Calculate Field using Esri Python Addin

Question

I am trying to select a polygon then it must automatically change (calculate) the status to "C". The tool seems to work in the background but nothing actually happens (the status is not updated). I have used the code from Select and copy features in ArcMap using Python add-in tool but nothing actually gets selected. If I have a feature in the layer selected already it does deselect it though.

Below is the code that i am using. Is there something that I have gotten wrong?

import arcpy
import pythonaddins
def getSearchDistanceInches(scale, selection_tolerance=3):
 """Returns the map distance in inches that corresponds to the input selection
 tolerance in pixels (default 3) at the specified map scale."""
 return scale * selection_tolerance / 96.0 # DPI used by ArcMap when reporting scale
class tlStatToC(object):
 """Implementation for PythonAddin_addin.tlMapCoods (Tool)"""
 def __init__(self):
 self.enabled = True
 self.shape = "NONE" # Can set to "Line", "Circle" or "Rectangle" for interactive shape drawing and to activate the onLine/Polygon/Circle event sinks.
 def onMouseDownMap(self, x, y, button, shift):
 mxd = arcpy.mapping.MapDocument("CURRENT")
 pointGeom = arcpy.PointGeometry(arcpy.Point(x, y), mxd.activeDataFrame.spatialReference)
 searchdistance = getSearchDistanceInches(mxd.activeDataFrame.scale)
 lyr = arcpy.mapping.ListLayers(mxd)[0] # assumes you want to select features from 1st layer in TOC
 arcpy.SelectLayerByLocation_management(lyr, "INTERSECT", pointGeom)
 arcpy.RefreshActiveView()
 arcpy.CalculateField_management(lyr,"STATUS","C")

Answer 1

You left off the search distance argument to SelectLayerByLocation. This is important -- for some reason, without it, a PointGeometry object will never intersect anything, at least in my limited testing.

Change:

arcpy.SelectLayerByLocation_management(lyr, "INTERSECT", pointGeom)

To:

arcpy.SelectLayerByLocation_management(lyr, "INTERSECT", pointGeom, "%d INCHES" % searchdistance)