Selection not working after cutting polylines using line geometry in ArcGIS Desktop Python add-in

AminulIslam — Mon, 07 Mar 2016 10:00:38 GMT

Hi,

I am creating a ArcGIS Desktop Python add-in that has a tool to cut polylines of a layer by drawing lines across, just like the cut polygon tools in editor mode. I am able to cut polylines with my tool and save it but the problem is; I am unable to select properly any polylines of that layer after my cut operation. My add-in code is given below. onLine method of CutTool is called when the mouse button is double-clicked to finish drawing the line on the map.

class CutTool(object):

"""Implementation for PlugIn_addin.tool (Tool)"""

def __init__(self):

self.enabled = True

self.shape = "Line"

def cut_geometry(self, to_cut, sel_fid_query, cutter):

"""

Cut a feature by a line, splitting it into its separate geometries.

:param to_cut: The feature to cut.

:param sel_fid_query: Selected Query FID to cut.

:param cutter: The polylines to cut the feature by.

:return: The feature with the split geometry added to it.

"""

arcpy.AddField_management(to_cut, "SOURCE_OID", "LONG")

geometries = None

polyline = None

edit = arcpy.da.Editor(os.path.dirname(to_cut))

# Edit session is started without an undo/redo stack for versioned data (for second argument, use False for unversioned data)

edit.startEditing(False, True)

# Start an edit operation

edit.startOperation()

insert_cursor = arcpy.da.InsertCursor(to_cut, ["SHAPE@", "SOURCE_OID"])

with arcpy.da.UpdateCursor(to_cut, ["SHAPE@", "OID@", "FID"], sel_fid_query) as polylines:

for polyline in polylines:

if cutter.disjoint(polyline[0]) == False:

geometries = polyline[0].cut(cutter)

polylines.deleteRow()

if geometries:

for geometry in geometries:

insert_cursor.insertRow([geometry, polyline[1]])

# Stop the edit operation.

edit.stopOperation()

# Stop the edit session and save the changes

edit.stopEditing(True)

def onLine(self, line_geometry):

mxd = arcpy.mapping.MapDocument("CURRENT")

df = mxd.activeDataFrame

layers = arcpy.mapping.ListLayers(mxd)

to_cut = None

sel_list = None

query = None

# Find the selected layer and selected polylines of that layer

for layer in layers:

desc = arcpy.Describe(layer)

if desc.shapeType == "Polyline" \

and hasattr(desc, 'fidSet') and desc.fidSet:

to_cut = layer

sel_list = desc.fidSet.split(";")

query = 'FID IN ('

for sel_id in sel_list:

if sel_id != sel_list[0]:

query += ","

query += sel_id

query += ')'

break

if to_cut:

self.cut_geometry(to_cut.dataSource, query, line_geometry)

else:

pythonaddins.MessageBox("There is no selection.", "Cut Polyline Features", 0)

pass

Re: Selection not working after cutting polylines using line geometry in ArcGIS Desktop Python add-in

WesMiller — Mon, 07 Mar 2016 18:30:39 GMT

Sounds similar to Limit combobox results to map extent you may need to create a polyline object then use a select by location

Re: Selection not working after cutting polylines using line geometry in ArcGIS Desktop Python add-in

AminulIslam — Wed, 09 Mar 2016 06:29:29 GMT

Thanks for your reply. Actually, I am using the selection tool of the ArcMap to select lines splitted by my tool. So, selection using the mouse (after selection tool is active) is not working.

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Selection not working after cutting polylines using line geometry in ArcGIS Desktop Python add-in

Re: Selection not working after cutting polylines using line geometry in ArcGIS Desktop Python add-in

Re: Selection not working after cutting polylines using line geometry in ArcGIS Desktop Python add-in