Define wxDirDialogWrapper, with localized default prompt and name

src/Screenshot.cpp

@@ -531,7 +531,7 @@ void ScreenFrame::OnDirChoose(wxCommandEvent & WXUNUSED(event))
 {
    wxString current = mDirectoryTextBox->GetValue();
 
-   wxDirDialog dlog(this,
+   wxDirDialogWrapper dlog(this,
                     _("Choose a location to save screenshot images"),
                     current);
 

src/export/ExportMultiple.cpp

@@ -480,7 +480,7 @@ void ExportMultiple::OnCreate(wxCommandEvent& WXUNUSED(event))
 
 void ExportMultiple::OnChoose(wxCommandEvent& WXUNUSED(event))
 {
-   wxDirDialog dlog(this,
+   wxDirDialogWrapper dlog(this,
                     _("Choose a location to save the exported files"),
                     mDir->GetValue());
    dlog.ShowModal();

src/prefs/DirectoriesPrefs.cpp

@@ -135,7 +135,7 @@ void DirectoriesPrefs::OnChooseTempDir(wxCommandEvent & e)
    if( !AudacityApp::IsTempDirectoryNameOK( oldTempDir ) )
       oldTempDir = wxGetApp().defaultTempDir;
 
-   wxDirDialog dlog(this,
+   wxDirDialogWrapper dlog(this,
                     _("Choose a location to place the temporary directory"),
                     oldTempDir );
    int retval = dlog.ShowModal();

src/widgets/wxPanelWrapper.h

@@ -100,4 +100,41 @@ public:
    }
 };
 
+#include <wx/dirdlg.h>
+
+class wxDirDialogWrapper : public wxTabTraversalWrapper<wxDirDialog>
+{
+public:
+   wxDirDialogWrapper() {}
+
+   // Constructor with no modal flag - the new convention.
+   wxDirDialogWrapper(
+      wxWindow *parent,
+      const wxString& message = _("Select a directory"),
+      const wxString& defaultPath = wxT(""),
+      long style = wxDD_DEFAULT_STYLE,
+      const wxPoint& pos = wxDefaultPosition,
+      const wxSize& size = wxDefaultSize,
+      // Important:  default window name localizes!
+      const wxString& name = _("Directory Dialog"))
+   : wxTabTraversalWrapper<wxDirDialog>
+      { parent, message, defaultPath, style, pos, size, name }
+   {}
+
+   void Create(
+      wxWindow *parent,
+      const wxString& message = _("Select a directory"),
+      const wxString& defaultPath = wxT(""),
+      long style = wxDD_DEFAULT_STYLE,
+      const wxPoint& pos = wxDefaultPosition,
+      const wxSize& size = wxDefaultSize,
+      // Important:  default window name localizes!
+      const wxString& name = _("Directory Dialog"))
+   {
+      return wxTabTraversalWrapper<wxDirDialog>::Create(
+         parent, message, defaultPath, style, pos, size, name
+      );
+   }
+};
+
 #endif