feat(sointu, tracker,...): restructure domain & tracker models

send targets are now by ID and Song has "Score" part, which is the notes for it. also, moved the model part separate of the actual gioui dependend stuff.

sorry to my future self about the code bomb; ended up too far and did not find an easy way to rewrite the history to make the steps smaller, so in the end, just squashed everything.

tracker/alert.go

@@ -1,116 +0,0 @@
-package tracker
-
-import (
-	"image/color"
-	"time"
-
-	"gioui.org/f32"
-	"gioui.org/layout"
-	"gioui.org/op"
-	"gioui.org/op/clip"
-	"gioui.org/op/paint"
-	"gioui.org/unit"
-)
-
-type Alert struct {
-	message       string
-	alertType     AlertType
-	duration      time.Duration
-	showMessage   string
-	showAlertType AlertType
-	showDuration  time.Duration
-	showTime      time.Time
-	pos           float64
-	lastUpdate    time.Time
-}
-
-type AlertType int
-
-const (
-	None AlertType = iota
-	Notify
-	Warning
-	Error
-)
-
-var alertSpeed = 150 * time.Millisecond
-var alertMargin = layout.UniformInset(unit.Dp(6))
-var alertInset = layout.UniformInset(unit.Dp(6))
-
-func (a *Alert) Update(message string, alertType AlertType, duration time.Duration) {
-	if a.alertType < alertType {
-		a.message = message
-		a.alertType = alertType
-		a.duration = duration
-	}
-}
-
-func (a *Alert) Layout(gtx C) D {
-	now := time.Now()
-	if a.alertType != None {
-		a.showMessage = a.message
-		a.showAlertType = a.alertType
-		a.showTime = now
-		a.showDuration = a.duration
-	}
-	a.alertType = None
-	var targetPos float64 = 0.0
-	if now.Sub(a.showTime) <= a.showDuration {
-		targetPos = 1.0
-	}
-	delta := float64(now.Sub(a.lastUpdate)) / float64(alertSpeed)
-	if a.pos < targetPos {
-		a.pos += delta
-		if a.pos > targetPos {
-			a.pos = targetPos
-		} else {
-			op.InvalidateOp{At: now.Add(50 * time.Millisecond)}.Add(gtx.Ops)
-		}
-	} else if a.pos > targetPos {
-		a.pos -= delta
-		if a.pos < targetPos {
-			a.pos = targetPos
-		} else {
-			op.InvalidateOp{At: now.Add(50 * time.Millisecond)}.Add(gtx.Ops)
-		}
-	}
-	a.lastUpdate = now
-	var color, textColor, shadeColor color.NRGBA
-	switch a.showAlertType {
-	case Warning:
-		color = warningColor
-		textColor = black
-	case Error:
-		color = errorColor
-		textColor = black
-	default:
-		color = popupSurfaceColor
-		textColor = white
-		shadeColor = black
-	}
-	bgWidget := func(gtx C) D {
-		paint.FillShape(gtx.Ops, color, clip.Rect{
-			Max: gtx.Constraints.Min,
-		}.Op())
-		return D{Size: gtx.Constraints.Min}
-	}
-	labelStyle := LabelStyle{Text: a.showMessage, Color: textColor, ShadeColor: shadeColor, Font: labelDefaultFont, Alignment: layout.Center, FontSize: unit.Dp(16)}
-	return alertMargin.Layout(gtx, func(gtx C) D {
-		return layout.S.Layout(gtx, func(gtx C) D {
-			defer op.Save(gtx.Ops).Load()
-			gtx.Constraints.Min.X = gtx.Constraints.Max.X
-			recording := op.Record(gtx.Ops)
-			dims := layout.Stack{Alignment: layout.Center}.Layout(gtx,
-				layout.Expanded(bgWidget),
-				layout.Stacked(func(gtx C) D {
-					return alertInset.Layout(gtx, labelStyle.Layout)
-				}),
-			)
-			macro := recording.Stop()
-			totalY := dims.Size.Y + gtx.Px(alertMargin.Bottom)
-			op.Offset(f32.Pt(0, float32((1-a.pos)*float64(totalY)))).Add((gtx.Ops))
-			macro.Add(gtx.Ops)
-			return dims
-		})
-	})
-}