newaction.java

具有不同语法高亮的编辑器实例

/*
 * 11/14/2003
 *
 * NewAction.java - Action used to open a new document in RText.
 * Copyright (C) 2003 Robert Futrell
 * [e-mail]
 * www.website.com
 *
 * This file is a part of RText.
 *
 * RText 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.
 *
 * RText 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.rtext;

import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.ImageIcon;
import javax.swing.KeyStroke;


/**
 * Action used by an <code>AbstractMainView</code> to open a new document.
 *
 * @author Robert Futrell
 * @version 1.0
 */
public class NewAction extends AbstractAction {

	private RText owner;


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


	/**
	 * Creates a new <code>NewAction</code>.
	 *
	 * @param text The text associated with the action.
	 * @param icon The icon associated with the action.
	 * @param desc The description of the action (used in tooltips???).
	 * @param mnemonic The mnemonic for the action.
	 * @param accelerator The accelerator key for the action.
	 */
	 public NewAction(String text, ImageIcon icon, String desc, Integer mnemonic, KeyStroke accelerator,
					RText owner) {
		super(text, icon);
		putValue(SHORT_DESCRIPTION, desc);
		putValue(ACCELERATOR_KEY, accelerator);
		putValue(MNEMONIC_KEY, mnemonic);
		this.owner = owner;
	}


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


	// Callback routine called when user uses this component.
	public void actionPerformed(ActionEvent e) {

		AbstractMainView mainView = owner.getMainView();

		// First, remove old listeners.
		if (mainView.currentTextArea != null) {
			mainView.currentTextArea.getDocument().
								removeDocumentListener(owner);
			mainView.currentTextArea.removeCaretListener(owner);
			mainView.currentTextArea.removeKeyListener(owner);
		}

		// Create a new RTextDocument for an empty file with a default name.
		mainView.addNewEmptyUntitledTextFile();

		// Now, since the new tab is guaranteed to be a new number from the
		// old active tab, the stateChanged() callback below will take care
		// of updating all listeners.

	}


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


}