Selecting objects in Python for AutoCAD

 

Selecting objects, PyRx has both ARX style and kind of .NET inspired methods for selecting. The selection methods return values as a tuple, with the first value always being the status (PromptStatus), the second is the selection set class. Selection methods, should always have an overloaded version that excepts a filter, a list of tuples representing a result buffer. Let’s start with just the basic select

 

import traceback

import PyRx as Rx

import PyGe as Ge

import PyGi as Gi

import PyDb as Db

import PyAp as Ap

import PyEd as Ed

def PyRxCmd_ss1():

    try:

        # the filter, note, you can use an integer value instead of

        # the DxfCode, similar to whats in AutoLisp

        filter = [(Db.DxfCode.kDxfStart, "LINE")]

        # sometimes I like to annotate types to preserve intellisense

        # Ed.Editor.select

        ssres: tuple[Ed.PromptStatus,

                     Ed.SelectionSet] = Ed.Editor.select(filter)

        # check the result, note eOk is the same as eNormal (RTNORM in ARX)

        if ssres[0] != Ed.PromptStatus.eOk:

            return

        for id in ssres[1].objectIds():

            ent = Db.Entity(id)

            # should only return lines because of the filter

            print(ent.isA().name())

    except Exception as err:

        traceback.print_exception(err)

 

Also available are various overloads

Ed.Editor.selectAll(filter)

Ed.Editor.selectFence(list[Ge.Point3d],filter)

Ed.Editor.selectWindow(Ge.Point3d,Ge.Point3d,filter)

Etc.

 

Next is the ARX style wrapper of acedSSGet, the arguments are the same as the ARX documentation

 

# this is just in case one of the supplied wrappers doesn't fit, roll your own

def PyRxCmd_pyssget1():

  try:

    # pass points using a list

    ssResult = Ed.Editor.ssget(

        "F", [Ge.Point3d(0, 0, 0), Ge.Point3d(100, 100, 0)], None)

    if ssResult[0] == Ed.PromptStatus.eNormal:

      print(len(ssResult[1].objectIds()))

  except Exception as err:

    print(err)

#add and remove prompts

def PyRxCmd_pyssget2():

  try:

    # note this is a tuple

    ssResult = Ed.Editor.ssget("_:$", ("MYADD", "MYREMOVE"), None)

    if ssResult[0] == Ed.PromptStatus.eNormal:

      print(len(ssResult[1].objectIds()))

  except Exception as err:

    print(err)

# nested

def PyRxCmd_pyssget3():

  try:

    ssResult = Ed.Editor.ssget("_:n", None, None)

    if ssResult[0] != Ed.PromptStatus.eNormal:

      return

    # acedSSNameX

    print(ssResult[1].ssNameX())

  except Exception as err:

    print(err)

 

As a side note acedGetCurrentSelectionSet is also wrapped inside the Editor class