Add wx headers and ext

wxheaders/wx/msw/private/filedialog.h

@@ -0,0 +1,89 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/private/filedialog.h
+// Purpose:     IFileDialog-related functions
+// Author:      Vadim Zeitlin
+// Created:     2022-05-15
+// Copyright:   (c) 2022 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MSW_PRIVATE_FILEDIALOG_H_
+#define _WX_MSW_PRIVATE_FILEDIALOG_H_
+
+#include "wx/msw/private.h"
+#include "wx/msw/wrapshl.h"
+
+// We want to use IFileDialog if either wxDirDialog or wxFileDialog are used.
+//
+// IFileOpenDialog implementation needs wxDynamicLibrary for
+// run-time linking SHCreateItemFromParsingName(), available
+// only under Windows Vista and newer.
+// It also needs a compiler providing declarations and definitions
+// of interfaces available in Windows Vista.
+// And it needs OLE support to actually use these interfaces.
+#if (wxUSE_DIRDLG || wxUSE_FILEDLG) && wxUSE_DYNLIB_CLASS && wxUSE_OLE && \
+    defined(__IFileOpenDialog_INTERFACE_DEFINED__)
+    #define wxUSE_IFILEOPENDIALOG 1
+#else
+    #define wxUSE_IFILEOPENDIALOG 0
+#endif
+
+#if wxUSE_IFILEOPENDIALOG
+
+#include "wx/msw/private/comptr.h"
+
+namespace wxMSWImpl
+{
+
+// For historical reasons, this class is defined in src/msw/dirdlg.cpp.
+class wxIFileDialog
+{
+public:
+    // Create the dialog of the specified type.
+    //
+    // CLSID must be either CLSID_FileOpenDialog or CLSID_FileSaveDialog.
+    //
+    // Use IsOk() to check if the dialog was created successfully.
+    explicit wxIFileDialog(const CLSID& clsid);
+
+    // If this returns false, the dialog can't be used at all.
+    bool IsOk() const { return m_fileDialog.Get() != NULL; }
+
+    // Set the dialog title.
+    void SetTitle(const wxString& title);
+
+    // Set the initial path to show in the dialog.
+    void SetInitialPath(const wxString& path);
+
+    // Add a shortcut.
+    void AddPlace(const wxString& path, FDAP fdap);
+
+    // Show the file dialog with the given parent window and options.
+    //
+    // Returns the selected path, or paths, in the provided output parameters,
+    // depending on whether FOS_ALLOWMULTISELECT is part of the options.
+    //
+    // The return value is wxID_OK if any paths were returned, wxID_CANCEL if the
+    // dialog was cancelled.
+    int
+    Show(HWND owner, int options, wxArrayString* pathsOut, wxString* pathOut);
+
+    // Behave as IFileDialog.
+    IFileDialog* Get() const { return m_fileDialog.Get(); }
+    IFileDialog* operator->() const { return m_fileDialog.Get(); }
+
+private:
+    wxCOMPtr<IFileDialog> m_fileDialog;
+};
+
+// Initialize an IShellItem object with the given path.
+HRESULT InitShellItemFromPath(wxCOMPtr<IShellItem>& item, const wxString& path);
+
+// Extract the filesystem path corresponding to the given shell item.
+HRESULT GetFSPathFromShellItem(const wxCOMPtr<IShellItem>& item, wxString& path);
+
+} // namespace wxMSWImpl
+
+#endif // wxUSE_IFILEOPENDIALOG
+
+#endif // _WX_MSW_PRIVATE_FILEDIALOG_H_