/*
* Open Source Physics software is free software as described near the bottom of this code file.
*
* For additional information and documentation on Open Source Physics please see:
* <http://www.opensourcephysics.org/>
*/
package org.opensourcephysics.tools;
import java.awt.Cursor;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import javax.swing.JCheckBox;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreePath;
/**
* A checkbox mouse and tree selection listener.
*
* @author Douglas Brown
*
* Based on code by Santhosh Kumar T - santhosh@in.fiorano.com
* See http://www.jroller.com/page/santhosh/20050610
*/
public class CheckTreeManager extends MouseAdapter implements TreeSelectionListener, MouseMotionListener {
private CheckTreeSelectionModel selectionModel;
private JTree tree = new JTree();
int hotspot = new JCheckBox().getPreferredSize().width;
boolean ignoreEvents = false;
/**
* Constructor.
*
* @param tree a JTree
*/
public CheckTreeManager(JTree tree) {
this.tree = tree;
selectionModel = new CheckTreeSelectionModel(tree.getModel());
tree.setCellRenderer(new CheckTreeCellRenderer(tree.getCellRenderer(), selectionModel));
tree.addMouseListener(this);
tree.addMouseMotionListener(this);
selectionModel.addTreeSelectionListener(this);
}
/**
* Handles mouse moved events.
*
* @param e the mouse event
*/
public void mouseMoved(MouseEvent e) {
TreePath path = tree.getPathForLocation(e.getX(), e.getY());
if(path==null) {
return;
}
if((e.getX()>tree.getPathBounds(path).x+hotspot-3)||(e.getX()<tree.getPathBounds(path).x+2)) {
tree.setCursor(Cursor.getDefaultCursor());
} else {
tree.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
}
}
/**
* Handles mouse click events.
*
* @param e the mouse event
*/
public void mouseClicked(MouseEvent e) {
TreePath path = tree.getPathForLocation(e.getX(), e.getY());
if(path==null) {
return;
}
if(e.getX()>tree.getPathBounds(path).x+hotspot) {
return;
}
boolean selected = selectionModel.isPathOrAncestorSelected(path);
try {
ignoreEvents = true;
if(selected) {
selectionModel.removeSelectionPath(path);
} else {
selectionModel.addSelectionPath(path);
}
} finally {
ignoreEvents = false;
tree.treeDidChange();
}
}
public CheckTreeSelectionModel getSelectionModel() {
return selectionModel;
}
public void valueChanged(TreeSelectionEvent e) {
if(!ignoreEvents) {
tree.treeDidChange();
}
}
public void mouseDragged(MouseEvent e) {
/** empty block */
}
}
/*
* Open Source Physics software is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License (GPL) as
* published by the Free Software Foundation; either version 2 of the License,
* or(at your option) any later version.
*
* Code that uses any portion of the code in the org.opensourcephysics package
* or any subpackage (subdirectory) of this package must must also be be
* released under the GNU GPL license.
*
* This software 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston MA 02111-1307 USA or view the license online at
* http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2007 The Open Source Physics project
* http://www.opensourcephysics.org
*/