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515 lines
12 KiB
Java
515 lines
12 KiB
Java
package org.gcube.portlets.user.geoportaldataviewer.client.gis;
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import org.gcube.portlets.user.geoportaldataviewer.client.GeoportalDataViewerConstants;
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import org.gcube.portlets.user.geoportaldataviewer.client.events.AddedLayerToMapEvent;
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import org.gcube.portlets.user.geoportaldataviewer.shared.gis.LayerItem;
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import com.google.gwt.core.client.GWT;
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import com.google.gwt.dom.client.Style.Visibility;
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import com.google.gwt.event.shared.HandlerManager;
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import com.google.gwt.user.client.DOM;
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import com.google.gwt.user.client.Element;
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import com.google.gwt.user.client.Event;
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import ol.Collection;
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import ol.Coordinate;
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import ol.Map;
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import ol.MapBrowserEvent;
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import ol.MapEvent;
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import ol.MapOptions;
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import ol.OLFactory;
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import ol.Overlay;
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import ol.OverlayOptions;
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import ol.Size;
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import ol.View;
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import ol.ViewOptions;
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import ol.control.Attribution;
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import ol.event.EventListener;
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import ol.interaction.Draw;
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import ol.interaction.DrawOptions;
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import ol.interaction.Extent;
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import ol.interaction.ExtentOptions;
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import ol.interaction.Interaction;
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import ol.interaction.KeyboardPan;
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import ol.interaction.KeyboardZoom;
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import ol.layer.Base;
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import ol.layer.Image;
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import ol.layer.LayerOptions;
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import ol.layer.Tile;
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import ol.proj.Projection;
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import ol.proj.ProjectionOptions;
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import ol.source.ImageWms;
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import ol.source.ImageWmsOptions;
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import ol.source.ImageWmsParams;
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import ol.source.Osm;
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import ol.source.Vector;
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import ol.source.XyzOptions;
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// TODO: Auto-generated Javadoc
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/**
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* The Class OpenLayerOSM.
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*
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* @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
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*
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* Oct 27, 2020
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*/
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public abstract class OpenLayerOSM {
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public abstract void clickListener(MapBrowserEvent event);
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public abstract void moveEndListener(MapEvent event);
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public abstract void moveStartListener(MapEvent event);
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public abstract void mapZoomListener(MapEvent event);
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public abstract void mapZoomEndListener(MapEvent event);
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/** The map. */
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private Map map;
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/** The view. */
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private View view;
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/** The view options. */
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private ViewOptions viewOptions = OLFactory.createOptions();
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/** The projection options. */
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private ProjectionOptions projectionOptions = OLFactory.createOptions();
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/** The point draw. */
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private Draw queryPoint;
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private Extent queryBox;
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/** The popup overlay. */
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private Overlay popupOverlay;
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private HandlerManager eventBus;
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private boolean isQueryBoxActive;
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private boolean isQueryPointActive;
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/**
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* Instantiates a new open layer OSM.
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*
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* @param divTargetId the div target id
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* @param eventBus the event bus
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*/
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/* (non-Javadoc)
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* @see de.desjardins.ol3.demo.client.example.Example#show()
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*/
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public OpenLayerOSM(String divTargetId, HandlerManager eventBus) {
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this.eventBus = eventBus;
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// create a OSM-layer
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XyzOptions osmSourceOptions = OLFactory.createOptions();
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Osm osmSource = new Osm(osmSourceOptions);
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LayerOptions osmLayerOptions = OLFactory.createOptions();
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osmLayerOptions.setSource(osmSource);
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Tile osmLayer = new Tile(osmLayerOptions);
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// create a projection
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projectionOptions.setCode(GeoportalDataViewerConstants.EPSG_3857);
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projectionOptions.setUnits("m");
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Projection projection = new Projection(projectionOptions);
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viewOptions.setProjection(projection);
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viewOptions.setMaxZoom(19);
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//viewOptions.setExtent(new Extent(-180, -90, 180, 90));
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// create a view
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view = new View(viewOptions);
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// create the map
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MapOptions mapOptions = OLFactory.createOptions();
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mapOptions.setTarget(divTargetId);
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mapOptions.setView(view);
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map = new Map(mapOptions);
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map.addLayer(osmLayer);
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//map.addLayer(tileDebugLayer);
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// add some controls
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map.addControl(OLFactory.createScaleLine());
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MapUtils.addDefaultControls(map.getControls());
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Attribution attribution = new Attribution();
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attribution.setCollapsed(true);
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map.addControl(attribution);
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// add some interactions
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map.addInteraction(new KeyboardPan());
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map.addInteraction(new KeyboardZoom());
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bindEvents();
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}
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private void bindEvents() {
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map.addClickListener(new EventListener<MapBrowserEvent>() {
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@Override
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public void onEvent(MapBrowserEvent event) {
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clickListener(event);
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}
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});
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map.addMoveEndListener(new EventListener<MapEvent>() {
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@Override
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public void onEvent(MapEvent event) {
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moveEndListener(event);
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}
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});
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map.addMoveStartListener(new EventListener<MapEvent>() {
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@Override
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public void onEvent(MapEvent event) {
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moveStartListener(event);
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}
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});
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map.addMapZoomListener(new EventListener<MapEvent>() {
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@Override
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public void onEvent(MapEvent event) {
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mapZoomListener(event);
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}
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});
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map.addMapZoomEndListener(new EventListener<MapEvent>() {
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@Override
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public void onEvent(MapEvent event) {
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mapZoomEndListener(event);
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}
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});
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}
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/**
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* Sets the center.
