From 12e1bde2a21e17cf873241801f535ef08c8546b9 Mon Sep 17 00:00:00 2001
From: vsariola <vsariola@users.noreply.github.com>
Date: Wed, 6 Jan 2021 15:14:48 +0200
Subject: [PATCH] feat(tracker): show notes for whole song, instead of single
 pattern

---
 tracker/layout.go | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/tracker/layout.go b/tracker/layout.go
index 845af40..a2737f9 100644
--- a/tracker/layout.go
+++ b/tracker/layout.go
@@ -26,13 +26,26 @@ func (t *Tracker) layoutTracker(gtx layout.Context) layout.Dimensions {
 	if t.DisplayPattern != t.PlayPattern {
 		playRow = -1
 	}
+
 	for i, trk := range t.song.Tracks {
+		sumLen := 0
+		for _, patIndex := range trk.Sequence {
+			sumLen += len(trk.Patterns[patIndex])
+		}
+		notes := make([]byte, sumLen)
+		window := notes
+		for _, patIndex := range trk.Sequence {
+			elementsCopied := copy(window, trk.Patterns[patIndex])
+			window = window[elementsCopied:]
+		}
+		songCursorRow := t.CursorRow + t.DisplayPattern*t.song.PatternRows()
+		songPlayRow := playRow + t.PlayPattern*t.song.PatternRows()
 		flexTracks[i] = layout.Rigid(Lowered(t.layoutTrack(
-			trk.Patterns[trk.Sequence[t.DisplayPattern]],
+			notes,
 			t.ActiveTrack == i,
-			t.CursorRow,
+			songCursorRow,
 			t.CursorColumn,
-			playRow,
+			songPlayRow,
 		)))
 	}
 	return layout.Flex{Axis: layout.Horizontal}.Layout(gtx,