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List: kde-panel-devel
Subject: Review Request: Workaround Taskbar ghost entries bug
From: "Alex Fiestas" <alex () eyeos ! org>
Date: 2011-10-05 9:26:10
Message-ID: 20111005092610.9804.56339 () vidsolbach ! de
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This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/102779/
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Review request for Plasma and Aaron J. Seigo.
Description
-------
Well, as some of you may know I have been tracking down the ghost entries b=
ug... this time I have NOT been able to fix the source of the problem but a=
t least after some GDB at BDS I think I have a workaround.
A Ghost entry happens when a TaskItem is not either a startup or a task, in=
that case the code that "paints" the task doesn't know what to do but it r=
eserve the space anyway.
Currently the code path is like this:
1-TaskGruopItem::itemAdded is called
2-It calles TaskGruopItem::createAbstractItem
3-createAbstractItem takes a GroupableItem and cast it either to a GroupIte=
m, or LauncherItem or TaskItem depending on the ::itemTtype()
createAbstractItem is prepared to return 0 when an AbstractTaskItem can't b=
e created, and even further WindowTaskItem::setTask is checking if the task=
Item is not a startup or a task, the problem is that setTask returns void s=
o we can't really know if the "setting" was succeed or not. In that case, a=
n "empty" WindowTaskItem is returned, being it a ghost entry.
This workaround what does is check if the taskItem is valid, if it is not 0=
is returned.
This is a workaround since, in theory a TaskItem should ALWAYS be either a =
startup or a task so we should find the root of the problem instead of addi=
ng yet another check. Is precisely this kind of checks that make all *tasks=
* stack a mess.
Diffs
-----
plasma/desktop/applets/tasks/taskgroupitem.cpp eec27c2 =
Diff: http://git.reviewboard.kde.org/r/102779/diff/diff
Testing
-------
I have been using the patch for 3 days playing around with activities and v=
irtual desktops, so far so good.
Thanks,
Alex Fiestas
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This is an automatically generated e-mail. To reply, visit:
<a href="http://git.reviewboard.kde.org/r/102779/">http://git.reviewboard.kde.org/r/102779/</a>
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<div>Review request for Plasma and Aaron J. Seigo.</div>
<div>By Alex Fiestas.</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>
<td>
<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;">Well, as some of you may know I have been tracking down the ghost \
entries bug... this time I have NOT been able to fix the source of the problem but at \
least after some GDB at BDS I think I have a workaround.
A Ghost entry happens when a TaskItem is not either a startup or a task, in that case \
the code that "paints" the task doesn't know what to do but it reserve \
the space anyway. Currently the code path is like this:
1-TaskGruopItem::itemAdded is called
2-It calles TaskGruopItem::createAbstractItem
3-createAbstractItem takes a GroupableItem and cast it either to a GroupItem, or \
LauncherItem or TaskItem depending on the ::itemTtype()
createAbstractItem is prepared to return 0 when an AbstractTaskItem can't be \
created, and even further WindowTaskItem::setTask is checking if the taskItem is not \
a startup or a task, the problem is that setTask returns void so we can't really \
know if the "setting" was succeed or not. In that case, an \
"empty" WindowTaskItem is returned, being it a ghost entry.
This workaround what does is check if the taskItem is valid, if it is not 0 is \
returned.
This is a workaround since, in theory a TaskItem should ALWAYS be either a startup or \
a task so we should find the root of the problem instead of adding yet another check. \
Is precisely this kind of checks that make all *tasks* stack a mess. </pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<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;">I have been using the patch for 3 days playing around with activities \
and virtual desktops, so far so good.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>plasma/desktop/applets/tasks/taskgroupitem.cpp <span style="color: \
grey">(eec27c2)</span></li>
</ul>
<p><a href="http://git.reviewboard.kde.org/r/102779/diff/" style="margin-left: \
3em;">View Diff</a></p>
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