feat(tracker): make instrument name editable

tracker/instruments.go

@@ -1,14 +1,16 @@
 package tracker
 
 import (
-	"fmt"
 	"image"
 
+	"gioui.org/io/pointer"
 	"gioui.org/layout"
 	"gioui.org/op"
 	"gioui.org/op/clip"
 	"gioui.org/op/paint"
+	"gioui.org/text"
 	"gioui.org/unit"
+	"gioui.org/widget"
 	"gioui.org/widget/material"
 	"golang.org/x/exp/shiny/materialdesign/icons"
 )
@@ -63,7 +65,8 @@ func (t *Tracker) layoutInstrumentHeader(gtx C) D {
 		} else {
 			deleteInstrumentBtnStyle.Color = disabledTextColor
 		}
-		return layout.Flex{Axis: layout.Horizontal}.Layout(gtx,
+
+		return layout.Flex{Axis: layout.Horizontal, Alignment: layout.Middle}.Layout(gtx,
 			layout.Rigid(Label("Voices: ", white)),
 			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
 				maxRemain := 32 - t.song.Patch.TotalVoices() + t.song.Patch.Instruments[t.CurrentInstrument].NumVoices
@@ -90,16 +93,45 @@ func (t *Tracker) layoutInstrumentHeader(gtx C) D {
 }
 
 func (t *Tracker) layoutInstrumentNames(gtx C) D {
-
 	element := func(gtx C, i int) D {
 		gtx.Constraints.Min.Y = gtx.Px(unit.Dp(36))
+		gtx.Constraints.Min.X = gtx.Px(unit.Dp(30))
+		grabhandle := LabelStyle{Text: "", ShadeColor: black, Color: white, FontSize: unit.Sp(10), Alignment: layout.Center}
+		if i == t.CurrentInstrument {
+			grabhandle.Text = ":::"
+		}
+		label := func(gtx C) D {
+			if i == t.CurrentInstrument {
+				for _, ev := range t.InstrumentNameEditor.Events() {
+					_, ok := ev.(widget.SubmitEvent)
+					if ok {
+						t.InstrumentNameEditor = &widget.Editor{SingleLine: true, Submit: true, Alignment: text.Middle} // TODO: is there any other way to defocus the editor
+						break
+					}
+				}
+				if n := t.song.Patch.Instruments[t.CurrentInstrument].Name; n != t.InstrumentNameEditor.Text() {
+					t.InstrumentNameEditor.SetText(n)
+				}
+				editor := material.Editor(t.Theme, t.InstrumentNameEditor, "Instr")
+				editor.Color = instrumentNameColor
+				editor.HintColor = instrumentNameHintColor
+				editor.TextSize = unit.Dp(12)
+				dims := layout.Center.Layout(gtx, editor.Layout)
+				t.SetInstrumentName(t.InstrumentNameEditor.Text())
+				return dims
+			}
 			text := t.song.Patch.Instruments[i].Name
 			if text == "" {
-			text = fmt.Sprintf("%v", i)
+				text = "Instr"
 			}
-		labelStyle := LabelStyle{Text: text, ShadeColor: black, Color: white, Font: labelDefaultFont, FontSize: unit.Sp(12)}
+			labelStyle := LabelStyle{Text: text, ShadeColor: black, Color: white, FontSize: unit.Sp(12)}
-		return layout.Inset{Left: unit.Dp(10), Right: unit.Dp(10)}.Layout(gtx, func(gtx C) D {
 			return layout.Center.Layout(gtx, labelStyle.Layout)
+		}
+		return layout.Inset{Left: unit.Dp(6), Right: unit.Dp(6)}.Layout(gtx, func(gtx C) D {
+			return layout.Flex{Axis: layout.Vertical, Alignment: layout.Middle}.Layout(gtx,
+				layout.Rigid(grabhandle.Layout),
+				layout.Rigid(label),
+			)
 		})
 	}
 
@@ -109,6 +141,8 @@ func (t *Tracker) layoutInstrumentNames(gtx C) D {
 	instrumentList.SurfaceColor = transparent
 
 	t.InstrumentDragList.SelectedItem = t.CurrentInstrument
+	defer op.Save(gtx.Ops).Load()
+	pointer.PassOp{Pass: true}.Add(gtx.Ops)
 	dims := instrumentList.Layout(gtx)
 	if t.CurrentInstrument != t.InstrumentDragList.SelectedItem {
 		t.CurrentInstrument = t.InstrumentDragList.SelectedItem

tracker/keyevent.go

@@ -45,6 +45,9 @@ var noteMap = map[string]int{
 // KeyEvent handles incoming key events and returns true if repaint is needed.
 func (t *Tracker) KeyEvent(e key.Event) bool {
 	if e.State == key.Press {
+		if t.InstrumentNameEditor.Focused() {
+			return false
+		}
 		switch e.Name {
 		case "Z":
 			if e.Modifiers.Contain(key.ModCtrl) {

tracker/theme.go

@@ -87,6 +87,8 @@ var inactiveBtnColor = color.NRGBA{R: 61, G: 55, B: 55, A: 255}
 
 var instrumentSurfaceColor = color.NRGBA{R: 45, G: 45, B: 45, A: 255}
 var instrumentHoverColor = color.NRGBA{R: 30, G: 31, B: 38, A: 255}
+var instrumentNameColor = color.NRGBA{R: 255, G: 255, B: 255, A: 255}
+var instrumentNameHintColor = color.NRGBA{R: 200, G: 200, B: 200, A: 255}
 
 var songSurfaceColor = color.NRGBA{R: 37, G: 37, B: 38, A: 255}
 

tracker/tracker.go

@@ -2,10 +2,12 @@ package tracker
 
 import (
 	"fmt"
+	"strings"
 	"sync"
 
 	"gioui.org/font/gofont"
 	"gioui.org/layout"
+	"gioui.org/text"
 	"gioui.org/widget"
 	"gioui.org/widget/material"
 	"github.com/vsariola/sointu"
@@ -34,6 +36,7 @@ type Tracker struct {
 	RowsPerPattern        *NumberInput
 	RowsPerBeat           *NumberInput
 	InstrumentVoices      *NumberInput
+	InstrumentNameEditor  *widget.Editor
 	NewTrackBtn           *widget.Clickable
 	NewInstrumentBtn      *widget.Clickable
 	DeleteInstrumentBtn   *widget.Clickable
@@ -164,6 +167,14 @@ func (t *Tracker) SetInstrumentVoices(value int) bool {
 	return false
 }
 
+func (t *Tracker) SetInstrumentName(name string) {
+	name = strings.TrimSpace(name)
+	if name != t.song.Patch.Instruments[t.CurrentInstrument].Name {
+		t.SaveUndo()
+		t.song.Patch.Instruments[t.CurrentInstrument].Name = name
+	}
+}
+
 func (t *Tracker) SetBPM(value int) bool {
 	if value < 1 {
 		value = 1
@@ -442,6 +453,7 @@ func New(audioContext sointu.AudioContext, synthService sointu.SynthService) *Tr
 		RowsPerPattern:        new(NumberInput),
 		RowsPerBeat:           new(NumberInput),
 		InstrumentVoices:      new(NumberInput),
+		InstrumentNameEditor:  &widget.Editor{SingleLine: true, Submit: true, Alignment: text.Middle},
 		NewTrackBtn:           new(widget.Clickable),
 		NewInstrumentBtn:      new(widget.Clickable),
 		DeleteInstrumentBtn:   new(widget.Clickable),