Review Request: Remove EngineObserver and replacing it with signals/slots for better thread safety

[Alex Merry]

> On 2010-10-31 20:14:08, Alex Merry wrote:
> > src/EngineController.h, line 117
> > <http://git.reviewboard.kde.org/r/100120/diff/1/?file=2895#file2895line117>
> >
> >     Delete stuff rather than commenting it :-)
> 
> Ralf Engels wrote:
>     It was unused (after my refactoring) and redundant as you can get the state from the media object.

But that doesn't change my comment - you should delete the code if it's not needed.  It can always be reclaimed from the git history.


- Alex


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On 2010-10-31 15:53:10, Ralf Engels wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/100120/
> -----------------------------------------------------------
> 
> (Updated 2010-10-31 15:53:10)
> 
> 
> Review request for Amarok.
> 
> 
> Summary
> -------
> 
> Remove EngineObserver and the observer pattern.
> Instead we have several new signals and functions in EngineController.
> Also the EngineController is now a MetaObserver for the current track and exporting the relevant signals.
> 
> This patch improves the tread safety and reduces the complexity of the code by a lot.
> Over 600 lines of codes could be removed while at the same time fixing the image update problems and several small problems where classes listened for the album meta changed but forgot that the album could change when a user changed the track.
> 
> 
> Diffs
> -----
> 
>   playground/src/context/applets/coverbling/CoverBlingApplet.h a3ff113 
>   playground/src/context/applets/coverbling/CoverBlingApplet.cpp a2a50e7 
>   playground/src/context/applets/video/Video.h 1d52f0b 
>   playground/src/context/applets/video/Video.cpp 8471497 
>   src/ActionClasses.h aa67ec7 
>   src/ActionClasses.cpp 61e8af8 
>   src/App.cpp e6006b9 
>   src/EngineController.h aae4503 
>   src/EngineController.cpp 65b3f2e 
>   src/KNotificationBackend.h 02cc9d8 
>   src/KNotificationBackend.cpp b98391c 
>   src/MainWindow.h 4593d47 
>   src/MainWindow.cpp 9102558 
>   src/TrayIcon.h d1ffd43 
>   src/TrayIcon.cpp 47f56bf 
>   src/amarokurls/AmarokUrlHandler.cpp 1d8cd46 
>   src/context/ContextView.h a3f36fb 
>   src/context/ContextView.cpp ccfe4f3 
>   src/context/applets/photos/PhotosApplet.h 4cac9ea 
>   src/context/applets/photos/PhotosApplet.cpp 0b47da9 
>   src/context/applets/similarartists/SimilarArtistsApplet.h 3a2d7ea 
>   src/context/applets/similarartists/SimilarArtistsApplet.cpp 0cf2c76 
>   src/context/applets/videoclip/VideoclipApplet.h a0704c6 
>   src/context/applets/videoclip/VideoclipApplet.cpp 789173e 
>   src/context/engines/current/CurrentEngine.h 0369065 
>   src/context/engines/current/CurrentEngine.cpp 2c32f75 
>   src/context/engines/labels/LabelsEngine.h 626a030 
>   src/context/engines/labels/LabelsEngine.cpp 65278b4 
>   src/context/engines/lyrics/LyricsEngine.h 771bf6f 
>   src/context/engines/lyrics/LyricsEngine.cpp 527cd0d 
>   src/context/engines/similarartists/SimilarArtistsEngine.h fea9bf5 
>   src/context/engines/similarartists/SimilarArtistsEngine.cpp 97bc109 
>   src/context/engines/upcomingevents/UpcomingEventsEngine.h c57b004 
>   src/context/engines/upcomingevents/UpcomingEventsEngine.cpp 66131fd 
>   src/context/engines/wikipedia/WikipediaEngine.h 5d53082 
>   src/context/engines/wikipedia/WikipediaEngine.cpp 4c65799 
>   src/core-impl/meta/stream/Stream_p.h cd217bf 
>   src/core-impl/meta/timecode/TimecodeObserver.h b727196 
>   src/core-impl/meta/timecode/TimecodeObserver.cpp dea809d 
>   src/core/CMakeLists.txt 5863ca1 
>   src/core/engine/EngineObserver.h 5a93062 
>   src/core/engine/EngineObserver.cpp 7d5728b 
>   src/dbus/mpris1/PlayerHandler.h 8f90f27 
>   src/dbus/mpris1/PlayerHandler.cpp 0afeb59 
>   src/dbus/mpris2/Mpris2DBusHandler.h a767c79 
>   src/dbus/mpris2/Mpris2DBusHandler.cpp 59afbf3 
>   src/dialogs/ScriptManager.h 6104dcf 
>   src/dialogs/ScriptManager.cpp e98f45f 
>   src/dynamic/BiasSolver.cpp bf8e3c8 
>   src/dynamic/biases/EchoNest.h 9a6ecc7 
>   src/dynamic/biases/EchoNest.cpp 16f26f4 
>   src/mac/GrowlInterface.h 3bb35d2 
>   src/mac/GrowlInterface.cpp 862d019 
>   src/playlist/PlaylistActions.h 035ff77 
>   src/playlist/PlaylistActions.cpp 2358b29 
>   src/playlist/PlaylistController.cpp d38c9d6 
>   src/playlist/view/listview/PrettyItemDelegate.cpp ab19ccc 
>   src/scriptengine/AmarokEngineScript.h 55e275c 
>   src/scriptengine/AmarokEngineScript.cpp 15f7b6e 
>   src/services/lastfm/ScrobblerAdapter.h ef7a7c1 
>   src/services/lastfm/ScrobblerAdapter.cpp 1b4da4a 
>   src/services/lastfm/biases/LastFmBias.h 6ba571d 
>   src/services/lastfm/biases/LastFmBias.cpp 4093104 
>   src/statemanagement/DefaultApplicationController.cpp 8205aab 
>   src/statusbar/StatusBar.h b785714 
>   src/statusbar/StatusBar.cpp 48df821 
>   src/toolbar/CurrentTrackToolbar.h c8293f3 
>   src/toolbar/CurrentTrackToolbar.cpp 22408ea 
>   src/toolbar/MainToolbar.h fc29ba2 
>   src/toolbar/MainToolbar.cpp abeedc6 
>   src/toolbar/SlimToolbar.h dcfaf22 
>   src/toolbar/SlimToolbar.cpp e69df7c 
>   src/toolbar/VolumePopupButton.h a0f5d56 
>   src/toolbar/VolumePopupButton.cpp fb5fcb1 
>   src/widgets/Osd.h b80b37e 
>   src/widgets/Osd.cpp af4b24b 
>   src/widgets/ProgressWidget.h 3fba490 
>   src/widgets/ProgressWidget.cpp 211cea7 
>   src/widgets/VolumeWidget.h 910e9f1 
>   src/widgets/VolumeWidget.cpp e1d01f1 
>   tests/core-impl/meta/multi/CMakeLists.txt 8a51249 
>   tests/playlist/CMakeLists.txt 01703fe 
> 
> Diff: http://git.reviewboard.kde.org/r/100120/diff
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Ralf
> 
>

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