Scatterplot & BarChart: initial brushing mechanism.

* Both components now support brushing (support in Scatterplot for
  activating a brush is still incomplete, though it can be brushed
  on by other components)
* Added a handler for linking the brushing between components
* Added crosshair geometry handler to geometry lib
* Fixed issue #15

1 files changed, 6 insertions, 0 deletions

diff --git a/geometry.h b/geometry.h
index b29e41f..eb4e05d 100644
--- a/geometry.h
+++ b/geometry.h
@@ -10,4 +10,10 @@ void updateCircleGeometry(QSGGeometry *geometry, float radius, float cx, float c
 // Rect
 void updateRectGeometry(QSGGeometry *geometry, float x, float y, float w, float h);
 
+// Crosshair
+void updateCrossHairGeometry(QSGGeometry *geometry,
+                             float x,
+                             float y,
+                             float thickness,
+                             float length);
 #endif // GEOMETRY_H