+extern void dcpomatic_setup_i18n ();
+extern wxString context_translation (wxString);
+extern std::string string_client_data (wxClientData* o);
+extern wxString time_to_timecode (dcpomatic::DCPTime t, double fps);
+extern void setup_audio_channels_choice (wxChoice* choice, int minimum);
+extern wxSplashScreen* maybe_show_splash ();
+extern double calculate_mark_interval (double start);
+extern bool display_progress (wxString title, wxString task);
+extern bool report_errors_from_last_job (wxWindow* parent);
+
+extern void checked_set (FilePickerCtrl* widget, boost::filesystem::path value);
+extern void checked_set (wxDirPickerCtrl* widget, boost::filesystem::path value);
+extern void checked_set (wxSpinCtrl* widget, int value);
+extern void checked_set (wxSpinCtrlDouble* widget, double value);
+extern void checked_set (wxChoice* widget, int value);
+extern void checked_set (wxChoice* widget, std::string value);
+extern void checked_set (wxChoice* widget, std::vector<std::pair<std::string, std::string> > items);
+extern void checked_set (wxTextCtrl* widget, std::string value);
+extern void checked_set (wxTextCtrl* widget, wxString value);
+extern void checked_set (PasswordEntry* widget, std::string value);
+extern void checked_set (wxCheckBox* widget, bool value);
+extern void checked_set (wxRadioButton* widget, bool value);
+extern void checked_set (wxStaticText* widget, std::string value);
+extern void checked_set (wxStaticText* widget, wxString value);
+
+extern int wx_get (wxChoice* widget);
+extern int wx_get (wxSpinCtrl* widget);
+extern double wx_get (wxSpinCtrlDouble* widget);
+
+/* GTK 2.24.17 has a buggy GtkFileChooserButton and it was put in Ubuntu 13.04.
+ This also seems to apply to 2.24.20 in Ubuntu 13.10 and 2.24.23 in Ubuntu 14.04.
+ Use our own dir picker as this is the least bad option I can think of.
+*/
+#if defined(__WXMSW__) || (GTK_MAJOR_VERSION == 2 && GTK_MINOR_VERSION == 24 && (GTK_MICRO_VERSION == 17 || GTK_MICRO_VERSION == 20 || GTK_MICRO_VERSION == 23))
+#define DCPOMATIC_USE_OWN_PICKER
+#endif
+
+#endif