Change region drawing callbacks to work much closer to how blender manages them internally.

- yes, this does break scripts, but the api is marked experimental.


ED_region_draw_cb_activate() adds a callback to a region type whereas the api made it look like the callback was being added to the region instance.
Use a class method on bpy.types.Space to manage region drawing, eg.

was:
  self._handle = context.region.callback_add(draw_callback_px, args, 'POST_PIXEL')

is now:
  self._handle = bpy.types.SpaceView3D.draw_handler_add(draw_callback_px, args, 'WINDOW', 'POST_PIXEL')

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/python/intern/bpy_rna.h b/source/blender/python/intern/bpy_rna.h
index 880ef4c2185..edd2ada0539 100644
--- a/source/blender/python/intern/bpy_rna.h
+++ b/source/blender/python/intern/bpy_rna.h
@@ -171,6 +171,7 @@ PyObject *BPY_rna_module(void);
 void	  BPY_update_rna_module(void);
 /*PyObject *BPY_rna_doc(void);*/
 PyObject *BPY_rna_types(void);
+void      BPY_rna_register_cb(void);
 
 PyObject *pyrna_struct_CreatePyObject(PointerRNA *ptr);
 PyObject *pyrna_prop_CreatePyObject(PointerRNA *ptr, PropertyRNA *prop);