topic Re: Communication between Widget and TOC Component in ArcGIS Viewer for Flex Questions

Communication between Widget and TOC Component

NitinBele — Fri, 22 Jul 2011 04:16:56 GMT

Hello,
How can I fetchSharedData() From TocItemRender.as ?
Any suggestions ?

Thanks ,
Lu.

Re: Communication between Widget and TOC Component

RobertScheitlin__GISP — Fri, 22 Jul 2011 11:18:59 GMT

Lu,

In the past I have just traversed up the parent list until I got to the widget. Probably not the best way but it worked.

Re: Communication between Widget and TOC Component

NitinBele — Sat, 23 Jul 2011 00:18:22 GMT

Thanks Robert !
Could you pls help me with some sample code for traversing to Widget from the component ?

Lu

Re: Communication between Widget and TOC Component

RobertScheitlin__GISP — Sat, 23 Jul 2011 00:54:03 GMT

Lu,

Maybe you should tell me your workflow and or objective, the more I think about this the more complicated it is getting.

Re: Communication between Widget and TOC Component

NitinBele — Sun, 24 Jul 2011 03:33:29 GMT

Lu,

Maybe you should tell me your workflow and or objective, the more I think about this the more complicated it is getting.

Thanks Robert for your time !.
My workflow - i have a widget "W1" and I want to enable a specific Layer in the TOC (visibility on and off ) only after I get an input from "W1" say hit a "ok" button.

My workaround:
calling addsharedData() in "W1" and passing a boolean value in arraycollection.
fetching the boolean value in TocItemRender.as to on\off the specific Layer.
But i did not get fetchshareddata() funtion here.

please help me out if you could suggest me a better logic or a way to get to fetchSharedData()
TocItemRender.as .

Thanks Robert again for youe ultimate support.
Lu

Re: Communication between Widget and TOC Component

RobertScheitlin__GISP — Sat, 11 Dec 2021 20:25:28 GMT

Lu,

So the only thing the fetchSharedData function is doing is dispatching an appEvent:

ViewerContainer.dispatchEvent(new AppEvent(AppEvent.DATA_FETCH_ALL));

Which in turn dispatches this event:

ViewerContainer.dispatchEvent(new AppEvent(AppEvent.DATA_SENT, dataTable));

in the DataManager.as.

So from W1 dispatch this event:

var data:Object =
            {
                key: key,
                collection: arrayCollection
            };
        ViewerContainer.dispatchEvent(new AppEvent(AppEvent.DATA_PUBLISH, data));

and in the toc add this listener:

ViewerContainer.addEventListener(AppEvent.DATA_PUBLISH, sharedDataUpdated);

Then just a function that handles the event:

private function sharedDataUpdated(event:AppEvent):void
            {
                var data:Object = event.data;

                if (data.key == "your Key Name")
                {
                    //todo
                }
            }

Re: Communication between Widget and TOC Component

NitinBele — Mon, 25 Jul 2011 10:41:00 GMT

Thanks Robert ! It worked really great.
I only need to change
from

ViewerContainer.addEventListener(AppEvent.DATA_PUBLISH, sharedDataUpdated);

ViewerContainer.addEventListener(AppEvent.DATA_NEW_PUBLISHED, sharedDataUpdated);

Lu.