/* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2011, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.tutorials.toolview;
import java.awt.Color;
import java.awt.Shape;
import java.util.List;
import org.locationtech.udig.mapgraphic.MapGraphic;
import org.locationtech.udig.mapgraphic.MapGraphicContext;
import org.locationtech.udig.ui.graphics.ViewportGraphics;
import org.geotools.geometry.jts.ReferencedEnvelope;
/**
* Render all Referenced envelopes on the map as red semi-transparent rectangles. The SendAlertTool will place
* the alerts on the blackboard
*/
public class ShowAlertsMapGraphic implements MapGraphic {
public static final String ALERTS_KEY = "ALERTS";
public static final String EXTENSION_ID = "org.locationtech.udig.tutorials.tool-view.showalertmapgraphic";
@Override
public void draw(MapGraphicContext context) {
@SuppressWarnings("unchecked")
List<ReferencedEnvelope> alerts = (List<ReferencedEnvelope>) context.getLayer().getBlackboard().get(ALERTS_KEY);
if(alerts == null) return;
ViewportGraphics graphics = context.getGraphics();
for (ReferencedEnvelope referencedEnvelope : alerts) {
Shape shape = context.toShape(referencedEnvelope);
graphics.setColor(new Color(255,0,0,50));
graphics.fill(shape);
graphics.setColor(Color.RED);
graphics.draw(shape);
}
}
}