Computed Layout: Pos.Left/Top/Bottom/Right(Win) throws exception

			var defaultButton = new Button ("Quit") {
				X = Pos.Center (),
				// BUGBUG: Throws an exception
				Y= Pos.Bottom(Win),

System.Exception: ‘There is a recursive cycle in the relative Pos/Dim in the views of ContentView()({X=1,Y=1,Width=95,Height=18})’

If Y= Pos.Bottom(Win) is changed to Y= Pos.Bottom(Win) - 0 or Y= Pos.Bottom(Win) - 1 it does not fault.

While Y= Pos.Bottom(Win) is outside of Win this is actually not a valid thing to do, but it should not throw an exception, right?

This repros for Left, Top, Bottom, and Right.

[tig]

No, the logic is right. If you don’t Add you’ll get this same error.

[BDisp]

System.InvalidOperationException: 'TopologicalSort (for Pos/Dim) cannot find Window()({X=0,Y=0,Width=120,Height=30}). Did you forget to add it to ContentView()({X=1,Y=1,Width=118,Height=28})?'

Wasn’t it supposed to be the other way around? It should notify that it forgot to add ContentView to the Window. It seems that there is some inversion here.