Custom Manipulators Core Backend

This commit lands the core backend of the Custom Manipulators project onto the blender2.8 branch. It is a generic backend for managinig interactive on-screen controls that can be integrated into any 2D or 3D edito. It's also already integrated into the window-manager and editor code where needed.

NOTE: The changes here should not be visible for users at all. It's really just a back-end patch. Neither does this include any RNA or Python integration.

Of course, there's still lots of work ahead for custom manipulators, but this is a big milestone. WIP code that actually uses this backend can be found in the 'custom-manipulators' branch (previously called 'wiggly-widgets').

The work here isn't completely my own, all the initial work was done by @Antony Riakiotakis (psy-fi) and - although it has changed a lot since them - it's still the same in essence. He definitely deserves a big credit! Some changes in this patch were also done by @Campbell Barton (campbellbarton). Thank you guys!

Merge accepted by @brecht and @merwin.
Patch: https://developer.blender.org/D2232
Code documentation: https://wiki.blender.org/index.php/Dev:2.8/Source/Custom_Manipulator
Main task: https://developer.blender.org/T47343
More info: https://code.blender.org/2015/09/the-custom-manipulator-project-widget-project/

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/makesdna/DNA_screen_types.h b/source/blender/makesdna/DNA_screen_types.h
index e208ef39719..2efb9d1f1ac 100644
--- a/source/blender/makesdna/DNA_screen_types.h
+++ b/source/blender/makesdna/DNA_screen_types.h
@@ -265,9 +265,10 @@ typedef struct ARegion {
 	ListBase ui_previews;		/* uiPreview */
 	ListBase handlers;			/* wmEventHandler */
 	ListBase panels_category;	/* Panel categories runtime */
-	
+
+	struct wmManipulatorMap *manipulator_map; /* manipulator-map of this region */
 	struct wmTimer *regiontimer; /* blend in/out */
-	
+
 	char *headerstr;			/* use this string to draw info */
 	void *regiondata;			/* XXX 2.50, need spacedata equivalent? */
 } ARegion;