Layers on/off across different web services

Question

Is there a way to turn layers on/off across different web services programmatically by buttons or a combobox?

Example:

Button1 - Turns off LayerA 1 and LayerB 0. Turns on LayerA 0, LayerB 1 , and LayerB2
Button2 - Turns off LayerA 0, LayerB 1. Turns on LayerA 1 and LayerB 0

Thank you.

RobertMyers · Answer

NOTE: The above "import com.esri.ags.layers.DynamicMapServiceLayer;" should be "import com.esri.ags.layers.ArcGISDynamicMapServiceLayer;"
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I modified the HeaderControllerWidget to add the dropdownlist control and added the services to the config file. (both files attached) Seems to be working when all the layers are "on".  But the LayerListWidget and I think it's the MapSwitchWidget with layers under the "More..." button, do not update to reflect the layers being turned on and off by the dropdownlist control selection. So if layers are off they do not come on.

It seems the LayerListWidget and MapSwitchWidget update each other is some way which is what I think I need to do. How can I cause the two widgets to update with the dropdownlist control?

EDIT: I have found a more recent posting to try. http://forums.arcgis.com/threads/20965-LiveMapsWidget-doesn-t-follow-changes

Thanks.

HeaderControllerWidget_config.zip

rscheitlin · Answer

Robert,

I would definetly add it to the HeaderControllerWidget.mxml.

RobertMyers · Answer

Thank you very much. Always helpful. I was able to hack my way to getting a couple of the buttons working and alternatively, a dropdown list with the same functionality. However, my goal is to add this to the ArcGIS Viewer for Flex with the dropdownlist control in the widget tray. I am not sure how this should be done. Do I create a new widget or do I modify the HeaderController widget to included the dropdownlist control? Bob Parcels, Sales, Foreclosures Assessment Appeals