/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2011 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.example.gwt.client.samples.controller;
import org.geomajas.example.gwt.client.samples.base.SamplePanel;
import org.geomajas.example.gwt.client.samples.base.SamplePanelFactory;
import org.geomajas.gwt.client.controller.AbstractRectangleController;
import org.geomajas.example.gwt.client.samples.i18n.I18nProvider;
import org.geomajas.gwt.client.spatial.Bbox;
import org.geomajas.gwt.client.widget.MapWidget;
import com.smartgwt.client.util.SC;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.events.DrawEvent;
import com.smartgwt.client.widgets.events.DrawHandler;
import com.smartgwt.client.widgets.layout.VLayout;
/**
* <p>
* Sample that shows how a RectangleController can be added to the map and acted upon.
* In this sample the RectangleController is used as a tool to measure an area.
* </p>
*
* @author Frank Wynants
*/
public class RectangleControllerSample extends SamplePanel {
private static final double KM_DEGREE = 112.12; // the number of km in 1 degree
public static final String TITLE = "RectangleController";
public static final SamplePanelFactory FACTORY = new SamplePanelFactory() {
public SamplePanel createPanel() {
return new RectangleControllerSample();
}
};
/**
* @return The viewPanel Canvas
*/
public Canvas getViewPanel() {
/**
* <p>
* A RectangleController that calculates the size of the selected area and outputs it.
* </p>
* @author Frank Wynants
*/
class AreaController extends AbstractRectangleController {
// A RectangleController that prints the size of the selected area
/**
* Constructor
*
* @param mapWidget
*/
public AreaController(MapWidget mapWidget) {
super(mapWidget);
}
/**
* When the user selects a rectangle the size of the rectangle in km is printed out and the total size of
* the area is computed and printed out
*
* @param worldBounds
*/
protected void selectRectangle(Bbox worldBounds) {
double cWidth = worldBounds.getWidth();
double cHeight = worldBounds.getHeight();
// transfer degrees to km
double kmWidth = cWidth * KM_DEGREE;
double kmHeight = cHeight * KM_DEGREE;
// compute total area
double area = kmWidth * kmHeight;
// round the numbers two 2 digits for easier human reading
double roundedKmWidth = Math.round(kmWidth * 100) / 100.0;
double roundedKmHeight = Math.round(kmHeight * 100) / 100.0;
double roundedArea = Math.round(area * 100) / 100.0;
SC.say(I18nProvider.getSampleMessages().rectangeControllerOutput(roundedKmWidth, roundedKmHeight,
roundedArea));
}
}
VLayout layout = new VLayout();
layout.setWidth100();
layout.setHeight100();
// Map with ID wmsMap is defined in the XML configuration. (mapWms.xml)
final MapWidget map = new MapWidget("mapWms", "gwt-samples");
map.addDrawHandler(new DrawHandler() {
public void onDraw(DrawEvent event) {
AreaController areaController = new AreaController(map);
map.setController(areaController);
}
});
layout.addMember(map);
return layout;
}
public String getDescription() {
return I18nProvider.getSampleMessages().rectangleControllerDescription();
}
public String getSourceFileName() {
return "classpath:org/geomajas/example/gwt/client/samples/controller/RectangleControllerSample.txt";
}
public String[] getConfigurationFiles() {
return new String[] { "WEB-INF/layerWmsBluemarble.xml", "WEB-INF/mapWms.xml" };
}
public String ensureUserLoggedIn() {
return "luc";
}
}