Added a -catchevent attribute that specifies whether an item should handle

events or act as a decorating object. Groups can be controlled too, there catching
state propagates to their children.

1 files changed, 9 insertions, 2 deletions

diff --git a/generic/Group.c b/generic/Group.c
index ce581a8..c4fef66 100644
--- a/generic/Group.c
+++ b/generic/Group.c
@@ -72,6 +72,9 @@ static ZnAttrConfig     group_attrs[] = {
   { ZN_CONFIG_BOOL, "-atomic", NULL,
     Tk_Offset(GroupItemStruct, header.flags), ATOMIC_BIT,
     ZN_REPICK_FLAG, False },
+  { ZN_CONFIG_BOOL, "-catchevent", NULL,
+    Tk_Offset(GroupItemStruct, header.flags), ZN_CATCH_EVENT_BIT,
+    ZN_REPICK_FLAG, False },
   { ZN_CONFIG_ITEM, "-clip", NULL,
     Tk_Offset(GroupItemStruct, clip), 0,
     ZN_COORDS_FLAG|ZN_ITEM_FLAG, False },
@@ -121,6 +124,7 @@ Init(ZnItem             item,
   group->dependents = NULL;
   SET(item->flags, ZN_VISIBLE_BIT);
   SET(item->flags, ZN_SENSITIVE_BIT);
+  SET(item->flags, ZN_CATCH_EVENT_BIT);
   SET(item->flags, ZN_COMPOSE_ALPHA_BIT);
   SET(item->flags, ZN_COMPOSE_ROTATION_BIT);
   SET(item->flags, ZN_COMPOSE_SCALE_BIT);
@@ -1240,12 +1244,15 @@ Pick(ZnItem     item,
 
   for ( ; current_item != ZN_NO_ITEM; current_item = current_item->next) {
     /*
+     * If an item doesn't catch events it can be safely skipped 
+     * right now.
      * Sensitive item must be reported even if they are invisible.
      * It is legal to fire bindings on invisible sensitive items.
      * This is _not_ a bug do _not_ modify the test below.
      */
-    if (ISCLEAR(current_item->flags, ZN_SENSITIVE_BIT) &&
-        ISCLEAR(current_item->flags, ZN_VISIBLE_BIT)) {
+    if (ISCLEAR(current_item->flags, ZN_CATCH_EVENT_BIT) ||
+        (ISCLEAR(current_item->flags, ZN_SENSITIVE_BIT) &&
+         ISCLEAR(current_item->flags, ZN_VISIBLE_BIT))) {
       continue;
     }
     ZnIntersectBBox(&bbox, &current_item->item_bounding_box, &inter);