New category on NSResponder to find the responder for a given action, and find an item of a particular class in the responder chain.

Add method on NSMenu category to enable or disable all items (potentially recursing into submenus).

camino/src/extensions/NSMenu+Utils.h

@@ -46,6 +46,10 @@
 // turning on the one with the given unmasked tag value.
 - (void)checkItemWithTag:(int)unmaskedTag inGroupWithMask:(int)tagMask;
 
+// enable or disable all items in the menu including and after inFirstItem,
+// optionally recursing into submenus.
+- (void)setAllItemsEnabled:(BOOL)inEnable startingWithItemAtIndex:(int)inFirstItem includingSubmenus:(BOOL)includeSubmenus;
+
 @end
 
 

camino/src/extensions/NSMenu+Utils.m

@@ -67,6 +67,22 @@
   }
 }
 
+- (void)setAllItemsEnabled:(BOOL)inEnable startingWithItemAtIndex:(int)inFirstItem includingSubmenus:(BOOL)includeSubmenus
+{
+  NSArray* menuItems = [self itemArray];
+
+  int i;
+  for (i = inFirstItem; i < [menuItems count]; i ++)
+  {
+    id<NSMenuItem> curItem = [self itemAtIndex:i];
+    [curItem setEnabled:inEnable];
+    if (includeSubmenus && [curItem hasSubmenu])
+    {
+      [[curItem submenu] setAllItemsEnabled:inEnable startingWithItemAtIndex:0 includingSubmenus:includeSubmenus];
+    }
+  }
+}
+
 @end