Fix double-click-to-zoom issue with previous position

Douple click to zoom an item and double-clicking again should now always correctly go back to the previous position.

CHANGELOG.rst

@@ -1,3 +1,14 @@
+0.1.1 - (unreleased)
+====================
+
+Fixed
+-----
+
+* Douple click to zoom an item and double-clicking again should now always
+  correctly go back to the previous position
+
+
+
 0.1.0 - 2021-07-10
 ==================
 

beeref/view.py

@@ -468,6 +468,8 @@ class BeeGraphicsView(QtWidgets.QGraphicsView, ActionsMixin):
         width higher on top and bottom. This gives the impression of
         an infinite canvas."""
 
+        if self.previous_transform:
+            return
         logger.debug('Recalculating scene rectangle...')
         try:
             topleft = self.mapFromScene(