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, 9 insertions, 0 deletions

diff --git a/src/GraphicObjects/Popper.cs b/src/GraphicObjects/Popper.cs
index 3ba6d711..d6e36346 100644
--- a/src/GraphicObjects/Popper.cs
+++ b/src/GraphicObjects/Popper.cs
@@ -240,5 +240,14 @@ namespace Crow
 			}
 			Unpoped.Raise (this, e);
 		}
+
+		protected override void Dispose (bool disposing)
+		{
+			if (_content != null && disposing) {
+				if (_content.Parent == null)
+					_content.Dispose ();
+			}
+			base.Dispose (disposing);
+		}
 	}
 }