NavigationHistoryControl.java

/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   This program is free software: you can redistribute it and/or modify it
 *   under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version. This program is distributed in the
 *   hope that it will be useful, but WITHOUT ANY WARRANTY; without
 *   even the implied warranty of MERCHANTABILITY or FITNESS FOR
 *   A PARTICULAR PURPOSE. See the GNU General Public License
 *   for more details. You should have received a copy of the GNU General
 *   Public License along with this program. If not, see http://www.gnu.org/licenses/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.gui.client.widget.map.control.history;

import org.geosdi.geoplatform.gui.client.event.ZoomNextEvent;
import org.geosdi.geoplatform.gui.client.event.ZoomPreviousEvent;
import org.geosdi.geoplatform.gui.configuration.map.control.GeoPlatformMapControl;
import org.geosdi.geoplatform.gui.puregwt.GPHandlerManager;
import org.gwtopenmaps.openlayers.client.control.NavigationHistory;
import org.gwtopenmaps.openlayers.client.control.NavigationHistoryOptions;
import org.gwtopenmaps.openlayers.client.event.ControlActivateListener;
import org.gwtopenmaps.openlayers.client.event.ControlDeactivateListener;

/**
 * @author giuseppe
 *
 */
public class NavigationHistoryControl implements GeoPlatformMapControl {

    private NavigationHistory control;

    public NavigationHistoryControl() {
        this.createControl();
    }

    /**
     * (non-Javadoc)
     *
     * @see
     * org.geosdi.geoplatform.gui.configuration.map.control.GeoPlatformMapControl#createControl()
     */
    @Override
    public void createControl() {
        NavigationHistoryOptions options = new NavigationHistoryOptions();
        options.setClearOnDeactivate(true);
        options.setAutoActivate(false);

        this.control = new NavigationHistory(options);

        this.control.getPrevious().addControlActivateListener(
                new ControlActivateListener() {
            @Override
            public void onActivate(ControlActivateEvent eventObject) {
                GPHandlerManager.fireEvent(new ZoomPreviousEvent(true));
            }
        });

        this.control.getPrevious().addControlDeactivateListener(
                new ControlDeactivateListener() {
            @Override
            public void onDeactivate(ControlDeactivateEvent eventObject) {
                GPHandlerManager
                        .fireEvent(new ZoomPreviousEvent(false));
            }
        });

        this.control.getNext().addControlActivateListener(
                new ControlActivateListener() {
            @Override
            public void onActivate(ControlActivateEvent eventObject) {
                GPHandlerManager.fireEvent(new ZoomNextEvent(true));
            }
        });

        this.control.getNext().addControlDeactivateListener(
                new ControlDeactivateListener() {
            @Override
            public void onDeactivate(ControlDeactivateEvent eventObject) {
                GPHandlerManager.fireEvent(new ZoomNextEvent(false));
            }
        });
    }

    @Override
    public void activateControl() {
        this.control.activate();
    }

    @Override
    public void deactivateControl() {
        this.control.deactivate();
    }

    public void clearHistory() {
        activateControl();
        this.control.clear();
    }

    /**
     * @return the control
     */
    public NavigationHistory getControl() {
        return control;
    }

    /**
     * Restore the next state on the Map
     */
    public void nextTrigger() {
        this.control.nextTrigger();
    }

    /**
     * Restore the previous state on the Map
     */
    public void previousTrigger() {
        this.control.previousTrigger();
    }

    @Override
    public boolean isEnabled() {
        return this.control.isActive();
    }

    @Override
    public void resetControl() {
    }
}