プログラマ専用SNS ミクプラ

コード:

#include <Windows.h>

class GetOpenFileDir
{
public:
	GetOpenFileDir();
	GetOpenFileDir( GetOpenFileDir& ) = delete;
	~GetOpenFileDir();
	int run( HWND hWnd );
private:
	static TCHAR* _expandMem( TCHAR* _OldString,const size_t& Size );
private:
	static UINT_PTR CALLBACK OFNHook( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
	bool          _isChoseDir;  //ディレクトリを選択するかどうか
	TCHAR*        _chosed;
	TCHAR         _chosed_s[32];
	OPENFILENAME  _ofn;         //カスタムしていく構造体
};

コード:

GetOpenFileDir::GetOpenFileDir() :
	_isChoseDir(), _chosed(), _ofn()
{
}

GetOpenFileDir::~GetOpenFileDir()
{
	free( _chosed );
	_chosed = nullptr;
}

int GetOpenFileDir::run( HWND hWnd )
{
	_ofn.lStructSize = sizeof( OPENFILENAME );
	_ofn.hwndOwner = hWnd;
	_ofn.lpstrFile = _chosed_s;
	_ofn.nMaxFile = std::size( _chosed_s );
	_ofn.Flags |= OFN_EXPLORER |       //Explorer Style
				  OFN_ENABLESIZING |   //サイズを変更できるようにする
			      OFN_ENABLEHOOK;      //フックプロシージャを使う
	_ofn.lpfnHook = OFNHook;
	_ofn.lCustData = reinterpret_cast<LPARAM>( &( *this ) );

	auto _Ret = GetOpenFileName( &_ofn );
	_ofn.lCustData = 0;

	return _Ret;
}

TCHAR* GetOpenFileDir::_expandMem( TCHAR* _OldString, const size_t& Size )
{
	return reinterpret_cast<TCHAR*>(
		( _OldString == nullptr ) ?
		calloc( Size, sizeof( TCHAR ) ) :
		_recalloc( _OldString, Size , sizeof( TCHAR ) ) );
}

UINT_PTR GetOpenFileDir::OFNHook( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
	switch (uMsg) {
	case WM_INITDIALOG:
		return TRUE;
	case WM_NOTIFY:{
		LPOFNOTIFY lpFnNotify = reinterpret_cast<LPOFNOTIFY>( lParam );
		auto*   _This = reinterpret_cast<GetOpenFileDir*>( lpFnNotify->lpOFN->lCustData );
		switch (lpFnNotify->hdr.code) {
		case CDN_FILEOK: {
			//ファイル名を取得する
			auto _Parent = GetParent( hDlg );
			auto _Size = CommDlg_OpenSave_GetFilePath( _Parent, nullptr, 0 );
			if (_Size > std::size( _This->_chosed_s )) {
				_This->_chosed = _expandMem( _This->_chosed, _Size );
				CommDlg_OpenSave_GetFilePath( _Parent, _This->_chosed, _Size );
				ZeroMemory( _This->_chosed_s, sizeof( _This->_chosed_s ) );
			}
			return TRUE;
		}
		case CDN_FOLDERCHANGE: {
			return TRUE;
		}
		}
	}
	}

	return FALSE;
}

コード:

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
	GetOpenFileDir _Dir;

	_Dir.run( nullptr );

	return 0;
}