ComponentDataObserverTComponent, TData Methods

Register listener at target to be informed if its value changed. The target is already checked for null reference.

Derived classes should return the current value to set if this method is called. The target is already checked for null reference.

Has to be called by derived classes when the value may have changed.

Should be called by a derived class if the value of the data provider changed.

Remove listener from target which was previously added in AddListener. The target is already checked for null reference.