I have three panels that must be vertically align. They must be collapsible too.
I want them to be automatically resized when the window size is change.
I thought an anchor layout to manage them would be my solution.
But when i collapse one of the panels, the two others don't use the remaining empty space.

So, Is there a solution to redefine anchor config property when a panel is collapsed ?
Or should i try something else (another layout?) ?