LayerInfo class
The LayerInfo class uses the unified interface to access layers in the web map.
Caution:
The LayerInfo class is deprecated. Use the LayerNode class instead.
AMD Module Require
require(["jimu/LayerInfos/LayerInfo"], function(LayerInfo) { /* code goes here */ });
Properties
<String> id The layer ID defined in the web map. |
<esri/map> map The current web map object. |
<LayerInfo> parentLayerInfo The parent LayerInfo of the current LayerInfo. The value is null if there is no parent LayerInfo. |
<String> title The title of the layer. |
Methods
findLayerInfoById(layerId) Recursively finds the LayerInfo in the subLayerInfos. Returns null if the LayerInfo cannot be found. Return type: <LayerInfo> Parameters: <String> url—Required. The REST service URL. <String> layerId—Required. The layer ID. |
getExtent() Gets the current extent of the layer in the map. Return type: <Extent> |
getLayerObject() Gets the layer object defined in the map. Return type: <Deferred> |
getLayerType() Gets the layer type. Return type: <Deferred> |
getOpacity() Gets the opacity or transparency of the layer in the map. Return type: <Number> |
getSubLayers() Gets an array including all subLayerInfos of the current layer. Returns [] if the layer has no sublayers. Return type: Object[<LayerInfo> layerInfo, …] |
getUrl() Gets the layer URL. Returns null if the layer has no URL. Return type: <String> |
isLeaf() Returns true if the layer is a leaf layer. Otherwise, returns false. Return type: <Boolean> |
isRootLayer() Returns true if the layer is a root layer. Otherwise, returns false. Return type: <Boolean> |
setOpacity(opacity) Sets layer opacity or transparency in the map. Return type: <Number> Parameters: <Number> opacity—The value can be from 0 to 1, where 0 is 100 percent transparent and 1 has no transparency. |
traversal(callback) Traverses all the sublayers with Depth-First-Search. Parameters: <Function> callback (layerInfo)—Required. Called by each layer and sends LayerInfo as a parameter. The layer can be handled in the callback. Callback parameters: <LayerInfo> Callback return type: <Boolean> Callback return value:
Example: |