/*******************************************************************************
* Copyright 2005-2006, CHISEL Group, University of Victoria, Victoria, BC, Canada.
* 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:
* The Chisel Group, University of Victoria
*******************************************************************************/
package org.eclipse.zest.core.viewers;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.zest.core.viewers.internal.ZoomManager;
/**
* A simple interface that provides zooming capabilites. Not intended to be subclassed by clients.
* @author Del Myers
*
*/
//@tag bug.156286-Zooming.fix
public abstract class AbstractZoomableViewer extends StructuredViewer {
/**
* Returns a ZoomManager that zooming can be done on. May return null if none
* is available.
* @return a ZoomManager that zooming can be done on.
*/
protected abstract ZoomManager getZoomManager();
public void zoomTo(int x, int y, int width, int height) {
Rectangle r = new Rectangle(x,y,width,height);
if (r.isEmpty()) {
getZoomManager().setZoomAsText("100%");
} else {
getZoomManager().zoomTo(r);
}
}
}