Data Transfer, COM Enums, and Windows Controls

Listing 7 Permutations of enum_simple_sequence<> and functionals in test program.

using comstl::enum_simple_sequence;
using comstl::input_cloning_policy;
using comstl::LPOLESTR_policy;
using comstl::BSTR_policy;
using winstl::listbox_back_inserter;
using winstl::combobox_back_inserter;
using winstl::listview_back_inserter;

static void MOCtlFns_Test_Put(HWND hwnd)
{
  LPUNKNOWN punk;
  HRESULT   hr        = MOCtlFns_Test_GetEnumerator(hwnd,
                              IID_IUnknown,
                              reinterpret_cast<void**>(&punk));
  HWND      hwndList  = MOCtlFns_Test_GetListWindow(hwnd);

  if(SUCCEEDED(hr))
  {
    HWND  hwndTab   = ::GetDlgItem(hwnd, IDC_TAB);
    int   iCurSel   = TabCtrl_GetCurSel(hwndTab);
    int   idList    = Tab_GetItemData(hwndTab, iCurSel);

    if(::IsDlgButtonChecked(hwnd, IDC_STRING))
    {
      LPENUMSTRING  penum;

      hr = punk->QueryInterface(IID_IEnumString, 
                        reinterpret_cast<void**>(&penum));

      if(SUCCEEDED(hr))
      {
typedef enum_simple_sequence
                    < IEnumString
                    , LPOLESTR
                    , LPOLESTR_policy
                    , LPCOLESTR
                    , input_cloning_policy<IEnumString>
                    , 5
                    >   enum_sequence_t;

        // Declare the sequence (and eat the reference)
        enum_sequence_t   values(penum, false);

        switch(idList)
        {
          case  IDC_LISTBOX:
            std::for_each(values.begin(), values.end(), 
                            listbox_back_inserter(hwndList));
            ListBox_ResetContent(hwndList);
            break;
          case  IDC_COMBOBOX:
            std::for_each(values.begin(), values.end(), 
                            combobox_back_inserter(hwndList));
            ComboBox_ResetContent(hwndList);
            break;
          case  IDC_LISTVIEW:
            std::for_each(values.begin(), values.end(), 
                            listview_back_inserter(hwndList));
            ListView_DeleteAllItems(hwndList);
            break;
        }
      }
    }
    else if(::IsDlgButtonChecked(hwnd, IDC_BSTR))
    {
      LPENUMBSTR penum;

      hr = punk->QueryInterface(IID_IEnumBSTR,
                        reinterpret_cast<void**>(&penum));

      if(SUCCEEDED(hr))
      {
typedef enum_simple_sequence
                    < IEnumBSTR
                    , BSTR
                    , BSTR_policy
                    , BSTR const
                    , input_cloning_policy<IEnumBSTR>
                    , 5
                    >   enum_sequence_t;

        // Declare the sequence (and eat the reference)
        enum_sequence_t   values(penum, false);

        switch(idList)
        {
          case  IDC_LISTBOX:
            std::for_each(values.begin(), values.end(), 
                            listbox_back_inserter(hwndList));
            ListBox_ResetContent(hwndList);
            break;
          case  IDC_COMBOBOX:
            std::for_each(values.begin(), values.end(), 
                            combobox_back_inserter(hwndList));
            ComboBox_ResetContent(hwndList);
            break;
          case  IDC_LISTVIEW:
            std::for_each(values.begin(), values.end(), 
                            listview_back_inserter(hwndList));
            ListView_DeleteAllItems(hwndList);
            break;
        }
      }
    }
    else
    {
      . . . // etc. etc.
    }

    punk->Release();
  }
}