presentationaction.java

来自「一个简单的UNCODE 码生成程序」· Java 代码 · 共 53 行

/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.examples.javaeditor;


import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.texteditor.TextEditorAction;

/**
 * A toolbar action which toggles the presentation model of the
 * connected text editor. The editor shows either the highlight range
 * only or always the whole document.
 */
public class PresentationAction extends TextEditorAction {

	/**
	 * Constructs and updates the action.
	 */
	public PresentationAction() {
		super(JavaEditorMessages.getResourceBundle(), "TogglePresentation.", null); //$NON-NLS-1$
		update();
	}
	
	/* (non-Javadoc)
	 * Method declared on IAction
	 */
	public void run() {

		ITextEditor editor= getTextEditor();

		editor.resetHighlightRange();
		boolean show= editor.showsHighlightRangeOnly();
		setChecked(!show);
		editor.showHighlightRangeOnly(!show);
	}
	
	/* (non-Javadoc)
	 * Method declared on TextEditorAction
	 */
	public void update() {
		setChecked(getTextEditor() != null && getTextEditor().showsHighlightRangeOnly());
		setEnabled(true);
	}
}