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RText is a powerful, cross-platform programmer's text editor written in Java. It is designed to be easy to use, highly customizable and flexible. Part of RText's design is for the source code to be simple, easy to understand, and well documented, so that other programmers can look into its inner-workings and figure out how RText ticks with ease. A good place to start (besides the source code) is the Javadoc for all classes used in the project.

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/*
 * 11/14/2003
 *
 * NewAction.java - Action used to open a new document in RText.
 * Copyright (C) 2003 Robert Futrell
 * http://fifesoft.com/rtext
 * Licensed under a modified BSD license.
 * See the included license file for details.
 */
package org.fife.rtext.actions;

import java.awt.event.ActionEvent;
import java.util.ResourceBundle;
import javax.swing.Icon;

import org.fife.rtext.AbstractMainView;
import org.fife.rtext.RText;
import org.fife.ui.app.StandardAction;


/**
 * Action used by an AbstractMainView to open a new document.
 *
 * @author Robert Futrell
 * @version 1.0
 */
class NewAction extends StandardAction {


	/**
	 * Constructor.
	 *
	 * @param owner The parent RText instance.
	 * @param msg The resource bundle to use for localization.
	 * @param icon The icon associated with the action.
	 */
	public NewAction(RText owner, ResourceBundle msg, Icon icon) {
		super(owner, msg, "NewAction");
		setIcon(icon);
	}


	public void actionPerformed(ActionEvent e) {

		RText owner = (RText)getApplication();
		AbstractMainView mainView = owner.getMainView();

		// First, remove old listeners.
		if (mainView.getCurrentTextArea() != null) {
			mainView.getCurrentTextArea().removeCaretListener(owner);
		}

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

		// 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.

	}


}