: nobody
Type: bug | Status: assigned
Priority: normal | Milestone: R1
Component: Applications/ShowImage | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Has a Patch: 0
Platform: All | Blocking:
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Comment (by stippi):
The most simple solution is to invalidate the whole view before scrolling.
Since recently the app_server does not scroll dirty regions anymore, to
make it possible to work around exactly this problem. You could check if
the caption is displayed and invalidate before scrolling only then.
Because of the double buffering, the overhead is not actually more by
triggering a draw, since the app_server scrolls in the offscreen buffer
and blits to the front buffer, which is not much different from drawing
the bitmap in the offscreen buffer and blitting the same region to the
front buffer.
--
Ticket URL: <http://dev.haiku-os.org/ticket/3042#comment:4>
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