package votorola.g.web.gwt.event; // Copyright 2010, 2012, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE.

import com.google.gwt.event.shared.GwtEvent;


/** An event that signals a change in the value of a "bound property".  Its semantics are
  * roughly equivalent to the namesake event in {@linkplain java.beans java.beans}.
  */
public final class PropertyChange extends GwtEvent<PropertyChangeHandler>
{


    /** Creates a PropertyChange.
      */
    public PropertyChange( String _propertyName ) { propertyName = _propertyName; }



   // ------------------------------------------------------------------------------------


    /** The name to which the property is bound.
      */
    public String propertyName() { return propertyName; }


        private final String propertyName;



    /** The common type key for all property change events.
      */
    public static final Type<PropertyChangeHandler> TYPE = new Type<PropertyChangeHandler>();
      // We might have defined a separate type for each property name in order to allow
      // handlers to register by property name, except that it might consume too much
      // memory.  The implementation of SimpleEventBus (GWT 2.1) creates a separate
      // handler list for every event type.



   // - G w t - E v e n t ----------------------------------------------------------------


    public @Override Type<PropertyChangeHandler> getAssociatedType() { return TYPE; }



    protected @Override void dispatch( final PropertyChangeHandler handler )
    {
        handler.onPropertyChange( PropertyChange.this );
    }


}