confused about the graphicAdd

Question

I am very confused about the graphicAdd event as in the following:

<esri:FeatureLayer graphicAdd="featurelayer1_graphicAddHandler(event)"
                           outFields="[FIPS,POP2000]"
                           url="http://sampleserver188888888">

graphicAdd is event of GraphicsLayer, not FeatureLayer.  But why it can be used for FeatureLayer? Thanks!

LeiZhou · Answer

Thanks a lot!Steven,

It is because FeatureLayer inherits from GraphicsLayer

As explained in the documentation here:

http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/FeatureLayer.html

ReneRubalcava · Answer

You can do that because FeatureLayer is a subclass of GraphicsLayer
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/FeatureLayer.html

It inherits all the methods/fields of a GraphicsLayer, but some such as clear have been overriden so they don't do anything.

RobertScheitlin__GISP · Answer

Steven,

It is because FeatureLayer inherits from GraphicsLayer

As explained in the documentation here:

http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/FeatureLayer.html