<html>
<body>
<div style="font-family: Verdana, Arial, Helvetica, Sans-Serif;">
<table bgcolor="#f9f3c9" width="100%" cellpadding="8" style="border: 1px #c9c399 solid;">
<tr>
<td>
This is an automatically generated e-mail. To reply, visit:
<a href="http://reviewboard.kde.org/r/4451/">http://reviewboard.kde.org/r/4451/</a>
</td>
</tr>
</table>
<br />
<pre>thanks for tackling this :)
there are other situations where the screen # may already be set - when you import a containment, either by starting a stopped activity or some other way. there are a couple of functions for that in libplasma (Corona iirc -load/importLayout?) that would need patching. you'd also have to apply the same logic to anywhere a *desktop* number could remain set, because PDV has the same problem (turn it on, remove a VD, add a VD, no view).
however, I'm thinking that this isn't the best way to solve it - you'd always be looking over your shoulder wondering if you'd missed a way for the screen or desktop # to get set. It might be better to do it the way that (iirc) panel views do it: when desktopcorona checks the screens, it fakes a containmentAdded, and that leads to plasmaapp putting the containment in the view-creation queue.
...or hell, maybe it would make more sense for plasmaapp to just ensure that the views exist as soon as the screen/desktop does, and trust the view and containment to find each other? take a step back and think about what would be most reliable and simple. The codebase for multiscreen/desktop has grown rather organically, and needs a bit of review now :)</pre>
<br />
<p>- Chani</p>
<br />
<p>On June 24th, 2010, 1:37 a.m., Anthony Bryant wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" style="background-image: url('http://reviewboard.kde.orgrb/images/review_request_box_top_bg.png'); background-position: left top; background-repeat: repeat-x; border: 1px black solid;">
<tr>
<td>
<div>Review request for Plasma.</div>
<div>By Anthony Bryant.</div>
<p style="color: grey;"><i>Updated 2010-06-24 01:37:15</i></p>
<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;">This patch fixes a few problems that occur when hotplugging screens:
1. On startup, existing containments are associated with a screen even if that screen does not exist.
This causes a bug when a screen is added: since the containment already thinks it is associated with the new screen,
it doesn't emit screenChanged() with the new screen, and doesn't get a view created for it.
To fix this, I've made Containment::setScreen() set the new screen to -1 if it doesn't exist.
2. When a screen is removed, a containment will remain associated with the screen that it is on, causing the same bug
as in 1 when the screen is added again.
To fix this, I've made sure a containment's screen is set to -1 when its view is removed by PlasmaApp.
3. PlasmaApp tries to connect to a nonexistent signal in Kephal: screenAdded(int), the real one is screenAdded(Kephal::Screen*)
I'm not completely sure that this is the best way of fixing these problems, please correct me if it isn't.</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;">Started plasma with and without an external screen and tried adding and removing it a few times.</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>/trunk/KDE/kdebase/workspace/plasma/desktop/shell/plasmaapp.h <span style="color: grey">(1141983)</span></li>
<li>/trunk/KDE/kdebase/workspace/plasma/desktop/shell/plasmaapp.cpp <span style="color: grey">(1141983)</span></li>
<li>/trunk/KDE/kdelibs/plasma/containment.cpp <span style="color: grey">(1141983)</span></li>
</ul>
<p><a href="http://reviewboard.kde.org/r/4451/diff/" style="margin-left: 3em;">View Diff</a></p>
</td>
</tr>
</table>
</div>
</body>
</html>