std::vector<std::wstring> APlayerWindow::showOpenFile()
{
HRESULT hr = S_OK;
std::vector<std::wstring> filePaths;
IFileOpenDialog *fileDlg = NULL;
hr = CoCreateInstance(CLSID_FileOpenDialog,
NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&fileDlg));
if (FAILED(hr)) return filePaths;
ON_SCOPE_EXIT([&] { fileDlg->Release(); });
IKnownFolderManager *pkfm = NULL;
hr = CoCreateInstance(CLSID_KnownFolderManager,
NULL,
CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&pkfm));
if (FAILED(hr)) return filePaths;
ON_SCOPE_EXIT([&] { pkfm->Release(); });
IKnownFolder *pKnownFolder = NULL;
hr = pkfm->GetFolder(FOLDERID_PublicMusic, &pKnownFolder);
if (FAILED(hr)) return filePaths;
ON_SCOPE_EXIT([&] { pKnownFolder->Release(); });
IShellItem *psi = NULL;
hr = pKnownFolder->GetShellItem(0, IID_PPV_ARGS(&psi));
if (FAILED(hr)) return filePaths;
ON_SCOPE_EXIT([&] { psi->Release(); });
hr = fileDlg->AddPlace(psi, FDAP_BOTTOM);
COMDLG_FILTERSPEC rgSpec[] = {
{ L"ÒôÀÖÎļþ", SupportType }
};
fileDlg->SetFileTypes(1, rgSpec);
DWORD dwOptions;
fileDlg->GetOptions(&dwOptions);
fileDlg->SetOptions(dwOptions | FOS_ALLOWMULTISELECT);
hr = fileDlg->Show(NULL);
if (SUCCEEDED(hr)) {
IShellItemArray *pRets;
hr = fileDlg->GetResults(&pRets);
if (SUCCEEDED(hr)) {
DWORD count;
pRets->GetCount(&count);
for (DWORD i = 0; i < count; i++) {
IShellItem *pRet;
LPWSTR nameBuffer;
pRets->GetItemAt(i, &pRet);
pRet->GetDisplayName(SIGDN_DESKTOPABSOLUTEPARSING, &nameBuffer);
filePaths.push_back(std::wstring(nameBuffer));
pRet->Release();
CoTaskMemFree(nameBuffer);
}
pRets->Release();
}
}
return filePaths;
}
// Processes a single argument which identifies the library to operate on; passes any remaining arguments to the derived class.
HRESULT v_ProcessArguments(PCWSTR *ppszArgs, int cArgs)
{
PCWSTR pszLibPath = CONSUME_NEXT_ARG(ppszArgs, cArgs);
HRESULT hr = pszLibPath ? S_OK : E_INVALIDARG;
if (SUCCEEDED(hr))
{
if (_fCreate)
{
// When creating a new library, interpret the argument as the file system path to save the library to.
WCHAR szAbsPath[MAX_PATH];
hr = SHStrDupW(_wfullpath(szAbsPath, pszLibPath, ARRAYSIZE(szAbsPath)), &_pszSavePath);
}
else
{
// Check for the 'FOLDERID_' prefix, which indicates that the argument should be interpreted as a KNOWNFOLDERID.
const WCHAR szPrefix[] = L"FOLDERID_";
const UINT cchPrefix = ARRAYSIZE(szPrefix) - 1;
if (StrCmpNCW(pszLibPath, szPrefix, cchPrefix) == 0)
{
IKnownFolderManager *pkfm;
hr = CoCreateInstance(CLSID_KnownFolderManager, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pkfm));
if (SUCCEEDED(hr))
{
// KNOWNFOLDERIDs are GUIDs, but they have a corresponding canonical name which is a string.
// By convention, the canonical name is the same as the name of the KNOWNFOLDERID #define.
// That is, FOLDERID_DocumentsLibrary => "DocumentsLibrary". So, skip the prefix and pass
// the remainder to GetFolderByName to retrieve the known folder.
IKnownFolder *pkf;
hr = pkfm->GetFolderByName(pszLibPath + cchPrefix, &pkf);
if (SUCCEEDED(hr))
{
hr = pkf->GetShellItem(KF_FLAG_INIT, IID_PPV_ARGS(&_psiLibrary));
pkf->Release();
}
pkfm->Release();
}
}
else
{
// Default - interpret the argument as a file system path, and create a shell item for it.
WCHAR szAbsPath[MAX_PATH];
hr = SHCreateItemFromParsingName(_wfullpath(szAbsPath, pszLibPath, ARRAYSIZE(szAbsPath)), NULL, IID_PPV_ARGS(&_psiLibrary));
}
}
}
else
{
ParseError(L"Missing library path argument.\n");
}
if (SUCCEEDED(hr))
{
// Allow derived command to process any remaining arguments.
hr = v_ProcessLibArguments(ppszArgs, cArgs);
}
return hr;
}