Text mode UI

[qtxie]

A little text mode UI backend.

Features implemented:

• Styles: base, panel, button, field, text, progress, rich-text, image and text-list.
• Draw command: text. Both string! and rich-text! are supported.
• Keyboard handling. Only key-down and key events. They are the same event as the terminals only send a single key event.
• Mouse handling. Disable by default. Use system/view/platform/mouse-event?: yes to enable it.
• Image!
• Timer. Use /rate facets. The resolution of it is 30 ms.
• Facets supported: /offset, /size, /text, /image, /color, /data, /enabled?, /visible?, /selected, /flags, /options, /pane, /rate, /para and /draw.
• Limited ANSI escape codes support in /text facet. Only Colors / Graphics Mode codes.
• Use 256 colors for text. It should works fine on most of the terminals. Use Truecolor (24-bit RGB) for image rendering if the terminal supports it. Otherwise use 256 colors.
• Works on the big-3 platforms (Windows, macOS and Linux).

Same image shows in TUI and GUI backend respectively.

red-tui22.mp4

[dockimbel]

The changes in %VID.red are not good, they affect all platforms with any View backend...

[qtxie]

The changes in %VID.red are not good, they affect all platforms with any View backend...

Should the /tight flag be propagated to the child containers?

[dockimbel]

I'm not sure what the best default would be: to propagate or not to child panels/groups. Though, layout does not pass the /tight flag to fetch-options... /tight is just a shortcut for origin 0x0 space 0x0, so I think it's fine to make it propagate to children by default and let user switch to manually setting origin/space if that behavior is not wanted.

Your change in VID forces the tight mode in all cases (layout/parent/styles/tight), which is a regression. You should be using a dynamic refinement for that (e.g. layout/parent/styles/:tight?) and passing that flag somewhere to fetch-options.

[hiiamboris]

If it propagates, let user be able to manually override this propagated value with custom origin & space.