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Win32 file dialog: Prefill the filename when saving

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Henrik Rydgård committed 2026-03-07 09:49:57 +01:00
1 parent 66b8e866fb
commit 9a7241708c
7 files changed
+30 -37
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Windows/W32Util/ShellUtil.cpp
+11 -21
View File
@@ -114,40 +114,30 @@ std::string BrowseForFolder2(HWND parent, std::string_view title, std::string_vi
}
bool BrowseForFileName(bool _bLoad, HWND _hParent, const wchar_t *_pTitle,
const wchar_t *_pInitialFolder, const wchar_t *_pFilter, const wchar_t *_pExtension,
const wchar_t *_pInitialFolder, const wchar_t *initialFilename, const wchar_t *_pFilter, const wchar_t *_pExtension,
std::string &_strFileName) {
// Let's hope this is large enough, don't want to trigger the dialog twice...
std::wstring filenameBuffer(32768 * 10, '\0');
wchar_t fileBuffer[2048]{};
wchar_t fileNameBuffer[2048]{};
if (initialFilename) {
wcscpy_s(fileBuffer, initialFilename);
}
OPENFILENAME ofn{ sizeof(OPENFILENAME) };
auto resetFileBuffer = [&] {
ofn.nMaxFile = (DWORD)filenameBuffer.size();
ofn.lpstrFile = &filenameBuffer[0];
if (!_strFileName.empty())
wcsncpy(ofn.lpstrFile, ConvertUTF8ToWString(_strFileName).c_str(), filenameBuffer.size() - 1);
};
resetFileBuffer();
ofn.lpstrInitialDir = _pInitialFolder;
ofn.lpstrFilter = _pFilter;
ofn.lpstrFileTitle = nullptr;
ofn.nMaxFileTitle = 0;
ofn.lpstrFileTitle = fileNameBuffer;
ofn.nMaxFileTitle = ARRAY_SIZE(fileNameBuffer);
ofn.lpstrDefExt = _pExtension;
ofn.hwndOwner = _hParent;
ofn.lpstrFile = fileBuffer;
ofn.nMaxFile = ARRAY_SIZE(fileBuffer);
ofn.Flags = OFN_NOCHANGEDIR | OFN_EXPLORER;
if (!_bLoad)
ofn.Flags |= OFN_HIDEREADONLY;
int success = _bLoad ? GetOpenFileName(&ofn) : GetSaveFileName(&ofn);
if (success == 0 && CommDlgExtendedError() == FNERR_BUFFERTOOSMALL) {
size_t sz = *(unsigned short *)&filenameBuffer[0];
// Documentation is unclear if this is WCHARs to CHARs.
filenameBuffer.resize(filenameBuffer.size() + sz * 2);
resetFileBuffer();
success = _bLoad ? GetOpenFileName(&ofn) : GetSaveFileName(&ofn);
}
if (success) {
_strFileName = ConvertWStringToUTF8(ofn.lpstrFile);
return true;