|  | GL Studio C++ Runtime API
    | 
#include <disti_metadata.h>
 
  
 | Public Member Functions | |
| void | Call (DistiAttributeBase &ev) | 
| virtual bool | IsValid () const | 
Template for an AttributeCallbackBase that will call a class method whenever the attribute changes. The class must implement WeakReferenceable. Don't use this directly, use CreateAttributeMethodCallback instead.
| 
 | inlinevirtual | 
call the callback with the provided display event
Implements AttributeObserver.
| 
 | inlinevirtual | 
When IsValid is false, then this AttributeObserver can be deleted.
Implements AttributeObserver.