Add index to Tree widget's add

[davetapley]

Presently there is no way to add a new tree node except as the last node, accordingly:

Would you accept an optional indexhere?

textual/src/textual/widgets/_tree.py

Lines 320 to 327 in ce96219

	def add(
	self,
	label: TextType,
	data: TreeDataType | None = None,
	*,
	expand: bool = False,
	allow_expand: bool = True,
	) -> TreeNode[TreeDataType]:

If set it would change this from append to insert and pass index:

textual/src/textual/widgets/_tree.py

Line 344 in ce96219

self._children.append(node)

[github-actions]

We found the following entries in the FAQ which you may find helpful:

• How do I center a widget in a screen?
• Does Textual support images?

Feel free to close this issue if you found an answer in the FAQ. Otherwise, please give us a little time to review.

This is an automated reply, generated by FAQtory

[willmcgugan]

Would that cover all use-cases? What if you want to insert before another item, or at the start.

The mount method has a before and after parameter. Maybe we need something similar.

[davetapley]

@willmcgugan it would, but the caller would be responsible for figuring out the index.

[darrenburns]

This would be useful 👍

When adding a new node at a level of the tree that contains many siblings, it can be really jarring having it appear right at the bottom (and causing scrolling to occur).

[github-actions]

Don't forget to star the repository!

Follow @textualizeio for Textual updates.