Kick version

package.json

@@ -1,6 +1,6 @@
 {
   "name": "farmmaps-lib-app",
-  "version": "2.1.2",
+  "version": "2.1.3",
   "scripts": {
     "ng": "ng",
     "start": "ng serve",

projects/common-map/src/fm-map/components/aol/item-layers/item-layers.component.ts

@@ -364,16 +364,12 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
     }
   }
 
-  installTopLayerPrerenderEventhandler() {
-    if(!this.topLayerPrerenderEventhandlerInstalled  && this.onPrerender.observers.length > 0 ) {
+  installTopLayerPrerenderEventhandler(olLayer : Layer<Source>) {
+    if(!this.topLayerPrerenderEventhandlerInstalled  && this.onPrerender.observers.length > 0  && olLayer) {
       if(this.instance.getVisible()) {
-        var olLayers = this.instance.getLayers().getArray().filter(l=> l.getVisible());
-        if(olLayers.length >0) {
-          var topLayer = olLayers[0] as any;
-          topLayer.on('prerender',this.topLayerPrerenderEventhandler);
-          topLayer.on('postrender',this.topLayerPostrenderEventhandler);
-          this.topLayerPrerenderEventhandlerInstalled = true;
-        }  
+        olLayer.on('prerender',this.topLayerPrerenderEventhandler);
+        olLayer.on('postrender',this.topLayerPostrenderEventhandler);
+        this.topLayerPrerenderEventhandlerInstalled = true;
       }
     }
   }
@@ -382,13 +378,11 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
     if(this.topLayerPrerenderEventhandlerInstalled && this.onPrerender.observers.length > 0 )
     {
       if(this.instance.getVisible()) {
-        var olLayers = this.instance.getLayers().getArray().filter(l=> l.getVisible());
-        if(olLayers.length >0) {
-          var topLayer = olLayers[0] as any;
-          topLayer.un('prerender',this.topLayerPrerenderEventhandler);
-          topLayer.un('postrender',this.topLayerPostrenderEventhandler);
-          this.topLayerPrerenderEventhandlerInstalled = false;
-        }  
+        var olLayers = this.instance.getLayers().getArray().forEach((l:any) => {
+          l.un('prerender',this.topLayerPrerenderEventhandler);
+          l.un('postrender',this.topLayerPostrenderEventhandler);
+        });
+        this.topLayerPrerenderEventhandlerInstalled = false;
       }
     }
   }
@@ -418,11 +412,19 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
     return layer;
   }
 
-  updateLayers(itemLayers: IItemLayer[]) {
+  updateLayers(itemLayers: IItemLayer[] | IItemLayer) {
     this.unInstallTopLayerPrerenderEventhandler();
+    let dataLayer = false;
+    var ils:IItemLayer[] = [];
+    if(Array.isArray(itemLayers)) {
+       ils = itemLayers;
+    } else {
+      dataLayer=true;
+       ils=[itemLayers];
+    }
     let newLayers: Layer<Source>[] = [];
-    if (itemLayers) {
-      itemLayers.forEach((itemLayer, index) => {
+    if (ils) {
+      ils.forEach((itemLayer, index) => {
         if(itemLayer.item.itemType ==  'vnd.farmmaps.itemtype.temporal') {
           let il = itemLayer as ITemporalItemLayer;
           let previousLayer = this.addOrUpdateOlLayer(il.previousItemLayer,newLayers.length);          
@@ -431,9 +433,11 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
           if(selectedLayer) newLayers.push(selectedLayer);
           let nextLayer = this.addOrUpdateOlLayer(il.nextItemLayer,newLayers.length);
           if(nextLayer) newLayers.push(nextLayer);
+          this.installTopLayerPrerenderEventhandler(selectedLayer);
         } else {
           let layer = this.addOrUpdateOlLayer(itemLayer,newLayers.length);
           if(layer) newLayers.push(layer);    
+          this.installTopLayerPrerenderEventhandler(layer);       
         }
       });
       // Remove the layers that have disapeared from childrenLayers
@@ -442,12 +446,11 @@ export class ItemLayersComponent extends LayerGroupComponent implements OnChange
         olLayers.removeAt(newLayers.length);
       }
       this.selectionLayer=null;
-      if(this.mapEventHandlerInstalled && itemLayers.length==1 && this.getItemlayer(itemLayers[0]).item.itemType == 'vnd.farmmaps.itemtype.shape.processed') {
+      if(this.mapEventHandlerInstalled && ils.length==1 && this.getItemlayer(itemLayers[0]).item.itemType == 'vnd.farmmaps.itemtype.shape.processed') {
         this.selectionLayer = this.createSelectionLayer(this.getItemlayer(itemLayers[0]));
         if(this.selectionLayer) olLayers.push(this.selectionLayer)
       }
     }
-    this.installTopLayerPrerenderEventhandler();
   }
 
   topLayerPrerenderEventhandler = (event) => {