c2c780666cf30f764fe4eb81b7fad350b0a7391a
kate
  Thu Mar 8 15:56:39 2018 -0800
Add trackDb setting to indicate if there is a direction to the interaction (interactDirectional). refs #17512

diff --git src/hg/inc/interactUi.h src/hg/inc/interactUi.h
index 2e38b46..950ae25 100644
--- src/hg/inc/interactUi.h
+++ src/hg/inc/interactUi.h
@@ -1,26 +1,31 @@
 /* interact track UI */
 
 /* Copyright (C) 2018 The Regents of the University of California 
  * See README in this or parent directory for licensing information. */
 
 #ifndef INTERACT_UI_H
 #define INTERACT_UI_H
 
 #define INTERACT_HEIGHT "heightPer"
 #define INTERACT_MINHEIGHT 20
 #define INTERACT_MAXHEIGHT 300
 #define INTERACT_DEFHEIGHT "200"
 #define INTERACT_MINSCORE "minScore"
 #define INTERACT_DEFMINSCORE "0"
 
+#define INTERACT_DIRECTIONAL    "interactDirectional"
+
 #define INTERACT_DRAW           "draw"
 #define INTERACT_DRAW_LINE      "line"
 #define INTERACT_DRAW_ELLIPSE   "ellipse"
 #define INTERACT_DRAW_CURVE     "curve"
 #define INTERACT_DRAW_DEFAULT   INTERACT_DRAW_CURVE
 
 void interactCfgUi(char *database, struct cart *cart, struct trackDb *tdb, char *track,
                         char *title, boolean boxed);
-/* Bar chart track type */
+/* Configure interact track type */
+
+boolean interactUiDirectional(struct trackDb *tdb);
+/* Determine if interactions are directional */
 
 #endif