EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.vaadin.component.common;

import java.text.ParseException;

import org.vaadin.addon.leaflet.LMap;

import org.vaadin.addon.leaflet.LMarker;

import org.vaadin.addon.leaflet.LOpenStreetMapLayer;

import com.vaadin.data.fieldgroup.BeanFieldGroup;

import com.vaadin.data.fieldgroup.FieldGroup;

import com.vaadin.data.util.BeanItem;

import com.vaadin.server.UserError;

import com.vaadin.ui.Component;

import com.vaadin.ui.CssLayout;

import com.vaadin.ui.GridLayout;

import com.vaadin.ui.Label;

import com.vaadin.ui.TextField;

import eu.etaxonomy.cdm.model.location.Point;

import eu.etaxonomy.vaadin.component.CompositeCustomField;

/**

 * @author a.kohlbecker

 * @since Jun 22, 2017

 *

 */

public class GeoLocationField extends CompositeCustomField<Point> {

    private static final long serialVersionUID = 1122123034547920390L;

    private static final String PRIMARY_STYLE = "v-geolocation-field";

    private BeanFieldGroup<Point> fieldGroup = new BeanFieldGroup<>(Point.class);

    Point parsedPoint = Point.NewInstance();

    private TextField longitudeField = new TextField("Long.");

    TextField latitudeField = new TextField("Lat.");

    Label longLatParsed = new Label();

    TextField errorRadiusField = new TextField("Error radius (m)");

    TextField referenceSystemField = new TextField("ReferenceSystem");

    private LMap map = new LMap();

    private LMarker mapMarker = new LMarker();

    private CssLayout mapWrapper;

    /**

     *

     */

    public GeoLocationField() {

        super();

    }

    public GeoLocationField(String caption) {

        super();

        setCaption(caption);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected Component initContent() {

        super.setPrimaryStyleName(PRIMARY_STYLE);

        GridLayout root = new GridLayout();

        root.setRows(2);

        root.setColumns(3);

        root.setStyleName("wrapper");

        root.addComponent(longitudeField, 0, 0);

        root.addComponent(latitudeField, 1, 0);

        root.addComponent(errorRadiusField, 0, 1);

        root.addComponent(referenceSystemField, 1, 1);

        map = new LMap();

        map.addBaseLayer(new LOpenStreetMapLayer(), null);

        map.setDraggingEnabled(false);

        map.setScrollWheelZoomEnabled(false);

        map.removeControl(map.getLayersControl());

        root.setColumnExpandRatio(2, 1.0f);

        root.setRowExpandRatio(1, 1.0f);

        root.addComponent(map, 2, 1);

        mapWrapper = new CssLayout(longLatParsed, map);

        root.addComponent(mapWrapper, 2, 0, 2, 1);

        mapWrapper.setSizeFull();

        mapWrapper.setStyleName("map-wrapper");

        longLatParsed.setWidthUndefined();

        longitudeField.addTextChangeListener(e -> updateParsedValue(longitudeField, e.getText()));

        latitudeField.addTextChangeListener(e -> updateParsedValue(latitudeField, e.getText()));

        addStyledComponents(longitudeField, latitudeField, errorRadiusField, referenceSystemField, longLatParsed);

        addSizedComponent(root);

        fieldGroup.bind(longitudeField, "longitude");

        fieldGroup.bind(latitudeField, "latitude");

        fieldGroup.bind(errorRadiusField, "errorRadius");

        fieldGroup.bind(referenceSystemField, "referenceSystem");

        return root;

    }

    /**

     * @param longitudeField2

     * @param value

     * @return

     */

    private void updateParsedValue(TextField field, String value) {

        field.setComponentError(null);

        if(value != null){

            try {

            if(field == longitudeField){

                parsedPoint.setLongitudeByParsing(value);

            } else {

                parsedPoint.setLatitudeByParsing(value);

            }

            } catch (ParseException e) {

                field.setComponentError(new UserError(e.getMessage()));

            }

        }

        updateMap();

    }

    /**

     *

     */

    protected void updateMap() {

        longLatParsed.setValue(parsedPoint.getLongitudeSexagesimal() + "/" + parsedPoint.getLatitudeSexagesimal());

        map.removeComponent(mapMarker);

        if(parsedPoint.getLongitude() != null && parsedPoint.getLatitude() != null){

            map.setZoomLevel(10);

            mapMarker.setPoint(new org.vaadin.addon.leaflet.shared.Point(parsedPoint.getLatitude(), parsedPoint.getLongitude()));

            map.addComponents(mapMarker);

            map.setCenter(parsedPoint.getLatitude(), parsedPoint.getLongitude());

        } else {

            map.setZoomLevel(1);

            map.setCenter(40, 0);

        }

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Class<? extends Point> getType() {

        return Point.class;

    }

    @Override

    protected void setInternalValue(Point newValue) {

        if(newValue == null){

            newValue = Point.NewInstance();

        }

        super.setInternalValue(newValue);

        fieldGroup.setItemDataSource(new BeanItem<Point>(newValue));

        referenceSystemField.setEnabled(false); // disabled since not fully implemented

        parsedPoint = newValue;

        updateMap();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void addDefaultStyles() {

        // no default styles so far

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public FieldGroup getFieldGroup() {

        return fieldGroup;

    }

}