Map pinpoint on mouse click

[Finbarr]

Hi,

Is it possible to add a map pin point on a mouse click event,using the mvvm pattern?

Thanks

[Andrey]

Hi Finbarr,

Yes, it is possible. You can use the RadMap.MapMouseClick event.
I would recommend to take a look at the following online example:
http://demos.telerik.com/silverlight/#Map/DataBinding

Regards,
Andrey Murzov
Telerik

[Finbarr]

Sorry,I want to fire a command in my viewmodel when the mouse is clicked?

[Andrey]

Hi Finbarr,

You can create a method in your viewmodel. And you can invoke it in the handler of the RadMap.MapMouseClick event.

Regards,
Andrey Murzov
Telerik

[Gauthier]

Unfortunately, I don't see this as a real solution.

You have to write code in the codebehind of your view (or usercontrol), which should be avoided in a clean MVvM approach.
(Testability ? , 'Blendability ?', ....)


For a map control, it appears so common that we need to now the coordinates clicked by the user, I would expect that it is feasible to really bind a command on the viewmodel, and not having to handle an event in the codebehind. 

[Andrey]

Hello Gauthier,

I am afraid RadMap doesn't expose any commands which can be handled in your model. Only events are available.

Best regards,
Andrey Murzov
Telerik

[Stuart]

Hi Gauthier,

The interactivity library can solve this problem: 

1. Download "System.Windows.Interactivity.WPF" from NuGet.
2. Add a command to your ViewModel
3. Add an interaction trigger to your RadMap to fire your command on click:

  <i:Interaction.Triggers>
                <i:EventTrigger EventName="MapMouseClick">
                    <i:InvokeCommandAction Command="{Binding ClickedCommand}" />
                </i:EventTrigger>
            </i:Interaction.Triggers>

Regards,
Stuart

[Andrey]

Hello Stuart,

Unfortunately your approach will not work in this case. The InvokeCommandAction can't pass event arguments as command parameters. But arguments of the RadMap.MapMouseClick event contains geographical location of the place where mouse button has been clicked. It is very important to pass it to the command. The alternative is creation of own behavior. You can find samples in the Internet. For example, here:

http://stackoverflow.com/a/16317999/677857

Regards,
Andrey Murzov
Telerik