/*
* Copyright 2014 Lynden, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.lynden.gmapsfx;
import com.lynden.gmapsfx.javascript.JavaFxWebEngine;
import com.lynden.gmapsfx.javascript.JavascriptRuntime;
import com.lynden.gmapsfx.javascript.event.MapStateEventType;
import com.lynden.gmapsfx.javascript.object.DirectionsPane;
import com.lynden.gmapsfx.javascript.object.GoogleMap;
import com.lynden.gmapsfx.javascript.object.LatLong;
import com.lynden.gmapsfx.javascript.object.MapOptions;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.CyclicBarrier;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Worker;
import javafx.event.Event;
import javafx.event.EventDispatchChain;
import javafx.event.EventDispatcher;
import javafx.geometry.Point2D;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.AnchorPane;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import netscape.javascript.JSObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
/**
*
* @author Rob Terpilowski
*/
public class GoogleMapView extends AnchorPane {
private static final Logger LOG = LoggerFactory.getLogger(GoogleMapView.class);
protected static final String GOOGLE_MAPS_API_LINK = "https://maps.googleapis.com/maps/api/js?v=3.exp";
protected static final String GOOGLE_MAPS_API_VERSION = "3.exp";
private boolean usingCustomHtml;
protected final String language;
protected final String region;
protected String key;
protected WebView webview;
protected JavaFxWebEngine webengine;
protected boolean initialized = false;
protected final CyclicBarrier barrier = new CyclicBarrier(2);
protected final List<MapComponentInitializedListener> mapInitializedListeners = new ArrayList<>();
protected final List<MapReadyListener> mapReadyListeners = new ArrayList<>();
protected GoogleMap map;
protected DirectionsPane direc;
protected boolean disableDoubleClick = false;
public GoogleMapView() {
this(false);
}
public GoogleMapView(boolean debug) {
this(null, debug);
}
/**
* Allows for the creation of the map using external resources from another
* jar for the html page and markers. The map html page must be sourced from
* the jar containing any marker images for those to function.
* <p>
* The html page is, at it's simplest: null {@code
* <!DOCTYPE html>
* <html>
* <head>
* <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
* <meta charset="utf-8">
* <title>My Map</title>
* <style>
* html, body, #map-canvas {
* height: 100%;
* margin: 0px;
* padding: 0px
* }
* </style>
* <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
* </head>
* <body>
* <div id="map-canvas"></div>
* </body>
* </html> }
* <p>
* If you store this file in your project jar, under
* my.gmapsfx.project.resources as mymap.html then you should call using
* "/my/gmapsfx/project/resources/mymap.html" for the mapResourcePath.
* <p>
* Your marker images should be stored in the same folder as, or below the
* map file. You then reference them using relative notation. If you put
* them in a subpackage "markers" you would create your MarkerOptions object
* as follows: null {@code
* myMarkerOptions.position(myLatLong)
* .title("My Marker")
* .icon("markers/mymarker.png")
* .visible(true);
* }
*
* @param mapResourcePath
*/
public GoogleMapView(String mapResourcePath) {
this(mapResourcePath, false);
}
/**
* Creates a new map view and specifies if the FireBug pane should be
* displayed in the WebView
*
* @param mapResourcePath
* @param debug true if the FireBug pane should be displayed in the WebView.
*/
public GoogleMapView(String mapResourcePath, boolean debug) {
this(mapResourcePath, null, null, debug);
}
/**
* Creates a new map view and specifies the display language and API key.
*
* @param language map display language, null for default
* @param key Google Maps API key or null
*/
public GoogleMapView(String language, String key) {
this(null, language, key, false);
}
/**
* Creates a new map view and specifies the display language and API key.
*
* @param mapResourcePath
* @param language map display language, null for default
* @param key Google Maps API key or null
* @param debug true if the FireBug pane should be displayed in the WebView.
*/
public GoogleMapView(String mapResourcePath, String language, String key, boolean debug) {
this(mapResourcePath, language, null, key, debug);
}
/**
* Creates a new map view and specifies the display language and API key.
