Many changes for wxInputHandler creation mainly related to:

1. Allow the theme to create only the input handlers it customizes instead
   of forcing it to always create a handler even if the standard one is used:
   wxTheme::GetInputHandler() now takes wxInputConsumer to make this possible

2. Prefer delegation to inheritance when creating customized input handlers,
   almost all (except for wxStdScrollbarInputHandler) standard handler classes
   are now private, use wxClassName::GetStdInputHandler() to retrieve the
   standard handler for any class or polymorphic DoGetStdInputHandler()


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41227 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/univ/spinbutt.cpp

@@ -355,6 +355,14 @@ bool wxSpinButton::PerformAction(const wxControlAction& action,
     return true;
 }
 
+/* static */
+wxInputHandler *wxSpinButton::GetStdInputHandler(wxInputHandler *handlerDef)
+{
+    static wxStdSpinButtonInputHandler s_handler(handlerDef);
+
+    return &s_handler;
+}
+
 // ----------------------------------------------------------------------------
 // wxStdSpinButtonInputHandler
 // ----------------------------------------------------------------------------