I'm new to customizing widgets and haven't been able to access some methods that are specific to the JavaScript API that according to a development summit session should be accessible.
I'm working on a custom widget that was created from the CustomWidget template directory. For learning purposes I'm trying to simply show or hide a layer using the snippet below that was included in a developer summit session:
this.projectsLayer = this.map.getLayer('LayerName');
this.projectsLayer.show();
This is contained within the onOpen attribute / event.
onOpen: function(){
this.inherited(arguments);
console.log('onOpen');
this.projectsLayer = this.map.getLayer('LayerName');
this.projectsLayer.show();
},
In the developer summit session it was stated that since this widget is inheriting from BaseWidget it should have access to the map instance. When I run this application in Chrome the developer tools console shows the error: TypeError: Cannot read property 'show' of undefined. this.map in the console displays the HTML of the map. Trying this.map.getBasemap() or this.map.getLayersVisibleAtScale() both trigger TypeError: this.map.getBasemap or this.map.getLayersVisibleAtScale is not a function.
I'm unsure if these methods are outside the scope of BaseWidget or if I am somehow missing a reference.
The beginning of Widget.js is unchanged:
define(['dojo/_base/declare', 'jimu/BaseWidget'],
function(declare, BaseWidget) {
Any help with this is appreciated.
