Make Selection in Inkscape prettier

The scope of this MR has expanded to all the tools using selection. This should be possible with minor changes to this MR as most of the code is shared.

For a more complete picture of selection in various tools, one can refer to ux#239. The description below only covers two tools.

Addreses:

inbox#9940 (moved)

Inkscape currently has two selection boxes (the rectangle stroke that is drawn when the mouse is drag and dropped while using the Select tool):

• Default
• Touch

These look like the following (as of Inkscape 1.3.2 (091e20ef0f, 2023-11-25)):

mode	screenshot
Default
Touch

The proposed designs after this change (with help from @adam.belis ):

mode	screenshot
Default
Touch

The Node tool also has an additional "Lasso" mode which can be used select nodes by drawing a path around them while holding the Alt key. Current (as of Inkscape 1.3.2 (091e20ef0f, 2023-11-25))

Proposed:

(This "Lasso" mode is shared by Selector tool as well, although for Selector tool, it behaves like Touch selection box - any object the path touches is selected) For the Selector tool, the proposed design is just a dashed stroke without any fill or pattern. This is not yet implemented.

The original mockup by Adam:

Left one is the default, right one's touch

added ToolSelect label

added improvement label and removed ToolSelect label

added ToolSelect label

"Touch selection" rectangle with stripes is clear enough, I'd suggest to use solid stroke for both.

added 1 commit

• f3718442 - Apply 1 suggestion(s) to 1 file(s)

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added 3 commits

• 70090569 - Use C++ interface of Cairo instead of C interface
• 55aeb292 - Remove dashes from touch mode selection box
• 312b015d - Add fill and fill pattern to touchpath selection

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changed the description

requested review from @adam.belis

mentioned in issue ux#239

added 1 commit

• 639bfcb4 - Fix data race by not setting the pattern matrix

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