MultilineTextInput: Scroll to end of text

[MarkusPiotrowski]

Does one have some control about the view of a MultilineTextInput field? Can I programmatically scroll down to the end of the text?

Edit: scroll_to_bottom and scroll_to_top have been implemented in version 0.3.0.

[freakboy3742]

Not at present.

The Table and Tree widgets have a scroll_to_top/bottom/row() API; I suspect a similar API would work for MultilineTextInput as well. If someone were to submit a PR implementing it, I doubt there would be much argument on accepting it.

[MarkusPiotrowski]

I found a way to implement this (scroll_to_bottom and probably also scroll_to_top) for Windows (toga_winforms\widgets\multilinetextinput.py). Is it necessary for a PR to implement it for all supported platforms? What can I do, how should I proceed?
I also have a MacBook and a Linux laptop available, so possibly I could supply implementations for these platforms later, too.

[freakboy3742]

You don't have to have a fully functioning implementation for every platform; however, if you're adding a new method that backend APIs will be required to implement, you do need to define a stub of that API on every backend.

If you add any new backend methods to the dummy backend first, all the actual platform backends will start failing their tests. You can then populate the Winforms backend with a real implementation, and put in a "not implemented" implementation on other platforms (see Table.clear() on winforms for an example of how this is done).