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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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/*
 * 01/02/2010
 *
 * ToggleTextModeAction.java - Toggles the text mode (insert/overwrite) for
 * all open text editors.
 * Copyright (C) 2010 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 org.fife.rtext.AbstractMainView;
import org.fife.rtext.RText;
import org.fife.rtext.RTextEditorPane;
import org.fife.rtext.StatusBar;
import org.fife.ui.rtextarea.RTextArea;
import org.fife.ui.rtextarea.RTextAreaEditorKit;
import org.fife.ui.rtextarea.RecordableTextAction;


/**
 * Action that toggles the text mode (insert vs. overwrite) for all open text
 * editors.  This class extends RecordableTextAction so that it
 * it is recorded in macros.
 *
 * @author Robert Futrell
 * @version 1.0
 */
public class ToggleTextModeAction extends RecordableTextAction {

	private RText rtext;


	/**
	 * Constructor.
	 *
	 * @param rtext The parent application.
	 */
	public ToggleTextModeAction(RText rtext) {
		super(RTextAreaEditorKit.rtaToggleTextModeAction);
		this.rtext = rtext;
	}


	/**
	 * {@inheritDoc}
	 */
	public void actionPerformedImpl(ActionEvent e, RTextArea textArea) {
		StatusBar statusBar = (StatusBar)rtext.getStatusBar();
		AbstractMainView view = rtext.getMainView();
		boolean isInsertMode = view.getTextMode()==RTextEditorPane.INSERT_MODE;
		statusBar.setOverwriteModeIndicatorEnabled(isInsertMode);
		view.setTextMode(isInsertMode ? RTextEditorPane.OVERWRITE_MODE :
										RTextEditorPane.INSERT_MODE);
	}


	/**
	 * {@inheritDoc}
	 */
	public String getMacroID() {
		return getName();
	}


}