IFileDialog.dart (extract)

IFileDialog.dart

import 'dart:ffi';
import 'package:ffi/ffi.dart';

// more imports

import 'IModalWindow.dart';

/// @nodoc
const IID_IFileDialog = '{42f85136-db7e-439c-85f1-e4075d135fc8}';

typedef _SetFileTypes_Native = Int32 Function(
    Pointer obj, Uint32 cFileTypes, Pointer<COMDLG_FILTERSPEC> rgFilterSpec);
typedef _SetFileTypes_Dart = int Function(
    Pointer obj, int cFileTypes, Pointer<COMDLG_FILTERSPEC> rgFilterSpec);

typedef _SetFileTypeIndex_Native = Int32 Function(
    Pointer obj, Uint32 iFileType);
typedef _SetFileTypeIndex_Dart = int Function(Pointer obj, int iFileType);

//...

/// {@category Interface}
/// {@category com}
class IFileDialog extends IModalWindow {
  // vtable begins at 4, ends at 26

  IFileDialog(Pointer<COMObject> ptr) : super(ptr);

  int SetFileTypes(int cFileTypes, Pointer<COMDLG_FILTERSPEC> rgFilterSpec) =>
      Pointer<NativeFunction<_SetFileTypes_Native>>.fromAddress(
                  ptr.ref.vtable.elementAt(4).value)
              .asFunction<_SetFileTypes_Dart>()(
          ptr.ref.lpVtbl, cFileTypes, rgFilterSpec);

  int SetFileTypeIndex(int iFileType) =>
      Pointer<NativeFunction<_SetFileTypeIndex_Native>>.fromAddress(
              ptr.ref.vtable.elementAt(5).value)
          .asFunction<_SetFileTypeIndex_Dart>()(ptr.ref.lpVtbl, iFileType);
          
  // ...
  
}