full IDisposable implementation (#34)

* full implementation of IDisposable, not stable, lock and still leaking

* override dispose in popper to handle _content not yet in graphic tree (when never shown), test focusedWidget when disposing

* prevent canceling thread multiple times causing a deadlock

* test parent type when trying to close window

1 files changed, 6 insertions, 1 deletions

diff --git a/src/GraphicObjects/Window.cs b/src/GraphicObjects/Window.cs
index e0c97ea9..176e8d90 100644
--- a/src/GraphicObjects/Window.cs
+++ b/src/GraphicObjects/Window.cs
@@ -391,7 +391,12 @@ namespace Crow
 
 		protected void close(){
 			Closing.Raise (this, null);
-			currentInterface.DeleteWidget (this);
+			if (Parent is Interface)
+				(Parent as Interface).DeleteWidget (this);
+			else if (Parent is Group)
+				(Parent as Group).RemoveChild (this);
+			else if (Parent is PrivateContainer)
+				(Parent as Container).Child = null;
 		}
 	}
 }