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feat(tracker): plot envelope shape in scope when envelope selected

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This commit is contained in:
5684185+vsariola@users.noreply.github.com
2026-01-31 20:51:49 +02:00
parent 287bd036a6
commit 6e8acc8f9b
3 changed files with 79 additions and 1 deletions
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14
tracker/gioui/oscilloscope.go
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@ -58,12 +58,19 @@ func (s *Oscilloscope) Layout(gtx C) D {
w := t.Scope().Waveform()
cx := float32(w.Cursor) / float32(len(w.Buffer))
env, envOk := t.Scope().Envelope()
data := func(chn int, xr plotRange) (yr plotRange, ok bool) {
x1 := max(int(xr.a*float32(len(w.Buffer))), 0)
x2 := min(int(xr.b*float32(len(w.Buffer))), len(w.Buffer)-1)
if x1 > x2 {
return plotRange{}, false
}
if chn == 2 && envOk {
y1 := env.Value(x1)
y2 := env.Value(x2)
return plotRange{-max(y1, y2), -min(y1, y2)}, true
}
step := max((x2-x1)/1000, 1) // if the range is too large, sample only ~ 1000 points
y1 := float32(math.Inf(-1))
y2 := float32(math.Inf(+1))
@ -101,7 +108,12 @@ func (s *Oscilloscope) Layout(gtx C) D {
yield(1, "")
}
return s.State.plot.Layout(gtx, data, xticks, yticks, cx, 2)
numChannels := 2
if envOk {
numChannels = 3
}
return s.State.plot.Layout(gtx, data, xticks, yticks, cx, numChannels)
}),
layout.Rigid(func(gtx C) D {
return layout.Flex{Axis: layout.Horizontal, Alignment: layout.Middle}.Layout(gtx,