diff -r 394f3b06dba1 -r 29b2821d1262 ui/ui/tree.h
--- a/ui/ui/tree.h	Thu May 15 22:13:25 2014 +0200
+++ b/ui/ui/tree.h	Fri May 16 16:19:46 2014 +0200
@@ -35,7 +35,8 @@
 extern "C" {
 #endif
 
-typedef struct UiModelInfo UiModelInfo;
+typedef struct UiModelInfo     UiModelInfo;
+typedef struct UiListSelection UiListSelection;
 
 typedef enum UiModelType UiModelType;
 
@@ -73,14 +74,31 @@
     /*
      * selection callback
      */
-    ui_callback callback;
+    ui_callback activate;
+    
+    /*
+     * cursor callback
+     */
+    ui_callback selection;
     
     /*
-     * userdata for callback
+     * userdata for both callback
      */
     void *userdata;
 };
 
+struct UiListSelection {
+    /*
+     * number of selected items
+     */
+    int count;
+    
+    /*
+     * indices of selected rows
+     */
+    int *rows;
+};
+
 UiModelInfo* ui_model_info(UiContext *ctx, ...);
 void ui_model_info_free(UiContext *ctx, UiModelInfo *mi);