topic Re: pass map between views in a ViewNavigatorApplication in ArcGIS API for Flex Questions

pass map between views in a ViewNavigatorApplication

MarkYerington — Fri, 15 Mar 2013 14:03:21 GMT

What I am trying to do is develop a simple mobile application in Flash 4.6. I am trying to add layers to a main view based on what is selected in the Table of contents view in a second view. It is a series of check boxes that I would like to select maps and load those into the main map. I have most of the functionality worked out I just can't get the map reference to pass to the other views.

Re: pass map between views in a ViewNavigatorApplication

ChrisNorth — Sat, 16 Mar 2013 01:20:20 GMT

Do you have two separt map controls in the flex application? If so, one method is to loop through each layer in map 1 and add the layers one by one to map 2. I do this for a print preview. Something like...

private function cloneMap():void
{
layerCount = 0;
for (var i:Number = 0; i < map1.layerIds.length; i++)
{
    var layer:Layer = map1.getLayer(map.layerIds);
    if (layer is ArcGISDynamicMapServiceLayer)
    {
      layerCount = layerCount + 1;
      var dynamicLayer:ArcGISDynamicMapServiceLayer = layer as ArcGISDynamicMapServiceLayer;
      var newdl:ArcGISDynamicMapServiceLayer = new ArcGISDynamicMapServiceLayer(url, proxyurl, token);
      newdl.proxyURL = dynamicLayer.proxyURL;
      newdl.token = dynamicLayer.token;
      newdl.alpha = dynamicLayer.alpha;
      newdl.visible = dynamicLayer.visible;
      newdl.visibleLayers = dynamicLayer.visibleLayers;// visiblelyrs;
      newdl.layerDefinitions = dynamicLayer.layerDefinitions;
      newdl.name = dynamicLayer.name;
      newdl.addEventListener(LayerEvent.LOAD, layerLoadComplete);
      map2.addLayer(newdl);
    }
   //... you need to handle all layer types individually, and figure out what you need to transfer.
}

Chris

Re: pass map between views in a ViewNavigatorApplication

MarkYerington — Mon, 18 Mar 2013 12:51:23 GMT

No I just have one map control. What it essentially is, is that I have a map control on the Map View Tab. Then on the TOC tab there are a series of check boxes that I would like to select the layers that are added to the Map Control on a map view tab. My problem is that I cannot reference the Map Control on the map view tab of the application.

Re: pass map between views in a ViewNavigatorApplication

JustinWilson — Sat, 11 Dec 2021 17:49:25 GMT

In the control you want the map to be used add code similar to:

import com.esri.ags.Map;

private var _map:Map

public function set Map(value:Map):void{
     _map = value;
}

Then, from your application - pass a reference to the Map property of your control. Now you can add and remove what you want from your map with your checkbox controls.

tab.Map = myMap

It's difficult to solve without knowing more about your application, but I hope this might help.

Re: pass map between views in a ViewNavigatorApplication

DasaPaddock — Fri, 22 Mar 2013 21:09:26 GMT

You can pass the map as the data parameter to pushView().

See:
http://www.realeyes.com/blog/2011/05/16/mobile-flex-view-data/
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/spark/components/ViewNavigator.html#pushView()

Re: pass map between views in a ViewNavigatorApplication

MarkYerington — Wed, 27 Mar 2013 14:59:27 GMT

Ok don't think I have this set up right. I have two views in a tabbed view navigator mobile app. I have been trying to pass the map from the Map View to the TOC view so I can turn layers on and off then push back to the map view. Here are my functions.

Map View Function

private function onClick(event:MouseEvent):void {

navigator.pushView(views.ToolsView,myMap);


}

"myMap" is the id of the map on the map view.

TOC View Functions

protected var map:Map;
override public function set data(value:Object):void{
    super.data = value;
    map = value as Map;
   }

Trying to add layer to map
if (cb.selected)
    {
     control = new ArcGISDynamicMapServiceLayer("http://xxxxxxxxxx/arcgis/rest/services/MAGIC_Landbase/MuscatineCo_SurveyControl/MapServer");

     control.visible = true;
     map.addLayer(control)
}

It always errors on the map.addLayer saying cannot access property with null object reference. I am very new to the mobile framework, so trying to use the examples that were posted.

Re: pass map between views in a ViewNavigatorApplication

YannCabon — Fri, 29 Mar 2013 01:46:48 GMT

Hi,

Can you verify that "myMap" in not null before calling pushView ?