[haiku-bugs] [Haiku] #9884: B_FULL_UPDATE_ON_RESIZE doesn't call Draw() intermittedly
- From: "jscipione" <trac@xxxxxxxxxxxx>
- Date: Fri, 19 Jul 2013 16:40:57 -0000
#9884: B_FULL_UPDATE_ON_RESIZE doesn't call Draw() intermittedly
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Reporter: jscipione | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Servers/app_server | Version: R1/alpha4.1
Keywords: | Blocked By:
Blocking: | Has a Patch: 0
Platform: All |
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Experienced this issue in DeskCalc with B_FULL_UPDATE_ON_RESIZE and
B_FRAME_EVENTS view flags and B_FOLLOW_ALL_SIDES for the resizing mode
flag of the view. When you resize the window App Server calls
FrameResized() but occasionally doesn't call Draw() afterwords. In
DeskCalc this is worked around by calling Invalidate() at the end of
FrameResized() but that shouldn't be needed.
I've attached a test program to this ticket that you can see the issue
more clearly. Build it with:
{{{
gcc -lbe -o resizetest resizetest.cpp
}}}
Then run the program from terminal like this to see the output:
{{{
./resizetest
}}}
I've tested this program on both BeOS R5 and Haiku and both OS's seem to
experience this issue but it happens much more often on Haiku.
The view starts off green. On R5 as you resize the view it flashes red
then settles on blue (iow Draw() then FrameResized() get called) while on
Haiku it flashes blue then settles on red (iow FrameResized() then Draw()
get called). While this is different between the two OS's I don't think
it's a problem, I just wanted to point out the difference in case it helps
to track down the bug.
The real problem is that when you're done resizing the window occasionally
the view will end up blue on Haiku because Draw() never got called. This
is a little bit tough to do with the test program but is very easy to pull
off on DeskCalc. If you look at the output of the program in Terminal
though it shows what is happening: FrameResized() gets called several
times with no corresponding Draw().
This might be related to #7010.
--
Ticket URL: <http://dev.haiku-os.org/ticket/9884>
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