org.geomajas.plugin.geocoder.client.AlternativesPanel.java Source code

Introduction

Here is the source code for org.geomajas.plugin.geocoder.client.AlternativesPanel.java

Source

/*
 * This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
 *
 * Copyright 2008-2013 Geosparc nv, http://www.geosparc.com/, Belgium.
 *
 * The program is available in open source according to the GNU Affero
 * General Public License. All contributions in this program are covered
 * by the Geomajas Contributors License Agreement. For full licensing
 * details, see LICENSE.txt in the project root.
 */

package org.geomajas.plugin.geocoder.client;

import org.geomajas.plugin.geocoder.client.event.SelectAlternativeEvent;
import org.geomajas.plugin.geocoder.client.event.SelectAlternativeHandler;
import org.geomajas.plugin.geocoder.command.dto.GetLocationForStringAlternative;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * A {@link PopupPanel} extension for the {@link GetLocationForStringAlternative}s 
 * given by a {@link SelectAlternativeEvent}.
 * 
 * @author Emiel Ackermann
 */
public class AlternativesPanel extends PopupPanel implements SelectAlternativeHandler {

    private final GeocoderTextBox box;
    private VerticalPanel verticalPanel;

    /**
     * Main constructor.
     * 
     * @param box
     *          the {@link GeocoderTextBox} that could give alternatives
     */
    public AlternativesPanel(final GeocoderTextBox box) {
        super(true);
        this.box = box;
        box.setSelectAlternativeHandler(this);
        setStyleName(GeocoderWidget.GM_GEOCODER_GADGET_ALT_PANEL);
        verticalPanel = new VerticalPanel();
        add(verticalPanel);
        addCloseHandler(new CloseHandler<PopupPanel>() {

            public void onClose(CloseEvent<PopupPanel> event) {
                box.removeStyleName(GeocoderWidget.GM_GEOCODER_GADGET_TEXT_BOX_WITH_ALTS);
            }
        });
    }

    /**
     * Always reset position in case the textbox has been moved (map resize, etc).
     * {@inheritDoc}
     */
    @Override
    protected void onLoad() {
        super.onLoad();
        int left = (int) box.getAbsoluteLeft();
        int top = (int) box.getAbsoluteTop() + box.getOffsetHeight();
        setWidth(String.valueOf(box.getOffsetWidth()));
        setPopupPosition(left, top);
    }

    @Override
    public void onSelectAlternative(SelectAlternativeEvent event) {
        verticalPanel.clear();
        for (GetLocationForStringAlternative alternative : event.getAlternatives()) {
            final String altText = alternative.getCanonicalLocation();
            Label altLabel = new Label(altText);
            altLabel.setStyleName(GeocoderWidget.GM_GEOCODER_GADGET_ALT_LABEL);
            altLabel.addClickHandler(new ClickHandler() {

                public void onClick(ClickEvent event) {
                    box.goToLocation(altText);
                    hide();
                }
            });
            verticalPanel.add(altLabel);
        }
        show();
        box.addStyleName(GeocoderWidget.GM_GEOCODER_GADGET_TEXT_BOX_WITH_ALTS);
    }

}