topic Re: confused about the graphicAdd in ArcGIS API for Flex Questions

confused about the graphicAdd

LeiZhou — Wed, 12 Jan 2011 15:37:19 GMT

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!

Re: confused about the graphicAdd

RobertScheitlin__GISP — Wed, 12 Jan 2011 15:52:48 GMT

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

Re: confused about the graphicAdd

ReneRubalcava — Wed, 12 Jan 2011 15:53:01 GMT

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.

Re: confused about the graphicAdd

LeiZhou — Wed, 12 Jan 2011 19:43:43 GMT

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