Review Request: Add an option for disabling / enabling the selection marker in the FolderView applet

[Commit Hook]

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This review has been submitted with commit d6293cad6468a24c5e3292a61207d0658ff21306 by Ignat Semenov to branch KDE/4.8.

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On Jan. 3, 2012, 5:21 p.m., Ignat Semenov wrote:
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> http://git.reviewboard.kde.org/r/103618/
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> (Updated Jan. 3, 2012, 5:21 p.m.)
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> 
> Review request for Plasma, Aaron J. Seigo and Peter Penz.
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> Description
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> This patch implements a proposal from the Netrunner project (netrunner-os.com), a KUbuntu derivative, aimed at polishing the KDE desktop, as part of my work for the project.
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> This feature allows the user to hide the "+" selection marker in the FolderView applet. It is absolutely symmetrical to the "Click to view folder" feature. The code is similar as well. One thing I had to change is the button hiding logic in ActionOverlay. The selection marker is positioned above the folder peek button, so it needs a QGraphicsGridLayout::removeItem() / ::addItem() instead of a QWidget::hide(), performed every time on the entered() event. As the ::removeItem() has to be called only once, I had to implement a public function that would toggle the button hiding / unhiding.
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> Then, to be symmetrical, I changed the folder peek button hiding code to use the same functions, with the same public interface in the ActionAoverlay class.
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> I hope the function addition is OK and does not violate neither incapsultion nor the KDE class design principles.
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> Diffs
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>   plasma/applets/folderview/actionoverlay.h 056c83b 
>   plasma/applets/folderview/actionoverlay.cpp 430e6dc 
>   plasma/applets/folderview/folderview.h c8869b4 
>   plasma/applets/folderview/folderview.cpp d620a7d 
>   plasma/applets/folderview/iconview.h 677aa76 
>   plasma/applets/folderview/iconview.cpp abf775e 
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> Diff: http://git.reviewboard.kde.org/r/103618/diff/diff
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> Testing
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> Works fine.
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> The only problem is that following a recent Aaron's commit regarding configChanged() / configAccepeted() in the FolderView applet circa 2 weeks ago, the settings in this applet are applied only on Plasma restart and not on the fly after hitting the Appy or Ok buttons. Aaron, please, have a look into this. This happens with any settings, not onyl the ones I added. (My settings code is absolutely identical to the "Click to view folder" settigns code).
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> Thanks,
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> Ignat Semenov
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