topic Fnd the selected layer in the ArcMap Table Of Contents in Python Questions

Fnd the selected layer in the ArcMap Table Of Contents

PeterHewetson — Wed, 09 May 2012 17:32:51 GMT

Is there an ArcPy equivalent to IMXDocument::SelectedItem to get the selected layer in the ArcMap Table of Contents?...

Dim pMxDoc As IMxDocument
Dim pLayer As ILayer

Set pMxDoc = ThisDocument
Set pLayer = pMxDoc.SelectedItem

Re: Fnd the selected layer in the ArcMap Table Of Contents

StephenKruzik — Wed, 09 May 2012 18:03:24 GMT

now is this something where you know which layer is to be selected, or you're trying to figure it out?

If you already know the layers in the TofC, you can list them using the following in the python window

[HTML]mxd = arcpy.mapping.MapDocument("insert path to mxd here, or if within arcmap use "CURRENT" ")
arcpy.mapping.Listayers(mxd)[/HTML]

That will get you all of the layers in the TOC. If it's more than that, then I don't think I'm quite clear on what you're looking for. I'm not a VB guy, so I don't know what IMXDocument::SelectedItem actually means.

Re: Fnd the selected layer in the ArcMap Table Of Contents

PeterHewetson — Thu, 10 May 2012 12:39:18 GMT

now is this something where you know which layer is to be selected, or you're trying to figure it out?

If you already know the layers in the TofC, you can list them using the following in the python window

[HTML]mxd = arcpy.mapping.MapDocument("insert path to mxd here, or if within arcmap use "CURRENT" ")
arcpy.mapping.Listayers(mxd)[/HTML]

That will get you all of the layers in the TOC. If it's more than that, then I don't think I'm quite clear on what you're looking for. I'm not a VB guy, so I don't know what IMXDocument::SelectedItem actually means.

Yes, that will return a list of all the map layers. I was wondering if there was a way to reduce that list to just those layers selected by the user in the ArcMap TOC. It would allow a quick method of inputing a particular layer(s) into a script.

Re: Fnd the selected layer in the ArcMap Table Of Contents

JasonScheirer — Thu, 10 May 2012 14:18:26 GMT

Not in 10.0. In 10.1, you can use GetSelectedTOCLayerOrDataFrame.

Geometry-type of the selected layer in the ArcMap Table Of Contents

ThorstenDey — Wed, 11 Jul 2012 17:48:57 GMT

This hint was very helpful.

But what kind of object is delivered by the "GetSelectedTOCLayerOrDataFrame-method"? I want to implement a new python addin, that applies a given symbology-file (lyr) to the selected layer in the TOC. I generated 3 lyr-files, one for each geometry-type (point, line, polygon), that hold all symbols of hundreds of shape-files in our system. And here is my question:
How can I get the geometry-type of the "GetSelectedTOCLayerOrDataFrame-object" in order to apply the right lyr-file.
Thanks in advance.

Re: Fnd the selected layer in the ArcMap Table Of Contents

JeffBarrette — Sat, 11 Dec 2021 08:53:13 GMT

Have you tried arcpy.Describe?

The following was typed in the Python Window:

>>>mxd = arcpy.mapping.MapDocument("current")
>>>lyr = arcpy.mapping.ListLayers(mxd)[0]
>>> desc = arcpy.Describe(lyr)
>>> print desc.shapeType
Point