1 /******************************************************************************* 2 * Copyright (c) 2000, 2005 IBM Corporation and others. 3 * All rights reserved. This program and the accompanying materials 4 * are made available under the terms of the Eclipse Public License v1.0 5 * which accompanies this distribution, and is available at 6 * http://www.eclipse.org/legal/epl-v10.html 7 * 8 * Contributors: 9 * IBM Corporation - initial API and implementation 10 *******************************************************************************/ 11 package org.eclipse.jface.text; 12 13 14 15 /** 16 * Registered with a text viewer, view port listeners are informed about changes 17 * of a text viewer's view port. The view port is that portion of the viewer's 18 * document which is visible in the viewer. 19 * <p> 20 * Clients may implement this interface.</p> 21 * 22 * @see org.eclipse.jface.text.ITextViewer 23 */ 24 public interface IViewportListener { 25 26 /** 27 * Informs about view port changes. The given vertical position is the new 28 * vertical scrolling offset measured in pixels. 29 * 30 * @param verticalOffset the vertical offset measured in pixels 31 */ 32 void viewportChanged(int verticalOffset); 33 } 34