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*
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* @param centerCoordinate the new center
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*/
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public void setCenter(Coordinate centerCoordinate) {
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view.setCenter(centerCoordinate);
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}
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/**
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* Sets the center.
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*
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* @param centerCoordinate the new center
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*/
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public void setZoom(int zoom) {
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view.setZoom(zoom);
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}
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public void showPopup(String html, Coordinate coordinate) {
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GWT.log("Showing popup on: "+coordinate);
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Element elPopup = DOM.getElementById("popup");
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elPopup.getStyle().setVisibility(Visibility.VISIBLE);
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if(popupOverlay==null) {
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popupOverlay = addOverlay(elPopup);
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addPopupCloserHandelr(popupOverlay);
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}
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Element popContent = DOM.getElementById("popup-content");
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popContent.setInnerHTML(html);
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popupOverlay.setPosition(coordinate);
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}
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public void hidePopup() {
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if(popupOverlay!=null) {
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Element elPopup = DOM.getElementById("popup");
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elPopup.getStyle().setVisibility(Visibility.HIDDEN);
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}
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}
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/**
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* Adds the popup closer handelr.
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*
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* @param popupOverlay the popup overlay
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*/
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private void addPopupCloserHandelr(Overlay popupOverlay) {
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Element elPopupCloser = DOM.getElementById("popup-closer");
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Event.sinkEvents(elPopupCloser, Event.ONCLICK);
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Event.setEventListener(elPopupCloser, new com.google.gwt.user.client.EventListener() {
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@Override
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public void onBrowserEvent(Event event) {
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if (Event.ONCLICK == event.getTypeInt()) {
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popupOverlay.setPosition(null);
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}
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}
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});
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}
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/**
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* Handler popu closer.
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*
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* @param divId the div id
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* @param overlayId the overlay id
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*/
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public static native void handlerPopuCloser(String divId, String overlayId) /*-{
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var closer = $doc.getElementById(divId);
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var overlay = $doc.getElementById(overlayId);
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closer.onclick = function() {
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overlay.setPosition(undefined);
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closer.blur();
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return false;
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};
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}-*/;
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/**
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* Adds the WMS layer.
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*
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* @param layerItem the layer item
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*/
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public void addWMSLayer(LayerItem layerItem) {
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ImageWmsParams imageWMSParams = OLFactory.createOptions();
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imageWMSParams.setLayers(layerItem.getName());
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ImageWmsOptions imageWMSOptions = OLFactory.createOptions();
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imageWMSOptions.setUrl(layerItem.getMapServerHost());
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imageWMSOptions.setParams(imageWMSParams);
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//imageWMSOptions.setRatio(1.5f);
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ImageWms imageWMSSource = new ImageWms(imageWMSOptions);
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LayerOptions layerOptions = OLFactory.createOptions();
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layerOptions.setSource(imageWMSSource);
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Image wmsLayer = new Image(layerOptions);
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//visibleLayerItems
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map.addLayer(wmsLayer);
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GWT.log("Fired the event Added Layer");
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eventBus.fireEvent(new AddedLayerToMapEvent(layerItem));
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}
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// /**
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// * Adds the WMS layer.
