feat: input midi velocity into a separate track (includes many structural changes)

tracker/optional_int.go

@@ -1,5 +1,7 @@
 package tracker
 
+import "github.com/vsariola/sointu/tracker/types"
+
 type (
 	// OptionalInt tries to follow the same convention as e.g. Int{...} or Bool{...}
 	// Do not confuse with types.OptionalInteger, which you might use as a model,
@@ -40,3 +42,40 @@ func (v OptionalInt) Equals(value int, present bool) bool {
 	oldValue, oldPresent := v.Unpack()
 	return value == oldValue && present == oldPresent
 }
+
+// Model methods
+
+func (m *Model) TrackForMidiVelIn() *TrackMidiVelIn { return (*TrackMidiVelIn)(m) }
+
+// TrackForMidiVelIn - to record Velocity in the track with given number (-1 = off)
+
+func (m *TrackMidiVelIn) OptionalInt() OptionalInt { return OptionalInt{m} }
+func (m *TrackMidiVelIn) Range() intRange          { return intRange{0, len(m.d.Song.Score.Tracks) - 1} }
+func (m *TrackMidiVelIn) change(string) func()     { return func() {} }
+
+func (m *TrackMidiVelIn) setValue(val int) {
+	m.trackForMidiVelIn = types.NewOptionalInteger(val, val >= 0)
+}
+
+func (m *TrackMidiVelIn) unsetValue() {
+	m.trackForMidiVelIn = types.NewEmptyOptionalInteger()
+}
+
+func (m *TrackMidiVelIn) Unpack() (int, bool) {
+	return m.trackForMidiVelIn.Unpack()
+}
+
+func (m *TrackMidiVelIn) Value() int {
+	return m.trackForMidiVelIn.Value()
+}
+
+func (m *TrackMidiVelIn) IsValid() bool {
+	if m.trackForMidiVelIn.Empty() {
+		return true
+	}
+	return (*Model)(m).CanUseTrackForMidiVelInput(m.trackForMidiVelIn.Value())
+}
+
+func (m *TrackMidiVelIn) Equals(value int) bool {
+	return m.trackForMidiVelIn.Equals(value)
+}