com.google.gwt.maps.sample.hellomaps.client.ControlsDemo.java Source code

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Here is the source code for com.google.gwt.maps.sample.hellomaps.client.ControlsDemo.java

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/*
 * Copyright 2008 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.gwt.maps.sample.hellomaps.client;

import com.google.gwt.core.client.GWT;
import com.google.gwt.maps.client.MapType;
import com.google.gwt.maps.client.MapWidget;
import com.google.gwt.maps.client.control.MapTypeControl;
import com.google.gwt.maps.client.control.SmallMapControl;
import com.google.gwt.maps.client.geom.LatLng;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.HTML;

/**
 * You can add controls to the map with the addControl method. In this case, we
 * add the built-in GSmallMapControl and GMapTypeControl controls, which let us
 * pan/zoom the map and switch between Map and Satellite modes, respectively.
 */
public class ControlsDemo extends MapsDemo {

    private static HTML descHTML = null;
    private static final String descString = "<p>Creates a 500 x 300 pixel map viewport centered on Palo Alto, CA USA. "
            + "You should be able to scroll the viewport by clicking and dragging " + "with the mouse.</p>\n"
            + "<p>The map window should be decorated with controls for zooming "
            + "in and out and for changing the map type.</p>" + "<p>Equivalent to the Maps JavaScript API Example: "
            + "<a href=\"http://code.google.com/apis/maps/documentation/examples/control-simple.html\">"
            + "http://code.google.com/apis/maps/documentation/examples/control-simple.html</a></p>\n";

    public static MapsDemoInfo init() {
        return new MapsDemoInfo() {
            @Override
            public MapsDemo createInstance() {
                return new ControlsDemo();
            }

            @Override
            public HTML getDescriptionHTML() {
                if (descHTML == null) {
                    descHTML = new HTML(descString);
                }
                return descHTML;
            }

            @Override
            public String getName() {
                return "Adding Controls to the Map";
            }
        };
    }

    private MapWidget map;

    public ControlsDemo() {
        map = new MapWidget(LatLng.newInstance(37.4419, -122.1419), 13);
        map.setSize("500px", "300px");
        initWidget(map);
        map.addControl(new SmallMapControl());
        map.addControl(new MapTypeControl());

        Timer timer = new Timer() {

            @Override
            public void run() {
                // Exercise the minimum & maximum resolution entry points.
                MapType types[] = map.getMapTypes();
                for (MapType t : types) {
                    int minResolution = t.getMinimumResolution();
                    int maxResolution = t.getMaximumResolution();
                    GWT.log("Map Type: " + t.getName(true) + " Min resolution: " + minResolution
                            + " Max Resolution: " + maxResolution, null);

                    minResolution = t.getMinimumResolution();
                    maxResolution = t.getMaximumResolution();
                    GWT.log("@ point: " + map.getCenter().toString() + " Map Type: " + t.getName(true)
                            + " Min resolution: " + minResolution + " Max Resolution: " + maxResolution, null);
                }
            }
        };
        timer.schedule(1000);
    }
}