2.5

New: Custom region draw callbacks.

For Martin: an example is now in space_view3d/view3d_edit.c
On middlemouse rotate view, it draws a small square in center.

It works likes this:

#include "ED_space_api.h"

handle= ED_region_draw_cb_activate(region->type, drawfunc, type)

and to stop it:

ED_region_draw_cb_exit(region->type, handle)

drawfunc is of type (const bContext *C, ARegion *ar)
currently it gets called only as type REGION_DRAW_POST, later we
can add more (PRE, POST_XRAY, POST_2D, etc).

For correct usage, these calls should return leaving view transform
unaltered.

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_space_api.h b/source/blender/editors/include/ED_space_api.h
index b705c050aa3..20b1e2b5499 100644
--- a/source/blender/editors/include/ED_space_api.h
+++ b/source/blender/editors/include/ED_space_api.h
@@ -29,6 +29,9 @@
 #ifndef ED_SPACE_API_H
 #define ED_SPACE_API_H
 
+struct ARegionType;
+struct bContext;
+
 /* the pluginnable API for export to editors */
 
 /* calls for registering default spaces */
@@ -54,5 +57,14 @@ void ED_spacetype_sequencer(void);
 void ED_file_init(void);
 void ED_file_exit(void);
 
+#define REGION_DRAW_PRE		1
+#define REGION_DRAW_POST	0
+
+void *ED_region_draw_cb_activate(struct ARegionType *, 
+								 void	(*draw)(const struct bContext *, struct ARegion *),
+								 int type);
+void ED_region_draw_cb_draw(const struct bContext *, struct ARegion *, int);
+void ED_region_draw_cb_exit(struct ARegionType *, void *);
+
 #endif /* ED_SPACE_API_H */