* Added a basic tool tip API, and implementation.

* The BView API can probably be regarded as good enough; the implementation
  might need to be improved over time (also, some things as archivability
  aren't fully implemented yet). The ToolTip.h header should get public once
  finalized.
* Added new B_MOUSE_IDLE message that is sent to a BView after a certain
  time has passed (BToolTipManager::ShowDelay()).
* Added small test app (ToolTipTest) that shows what is already working.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32078 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/binary_compatibility/Global.h

@@ -20,7 +20,8 @@ enum {
 	PERFORM_CODE_GET_HEIGHT_FOR_WIDTH	= 1005,
 	PERFORM_CODE_SET_LAYOUT				= 1006,
 	PERFORM_CODE_INVALIDATE_LAYOUT		= 1007,
-	PERFORM_CODE_DO_LAYOUT				= 1008
+	PERFORM_CODE_DO_LAYOUT				= 1008,
+	PERFORM_CODE_GET_TOOL_TIP_AT		= 1009
 
 	// support kit
 };