Add optional line numbers for TextEdit widget

[hunger]

Discussed in #7627

^{Originally posted by nic-obert February 13, 2025}
It would be nice to have a built-in option to show line numbers in the TextEdit widget. Or have a dedicated widget called something like TextEditLineNumbers that also allows you to style how the line numbers are displayed.
Such a feature would be useful when building a text editor of some sort or displaying numerous lines of text.

[hunger]

Let's track this properly :-)

[ogoffart]

I think TextEdit might not be the right widget to show code.
We might need a more complex editor that'd have support for showing line number, syntax highlighting and all the things. I'm just not sure if TextEdit is the right widget for that.

[FloVanGH]

I think TextEdit might not be the right widget to show code. We might need a more complex editor that'd have support for showing line number, syntax highlighting and all the things. I'm just not sure if TextEdit is the right widget for that.

Agree. I think it would make sense to have TextEdit as simple multi line text edit component as it is now and to add a RichTextEditor component for example with text formatting / heightening and (optional) line number. Or a RichTextEdit as same as TextEdit with multiple text formatting and a deriving element CodeEdit with syntax highlighting and line numbers.