| /******************************************************************************* |
| * Copyright (c) 2000, 2009 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * 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> |
| * <strong>Note:</strong> This listener will not be notified when the viewer is resized. |
| * </p> |
| * <p> |
| * Clients may implement this interface. |
| * </p> |
| * |
| * @see org.eclipse.jface.text.ITextViewer#addViewportListener(IViewportListener) |
| */ |
| public interface IViewportListener { |
| |
| /** |
| * Informs that the view port changed. The given vertical position is the new vertical scrolling |
| * offset measured in pixels. |
| * <p> |
| * <strong>Note:</strong> This event will not be sent when the viewer is resized. |
| * </p> |
| * |
| * @param verticalOffset the vertical offset measured in pixels |
| */ |
| void viewportChanged(int verticalOffset); |
| } |
