feat(ui): Add TextArea for auto-scrollable wrapped text support

[thewierdnut]

Feature

Add the ability to scroll the contents of a dialog

Summary

This PR adds the TextArea class, along with some Panel changes needed to support it. This class will wrap text to draw, and will automatically add controls to scroll it if needed.

As an initial implementation, I have used this TextArea to fix an issue in the Dialog class, which at high zoom levels can cause the dialog to be taller than the screen. This is easily reproducible by using the highest ui zoom level and scanning a carrier.

The TextArea can be used anywhere else where multiple lines of text need to be formatted and displayed, and can be modified in the future to handle RTL or BIDI text.

Screenshots

Before:

After:

textarea.mp4

Testing Done

Tested entry, ok-cancel, and ok dialogs using the scanner and the shop panel.

Performance Impact

This requires an extra texture allocation the same size as the dialog text, which gets freed when the dialog is dismissed. It will improve the cpu performance, as the rendered text will be cached from frame to frame if no scrolling has occurred.

[Hurleveur]

Code looks ok, I'll try to test it
Here are a few comments but I only took a quick look and dont know much about UI if I'm being honest

Edit: that showcase video looks good

[Hurleveur]

Just a small thing
I dont know enough about whats going on for dialog and the like to know if the inheritance is good how its currently implemented, might be good to get someone who knows about that
Probably not required to test it

[thewierdnut]

Just a small thing I dont know enough about whats going on for dialog and the like to know if the inheritance is good how its currently implemented, might be good to get someone who knows about that Probably not required to test it

Currently, the TextArea is its own class, and it only supports text. It may be useful in the future to extract a base class that allows you to render anything in the scrollable area, which might have been a useful way to render all of the checkboxes for the plugin list and other similar scrollable things. That would be a future merge though.

[TomGoodIdea]

style

[TomGoodIdea]

The dialog doesn't switch to using a TextArea when the game window is resized. Not necessarily a bug, but something that could be added for a better user experience. And I think the wide mode works the same (it's set in Dialog::Init, too), so we don't have to change it in this PR.

[TomGoodIdea]

Thank you!

[petervdmeer]

All open comments seem to be handled, and reviewers seem positive: Merging.