Rebase wiggly-widgets branch onto blender2.8 branch

This commit adds a new 'custom-manipulators' branch in which changes of the wiggly-widgets branch are applied onto the blender2.8 branch. I've done it so I can start porting manipulator drawing code to use the new abstractions for OpenGL 3.2 core profile.
At some point I had to do it anyway - better earlier than later to reduce loss of git history.
From now on this is the main branch for the custom manipulators project, I'll delete the wiggly-widgets branch in a bit (but keep it available at https://github.com/julianeisel/blender/tree/wiggly-widgets). It's still possible to merge some manipulators for pre-2.8 by rewriting the drawing of those to use OpenGL <= 2.1 (or copy & pasting from earlier state).

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/windowmanager/wm_event_types.h b/source/blender/windowmanager/wm_event_types.h
index 3085f138846..9d34bc24e6c 100644
--- a/source/blender/windowmanager/wm_event_types.h
+++ b/source/blender/windowmanager/wm_event_types.h
@@ -339,6 +339,8 @@ enum {
 	EVT_DROP              = 0x5023,
 	EVT_BUT_CANCEL        = 0x5024,
 
+	/* could become manipulator callback */
+	EVT_MANIPULATOR_UPDATE     = 0x5025,
 	/* ********** End of Blender internal events. ********** */
 };