VSE: Change grid line drawing

Add overlay option to disable grid drawing.
Reuse drawing code from other editors (timeline editor)
Add argument `display_minor_lines` to function
`UI_view2d_draw_lines_x__discrete_frames_or_seconds`
This way minor line drawing can be disabled and so it doesn't cause
too much visual noise. Also spacing seems to be too fine, so VSE uses 3x
what is defined in preferences.

Reviewed By: fsiddi, Severin

Differential Revision: https://developer.blender.org/D11790

1 files changed, 6 insertions, 4 deletions

diff --git a/source/blender/editors/include/UI_view2d.h b/source/blender/editors/include/UI_view2d.h
index 8191a9a9062..4ee7df89487 100644
--- a/source/blender/editors/include/UI_view2d.h
+++ b/source/blender/editors/include/UI_view2d.h
@@ -143,17 +143,19 @@ void UI_view2d_view_orthoSpecial(struct ARegion *region, struct View2D *v2d, con
 void UI_view2d_view_restore(const struct bContext *C);
 
 /* grid drawing */
-void UI_view2d_constant_grid_draw(const struct View2D *v2d, float step);
 void UI_view2d_multi_grid_draw(
     const struct View2D *v2d, int colorid, float step, int level_size, int totlevels);
 
 void UI_view2d_draw_lines_y__values(const struct View2D *v2d);
 void UI_view2d_draw_lines_x__values(const struct View2D *v2d);
-void UI_view2d_draw_lines_x__discrete_values(const struct View2D *v2d);
-void UI_view2d_draw_lines_x__discrete_time(const struct View2D *v2d, const struct Scene *scene);
+void UI_view2d_draw_lines_x__discrete_values(const struct View2D *v2d, bool display_minor_lines);
+void UI_view2d_draw_lines_x__discrete_time(const struct View2D *v2d,
+                                           const struct Scene *scene,
+                                           bool display_minor_lines);
 void UI_view2d_draw_lines_x__discrete_frames_or_seconds(const struct View2D *v2d,
                                                         const struct Scene *scene,
-                                                        bool display_seconds);
+                                                        bool display_seconds,
+                                                        bool display_minor_lines);
 void UI_view2d_draw_lines_x__frames_or_seconds(const struct View2D *v2d,
                                                const struct Scene *scene,
                                                bool display_seconds);