UI: Add Free Handle Types to CurveProfile Widget

Under the hood the CurveProfile widget (used for bevel custom profiles)
uses a bezier curve, but right now though it only supports two of the
bezier curve handle types, vector and auto. This patch adds support for
free handles and adds all of the logic for editing them.

This is the first step to the ability to import and export curve objects
in the widget.

There's some code cleanup in curveprofile.c. Movement for handles and
control points is abstracted to functions there rather than happening
in interface_handlers.c.

An "Apply Preset" button is also added, which solves a confusing issue
where you apply a preset, then change the number of samples and the
preset doesn't change. The button makes it clear that the preset needs
to be reapplied.

Reviewed By: Severin

Differential Revision: https://developer.blender.org/D6470

1 files changed, 16 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_curveprofile.h b/source/blender/blenkernel/BKE_curveprofile.h
index bf50cde1efc..877ab887138 100644
--- a/source/blender/blenkernel/BKE_curveprofile.h
+++ b/source/blender/blenkernel/BKE_curveprofile.h
@@ -45,6 +45,16 @@ void BKE_curveprofile_copy_data(struct CurveProfile *target, const struct CurveP
 
 struct CurveProfile *BKE_curveprofile_copy(const struct CurveProfile *profile);
 
+bool BKE_curveprofile_move_handle(struct CurveProfilePoint *point,
+                                  const bool handle_1,
+                                  const bool snap,
+                                  const float delta[2]);
+
+bool BKE_curveprofile_move_point(struct CurveProfile *profile,
+                                 struct CurveProfilePoint *point,
+                                 const bool snap,
+                                 const float delta[2]);
+
 bool BKE_curveprofile_remove_point(struct CurveProfile *profile, struct CurveProfilePoint *point);
 
 void BKE_curveprofile_remove_by_flag(struct CurveProfile *profile, const short flag);
@@ -65,7 +75,12 @@ void BKE_curveprofile_create_samples(struct CurveProfile *profile,
 void BKE_curveprofile_initialize(struct CurveProfile *profile, short segments_len);
 
 /* Called for a complete update of the widget after modifications */
-void BKE_curveprofile_update(struct CurveProfile *profile, const bool rem_doubles);
+enum {
+  PROF_UPDATE_NONE = 0,
+  PROF_UPDATE_REMOVE_DOUBLES = (1 << 0),
+  PROF_UPDATE_CLIP = (1 << 1),
+};
+void BKE_curveprofile_update(struct CurveProfile *profile, const int update_flags);
 
 /* Need to find the total length of the curve to sample a portion of it */
 float BKE_curveprofile_total_length(const struct CurveProfile *profile);