Don't accept drags outside the canvas

1 files changed, 7 insertions, 2 deletions

diff --git a/view.py b/view.py
index 66e29c7..8ba64ea 100644
--- a/view.py
+++ b/view.py
@@ -53,8 +53,13 @@ class MindMapView(Canvas):
         thought = kwargs['element']
         logging.debug('__dragging_finished_cb %r %r' % (x, y))
         thought.dragging = False
-        thought.model.x = x
-        thought.model.y = y
+        
+        rect = self.get_allocation()
+        thought_rect = thought.get_rect()
+        if (x >= 0 and x + thought_rect.width <= rect.width) and \
+                (y >= 0 and y + thought_rect.height <= rect.height):
+            thought.model.x = x
+            thought.model.y = y
 
     def set_model(self, new_model):
         logging.debug('set_model %r' % new_model)