syntaxschemecelleditor.java

具有不同语法高亮的编辑器实例

/*
 * 07/30/2004
 *
 * SyntaxSchemeCellEditor.java - Editor for a JTable allowing you to select a
 *                               syntax scheme 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.ui.rsyntaxtextarea;

import java.awt.Color;
import java.awt.Component;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ResourceBundle;
import javax.swing.AbstractCellEditor;
import javax.swing.JButton;
import javax.swing.JTable;
import javax.swing.table.TableCellEditor;


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

	/**
	 * 
	 */
	private static final long serialVersionUID = 7174958280264656223L;

	/**
	 * The syntax scheme the user chooses.
	 */
	private SyntaxScheme scheme;

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

	/**
	 * The dialog we display.
	 */
	private SyntaxSchemeDialog dialog;


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


	/**
	 * Constructor.
	 *
	 * @param owner The frame that owns this cell editor.
	 * @param resources The resource bundle with which to label everything
	 *        (an instance of org.fife.ui.rsyntaxtextarea.ResourceBundle).
	 */
	public SyntaxSchemeCellEditor(Frame owner, ResourceBundle resources) {

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

		//Set up the dialog that the button brings up.
		dialog = new SyntaxSchemeDialog(owner, this, resources);

	}


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



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

		String actionCommand = e.getActionCommand();

		// If the user has clicked on a cell...
		if (actionCommand.equals("edit")) {
			button.setBackground(scheme.background==null ? Color.WHITE : scheme.background);
			button.setForeground(scheme.foreground==null ? Color.BLACK : scheme.foreground);
			dialog.setSyntaxScheme(scheme);
			dialog.setVisible(true);
			fireEditingStopped();
		}

		//User pressed the dialog's "OK" button.
		else if (actionCommand.equals(SyntaxSchemeDialog.OK_PRESSED)) {
			scheme = dialog.getSelectedScheme();
		}

		else if (actionCommand.equals(SyntaxSchemeDialog.CANCEL_PRESSED)) {
			scheme = null;
		}

	}


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


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


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


	/**
	 * 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) {
		scheme = (SyntaxScheme)value;
		return button;
	}


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

}