feat: add some dialog code which can not work now.
- add common file dialog showcase code but all of them are not work now.
This commit is contained in:
@ -69,9 +69,219 @@ namespace YYCC::DialogHelper {
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#pragma endregion
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#pragma region FileDialog
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#pragma region File Dialog
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bool FileDialog::Generate(WinFileDialog& win_result) const {
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return false;
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}
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#pragma endregion
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#pragma region Windows Dialog Code
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enum class CommonFileDialogType {
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OpenFile,
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OpenMultipleFiles,
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SaveFile,
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OpenFolder
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};
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using SmartFileDialogPtr = std::unique_ptr<IFileDialog, std::function<void(IFileDialog*)>>;
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template<CommonFileDialogType EDialogType>
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bool CommonFileDialog(const FileDialog& params, std::vector<std::string>& ret) {
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// Reference: https://learn.microsoft.com/en-us/windows/win32/shell/common-file-dialog
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// prepare result variable
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HRESULT hr;
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// create file dialog instance
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// fetch dialog CLSID first
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CLSID dialog_clsid;
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switch (EDialogType) {
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case CommonFileDialogType::OpenFile:
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case CommonFileDialogType::OpenMultipleFiles:
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case CommonFileDialogType::OpenFolder:
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dialog_clsid = CLSID_FileOpenDialog;
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break;
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case CommonFileDialogType::SaveFile:
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dialog_clsid = CLSID_FileSaveDialog;
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break;
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default:
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return false;
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}
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// create raw dialog pointer
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IFileDialog* _pfd = nullptr;
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hr = CoCreateInstance(
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dialog_clsid,
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NULL,
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CLSCTX_INPROC_SERVER,
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IID_PPV_ARGS(&_pfd)
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);
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if (!SUCCEEDED(hr)) return false;
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// create memory-safe dialog pointer
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SmartFileDialogPtr pfd(
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_pfd,
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[](IFileDialog* instance) -> void {
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if (instance != nullptr)
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instance->Release();
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}
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);
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// set options for dialog
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// before setting, always get the options first in order.
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// not to override existing options.
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DWORD dwFlags;
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hr = pfd->GetOptions(&dwFlags);
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if (!SUCCEEDED(hr)) return false;
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// modify options
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switch (EDialogType) {
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// We want user only can pick file system files: FOS_FORCEFILESYSTEM.
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// Open dialog default: FOS_PATHMUSTEXIST | FOS_FILEMUSTEXIST | FOS_NOCHANGEDIR
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// Save dialog default: FOS_OVERWRITEPROMPT | FOS_NOREADONLYRETURN | FOS_PATHMUSTEXIST | FOS_NOCHANGEDIR
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// Pick folder: FOS_PICKFOLDERS
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case CommonFileDialogType::OpenFile:
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dwFlags |= FOS_FORCEFILESYSTEM;
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dwFlags |= FOS_PATHMUSTEXIST | FOS_FILEMUSTEXIST | FOS_NOCHANGEDIR;
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break;
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case CommonFileDialogType::OpenMultipleFiles:
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dwFlags |= FOS_FORCEFILESYSTEM;
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dwFlags |= FOS_PATHMUSTEXIST | FOS_FILEMUSTEXIST | FOS_NOCHANGEDIR;
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dwFlags |= FOS_ALLOWMULTISELECT;
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break;
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case CommonFileDialogType::SaveFile:
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dwFlags |= FOS_FORCEFILESYSTEM;
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dwFlags |= FOS_OVERWRITEPROMPT | FOS_NOREADONLYRETURN | FOS_PATHMUSTEXIST | FOS_NOCHANGEDIR;
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break;
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case CommonFileDialogType::OpenFolder:
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dwFlags |= FOS_FORCEFILESYSTEM;
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dwFlags |= FOS_PATHMUSTEXIST | FOS_FILEMUSTEXIST | FOS_NOCHANGEDIR;
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dwFlags |= FOS_PICKFOLDERS;
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break;
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default:
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return false;
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}
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// set folder dialog options
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hr = pfd->SetOptions(dwFlags);
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if (!SUCCEEDED(hr)) return false;
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// set title
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std::wstring wtitle, winit_filename, winit_directory;
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if (params.GetTitle() != nullptr) {
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EncodingHelper::UTF8ToWchar(params.GetTitle(), wtitle);
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}
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// set file types and default file index when we picking file
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WinFileFilters win_file_filters;
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if constexpr (EDialogType != CommonFileDialogType::OpenFolder) {
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// generate data from user specified file filters
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const auto& file_filters = params.GetFileTypes();
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if (!file_filters.Generate(win_file_filters))
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return false;
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// set file types list
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hr = pfd->SetFileTypes(win_file_filters.GetFilterCount(), win_file_filters.GetFilterSpecs());
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if (!SUCCEEDED(hr)) return false;
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// set default file type index
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// Windows order this is 1-based index.
