Fix problem with layer control by adding a method 'addOrUpdateOverlay'

prushfor · prushfor · commit 92ba8c128aaa · 2018-02-16T17:48:40.000-05:00
which emulates old leaflet addOverlay behaviour by not adding the layer 
if it already exists, but it updates the layer name in the legend control.
diff --git a/map-layer.html b/map-layer.html
@@ -141,7 +141,7 @@
                 this.parentElement._layerControl.removeLayer(this._layer);
             } else {
                 this._layerControl = this.parentElement._layerControl;
-                this._layerControl.addOverlay(this._layer,this.label);
+                this._layerControl.addOrUpdateOverlay(this._layer,this.label);
             }
             this._validateDisabled();
         }
@@ -200,7 +200,7 @@
         // if controls option is enabled, insert the layer into the overlays array
         if (Polymer.dom(this).parentNode.controls && !this.hidden) {
           this._layerControl = Polymer.dom(this).parentNode._layerControl;
-          this._layerControl.addOverlay(this._layer, this.label);
+          this._layerControl.addOrUpdateOverlay(this._layer, this.label);
         }
         // toggle the this.disabled attribute depending on whether the layer
         // is: same prj as map, within view/zoom of map

Original file line number	Diff line number	Diff line change
`@@ -141,7 +141,7 @@`
`141`	`141`	`this.parentElement._layerControl.removeLayer(this._layer);`
`142`	`142`	`} else {`
`143`	`143`	`this._layerControl = this.parentElement._layerControl;`
`144`		`- this._layerControl.addOverlay(this._layer,this.label);`
	`144`	`+ this._layerControl.addOrUpdateOverlay(this._layer,this.label);`
`145`	`145`	`}`
`146`	`146`	`this._validateDisabled();`
`147`	`147`	`}`
`@@ -200,7 +200,7 @@`
`200`	`200`	`// if controls option is enabled, insert the layer into the overlays array`
`201`	`201`	`if (Polymer.dom(this).parentNode.controls && !this.hidden) {`
`202`	`202`	`this._layerControl = Polymer.dom(this).parentNode._layerControl;`
`203`		`- this._layerControl.addOverlay(this._layer, this.label);`
	`203`	`+ this._layerControl.addOrUpdateOverlay(this._layer, this.label);`
`204`	`204`	`}`
`205`	`205`	`// toggle the this.disabled attribute depending on whether the layer`
`206`	`206`	`// is: same prj as map, within view/zoom of map`