Adding children to ContentSwitcher

[manforowicz]

Hello!

Question

How can I add a new child to a ContentSwitcher, without the content switcher immediately displaying it below its current child?

What I've tried

I tried calling content_switcher.mount(new_child). However, this caused the new child to immediately appear below the currently displayed child of the content switcher.

I did notice that the content switcher goes back to showing only one child after I've switched content_switcher.current to a different child ID.

Why I'm trying to do this

I'm making a utility to track nodes on a CAN bus. On the left side of my UI, I have a live list of nodes detected. Selecting an item should cause the content switcher on the right show info about the node. Nodes may appear or disappear at any time.

Relevant discussion

#2751 Allowed TabbedContent to add new children.

Thanks!

[manforowicz]

I found a solution!

I can properly add a new child to a content switcher by first setting its display property:

new_child = Foo()
new_child.display = False
content_switcher.mount(new_child)

Maybe it would be good to mention this in the documentation?

[TomJGooding]

You can instead use the ContentSwitcher.add_content method added in Textual v0.68 - see #4642.

However I spotted this is missing from the docs as they haven't been deployed for a few weeks. I've opened issue #4685 to flag this!

[manforowicz]

Thanks you!