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feat(tracker, gioui): add visual indicators to show which instruments are playing

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Closes #44
This commit is contained in:
vsariola
2021-04-11 17:51:34 +03:00
parent 1eca428801
commit b4705c941f
2 changed files with 46 additions and 13 deletions
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21
tracker/gioui/instruments.go
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@ -3,6 +3,8 @@ package gioui
import (
"fmt"
"image"
"image/color"
"math"
"strconv"
"time"
@ -129,6 +131,21 @@ func (t *Tracker) layoutInstrumentNames(gtx C) D {
grabhandle.Text = ":::"
}
label := func(gtx C) D {
c := 0.0
voice := t.Song().Patch.FirstVoiceForInstrument(i)
for j := 0; j < t.Song().Patch[i].NumVoices; j++ {
released, event := t.player.VoiceState(voice)
vc := math.Exp(-float64(event)/15000) * .5
if !released {
vc += .5
}
if c < vc {
c = vc
}
voice++
}
k := byte(255 - c*127)
color := color.NRGBA{R: 255, G: k, B: 255, A: 255}
if i == t.InstrIndex() {
for _, ev := range t.InstrumentNameEditor.Events() {
_, ok := ev.(widget.SubmitEvent)
@ -141,7 +158,7 @@ func (t *Tracker) layoutInstrumentNames(gtx C) D {
t.InstrumentNameEditor.SetText(n)
}
editor := material.Editor(t.Theme, t.InstrumentNameEditor, "Instr")
editor.Color = instrumentNameColor
editor.Color = color
editor.HintColor = instrumentNameHintColor
editor.TextSize = unit.Dp(12)
dims := layout.Center.Layout(gtx, editor.Layout)
@ -152,7 +169,7 @@ func (t *Tracker) layoutInstrumentNames(gtx C) D {
if text == "" {
text = "Instr"
}
labelStyle := LabelStyle{Text: text, ShadeColor: black, Color: white, FontSize: unit.Sp(12)}
labelStyle := LabelStyle{Text: text, ShadeColor: black, Color: color, FontSize: unit.Sp(12)}
return layout.Center.Layout(gtx, labelStyle.Layout)
}
return layout.Inset{Left: unit.Dp(6), Right: unit.Dp(6)}.Layout(gtx, func(gtx C) D {