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// *
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// * @param mapServerHost the map server host
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// * @param layerName the layer name
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// */
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// public void addWMSLayer(String mapServerHost, String layerName) {
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//
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// ImageWmsParams imageWMSParams = OLFactory.createOptions();
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// imageWMSParams.setLayers(layerName);
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//
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// ImageWmsOptions imageWMSOptions = OLFactory.createOptions();
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// imageWMSOptions.setUrl(mapServerHost);
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// imageWMSOptions.setParams(imageWMSParams);
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// //imageWMSOptions.setRatio(1.5f);
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//
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// ImageWms imageWMSSource = new ImageWms(imageWMSOptions);
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//
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// LayerOptions layerOptions = OLFactory.createOptions();
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// layerOptions.setSource(imageWMSSource);
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//
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// Image wmsLayer = new Image(layerOptions);
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//
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// //visibleLayerItems
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//
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// map.addLayer(wmsLayer);
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// }
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/**
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* Adds the point vector source.
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*
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* @return the draw
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*/
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public Draw addPointVectorSource() {
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if(queryPoint==null)
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initPointInteraction();
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map.addInteraction(queryPoint);
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isQueryPointActive = true;
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return queryPoint;
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}
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/**
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* Inits the point interaction.
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*/
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private void initPointInteraction() {
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Vector vectorSource = new Vector();
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DrawOptions drawOptions = new DrawOptions();
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drawOptions.setSource(vectorSource);
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drawOptions.setType("Point");
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drawOptions.setMaxPoints(1);
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drawOptions.setMinPoints(1);
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drawOptions.setWrapX(false);
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queryPoint = new Draw(drawOptions);
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queryPoint.addChangeListener(new EventListener<ol.events.Event>() {
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@Override
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public void onEvent(ol.events.Event event) {
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GWT.log(event.getType());
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}
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});
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}
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/**
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* Removes the interaction.
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*
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* @param interaction the interaction
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*/
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public void removeInteraction(Interaction interaction) {
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map.removeInteraction(interaction);
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}
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/**
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* Removes the interactions.
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*/
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public void removeQueryInteractions() {
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Collection<Interaction> interactions = map.getInteractions();
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if(interactions!=null) {
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map.removeInteraction(queryBox);
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map.removeInteraction(queryPoint);
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isQueryBoxActive = false;
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isQueryPointActive = false;
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}
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}
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/**
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* Adds the extent interaction.
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*
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* @return the extent
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*/
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public Extent addExtentInteraction() {
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ExtentOptions extentOptions = new ExtentOptions();
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extentOptions.setWrapX(false);
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//StyleOptions styleOptions = new StyleOptions();
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//styleOptions.setStroke(stroke);
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//styleOptions.set
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//extentOptions.setBoxStyle(new ol.style.Style(styleOptions));
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queryBox = new Extent(extentOptions);
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map.addInteraction(queryBox);
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isQueryBoxActive = true;
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return queryBox;
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}
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/**
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* Adds the overlay.
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*
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* @param element the element
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* @return the overlay
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*/
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private Overlay addOverlay(Element element) {
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/**
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* Create an overlay to anchor the popup to the map.
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*/
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OverlayOptions overlayOptions = new OverlayOptions();
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overlayOptions.setAutoPan(true);
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Overlay overlay = new Overlay(overlayOptions);
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overlay.setElement(element);
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map.addOverlay(overlay);
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return overlay;
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}
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/**
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* Checks if is layer visible.
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*
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* @param layerName the layer name
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* @return true, if is layer visible
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*/
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public boolean isLayerVisible(String layerName) {
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Collection<Base> layers = map.getLayers();
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if(layers!=null) {
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Base[] layersArr = layers.getArray();
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for (int i = 0; i < layersArr.length; i++) {
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Base layer = layersArr[i];
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String theLayerName = (String) layer.get("name");
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GWT.log("The Layer name is: "+layerName);
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if(theLayerName!=null && theLayerName.equals(layerName))
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return true;
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}
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}
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return false;
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}
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/**
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* Gets the projection code.
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*
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* @return the projection code
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*/
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public String getProjectionCode() {
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return map.getView().getProjection().getCode();
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}
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/**
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* Gets the current zoom level.
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*
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* @return the current zoom level
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*/
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public double getCurrentZoomLevel() {
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return map.getView().getZoom();
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}
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/**
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* Gets the bbox.
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*
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* @return the bbox
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*/
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public ol.Extent getBBOX() {
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return getExtent();
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}
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/**
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* Gets the extent.
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*
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* @return the extent
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*/
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public ol.Extent getExtent() {
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return this.map.getView().calculateExtent(map.getSize());
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}
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public Coordinate transform (Coordinate centerCoordinate, String source, String target){
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return Projection.transform(centerCoordinate, source, target);
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}
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public boolean isQueryBoxActive() {
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return isQueryBoxActive;
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}
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public boolean isQueryPointActive() {
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return isQueryPointActive;
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}
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public Size getSize() {
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return map.getSize();
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}
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public boolean mapInstancied() {
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return this.map!=null;
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}
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}
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