Review Request 110429: Patch that implements resource categorizing via tags.

[Sascha Suelzer]

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http://git.reviewboard.kde.org/r/110429/
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(Updated May 14, 2013, 9:57 p.m.)


Review request for Calligra.


Changes
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Prevent adding tags to the dropdown box with duplicate names.


Description
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Hi. :)

I've attached a patch that improves the way the user can organize
resources into named sets that can be added, deleted and chosen from a
drop down menu that I've added to KoResourceItemChooser. This made the
changes available to the paintoppreset choosers, the gradient choosers
and the pattern choosers.

Currently only adding and deleting categories is supported, renaming them
is in the code but lacks an UI feature, which I was unable to implement.
(I wanted the unfiltered view to be immutable and tried dis and enabling
the editable state of the drop down box based on which index was active,
but that introduced a segfault.)
All in all the UI parts I've written aren't exactly amazing, maybe
someone more experienced can take care of that.

I have removed the `show all' checkbox in the paintop preset docker and
all references to that functionality since it made filtering a bit more
complicated as well as just not making too much sense with the
improvements to the tagging system.

I have also removed the proxy adapter in KisPresetChooser since it
didn't do anything useful after these changes, yet required attention
since it overloaded some now improved functions.

Current shortcomings of the system:
- Since I used the already existing KoResourceTagging class to handle all
 the tagging bits, and ultimately save tags to disk, in alphabetical
 order, restarting Krita, and thus repopulating the combo boxes also
 fills them in alphabetical order and not in the order they might have
been defined by the user.
- No way to assign resources to tags with the mouse. Textual filtering
 works but isn't exactly friendly for pin point single changes.
 A right click -> add resource to tag x would be friendlier.
- UI bits are awkward, especially adding a new tag in a pop-up chooser.
 The brush preset docker works fine since it stays visible without focus.
 Gradient and pattern popups close when asked for a name for the new tag
 since I used an input dialog after failing to implement it with combobox
 editing.

I also had a crash at one point in time where some brush presets got
changed around in master and clicking some resources in the brush preset
box crashed the program, but I was not able to reproduce that after a
clean rebuild of my local workspace and changing presets around
externally, so it might not be an issue, but I'm including it for
completeness sake.


Diffs (updated)
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  libs/widgets/KoResourceItemChooser.cpp 61273fe 

Diff: http://git.reviewboard.kde.org/r/110429/diff/


Testing
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I have only tested for Krita, no problems I could detect.


Thanks,

Sascha Suelzer

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