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This is an automatically generated e-mail. To reply, visit:
<a href="http://git.reviewboard.kde.org/r/103335/">http://git.reviewboard.kde.org/r/103335/</a>
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<div>Review request for kdelibs, Rafael Fernández López and Jaime Torres Amate.</div>
<div>By Thomas Lübking.</div>
<p style="color: grey;"><i>Updated Dec. 8, 2011, 6:04 p.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Changes</h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Suck this, you little nasty bug >)
It's required to keep the policy down all the time and change the visibility according to it's original at the end.
I was not able to reproduce issues with either systemsettings or plugins.
Tests, anyone?</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">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
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">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.</pre>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="http://bugs.kde.org/show_bug.cgi?id=213068">213068</a>,
<a href="http://bugs.kde.org/show_bug.cgi?id=287847">287847</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> (updated)</h1>
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<li>kdeui/itemviews/kcategorizedview.cpp <span style="color: grey">(5e33861)</span></li>
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<p><a href="http://git.reviewboard.kde.org/r/103335/diff/" style="margin-left: 3em;">View Diff</a></p>
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