* <p>
* If you are specifying your own HTML page for mapResourcePath in a jar of
* your own then you should include a script element to pull in the Google
* Maps API with any API keys, language and region parameters.
*
* @param mapResourcePath
* @param language map display language, null for default
* @param region
* @param key Google Maps API key or null
* @param debug true if the FireBug pane should be displayed in the WebView.
*/
public GoogleMapView(String mapResourcePath, String language, String region, String key, boolean debug) {
this.language = "en";
this.region = "US";
this.key = key;
String htmlFile;
if (mapResourcePath == null) {
htmlFile = getHtmlFile(debug);
} else {
htmlFile = mapResourcePath;
usingCustomHtml = true;
}
CountDownLatch latch = new CountDownLatch(1);
Runnable initWebView = () -> {
try {
webview = new WebView();
EventDispatcher originalDispatcher = webview.getEventDispatcher();
webview.setEventDispatcher(new MyEventDispatcher(originalDispatcher));
webengine = new JavaFxWebEngine(webview.getEngine());
JavascriptRuntime.setDefaultWebEngine(webengine);
setFont(webview.getEngine());
setTopAnchor(webview, 0.0);
setLeftAnchor(webview, 0.0);
setBottomAnchor(webview, 0.0);
setRightAnchor(webview, 0.0);
getChildren().add(webview);
webview.widthProperty().addListener(e -> mapResized());
webview.heightProperty().addListener(e -> mapResized());
webengine.setOnAlert(e -> LOG.info("Alert: " + e.getData()));
webengine.setOnError(e -> LOG.error("Error: " + e.getMessage()));
webengine.getLoadWorker().stateProperty().addListener(
new ChangeListener<Worker.State>() {
public void changed(ObservableValue ov, Worker.State oldState, Worker.State newState) {
if (newState == Worker.State.SUCCEEDED) {
initialiseScript();
//setInitialized(true);
//fireMapInitializedListeners();
}
}
});
webengine.load(getClass().getResource(htmlFile).toExternalForm());
} finally {
latch.countDown();
}
};
if (Platform.isFxApplicationThread()) {
initWebView.run();
} else {
Platform.runLater(initWebView);
}
try {
latch.await();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
protected String getHtmlFile(boolean debug) {
if (debug) {
return "html/maps-debug.html";
} else {
return "html/maps.html";
}
}
private void initialiseScript() {
if (!usingCustomHtml) {
JSObject window = (JSObject) webengine.executeScript("window");
window.setMember("libLoadBridge", new MapLibraryLoadBridge());
String script = "loadMapLibrary('" + GOOGLE_MAPS_API_VERSION + "','" + key + "','" + language + "','" + region + "');";
webengine.executeScript(script);
} else {
setInitialized(true);
fireMapInitializedListeners();
}
}
private void setFont(WebEngine webEngine) {
webEngine.getLoadWorker().stateProperty().addListener((ObservableValue<? extends Worker.State> observable, Worker.State oldValue, Worker.State newValue) -> {
if (newValue == Worker.State.SUCCEEDED) {
Document document = (Document) webEngine.executeScript("document");
Element styleNode = document.createElement("style");
Text styleContent = document.createTextNode("* { font-family: Arial, Helvetica, san-serif !important; }");
styleNode.appendChild(styleContent);
document.getDocumentElement().getElementsByTagName("head").item(0).appendChild(styleNode);
}
});
}
private void mapResized() {
if (initialized && map != null) {
webengine.executeScript("google.maps.event.trigger(" + map.getVariableName() + ", 'resize')");
}
}
public void setKey(String key) {
this.key = key;
}
public void setZoom(int zoom) {
checkInitialized();
map.setZoom(zoom);
}
public void setCenter(double latitude, double longitude) {
checkInitialized();
LatLong latLong = new LatLong(latitude, longitude);
map.setCenter(latLong);
