Make it possible to write a selection tool #122

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opened 2025-06-30 14:53:57 +02:00 by riki · 1 comment

riki commented

2025-06-30 14:53:57 +02:00

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This is a tracking issue for the current rakugaki usability benchmark as a Worthy Image Editor (#120).

The goal is to implement a selection brush, which acts and feels like the selection tool in other image editors. It must have the following features:

The ability to take a rectangular area and "lift" it off the canvas. This means the area can then be moved around, scaled, or deleted.
- When there's a selection active, it should be possible to use the usual shortcuts—Esc, Del, Ctrl-C, Ctrl-X, known from other image editors to manipulate the selected part of the image.
It should also be possible to paste an image onto the canvas using Ctrl-V, triggering the selection.

My current vision for a selection brush would be the following:

pasteImage: \image, r ->
  editRect r \r' ->
    paint c r'

selectRect \r ->
  c = capture r
  [
	blend Erase (fill #000 r)
	editRect r \r' ->
	  paint c r'
  ]

Tasks that need to be done:

#123 selectRect and editRect reticles
#31 blend
#124 capture and paint
TODO tasks for keyboard shortcuts

This is a tracking issue for the current rakugaki usability benchmark as a Worthy Image Editor (#120). The goal is to implement a selection brush, which acts and feels like the selection tool in other image editors. It must have the following features: - The ability to take a rectangular area and "lift" it off the canvas. This means the area can then be moved around, scaled, or deleted. - When there's a selection active, it should be possible to use the usual shortcuts—Esc, Del, Ctrl-C, Ctrl-X, known from other image editors to manipulate the selected part of the image. - It should also be possible to paste an image onto the canvas using Ctrl-V, triggering the selection. My current vision for a selection brush would be the following: ```haku pasteImage: \image, r -> editRect r \r' -> paint c r' selectRect \r -> c = capture r [ blend Erase (fill #000 r) editRect r \r' -> paint c r' ] ``` Tasks that need to be done: - [ ] https://src.liquidev.net/riki/rkgk/issues/123 `selectRect` and `editRect` reticles - [ ] https://src.liquidev.net/riki/rkgk/issues/31 `blend` - [ ] https://src.liquidev.net/riki/rkgk/issues/124 `capture` and `paint` - [ ] TODO tasks for keyboard shortcuts

riki referenced this issue

2025-06-30 14:54:35 +02:00

rakugaki as a Worthy Image Editor #120

riki added the

labels 2025-06-30 15:04:10 +02:00

riki commented

2025-09-05 10:36:51 +02:00

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Thinking about keyboard shortcuts: how do we make pasteImage be triggered by a keyboard shortcut globally?

Idea: we gather all brushes with a pasteImage function. Ctrl-V always triggers the built-in selection, but the user may press Ctrl-Shift-V to show a context menu allowing you to pick the brush to paste the image with.

Thinking about keyboard shortcuts: how do we make `pasteImage` be triggered by a keyboard shortcut globally? Idea: we gather all brushes with a `pasteImage` function. Ctrl-V always triggers the built-in selection, but the user may press Ctrl-Shift-V to show a context menu allowing you to pick the brush to paste the image with.