SplitContainer dragger does nothing when dragged if the container is too small

[rambda]

Godot version

3.4.stable

System information

Windows 10, GLES3

Issue description

SplitContainer dragger doesn't work in sub-viewport.

Steps to reproduce

1. set up ViewportContainer - Viewport - HSplitContainer/VSplitContainer (or Use ViewportTexture on TexutreRect/Meshes and viewport.input(event) to forward inputs).
2. drag SplitContainer's dragger.
3. will not change size of SplitContainer's children.

Minimal reproduction project

SplitContainerBug.zip

[kleonc]

SplitContainers in your example can't resize their children just because of the minimum sizes they need to respect. If you'd make these containers bigger you'd be able to drag the children.

Showing the minimum possible size:

For minimum size you can't drag:

For bigger size it works just fine:

The same holds for subviewports:

[graydwarf]

The expected behavior of a splitter is for children to shrink as much as possible and then wrap or get clipped when they won't shrink any more. The children of a splitters containers should have no say in what the splitter can or can't do. The ability to reduce the width should not be blocked outside of the splitters own min_size.x restrictions. Like many others, I now have to roll my own splitter to do what this one should already do.

[Calinou]

Like many others, I now have to roll my own splitter to do what this one should already do.

Please post the code for those splitter implementations (or the one you're writing) 🙂