Markers: Make marker lines in sequencer and graph editor optional

- Makes it possible to show a vertical line for every marker in the graph editor.
- Makes the marker line visiblity optional in the sequencer and graph editor.

Request from @hjalti.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D4348

2 files changed, 6 insertions, 2 deletions

diff --git a/source/blender/editors/space_sequencer/sequencer_draw.c b/source/blender/editors/space_sequencer/sequencer_draw.c
index 5f0195effbe..089a30bcf5e 100644
--- a/source/blender/editors/space_sequencer/sequencer_draw.c
+++ b/source/blender/editors/space_sequencer/sequencer_draw.c
@@ -1724,7 +1724,11 @@ void draw_timeline_seq(const bContext *C, ARegion *ar)
 
 	/* markers */
 	UI_view2d_view_orthoSpecial(ar, v2d, 1);
-	ED_markers_draw(C, DRAW_MARKERS_LINES | DRAW_MARKERS_MARGIN);
+	int marker_draw_flag = DRAW_MARKERS_MARGIN;
+	if (sseq->flag & SEQ_SHOW_MARKER_LINES) {
+		marker_draw_flag |= DRAW_MARKERS_LINES;
+	}
+	ED_markers_draw(C, marker_draw_flag);
 
 	/* preview range */
 	UI_view2d_view_ortho(v2d);
diff --git a/source/blender/editors/space_sequencer/space_sequencer.c b/source/blender/editors/space_sequencer/space_sequencer.c
index fbd18543991..e1a917b4e38 100644
--- a/source/blender/editors/space_sequencer/space_sequencer.c
+++ b/source/blender/editors/space_sequencer/space_sequencer.c
@@ -116,7 +116,7 @@ static SpaceLink *sequencer_new(const ScrArea *UNUSED(sa), const Scene *scene)
 	sseq->chanshown = 0;
 	sseq->view = SEQ_VIEW_SEQUENCE;
 	sseq->mainb = SEQ_DRAW_IMG_IMBUF;
-	sseq->flag = SEQ_SHOW_GPENCIL | SEQ_USE_ALPHA;
+	sseq->flag = SEQ_SHOW_GPENCIL | SEQ_USE_ALPHA | SEQ_SHOW_MARKER_LINES;
 
 	/* header */
 	ar = MEM_callocN(sizeof(ARegion), "header for sequencer");