[Kde-hardware-devel] Review Request 121798: KScreen fade effect connector for PowerDevil

[Kai Uwe Broulik]

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Review request for Solid, Àlex Fiestas and Martin Gräßlin.


Bugs: 340063
    https://bugs.kde.org/show_bug.cgi?id=340063


Repository: powerdevil


Description
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This is an implementation of the client side of the KScreen effect for PowerDevil eventually allowing it to fade the screen before going to sleep. The code is loosely based on Alex' initial work [1] but ported to XCB.

[1] http://quickgit.kde.org/?p=libkscreen.git&a=commit&h=70cf4482ed2e83d14c2ec9b805921ba4eb741082


Diffs
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  daemon/CMakeLists.txt f26f786 
  daemon/config-powerdevil.h.cmake b730cd9 
  daemon/kwineffect.h PRE-CREATION 
  daemon/kwineffect.cpp PRE-CREATION 

Diff: https://git.reviewboard.kde.org/r/121798/diff/


Testing
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Calling start() causes the scren to dim, the state is properly updated by KWin and the respective signals are fired.

As for the implementation in the suspendsession action I have to agree with Martin here that we should drop the support for locking on non-logind platforms since it makes the code utterly complex and isn't secure anyway. That way PowerDevil could just kick off the fade effect, wait for it to be done and then tell Logind to suspend which completely takes care of the locking (and more importantly the waiting for the lock to be established *before* powering down).


Thanks,

Kai Uwe Broulik

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