options: fix 2 issues

1. Calling valueChanged didn't invoke machinery in
   value<t>, only base_value aka value_.

   There's a fast path in value<t>::type() despite the
   pessimization.

2. Split global scope stuff into options::globals from
   the options::globals stuff

3. Adjust usages

1 files changed, 29 insertions, 1 deletions

diff --git a/options/metatype.cpp b/options/metatype.cpp
index 0fa33933..e54970c0 100644
--- a/options/metatype.cpp
+++ b/options/metatype.cpp
@@ -1,3 +1,31 @@
-#include "defs.hpp"
+#include <QMetaType>
+
+namespace options::detail {
+
+template<typename t>
+int declare_metatype_for_type(const char* str)
+{
+    qRegisterMetaType<t>(str);
+    qRegisterMetaTypeStreamOperators<t>();
+
+    return -1;
+}
+
+} // ns options::detail
+
+#define OPENTRACK_DEFINE_METATYPE2(t, ctr)                                                          \
+    OPENTRACK_DEFINE_METATYPE3(t, ctr)
+
+#define OPENTRACK_DEFINE_METATYPE3(t, ctr)                                                          \
+    OPENTRACK_DEFINE_METATYPE4(t, init_metatype_ ## ctr)
+
+#define OPENTRACK_DEFINE_METATYPE4(t, sym)                                                          \
+    static class sym {                                                                              \
+        static const int dribble;                                                                   \
+    } sym ## _singleton;                                                                            \
+    const int sym :: dribble = ::options::detail::declare_metatype_for_type<t>(#t)
+
+#define OPENTRACK_DEFINE_METATYPE(t) OPENTRACK_DEFINE_METATYPE2(t, __COUNTER__)
+
 #define OPENTRACK_METATYPE_(x) OPENTRACK_DEFINE_METATYPE(x)
 #include "metatype.hpp"