Drivers Editing: Added "Copy/Paste" buttons beside "Add Variable" for copying all variables from one driver to another

This was a feature request from a few years back (IIRC from ZanQdo?) to make it
easier to reuse one set of driver variables across several different drivers.

Dev Notes:
* Finally it's done! All that trouble for two little buttons.
* Grr... cmake... grrr!

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_keyframing.h b/source/blender/editors/include/ED_keyframing.h
index 9a411975880..81e2558e765 100644
--- a/source/blender/editors/include/ED_keyframing.h
+++ b/source/blender/editors/include/ED_keyframing.h
@@ -291,6 +291,9 @@ bool ANIM_remove_driver(struct ReportList *reports, struct ID *id, const char rn
 /* Clear copy-paste buffer for drivers */
 void ANIM_drivers_copybuf_free(void);
 
+/* Clear copy-paste buffer for driver variable sets */
+void ANIM_driver_vars_copybuf_free(void);
+
 /* -------- */
 
 /* Returns whether there is a driver in the copy/paste buffer to paste */
@@ -307,6 +310,17 @@ bool ANIM_copy_driver(struct ReportList *reports, struct ID *id, const char rna_
  */
 bool ANIM_paste_driver(struct ReportList *reports, struct ID *id, const char rna_path[], int array_index, short flag);
 
+/* -------- */
+
+/* Checks if there are driver variables in the copy/paste buffer */
+bool ANIM_driver_vars_can_paste(void);
+
+/* Copy the given driver's variables to the buffer */
+bool ANIM_driver_vars_copy(struct ReportList *reports, struct FCurve *fcu);
+
+/* Paste the variables in the buffer to the given FCurve */
+bool ANIM_driver_vars_paste(struct ReportList *reports, struct FCurve *fcu, bool replace);
+
 /* ************ Auto-Keyframing ********************** */
 /* Notes:
  * - All the defines for this (User-Pref settings and Per-Scene settings)