stubbed Notifier class and misc helper function

src/CMakeLists.txt

@@ -164,6 +164,7 @@ IF(wxWidgets_FOUND)
     add_library(slic3r_gui STATIC 
     ${GUI_LIBDIR}/MainFrame.cpp
     ${GUI_LIBDIR}/GUI.cpp
+    ${GUI_LIBDIR}/misc_ui.cpp
     )
     #only build GUI lib if building with wx
     target_link_libraries (slic3r slic3r_gui ${wxWidgets_LIBRARIES})

src/GUI/GUI.hpp

@@ -1,6 +1,7 @@
 #ifndef GUI_HPP
 #define GUI_HPP
 #include "MainFrame.hpp"
+#include "Notifier.hpp"
 
 namespace Slic3r { namespace GUI {
 

src/GUI/MainFrame.cpp

@@ -1,4 +1,5 @@
 #include "MainFrame.hpp"
+#include "misc_ui.hpp"
 #include <wx/accel.h>
 #include <wx/utils.h> 
 
@@ -137,7 +138,7 @@ void MainFrame::init_menubar()
         });
         append_menu_item(menuHelp, _("Check for &Updates..."), _("Check for new Slic3r versions"), [=](wxCommandEvent& e)
         {
-//            parent->check_version(true);
+            check_version(true);
         });
         append_menu_item(menuHelp, _("Slic3r &Manual"), _("Open the Slic3r manual in your browser"), [=](wxCommandEvent& e) 
         {

src/GUI/Notifier.hpp

@@ -0,0 +1,15 @@
+#ifndef NOTIFIER_HPP
+#define NOTIFIER_HPP
+
+namespace Slic3r { namespace GUI {
+
+/// Class to perform window manager notifications using Growl and/or DBus XWindow
+
+class Notifier { 
+public:
+    Notifier() { }
+};
+
+}} // Namespace Slic3r::GUI
+
+#endif // NOTIFIER_HPP

src/GUI/misc_ui.cpp

@@ -0,0 +1,15 @@
+#include "misc_ui.hpp"
+namespace Slic3r { namespace GUI {
+
+
+#ifdef SLIC3R_DEV
+void check_version(bool manual)  {
+}
+#else
+void check_version(bool manual)  {
+}
+
+#endif
+
+}} // namespace Slic3r::GUI
+

src/GUI/misc_ui.hpp

@@ -0,0 +1,15 @@
+#ifndef MISC_UI_HPP
+#define MISC_UI_HPP
+
+/// Common static (that is, free-standing) functions, not part of an object hierarchy.
+
+namespace Slic3r { namespace GUI {
+
+/// Performs a check via the Internet for a new version of Slic3r.
+/// If this version of Slic3r was compiled with SLIC3R_DEV, check the development 
+/// space instead of release.
+void check_version(bool manual = false);
+
+}} // namespace Slic3r::GUI
+
+#endif // MISC_UI_HPP