Recalculate edge properties when shapes are refreshed

Shape sizes can change (if you're actively editing a shape), which can
mean that some edge properties need to be recalculated.

We do this at the graph, rather than edge, level to avoid the overhead
of installing a notification for every single edge.

1 files changed, 5 insertions, 0 deletions

diff --git a/tikzit/src/common/Edge.h b/tikzit/src/common/Edge.h
index 64da138..accf38c 100644
--- a/tikzit/src/common/Edge.h
+++ b/tikzit/src/common/Edge.h
@@ -274,6 +274,11 @@ typedef enum {
 - (id)initWithSource:(Node*)s andTarget:(Node*)t;
 
 /*!
+ @brief      Force the recalculation of the derived properties.
+ */
+- (void)recalculateProperties;
+
+/*!
  @brief      Recompute the control points and midpoint.
  */
 - (void)updateControls;