treemousehandler.java

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/**
 *   TreeMouseHandler.java
 *   Copyright 2005 Carlos Silva A.
 * 
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License. 
 *   You may obtain a copy of the License at  
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 * 
 */
package jgantt.view.tree;

import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Enumeration;

import javax.swing.JCheckBoxMenuItem;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;

/**
 * TreeMouseHandler
 * Detecta el evento de pressed para asignar el foco de la tabla
 * 
 * <p>$Date: 2004/04/23 00:04:31 $</p> 
 * @version $Revision: 1.1 $
 * @author Carlos Silva
 */
public class TreeMouseHandler implements MouseListener {
	TaskTree taskTree;
	/**
	 * 
	 */
	public TreeMouseHandler(TaskTree tree) {
		super();
		taskTree = tree;
	}

	/**
	 * @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
	 */
	public void mouseClicked(MouseEvent arg0) {

	}

	public void mousePressed(MouseEvent ev) {
		if ((ev.getModifiers() & MouseEvent.BUTTON1_MASK) > 0) {
			taskTree.setFocus(ev.getX(), ev.getY());
		}
		if ((ev.getModifiers() & MouseEvent.BUTTON3_MASK) > 0) {
			if (ev.getPoint().y < taskTree.treeOptions.headerHeight) {
				popupColumnMenu(ev.getPoint());
			}

		}
	}

	public void mouseReleased(MouseEvent arg0) {
	}

	public void mouseEntered(MouseEvent arg0) {
	}

	public void mouseExited(MouseEvent arg0) {
	}

	void popupColumnMenu(Point p) {
		JPopupMenu popup = null;
		popup = new JPopupMenu("Columns...");
		ActionListener al = new ColumnActionListener(p);
		// incluir nombres de columnas
		for (Enumeration e = taskTree.allColumns.elements(); e.hasMoreElements();) {
			Column c = (Column) e.nextElement();
			JCheckBoxMenuItem mi = new JCheckBoxMenuItem(c.getName());
			mi.setSelected(taskTree.columns.contains(c));
			mi.addActionListener(al);
			popup.add(mi);
		}
		taskTree.add(popup);
		popup.show(taskTree, p.x, p.y);
	}

	class ColumnActionListener implements ActionListener {
		int clickedColumnIndex = 0;

		public ColumnActionListener(Point p) {
			int xp = 0;
			clickedColumnIndex = taskTree.columns.size();
			for (int i = 0; i < taskTree.columns.size(); i++) {
				Column c = (Column) taskTree.columns.get(i);
				xp += c.getLength();
				if (p.x < xp) {
					clickedColumnIndex = i;
					break;
				}
			}
		}

		public void actionPerformed(ActionEvent ev) {
			String ac = ev.getActionCommand();
			JMenuItem mi = (JMenuItem) ev.getSource();
			if (mi.isSelected()) { // Agregar
				for (Enumeration e = taskTree.allColumns.elements();
					e.hasMoreElements();
					) {
					Column c = (Column) e.nextElement();
					if (c.getName().equals(ac)) {
						taskTree.columns.insertElementAt(c, clickedColumnIndex);
						taskTree.recalcWidths = true;
						break;
					}
				}
			} else { // Quitar
				for (int i = 0; i < taskTree.columns.size(); i++) {
					Column c = (Column) taskTree.columns.get(i);
					if (c.getName().equals(ac)) {
						taskTree.columns.remove(c);
						break;
					}
				}
			}
			taskTree.treeOptions.columns.clear();
			for (int i = 0; i < taskTree.columns.size(); i++) {
				Column c = (Column) taskTree.columns.get(i);
				taskTree.treeOptions.columns.add(c.getProperty());
			}

			taskTree.repaint();
		}
	}

}