82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
package mujica
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import (
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"log/slog"
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"math"
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"strconv"
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"time"
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"github.com/egoist/mygo/ui"
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"mujicaui/icons"
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"mujicaui/theme"
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)
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// BlinkHighlightOptions configure a BlinkHighlight.
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type BlinkHighlightOptions struct {
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// Format writes the value; nil uses two decimals.
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Format func(v float64) string
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// Duration of the fade; zero means 800 ms.
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Duration time.Duration
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}
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type blinkState struct {
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value float64
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dir int
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at time.Time
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set bool
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}
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// BlinkHighlight shows value and tints it once when it changes, up in Success, down in Danger.
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// An arrow marks the last direction, and stays as the only mark under reduced motion.
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func BlinkHighlight(c *ui.Context, value float64, opts BlinkHighlightOptions) *ui.Element {
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if math.IsNaN(value) || math.IsInf(value, 0) || opts.Duration < 0 {
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panic("mujica: BlinkHighlight needs a finite value and a non-negative Duration")
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}
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d := opts.Duration
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if d == 0 {
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d = 800 * time.Millisecond
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}
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format := opts.Format
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if format == nil {
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format = func(v float64) string { return strconv.FormatFloat(v, 'f', 2, 64) }
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}
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k := Tokens(c)
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u := Density(c).Unit()
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row := ui.Row(c).AlignItems(ui.Center).Gap(u).Padding(0, u*1.5).Radius(theme.ControlRadius).Shrink(0)
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st := ui.Local(row, "blink", func() blinkState { return blinkState{} })
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now := c.Now()
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if st.set && value != st.value {
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st.dir = 1
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if value < st.value {
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st.dir = -1
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}
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st.at = now
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slog.Debug("mujica: blink highlight", "from", st.value, "to", value)
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}
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st.value, st.set = value, true
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col := k.Success
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icon, word := "arrow-up", "blink_highlight.up"
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if st.dir < 0 {
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col, icon, word = k.Danger, "arrow-down", "blink_highlight.down"
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}
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name := format(value)
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if st.dir != 0 {
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name += ", " + msg(c, word)
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}
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row.Label(name)
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if dur := Motion(c, d); st.dir != 0 && dur > 0 {
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if p := float32(now.Sub(st.at)) / float32(dur); p < 1 {
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row.Background(col.Alpha(0.22 * (1 - p)))
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c.AnimationFrame()
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}
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}
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row.Children(func() {
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ui.Text(c, format(value)).FontFeatures("tnum").SingleLine()
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if st.dir != 0 {
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ui.Icon(c, icons.Must(icon)).Size(12, 12).TextColor(col)
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}
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})
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return row
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}
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