Can't set initial map centerPoint and resolution

AnatoliiTerentiev — Sat, 11 Dec 2021 13:50:25 GMT

Dear Gurus!

Unexpected problem.

For some operations I decide to show new tab with copy of the Map element from the current tab (in the tabControl).

            <esri:Map x:Name="MyMap"  Background="White" WrapAround="true" 
                  Extent="3200000,8500000,4250000,10130000">
                <esri:OpenStreetMapLayer ID="OSMLayer" Style="Mapnik" />
                <esri:ArcGISDynamicMapServiceLayer ID="Карта РК" 
                            Url="http://myServer:6080/ArcGIS/rest/services/karelia/MapServer" />
                <esri:GraphicsLayer ID="MyGraphicsLayer" MouseLeftButtonDown="GraphicsLayer_MouseLeftButtonDown" />
        </esri:Map>

And want to set centerPoint and resolution from the first tab. In the next event

        <i:Interaction.Triggers>
            <i:EventTrigger EventName="Loaded">
                <i:InvokeCommandAction Command="{Binding SetMapRefCommand, Mode=OneWay}"
                                CommandParameter="{Binding ElementName=MyMap,Mode=OneWay}" />
            </i:EventTrigger>
        </i:Interaction.Triggers>

as follows in the ViewModel for this control

public void SetMapRef(object item)
{
     myMap = (Map)item;
     MapModule.ViewModels.MapViewModel.centerAndZoom(myMap, currentCentrPointFromFirst, MapResolutionFromFirst);
 }

Where centerAndZoom procedure is

       public static void centerAndZoom(ESRI.ArcGIS.Client.Map map, ESRI.ArcGIS.Client.Geometry.MapPoint mapPoint, double resolution)
        {
            double ratio = 1.0;
            if (map.Resolution != 0.0)
                ratio = resolution / map.Resolution;
           if (ratio == 1.0)
                map.PanTo(mapPoint);
            else
            {
                ESRI.ArcGIS.Client.Geometry.MapPoint mapCenter = map.Extent.GetCenter();
                double X = (mapPoint.X - ratio * mapCenter.X) / (1 - ratio);
                double Y = (mapPoint.Y - ratio * mapCenter.Y) / (1 - ratio);
                map.ZoomToResolution(resolution, new ESRI.ArcGIS.Client.Geometry.MapPoint(X, Y));
            }
        }

But it does not work. When I do it from the click button Event - all works fine. I can't understand - what is the reason...

How to fix?

Re: Can't set initial map centerPoint and resolution

AnatoliiTerentiev — Tue, 30 Jun 2015 14:47:32 GMT

I want to create several views with the same Map element for different task. I am using Prism and want to be able to load views in the different regions with the same parameteres of the map. Can I do it and how if it is possible?

topic Can't set initial map centerPoint and resolution in ArcGIS API for Silverlight Questions

Can't set initial map centerPoint and resolution

Re: Can't set initial map centerPoint and resolution