org.wannatrak.client.MapController.java Source code

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Here is the source code for org.wannatrak.client.MapController.java

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/*
 * Copyright 2009 Andrey Khalzov, and individual contributors as indicated by the @author tag.
 *
 * 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.
 */

/**
 * Created by Andrey Khalzov
 * 11.01.2009 1:07:22
 */
package org.wannatrak.client;

import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.maps.client.MapWidget;
import com.google.gwt.maps.client.base.LatLng;
import com.google.gwt.maps.client.layers.KmlLayer;
import com.google.gwt.maps.client.layers.KmlLayerOptions;
import com.google.gwt.user.client.Cookies;
import com.google.gwt.user.client.Random;
import com.google.gwt.user.client.Window;

import java.util.*;

public class MapController {
    private final Mediator mediator;
    private final MapWidget mapWidget;
    private final Map<Long, KmlLayer> layers;
    private final KmlLayerOptions options;

    public MapController(Mediator mediator, MapWidget mapWidget) {
        this.mediator = mediator;
        this.mapWidget = mapWidget;

        options = KmlLayerOptions.newInstance();
        options.setPreserveViewport(true);

        layers = new HashMap<Long, KmlLayer>();
    }

    public void setMapCenter(double latitude, double longitude) {
        final LatLng newCenter = LatLng.newInstance(latitude, longitude);
        mapWidget.setCenter(newCenter);
    }

    public void showSubjects(Set<Long> subjects, String fromDaysAgo, String fromHour, String fromMinute,
            String toDaysAgo, String toHour, String toMinute, boolean showErrors, boolean updateOnlyNew) {
        final Set<Long> subjectsToShow;

        if (updateOnlyNew) {
            subjectsToShow = new HashSet<Long>(subjects);

            for (Iterator<Long> it = layers.keySet().iterator(); it.hasNext();) {
                Long subjectId = it.next();
                if (!subjects.contains(subjectId)) {
                    layers.get(subjectId).setMap(null);
                    it.remove();
                }
            }
        } else {
            subjectsToShow = subjects;
        }

        for (final Long subjectId : subjectsToShow) {
            mediator.showSublectLoading(subjectId);

            String url = "http://" + Window.Location.getHost() + "/show?subjectId=" + subjectId + "&sessionId="
                    + Cookies.getCookie("JSESSIONID") + "&hfrom=" + fromHour + "&mfrom=" + fromMinute + "&dfrom="
                    + fromDaysAgo + "&hto=" + toHour + "&mto=" + toMinute + "&dto=" + toDaysAgo + "&valid="
                    + !showErrors + "&format="
                    + DateTimeFormat.getMediumDateTimeFormat().getPattern().replaceAll(" ", "_SPACE_")
                    + "&tzoffset=" + new Date().getTimezoneOffset() + "&nocache=" + Random.nextInt();
            options.setPreserveViewport(!updateOnlyNew);
            KmlLayer route = KmlLayer.newInstance(url, options);
            route.setMap(mapWidget);

            layers.put(subjectId, route);
            mediator.hideSubjectLoading(subjectId);
        }
    }
}