colorcelleditor.java

具有不同语法高亮的编辑器实例

/*
 * 02/24/2004
 *
 * ColorCellEditor.java - Editor for a JTable allowing you to select a color
 *                        for a cell.
 * Copyright (C) 2004 Robert Futrell
 * [e-mail]
 * www.website.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.fife;

import java.awt.Color;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractCellEditor;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JDialog;
import javax.swing.JTable;
import javax.swing.table.TableCellEditor;


/**
 * An editor for a <code>JTable</code> allowing you to select a color for a
 * cell.
 *
 * @author Robert Futrell
 * @version 1.0
 */
public class ColorCellEditor extends AbstractCellEditor
						implements TableCellEditor, ActionListener {

	/**
	 * 
	 */
	private static final long serialVersionUID = -544640097485485562L;

	/**
	 * The color the user chooses.
	 */
	private Color color;

	/**
	 * The component used to know when to edit.
	 */
	private JButton button;

	/**
	 * For the user to select a color.
	 */
	private JColorChooser chooser;

	/**
	 * Wraps the color chooser above so we can trap its "OK" button presses.
	 */
	private JDialog dialog;


/*****************************************************************************/


	/**
	 * Constructor.
	 */
	public ColorCellEditor() {

		button = new JButton();
		button.setActionCommand("edit");
		button.addActionListener(this);
		button.setBorderPainted(false);

		//Set up the dialog that the button brings up.
		chooser = new JColorChooser();
		dialog = JColorChooser.createDialog(button, "Pick a Color",
									true, chooser,
									this, null);

	}


/*****************************************************************************/



	/**
	 * Listens for actions in this class.
	 */
	public void actionPerformed(ActionEvent e) {

		// If the user has clicked on a cell...
		if (e.getActionCommand().equals("edit")) {
			button.setBackground(color);
			chooser.setColor(color);
			dialog.setVisible(true);
			fireEditingStopped();
		}

		//User pressed the dialog's "OK" button.
		else {
			color = chooser.getColor();
		}

	}


/*****************************************************************************/


	/**
	 * Returns the value contained in the editor.
	 *
	 * @return The value; in this case, the color.
	 */
	public Object getCellEditorValue() {
		return color;
	}


/*****************************************************************************/


	/**
	 * Sets the initial value for the editor.
	 *
	 * @return The component for editing.
	 */
	public Component getTableCellEditorComponent(JTable table, Object value,
										boolean isSelected,
										int row, int column) {
		color = (Color)value;
		return button;
	}


/*****************************************************************************/


}