Box hits now works both directions

clusterview/opengl_widget.py

@@ -286,6 +286,16 @@ def box_hit(tx, ty, x1, y1, x2, y2):
     @param x2 The bottom left x.
     @param y2 The bottom left y.
     """
+
+    # The box in this case is flipped - the user started at the bottom right
+    # corner. Pixel-wise top left is (0, 0) and bottom right is
+    # (screen_x, screen_y)
+    if x1 > x2 and y1 > y2:
+        return (tx <= x1 and
+                tx >= x2 and
+                ty <= y1 and
+                ty >= y2)
+
     return (tx >= x1 and
             tx <= x2 and
             ty >= y1 and
@@ -309,10 +319,6 @@ def highlight_selection():
                    bottom_right[0], bottom_right[1]):
 
             # Paint the point and draw over it.
-            # TODO: After the mouse drag drop these highlighted points should be
-            #       stored in a move set. Make sure to update these in a set
-            #       dropping each as it doesn't make the hit condition anymore.
-            #
             #
             # TODO: Demonstrating movement might be difficult... come up with a
             #       good way on paper. Basically once the mouse release happens