}
public GoogleMap getMap() {
checkInitialized();
return map;
}
public GoogleMap createMap(MapOptions mapOptions) {
return createMap(mapOptions, false);
}
public GoogleMap createMap() {
return createMap(null, false);
}
public GoogleMap createMap(boolean withDirectionsPanel) {
return createMap(null, withDirectionsPanel);
}
public GoogleMap createMap(MapOptions mapOptions, boolean withDirectionsPanel) {
checkInitialized();
if (mapOptions != null) {
map = internal_createMap(mapOptions);
} else {
map = internal_createMap();
}
direc = new DirectionsPane();
if (withDirectionsPanel) {
map.showDirectionsPane();
}
map.addStateEventHandler(MapStateEventType.projection_changed, () -> {
if (map.getProjection() != null) {
mapResized();
fireMapReadyListeners();
}
});
return map;
}
protected GoogleMap internal_createMap() {
return new GoogleMap();
}
protected GoogleMap internal_createMap(MapOptions mapOptions) {
return new GoogleMap(mapOptions);
}
public DirectionsPane getDirec() {
return direc;
}
public void addMapInitializedListener(MapComponentInitializedListener listener) {
synchronized (mapInitializedListeners) {
mapInitializedListeners.add(listener);
}
}
public void removeMapInitializedListener(MapComponentInitializedListener listener) {
synchronized (mapInitializedListeners) {
mapInitializedListeners.remove(listener);
}
}
public void addMapReadyListener(MapReadyListener listener) {
synchronized (mapReadyListeners) {
mapReadyListeners.add(listener);
}
}
public void removeReadyListener(MapReadyListener listener) {
synchronized (mapReadyListeners) {
mapReadyListeners.remove(listener);
}
}
public Point2D fromLatLngToPoint(LatLong loc) {
checkInitialized();
return map.fromLatLngToPoint(loc);
}
public void panBy(double x, double y) {
checkInitialized();
map.panBy(x, y);
}
public boolean isDisableDoubleClick() {
return disableDoubleClick;
}
public void setDisableDoubleClick(boolean disableDoubleClick) {
this.disableDoubleClick = disableDoubleClick;
}
protected void setInitialized(boolean initialized) {
this.initialized = initialized;
}
protected void fireMapInitializedListeners() {
synchronized (mapInitializedListeners) {
for (MapComponentInitializedListener listener : mapInitializedListeners) {
listener.mapInitialized();
}
}
}
protected void fireMapReadyListeners() {
synchronized (mapReadyListeners) {
for (MapReadyListener listener : mapReadyListeners) {
listener.mapReady();
}
}
}
protected JSObject executeJavascript(String function) {
Object returnObject = webengine.executeScript(function);
return (JSObject) returnObject;
}
protected String getJavascriptMethod(String methodName, Object... args) {
StringBuilder sb = new StringBuilder();
sb.append(methodName).append("(");
for (Object arg : args) {
sb.append(arg).append(",");
}
sb.replace(sb.length() - 1, sb.length(), ")");
return sb.toString();
}
protected void checkInitialized() {
if (!initialized) {
throw new MapNotInitializedException();
}
}
public WebView getWebview() {
return webview;
}
public class MapLibraryLoadBridge {
public MapLibraryLoadBridge() {
}
public void mapLibraryLoaded() {
setInitialized(true);
fireMapInitializedListeners();
}
}
public class MyEventDispatcher implements EventDispatcher {
private final EventDispatcher originalDispatcher;
public MyEventDispatcher(EventDispatcher originalDispatcher) {
this.originalDispatcher = originalDispatcher;
}
@Override
public Event dispatchEvent(Event event, EventDispatchChain tail) {
if (event instanceof MouseEvent) {
MouseEvent mouseEvent = (MouseEvent) event;
if (mouseEvent.getClickCount() > 1) {
if (disableDoubleClick) {
mouseEvent.consume();
}
}
}
return originalDispatcher.dispatchEvent(event, tail);
}
}
}
