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List: kde-core-devel
Subject: Review Request: Fix KCategorizedView race
From: Thomas_Lübking <thomas.luebking () web ! de>
Date: 2011-12-05 14:21:11
Message-ID: 20111205142111.26176.55284 () vidsolbach ! de
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This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/103335/
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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
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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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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>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid \
#b8b5a0"> <tr>
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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 </pre>
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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> </td>
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<div style="margin-top: 1.5em;">
<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>
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>kdeui/itemviews/kcategorizedview.cpp <span style="color: grey">(46a1cde)</span></li>
<li>kutils/kpluginselector.cpp <span style="color: grey">(ca0691d)</span></li>
</ul>
<p><a href="http://git.reviewboard.kde.org/r/103335/diff/" style="margin-left: 3em;">View Diff</a></p>
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