public void addListener ( SourcePictureListener listener ) {
		Tools.log("SourcePicture.addListener: listener added on SourcePicture " + Integer.toString(this.hashCode()) + " of class: " + listener.getClass().toString() );
		sourcePictureListeners.add( listener );
		//showListeners();
	}
public void addListener ( SourcePictureListener listener ) { Tools . log ( "SourcePicture.addListener: listener added on SourcePicture " + Integer . toString ( this . hashCode ( ) ) + " of class: " + listener . getClass ( ) . toString ( ) ) ; sourcePictureListeners . add ( listener ) ; }
method to register the listening object of the status events