Sample

Sample

/*
 * com_object.cpp
 *
 * This sample C++ code initializes the libraries and
 * the COM engine to export a COM object implemented in Lua
 */

#include <ole2.h>

// libraries
extern "C"
{
#include <lua.h>
#include <lualib.h>
}
#include <luacom.h>

int main (int argc, char *argv[])
{
  int a = 0;

  CoInitialize(NULL);

  IupOpen();

  lua_State *L = lua_open(0);

  lua_baselibopen (L);
  lua_strlibopen(L);
  lua_iolibopen(L);

  luacom_open(L);

  lua_dofile(L, "implementation.lua");

  // Pushes the table containing the functions
  // responsible for the initialization of the
  // COM object

  lua_getglobal(L, "COM");

  // detects whether the program was invoked for Automation,
  // registration or none of that

  int result = luacom_detectAutomation(L, argc, argv);

  switch(result)
  {
  case LUACOM_AUTOMATION:
    // runs the message loop, as all the needed initialization
    // has already been performed
    MessageLoop();
    break;

  case LUACOM_NOAUTOMATION:
    // This only works as a COM server
    printf("Error. This is a COM server\n");
    break;

  case LUACOM_REGISTER:
    // Notifies that the COM object has been
    // registered
    printf("COM object successfully registered.");
    break;

  case LUACOM_AUTOMATION_ERROR:
    // detectAutomation found /Automation or /Register but
    // the initialization Lua functions returned some error
    printf("Error starting Automation");
    break;
  }

  luacom_close(L);
  lua_close(L);

  CoUninitialize();

  return 0;
}

-------
-- implementation.lua
--
--   This is a sample implementation of a COM server in Lua
--

-- This is the implementation of the COM object
TestObj = {}

function TestObj:showWindow()
  dialog.show()
end

function TestObj:hideWindow()
  dialog.hide()
end

-- Here we create and populate the table to
-- be used with detectAutomation

COM = {}

-- This functions creates the COM object to be
-- exported and exposes it.
function COM:StartAutomation()
  -- creates the object using its default interface
  COMAppObject, events, e = luacom.NewObject(TestObj, "TESTE.Teste")
  -- This error will be caught by detectAutomation      
  if COMAppObject == nil then
     error("NewObject failed: "..e)
  end
  -- Exposes the object
  cookie = luacom.ExposeObject(COMAppObject)
  if cookie == nil then
     error("ExposeObject failed!")
  end
end

function COM:Register()
  -- fills table with registration information
  local reginfo = {}  
  reginfo.VersionIndependentProgID = "TESTE.Teste"
  reginfo.ProgID = reginfo.VersionIndependentProgID..".1"
  reginfo.TypeLib = "teste.tlb"
  reginfo.CoClass = "Teste"
  reginfo.ComponentName = "Test Component"
  reginfo.Arguments = "/Automation"
  -- stores component information in the registry
  local res = luacom.RegisterObject(reginfo)
  if res == nil then
     error("RegisterObject failed!")
  end
end

function COM:UnRegister()
  -- fills table with registration information
  local reginfo = {}  
  reginfo.VersionIndependentProgID = "TESTE.Teste"
  reginfo.ProgID = reginfo.VersionIndependentProgID..".1"
  reginfo.TypeLib = "teste.tlb"
  reginfo.CoClass = "Teste"
  -- removes component information from the registry
  local res = luacom.UnRegisterObject(reginfo)
  if res == nil then
     error("UnRegisterObject failed!")
  end
end