SwtJSMapPart.java

   1 package org.argeo.app.geo.swt;
   2
   3 import java.util.concurrent.CompletionStage;
   4 import java.util.function.Consumer;
   5 import java.util.function.Function;
   6 import org.argeo.app.geo.GeoUtils;
   7 import org.argeo.app.geo.ux.JsImplementation;
   8 import org.argeo.app.geo.ux.MapPart;
   9 import org.argeo.app.swt.js.SwtBrowserJsPart;
  10 import org.eclipse.swt.widgets.Composite;
  11
  12 /**
  13  * An SWT implementation of {@link MapPart} based on JavaScript.
  14  */
  15 public class SwtJSMapPart extends SwtBrowserJsPart implements MapPart {
  16         static final long serialVersionUID = 2713128477504858552L;
  17
  18         private String jsImplementation = JsImplementation.OPENLAYERS_MAP_PART.getJsClass();
  19         private final String mapName;// = "argeoMap";
  20
  21         public SwtJSMapPart(String mapName, Composite parent, int style) {
  22                 super(parent, style, "/pkg/org.argeo.app.geo.js/index.html");
  23                 this.mapName = mapName;
  24         }
  25
  26         @Override
  27         protected void init() {
  28                 // create map
  29                 doExecute(getJsMapVar() + " = new " + jsImplementation + "('" + mapName + "');");
  30         }
  31
  32         /*
  33          * MapPart.js METHODS
  34          */
  35
  36         @Override
  37         public void addPoint(double lng, double lat, String style) {
  38                 callMapMethod("addPoint(%f, %f, %s)", lng, lat, style == null ? "'default'" : style);
  39         }
  40
  41         @Override
  42         public void addUrlLayer(String url, GeoFormat format, String style) {
  43                 callMapMethod("addUrlLayer('%s', '%s', %s, false)", url, format.name(), style);
  44         }
  45
  46         public void addCssUrlLayer(String url, GeoFormat format, String css) {
  47                 String style = GeoUtils.createSldFromCss("layer", "Layer", css);
  48                 callMapMethod("addUrlLayer('%s', '%s', '%s', true)", url, format.name(), style);
  49         }
  50
  51         @Override
  52         public void setZoom(int zoom) {
  53                 callMapMethod("setZoom(%d)", zoom);
  54         }
  55
  56         @Override
  57         public void setCenter(double lng, double lat) {
  58                 callMapMethod("setCenter(%f, %f)", lng, lat);
  59         }
  60
  61         protected CompletionStage<Object> callMapMethod(String methodCall, Object... args) {
  62                 return callMethod(getJsMapVar(), methodCall, args);
  63         }
  64
  65         private String getJsMapVar() {
  66                 return getJsVarName(mapName);
  67         }
  68
  69         /*
  70          * CALLBACKS
  71          */
  72         public void onFeatureSelected(Consumer<FeatureSelectedEvent> toDo) {
  73                 addCallback("FeatureSelected", (arr) -> {
  74                         toDo.accept(new FeatureSelectedEvent((String) arr[0]));
  75                         return null;
  76                 });
  77         }
  78
  79         public void onFeatureSingleClick(Consumer<FeatureSingleClickEvent> toDo) {
  80                 addCallback("FeatureSingleClick", (arr) -> {
  81                         toDo.accept(new FeatureSingleClickEvent((String) arr[0]));
  82                         return null;
  83                 });
  84         }
  85
  86         public void onFeaturePopup(Function<FeaturePopupEvent, String> toDo) {
  87                 addCallback("FeaturePopup", (arr) -> {
  88                         return toDo.apply(new FeaturePopupEvent((String) arr[0]));
  89                 });
  90         }
  91
  92         protected void addCallback(String suffix, Function<Object[], Object> toDo) {
  93                 getReadyStage().thenAccept((ready) -> {
  94                         String functionName = createJsFunction(mapName + "__on" + suffix, toDo);
  95                         doExecute(getJsMapVar() + ".callbacks['on" + suffix + "']=" + functionName + ";");
  96                         callMethod(mapName, "enable" + suffix + "()");
  97                 });
  98         }
  99 }