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// We plus 1 for it because we used is 0-based index.
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hr = pfd->SetFileTypeIndex(params.GetDefaultFileTypeIndex() + 1);
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if (!SUCCEEDED(hr)) return false;
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}
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// CoCreate the File Open Dialog object.
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IFileDialog* pfd = NULL;
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HRESULT hr = CoCreateInstance(
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CLSID_FileOpenDialog,
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NULL,
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CLSCTX_INPROC_SERVER,
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IID_PPV_ARGS(&pfd)
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);
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if (SUCCEEDED(hr)) {
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// Set the options on the dialog.
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DWORD dwFlags;
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// Before setting, always get the options first in order
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// not to override existing options.
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hr = pfd->GetOptions(&dwFlags);
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if (SUCCEEDED(hr)) {
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// In this case, get shell items only for file system items.
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hr = pfd->SetOptions(dwFlags | FOS_FORCEFILESYSTEM);
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if (SUCCEEDED(hr)) {
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// Set the file types to display only.
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// Notice that this is a 1-based array.
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hr = pfd->SetFileTypes(ARRAYSIZE(c_rgSaveTypes), c_rgSaveTypes);
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if (SUCCEEDED(hr)) {
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// Set the selected file type index to Word Docs for this example.
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hr = pfd->SetFileTypeIndex(INDEX_WORDDOC);
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if (SUCCEEDED(hr)) {
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// Set the default extension to be ".doc" file.
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hr = pfd->SetDefaultExtension(L"doc;docx");
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if (SUCCEEDED(hr)) {
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// Show the dialog
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hr = pfd->Show(NULL);
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if (SUCCEEDED(hr)) {
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// Obtain the result once the user clicks
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// the 'Open' button.
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// The result is an IShellItem object.
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IShellItem* psiResult;
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hr = pfd->GetResult(&psiResult);
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if (SUCCEEDED(hr)) {
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// We are just going to print out the
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// name of the file for sample sake.
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PWSTR pszFilePath = NULL;
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hr = psiResult->GetDisplayName(SIGDN_FILESYSPATH,
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&pszFilePath);
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if (SUCCEEDED(hr)) {
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TaskDialog(NULL,
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NULL,
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L"CommonFileDialogApp",
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pszFilePath,
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NULL,
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TDCBF_OK_BUTTON,
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TD_INFORMATION_ICON,
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NULL);
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CoTaskMemFree(pszFilePath);
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}
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psiResult->Release();
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}
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}
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}
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}
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}
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}
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}
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pfd->Release();
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}
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return SUCCEEDED(hr);
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}
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#pragma endregion
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#pragma region Wrapper Functions
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bool OpenFileDialog(const FileDialog& params, std::string& ret) {
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std::vector<std::string> cache;
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bool isok = CommonFileDialog<CommonFileDialogType::OpenFile>(params, cache);
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if (isok) ret = cache.front();
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return isok;
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}
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bool OpenMultipleFileDialog(const FileDialog& params, std::vector<std::string>& ret) {
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return CommonFileDialog<CommonFileDialogType::OpenMultipleFiles>(params, ret);
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}
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bool SaveFileDialog(const FileDialog& params, std::string& ret) {
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std::vector<std::string> cache;
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bool isok = CommonFileDialog<CommonFileDialogType::SaveFile>(params, cache);
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if (isok) ret = cache.front();
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return isok;
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}
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bool OpenFolderDialog(const FileDialog& params, std::string& ret) {
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std::vector<std::string> cache;
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bool isok = CommonFileDialog<CommonFileDialogType::OpenFolder>(params, cache);
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if (isok) ret = cache.front();
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return isok;
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}
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#pragma endregion
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