/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* -------------------------
* SelectionChangeEvent.java
* -------------------------
* (C) Copyright 2013, 2014, by Michael Zinsmaier.
*
* Original Author: Michael Zinsmaier;
* Contributor(s): -;
*
* Changes
* -------
* 17-Sep-2013 : Version 1 (MZ);
*
*/
package org.jfree.data.general;
import java.util.EventObject;
import org.jfree.data.extension.DatasetCursor;
import org.jfree.data.extension.DatasetSelectionExtension;
/**
* A change event that notifies about a change to the selection state of data
* items.
*/
public class SelectionChangeEvent<CURSOR extends DatasetCursor>
extends EventObject {
/** a generated serial id*/
private static final long serialVersionUID = 5217307402196957331L;
/**
* Constructs a new event.
*
* @param selectionExtension the source of the event aka the selection
* extension that changed (the object has to be of type
* DatasetSelectionExtension and must not be null!)
*/
public SelectionChangeEvent(Object selectionExtension) {
super(selectionExtension);
}
/**
* @return the selection selection extension that triggered the event.
*/
public DatasetSelectionExtension<CURSOR> getSelectionExtension() {
if (this.getSource() instanceof DatasetSelectionExtension) {
return (DatasetSelectionExtension<CURSOR>)this.getSource();
}
//implementation error
return null;
}
}