Review Request 123833: Krita: Add basic modifier key support to selection tools.

[Boudewijn Rempt]

> On June 2, 2015, 7:39 a.m., Boudewijn Rempt wrote:
> > For the record: https://bugs.kde.org/show_bug.cgi?id=348234 is where we're tracking the issues with this patch. It's looking good, but there are still a few!

Ping? Did you have time to check the the report? I'd love for this patch to go in again... In time for 2.9.6!


- Boudewijn


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On May 26, 2015, 8:47 a.m., Michael Abrahams wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/123833/
> -----------------------------------------------------------
> 
> (Updated May 26, 2015, 8:47 a.m.)
> 
> 
> Review request for Calligra.
> 
> 
> Repository: calligra
> 
> 
> Description
> -------
> 
> This refactors polygonal, elliptical, and rectangular selection tools to use a basic selection tool template which unifies previously duplicated code. The template overrides the ability to execute alternate actions, but none of those tools supported alternate actions previously and the ellipse and rectangle were already overriding the modifier keys to begin with. 
> 
> Shift: add to selection
> Alt: subtract from selection
> Shift+Alt: intersect current selection
> Ctrl: replace selection
> 
> Certain key combinations allow users the ability to expose the modifier keys to the base tool, i.e. to make proportional / translated / scaled alterations using ctrl/alt/shift.
> 1) If the user *clicks first and then presses modifier keys*, those modifier keys will only alter the selection method.
> 2) If the user *presses modifier keys first and then clicks*, the selection method is locked in, and subsequent modifier keystrokes will change how the selection is drawn.
> 3) If the underlying tool *never takes modifier keys*, modifier keys will always alter the selection method. 
> 
> These rules can be defined systematically by modifying the template.
> 
> Things to do later: 
> + Basic functionality is implemented in KisToolSelectBase, which covers the outline, contiguous, similar color and path selection tools which inherit from KisToolSelectBase.  A more complete refactoring might define KisToolSelectBase via the selection tool template, but it is not simple for the path selection tool which uses a more complicated delegated design pattern.
> + The tools need new icons (e.g. little plus/minus symbols) to give users visual feedback when they activate the modifiers.
> + The Ctrl key should switch temporarily to the move tool, as in Photoshop.
> + Check idiomatic naming conventions, style, etc.
> 
> 
> Diffs
> -----
> 
>   krita/ui/tool/kis_tool_polyline_base.cpp 6071f76 
>   krita/ui/tool/kis_tool_polyline_base.h f681fd8 
>   krita/ui/tool/kis_tool_paint.h 128dce9 
>   krita/ui/tool/kis_tool.h e852311 
>   krita/ui/tool/kis_tool.cc b299b81 
>   krita/ui/input/kis_alternate_invocation_action.cpp 48723bf 
>   krita/ui/input/kis_alternate_invocation_action.h b47c59e 
>   krita/ui/CMakeLists.txt 1caef14 
>   krita/plugins/tools/selectiontools/kis_tool_select_similar.cc b2c51d9 
>   krita/plugins/tools/selectiontools/kis_tool_select_similar.h f701986 
>   krita/plugins/tools/selectiontools/kis_tool_select_rectangular.cc 331c6a4 
>   krita/plugins/tools/selectiontools/kis_tool_select_rectangular.h 5e88766 
>   krita/plugins/tools/selectiontools/kis_tool_select_polygonal.cc 9acca50 
>   krita/plugins/tools/selectiontools/kis_tool_select_polygonal.h feee9cb 
>   krita/plugins/tools/selectiontools/kis_tool_select_path.cc 9f1a65c 
>   krita/plugins/tools/selectiontools/kis_tool_select_path.h a67b584 
>   krita/plugins/tools/selectiontools/kis_tool_select_outline.cc 46cca47 
>   krita/plugins/tools/selectiontools/kis_tool_select_outline.h 4756870 
>   krita/plugins/tools/selectiontools/kis_tool_select_elliptical.cc 999f1a0 
>   krita/plugins/tools/selectiontools/kis_tool_select_elliptical.h 7b2cd2f 
>   krita/plugins/tools/selectiontools/kis_tool_select_contiguous.cc 5bd4d2f 
>   krita/plugins/tools/selectiontools/kis_tool_select_contiguous.h 26310e2 
>   krita/image/kis_selection.h 6376f874 
>   CMakeFiles/2.8.12.1/CMakeDetermineCompilerABI_CXX.bin PRE-CREATION 
>   krita/ui/tool/kis_tool_rectangle_base.h a0b470c 
>   krita/ui/tool/kis_tool_rectangle_base.cpp 8e091d0 
>   krita/ui/tool/kis_tool_select_base.h 500d6dd 
>   krita/ui/tool/kis_tool_select_base.cpp 40779ad 
> 
> Diff: https://git.reviewboard.kde.org/r/123833/diff/
> 
> 
> Testing
> -------
> 
> There are no tests targeting the individual selection tools, but the tests for other individual tools passed.
> 
> The ability to add, subtract and intersect complicated shapes quickly exposes some bugs in how the selection marquees are drawn: sometimes extra lines are drawn, sometimes lines fail to be drawn.
> 
> 
> Thanks,
> 
> Michael Abrahams
> 
>

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