Standard BorderLayout example:
- Collapse west region.
- Collapse sourth region.
- Float (slide-in) west region.
- West region has wrong size.
This is caused by the fact that the layout still thinks the west region is collapsed, so it doesn't do a layout.
My patch solved this adding an extra isSlid property to a panel and changes onLayout to also do a layout if the panel is collapsed, but has isSlid set.