Review Request: Fix KCategorizedView race
Aaron J. Seigo
aseigo at kde.org
Tue Dec 6 20:22:53 GMT 2011
> On Dec. 6, 2011, 2:07 p.m., Aaron J. Seigo wrote:
> > Ship It!
>
> Thomas Lübking wrote:
> What's the policy for merging things into the frameworks branch?
> - Merge?
> - Cherry-pick?
> - Have someone else do it anyway?
we merge KDE/4.7 into frameworks every so often. i did it just the other day; sometimes dfaure does it. so don't worry, this will happen for you :)
- Aaron J.
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This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/103335/#review8750
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On Dec. 5, 2011, 2:21 p.m., Thomas Lübking wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/103335/
> -----------------------------------------------------------
>
> (Updated Dec. 5, 2011, 2:21 p.m.)
>
>
> Review request for kdelibs, Rafael Fernández López and Jaime Torres Amate.
>
>
> Description
> -------
>
> Also see https://git.reviewboard.kde.org/r/103313/
>
>
> QListView::updateGeometries() has it's own opinion on whether the scrollbars should be visible (valid range) or not
> and triggers a (sometimes additionally timered) resize through ::layoutChildren()
> http://qt.gitorious.org/qt/qt/blobs/4.7/src/gui/itemviews/qlistview.cpp#line1499
> (the comment above the main block isn't all accurate, layoutChldren is called regardless of the policy)
>
> As a result QListView and KCategorizedView occasionally started a race on the scrollbar visibility, effectively blocking the UI
> So we prevent QListView from having an own opinion on the scrollbar visibility by
> fixing it before calling the baseclass QListView::updateGeometries() and restoring the policy afterwards
>
>
> This addresses bugs 213068 and 287847.
> http://bugs.kde.org/show_bug.cgi?id=213068
> http://bugs.kde.org/show_bug.cgi?id=287847
>
>
> Diffs
> -----
>
> kdeui/itemviews/kcategorizedview.cpp 46a1cde
> kutils/kpluginselector.cpp ca0691d
>
> Diff: http://git.reviewboard.kde.org/r/103335/diff/diff
>
>
> Testing
> -------
>
> Yes, resizing the "kcmshell4 kwincompositing", "all effects" KPluginSelector with large scrollbar sizes (bespin/position indicator/32px; oxygen was often sufficient with the default size) after commit e91e5fed6b1aad365e12e919f430c3e8147552d3 (see https://git.reviewboard.kde.org/r/103165/ ) was a reliable way to trigger the issue for me.
> It also showed that resize/updateGeometries occured in pairs (ie 4calls forming a block), what's never happened again with the patch.
>
>
> Thanks,
>
> Thomas Lübking
>
>
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