vaadin-framework/src/com/itmill/toolkit/demo/reservation/gwt/client/ui/IGoogleMap.java

/* 
@ITMillApache2LicenseForJavaFiles@
 */

package com.itmill.toolkit.demo.reservation.gwt.client.ui;

import java.util.Iterator;

import com.itmill.toolkit.terminal.gwt.client.ApplicationConnection;
import com.itmill.toolkit.terminal.gwt.client.Paintable;
import com.itmill.toolkit.terminal.gwt.client.UIDL;
import com.mapitz.gwt.googleMaps.client.GControl;
import com.mapitz.gwt.googleMaps.client.GLatLng;
import com.mapitz.gwt.googleMaps.client.GMap2;
import com.mapitz.gwt.googleMaps.client.GMap2EventManager;
import com.mapitz.gwt.googleMaps.client.GMap2Widget;
import com.mapitz.gwt.googleMaps.client.GMarker;
import com.mapitz.gwt.googleMaps.client.GMarkerEventClickListener;
import com.mapitz.gwt.googleMaps.client.GMarkerEventManager;

public class IGoogleMap extends GMap2Widget implements Paintable {

    public static final String CLASSNAME = "i-googlemap";

    GMap2EventManager mapEventManager;
    GMarkerEventManager markerEventManager;
    GMap2 map;

    public IGoogleMap() {
        setStyleName(CLASSNAME);
        mapEventManager = GMap2EventManager.getInstance();
        map = getGmap();
        map.addControl(GControl.GSmallZoomControl());
    }

    public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
        map.clearOverlays();
        GLatLng pos = null;
        for (final Iterator it = uidl.getChildIterator(); it.hasNext();) {
            final UIDL u = (UIDL) it.next();
            if (u.getTag().equals("markers")) {

                for (final Iterator m = u.getChildIterator(); m.hasNext();) {
                    final UIDL umarker = (UIDL) m.next();
                    final String html = "<span>"
                            + umarker.getStringAttribute("html") + "</span>";
                    final double x = umarker.getDoubleAttribute("x");
                    final double y = umarker.getDoubleAttribute("y");
                    pos = new GLatLng(x, y);
                    final GMarker marker = new GMarker(pos);
                    map.addOverlay(marker);
                    if (html != null) {
                        addMarkerPopup(marker, html);
                    }
                }
            }
        }
        if (uidl.hasAttribute("width")) {
            setWidth("" + uidl.getIntAttribute("width"));
        }
        if (uidl.hasAttribute("height")) {
            setHeight("" + uidl.getIntAttribute("height"));
        }
        if (uidl.hasAttribute("zoom")) {
            map.setZoom(uidl.getIntAttribute("zoom"));
        }
        if (uidl.hasAttribute("centerX") && uidl.hasAttribute("centerY")) {
            final GLatLng center = new GLatLng(uidl
                    .getDoubleAttribute("centerX"), uidl
                    .getDoubleAttribute("centerY"));
            map.setCenter(center);
        } else if (pos != null) {
            // use last marker position
            map.setCenter(pos);
        }

    }

    private void addMarkerPopup(GMarker marker, String html) {
        if (markerEventManager == null) {
            markerEventManager = GMarkerEventManager.getInstance();
        }

        markerEventManager.addOnClickListener(marker, new MarkerEventListener(
                html));

    }

    private class MarkerEventListener implements GMarkerEventClickListener {
        String html;

        public MarkerEventListener(String html) {
            this.html = html;
        }

        public void onClick(GMarker marker) {
            marker.openInfoWindowHtml(html);
        }

        public void onDblClick(GMarker marker) {
        }
    }
}