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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.text;
/**
* Registered with a text viewer, view port listeners are informed about changes
* of a text viewer's view port. The view port is that portion of the viewer's
* document which is visible in the viewer.
* <p>
* Clients may implement this interface.
*
* @see org.eclipse.jface.text.ITextViewer
*/
public interface IViewportListener {
/**
* Informs about view port changes. The given vertical position is the new
* vertical scrolling offset measured in pixels.
*
* @param verticalOffset the vertical offset measured in pixels
*/
void viewportChanged(int verticalOffset);
}