Didn't even see Zonx's post when I posted.
This is what I have in my UI:
<Page Name="ToggleCureEffectsButtons" OnHide="Parent.Volume.CellSize=201,115" OnShow="Parent.Volume.CellSize=285,115"/>
These values cannot be auto-calculated from other elements. I need the possibility to configure them (the amount by which you want to shrink would be enough though, see my post above).
Alternatively if you go Zonx's way please give me a way to opt out of your hardcoding. I can't just rename all elements to get out of it because raid leaders need to be able to drag'n'drop raid members, and that functionality is hardcoded. Or at least give us the event upon mode change that Zonx asked for and allow me to undo your hardcoding via that...