tflex cad loader

1.py

#encoding: utf-8


import os
import platform
from Microsoft.Win32 import Registry
import System

import clr 
clr.AddReference('System.Windows.Forms')

import System.Windows.Forms as WinForms

class ApiLoader:
    def __init__(self):
        self._cadPath = self.get_path("T-FLEX CAD 3D 14", "Rus");
        self._initialized = False
        System.AppDomain.CurrentDomain.AssemblyResolve += self.assembly_resolve

    def get_path(self, productName, language):
        if not productName or not language:
            return None

        if platform.architecture()[0] == '64bit':
            productName += 'x64'

        reg_path = 'SOFTWARE\\TOP Systems\\%s\\%s' % (productName, language)
        
        key = Registry.LocalMachine.OpenSubKey(reg_path) 
        if not key:
            return
        path = key.GetValue('ProductFolder', None)
        if not path:
            path = key.GetValue('SetupHelpPath', None)
        key.Close()
        return path

    def assembly_resolve(self, sender, args):
        if not self._cadPath:
            return
        try:
            #name = args.Name
            name = args
            if ',' in name:
                name = name.split(',')[0]
            filename = os.path.join(self._cadPath, name)
            if not os.path.exists(filename):
                print('-')
                return

            os.chdir(self._cadPath)
            return System.Reflection.Assembly.LoadFile(filename)
        except Exception as ex:
            msg = "Ошибка загрузки сборки %s:\n%s" %(name, ex.message)
            WinForms.MessageBox.Show(msg, "Ошибка", WinForms.MessageBoxButtons.OK, WinForms.MessageBoxIcon.Error)


    def InitializeTFlexCADAPI(self):
        if self._initialized:
            return True
        if not self._cadPath:
            raise Exception('T-FLEX CAD is not installed')

        # Перед работой с API T-FLEX CAD его необходимо инициализировать
        # В зависимости от параметров инициализации, будут или не будут
        # доступны функции изменения документов и сохранение документов в файл.
        # За это отвечает параметр setup.ReadOnly.
        # Если setup.ReadOnly = false, то для работы программы требуется
        # лицензия на сам T-FLEX CAD
        setup = TFlex.ApplicationSessionSetup()
        setup.ReadOnly = False
        self._initialized = TFlex.Application.InitSession(setup)
        return self._initialized

    def Dispose(self):
        if self._initialized:
            TFlex.Application.ExitSession();
            self._initialized = False