Magnify and Magnifying Glass Example

Question

Hi,

I have having some porting issues from the Silverlight Magnify and Magnifyingglass examples.

Are the Silverlight SDK examples going to be ported across to the ArcGIS Viewer samples?

An example of the code behind that works with the ArcGIS Viewer would be great.

private Map MyMap;
        private MagnifyingGlass mGlass = new MagnifyingGlass();

MyMap = MapApplication.Current.Map;

ArcGISTiledMapServiceLayer arcgisMagnifyingLayer = new ArcGISTiledMapServiceLayer();
            arcgisMagnifyingLayer.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer";
            mGlass.Layer = arcgisMagnifyingLayer;
            mGlass.Visibility = Visibility.Visible;
            mGlass.ZoomFactor = 3;
            mGlass.Map = MyMap;
            mGlass.IsEnabled = true;

This doesn't seem to work.

KatherineDalton · Answer

Hi Stephen, I'm glad to hear the demo went well. I worked up a bit of code and chatted with the team about some ideas for bringing over tools from the ArcGIS SL API Toolkit such as the magnifying glass. Our recommendation is to use FloatingWindow.Show instead of MapApplication.Current.Map.Show() and then change the style of the FloatingWindow so that the window isn't visible and you only see the control (magnfiying glass). This is recommended in cases where you don't necessarily want to put the control directly in to the layout, but placing it in the layout is a good workflow as well (and we have a sample to demonstrate). While the Time Slider sample and one or two others demonstrate using code-behind, we (as a team) are hoping to encourage keeping less code in code-behind if possible and even moving towards practices such as MVVM. Our Bookmarks and Locate Address samples are both examples of using MVVM. One key piece that I think you will find helpful is using the MapApplicationBindingSource in the UserControl.Resources xaml as below. I've also attached a MagnifyingGlass.Addins project demonstrating adding the MagnifyingGlass to a Viewer application. This uses IToggleCommand instead of ICommand but otherwise works the same as any tool you would add to the toolbar. You'll also notice that I have a Resource Dictionary that holds the style for the Floating Window. I created this by using Microsoft Expression Blend and manually editing the FloatingWindow template. Let me know if you have any questions on this project. For debugging, you can debug directly from the Visual Studio project. There is a bit of debugging info in the Visual" rel="nofollow" target="_blank">http://help.arcgis.com/en/webapps/silverlightviewer/help/index.html#/Visual_Studio_template/01770000000w000000/]Visual Studio template topic, but if you have more questions, please post back and let us know. Katy MagnifyingGlass.AddIns.zip traceGeometric.rar

Stephen_Bebb · Answer

Hi,

Just a quick update.

It appears there is an issue with our fused cache map service spatial reference, even though all 4 layers share the exact same projection.

We can see and connect to it through the Browse button, and then expand the service hierarchy and see 4 layers. But we can't add it to the Map Contents. We get the error:

" Layer could not be added.Reason for failure: Cached Map Service reference does not match. "

However, the exact same mxd that is also hosted as a dynamic map service works just fine.

I have sent it through ESRI support.

Thanks again for the help.

Stephen_Bebb · Answer

Hi Katy,

Yes, thanks so much - its great. Everyone is really impressed. Concept Demo went well.

We have managed to get it to work. I prefer the code behind so I can step through and debug easier.

One slight hiccup,

Fused Maps hosted by ESRI are builot on JPEG with a compression.  These all work (see below) withthe magnify.

However, our Fused Map service was created with PNG 32.  This doesn't work.  I am currently creating a Fused Map service with JPEG to see if this is the issue.

e.g.

THIS WORKS (JPEG)->>  
magnify_layer.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer";

OR

THIS WORKS (JPEG)->>  
magnify_layer.Url = "http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer";

BUT THIS DOESN'T WORK (PNG)   ->> 
magnify_layer.Url = "http://qaedevsom:82/ArcGIS/rest/services/infrastructure_magnify/MapServer";