preparation for allowing to use wxTimer in wxBase (heavily modified patch 1113088):

1. Changed wxTimer to use wxTimerImpl
2. Added Unix-specific generic timer implementation
3. Added wxAppTraits::CreateTimerImpl()


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45544 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/utilsgtk.cpp

@@ -19,7 +19,7 @@
 #endif
 
 #include "wx/apptrait.h"
-
+#include "wx/gtk1/private/timer.h"
 #include "wx/process.h"
 
 #include "wx/unix/execute.h"
@@ -183,6 +183,11 @@ int wxAddProcessCallback(wxEndProcessData *proc_data, int fd)
     return tag;
 }
 
+wxTimerImpl* wxGUIAppTraits::CreateTimerImpl(wxTimer *timer)
+{
+    return new wxGTKTimerImpl(timer);
+}
+
 // ----------------------------------------------------------------------------
 // wxPlatformInfo-related
 // ----------------------------------------------------------------------------