I want to achieve the layout seen in the attached image.
I would like it to act like this:
Pane 1 is static, it can be closed but not moved. If closed the other panes move up.
All other panes are optional (can be shown or hidden) and they exist vertically stacked in 2 equal width columns.
User can close one or more, move them up or down in a column, or move them from the left column to the right, and vice-versa.
After playing with the dock panel I'm beginning to believe it may not be the right control for this; a grid with two stack panels would work, but I want to be able to drag panes around as described above.