[GIS] Executing ArcMap AddIn function when there is mouse click on map

arcgis-10.0arcmaparcobjectsvbvisual studio

I am developing an add-in for ArcMap 10.0 where I need to execute code when there is a click on the map open. How do I do this? I am using VB in Visual Studio 2010. I also need to get the coordinates from the click event.

Best Answer

If you have created an add-in and added a ESRI.ArcGIS.Desktop.AddIns.Tool to it then stub out the following event:

Protected Overrides Sub OnMouseDown(ByVal arg As
    ESRI.ArcGIS.Desktop.AddIns.Tool.MouseEventArgs)

' --write your function here--

End Sub

arg.X and arg.Y will be the coordinates where the user clicked.

You will most likely want to convert the x and y values to the transformation used by the display:

Dim mxDoc As IMxDocument = CType(My.ArcMap.Application.Document, IMxDocument)   
Dim clickedPoint As ESRI.ArcGIS.Geometry.IPoint =
    mxDoc.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(arg.X, arg.Y)

Related Solutions

[GIS] Implementing mouse down event when user clicks on map using ArcObjects

There is nothing wrong with your code. It works fine. You are doing it right. I can select the tool, click on the map and the coordinates are displayed in the message box.

To convert to map units add references to ESRI.ArcGIS.Display, ESRI.ArcGIS.Geometry and ESRI.ArcGIS.Carto

and replace the OnMouseDown with this

public override void OnMouseDown(int Button, int Shift, int X, int Y)
        {
            ESRI.ArcGIS.Display.IScreenDisplay screenDisplay = (m_application.Document as IMxDocument).ActiveView.ScreenDisplay;
            ESRI.ArcGIS.Geometry.IPoint point = screenDisplay.DisplayTransformation.ToMapPoint(X, Y);

            MessageBox.Show("X position is " + point.X.ToString() + "Y position is :" + point.Y.ToString());
        }

Edit: You don't "call the mouse down event". The code you place in the OnMouseDown function is executed when the map is clicked. OnMouseDown is an event handler.

ArcMap Add-in – Is It Possible to Target an Add-in to an Earlier Version

It's possible to make it work with ArcMap 10.0, but it's not easy and deployment-friendly

First, in your visual studio project, set your target framework to .NET Framework 3.5.

Then, edit the Config.esriaddinx file and modify the "Targets" section to add compatibility with ArcGIS Desktop 10.0, like this:

  <Targets>
    <Target name="Desktop" version="10.0" />
    <Target name="Desktop" version="10.1" />
  </Targets>

Finally, as described in an older post, you have to alter the ArcMap.exe.config by adding the following line inside each "dependentAssembly" block

<bindingRedirect oldVersion="10.1.0.0" newVersion="10.0.0.0"/>

Once modified, it should look like this

    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="ESRI.ArcGIS.ADF" culture="" publicKeyToken="8fc3cc631e44ad86"/>
        <bindingRedirect oldVersion="9.3.0.0-9.3.2.0" newVersion="10.0.0.0"/>
        <bindingRedirect oldVersion="10.1.0.0" newVersion="10.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>

I came to the conclusion that even if it's possible, I'm better off compiling with the lowest version of ArcMap I'm willing to support.

EDIT: See also Rich Wawrzonek's post for an alternative (not recommended by ESRI)

EDIT2: According to Esri, the best way is set up a virtual machine with 10.0 installed on it (see this post)

Best Answer

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[GIS] Implementing mouse down event when user clicks on map using ArcObjects

ArcMap Add-in – Is It Possible to Target an Add-in to an Earlier Version

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