Review Request 107983: Fix KWindowSystem::compositingChanged signal

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http://git.reviewboard.kde.org/r/107983/
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(Updated May 27, 2013, 6:14 p.m.)


Status
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This change has been marked as submitted.


Review request for kdelibs, kwin, Plasma, Aaron J. Seigo, Fredrik Höglund, Martin Gräßlin, and Marco Martin.


Description
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It works fine here (tested so far KWindowSystem signal, KSelectionWatcher only with kwin) with kwin (shift+alt+f12), xcompmgr, compiz & "metacity -c" and e17.
Didn't try xfce nor mutter.

Technically:
I do not at all understand why KWindowSystem is *not* watching the root window - KSelectionOwner for one is sending events to the root and this also seems the case for all other WMs (at least everything now starts to cause the signal to be emitted)

The KSelectionWatcher failure seems to be kwin specific (wrote me a cleaner testcase), there'll be some X11 event processing on top that eats away the client messages.
So this one can be scratched from the patch, the KWindowSystem issue remains.


This addresses bug 179042.
    http://bugs.kde.org/show_bug.cgi?id=179042


Diffs
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  kdeui/windowmanagement/kwindowsystem_x11.cpp f9b3cc1 

Diff: http://git.reviewboard.kde.org/r/107983/diff/


Testing
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see summary


File Attachments
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testcase
  http://git.reviewboard.kde.org/media/uploaded/files/2013/01/04/selectionwatcher.cpp


Thanks,

Thomas Lübking

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