com.mecatran.otp.gwt.client.view.OpenLayersWaypoint.java Source code

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Here is the source code for com.mecatran.otp.gwt.client.view.OpenLayersWaypoint.java

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/* -------------------------------------------------------------------------
OpenTripPlanner GWT Client
Copyright (C) 2015 Mecatran - info@mecatran.com
    
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 2 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   ------------------------------------------------------------------------- */
package com.mecatran.otp.gwt.client.view;

import org.gwtopenmaps.openlayers.client.LonLat;
import org.gwtopenmaps.openlayers.client.Pixel;
import org.gwtopenmaps.openlayers.client.Style;
import org.gwtopenmaps.openlayers.client.feature.VectorFeature;
import org.gwtopenmaps.openlayers.client.geometry.Point;
import org.gwtopenmaps.openlayers.client.layer.Vector;

import com.google.gwt.resources.client.ImageResource;

public class OpenLayersWaypoint {

    private VectorFeature vectorFeature;
    private LonLat position;
    private Vector layer;
    private String name;
    private boolean draggable;
    private ImageResource imageResource;
    private double opacity;

    public OpenLayersWaypoint(Vector layer, String name, boolean draggable, ImageResource imageResource,
            double opacity) {
        position = null;
        vectorFeature = null;
        this.layer = layer;
        this.name = name;
        this.draggable = draggable;
        this.imageResource = imageResource;
        this.opacity = opacity;
    }

    public void moveTo(LonLat newPosition) {
        hide();
        position = newPosition;
        show();
    }

    public void show() {
        if (position == null)
            return;
        Point point = new Point(position.lon(), position.lat());
        vectorFeature = createFeatureFromImageResource(imageResource, new Pixel(-10, -39), point, opacity);
        vectorFeature.getAttributes().setAttribute(OpenLayersPlannerMapWidget.WAYPOINT_TYPE_KEY, name);
        vectorFeature.getAttributes().setAttribute(OpenLayersPlannerMapWidget.WAYPOINT_DRAGGABLE_KEY, draggable);
        layer.addFeature(vectorFeature);
        layer.redraw();
    }

    public void hide() {
        if (vectorFeature != null)
            layer.removeFeature(vectorFeature);
        vectorFeature = null;
    }

    public boolean isSet() {
        return (position != null);
    }

    private VectorFeature createFeatureFromImageResource(ImageResource imageResource, Pixel anchor, Point position,
            double opacity) {
        Style pointStyle = new Style();
        pointStyle.setExternalGraphic(imageResource.getSafeUri().asString());
        pointStyle.setGraphicSize(imageResource.getWidth(), imageResource.getHeight());
        pointStyle.setGraphicOffset(anchor.x(), anchor.y());
        pointStyle.setFillOpacity(1.0 * opacity);
        pointStyle.setStrokeOpacity(1.0 * opacity);
        VectorFeature retval = new VectorFeature(position, pointStyle);
        return retval;
    }

    public LonLat getLonLat() {
        if (position == null)
            return null;
        return position;
    }

    public void setAttribute(String name, String value) {
        if (vectorFeature != null)
            vectorFeature.getAttributes().setAttribute(name, value);
    }

}