fix(tracker): click on hex track low/high nibble selects that nibble

Closes #160

CHANGELOG.md

@@ -24,6 +24,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   the command line tools.
 
 ### Fixed
+- Clicking on low nibble or high nibble of a hex track selects that nibble
+  ([#160][i160])
 - If units have useless parameters in their parameter maps, from bugs or from a
   malformed yaml file, they are removed and user is warned about it
 - Pressing a or 1 when editing note values in hex mode created a note off line
@@ -257,5 +259,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 [i151]: https://github.com/vsariola/sointu/issues/151
 [i154]: https://github.com/vsariola/sointu/issues/154
 [i158]: https://github.com/vsariola/sointu/issues/158
+[i160]: https://github.com/vsariola/sointu/issues/160
 [i162]: https://github.com/vsariola/sointu/issues/162
 [i166]: https://github.com/vsariola/sointu/issues/166

tracker/gioui/scroll_table.go

@@ -146,13 +146,11 @@ func (s *ScrollTableStyle) handleEvents(gtx layout.Context, p image.Point) {
 			if e.Kind == pointer.Press {
 				gtx.Execute(key.FocusCmd{Tag: s.ScrollTable})
 			}
-			dx := (int(e.Position.X) + s.ScrollTable.ColTitleList.List.Position.Offset) / gtx.Dp(s.CellWidth)
-			dy := (int(e.Position.Y) + s.ScrollTable.RowTitleList.List.Position.Offset) / gtx.Dp(s.CellHeight)
-			x := dx + s.ScrollTable.ColTitleList.List.Position.First
-			y := dy + s.ScrollTable.RowTitleList.List.Position.First
-			s.ScrollTable.Table.SetCursor(
-				tracker.Point{X: x, Y: y},
-			)
+			dx := (e.Position.X + float32(s.ScrollTable.ColTitleList.List.Position.Offset)) / float32(gtx.Dp(s.CellWidth))
+			dy := (e.Position.Y + float32(s.ScrollTable.RowTitleList.List.Position.Offset)) / float32(gtx.Dp(s.CellHeight))
+			x := dx + float32(s.ScrollTable.ColTitleList.List.Position.First)
+			y := dy + float32(s.ScrollTable.RowTitleList.List.Position.First)
+			s.ScrollTable.Table.SetCursorFloat(x, y)
 			if !e.Modifiers.Contain(key.ModShift) {
 				s.ScrollTable.Table.SetCursor2(s.ScrollTable.Table.Cursor())
 			}

tracker/table.go

@@ -1,6 +1,8 @@
 package tracker
 
 import (
+	"math"
+
 	"github.com/vsariola/sointu"
 	"gopkg.in/yaml.v3"
 )
@@ -15,6 +17,7 @@ type (
 		Cursor2() Point
 		SetCursor(Point)
 		SetCursor2(Point)
+		SetCursorFloat(x, y float32)
 		Width() int
 		Height() int
 		MoveCursor(dx, dy int) (ok bool)
@@ -178,6 +181,10 @@ func (m *Order) SetCursor2(p Point) {
 	m.updateCursorRows()
 }
 
+func (m *Order) SetCursorFloat(x, y float32) {
+	m.SetCursor(Point{int(x), int(y)})
+}
+
 func (v *Order) updateCursorRows() {
 	if v.Cursor() == v.Cursor2() {
 		v.d.Cursor.PatternRow = 0
@@ -422,6 +429,11 @@ func (v *Notes) SetCursor2(p Point) {
 	v.d.Cursor2.SongPos = v.d.Song.Score.Clamp(sointu.SongPos{PatternRow: p.Y})
 }
 
+func (m *Notes) SetCursorFloat(x, y float32) {
+	m.SetCursor(Point{int(x), int(y)})
+	m.d.LowNibble = math.Mod(float64(x), 1.0) > 0.5
+}
+
 func (v *Notes) Width() int {
 	return len((*Model)(v).d.Song.Score.Tracks)
 }