fixedzoomintool.java

esri的ArcGIS Server超级学习模板程序（for java）

package com.esri.solutions.jitk.tools;

import com.esri.adf.web.data.WebMap;
import com.esri.adf.web.data.geometry.WebExtent;
import com.esri.adf.web.data.geometry.WebPoint;
import com.esri.adf.web.faces.event.MapEvent;
import com.esri.adf.web.faces.event.MapToolAction;
import com.esri.solutions.jitk.commands.FixedZoomAction;

/**
 * The zoom in command.
 */
@SuppressWarnings("serial")
public class FixedZoomInTool extends FixedZoomAction implements MapToolAction {
	/**
	 * Zooms in at the passed center point
	 */
	public void zoomInAtPoint(MapEvent event) {
		WebMap webMap = event.getWebContext().getWebMap();

		WebPoint webExtentCenterPoint = (WebPoint) 
			event.getWebGeometry().toMapGeometry(webMap);
		
		WebExtent newExtent = getScaledExtent(webMap.getCurrentExtent(),
				getZoomFactor(), webExtentCenterPoint);
		webMap.setCurrentExtent(newExtent);
		getWebContext().refresh(webMap);
	}

	public void execute(MapEvent mapEvent) throws Exception {
		zoomInAtPoint(mapEvent);
	}

}