73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
package chart
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import (
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"math"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/core"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/data"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/icons"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/theme"
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)
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// TrendIndicatorOptions configure a TrendIndicator.
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type TrendIndicatorOptions struct {
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// Precision is the decimals shown, 0 or more.
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Precision int
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// Unit follows the number, as "%".
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Unit string
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// Note explains the change, as "vs last week".
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Note string
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// Invert marks falls as good, as for costs or errors.
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Invert bool
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// Format replaces the built-in signed number.
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Format func(v float64) string
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}
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// TrendIndicator shows signed change, direction, and semantic color.
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func TrendIndicator(c *ui.Context, change float64, opts TrendIndicatorOptions) *ui.Element {
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if opts.Precision < 0 || math.IsNaN(change) || math.IsInf(change, 0) {
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panic("mujica: TrendIndicator needs a number and Precision ≥ 0")
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}
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k := core.Tokens(c)
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u := core.Density(c).Unit()
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word, text := trendWords(c, change, opts)
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col, icon := k.TextMuted, "minus"
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switch {
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case change > 0:
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col, icon = k.Success, "arrow-up"
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case change < 0:
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col, icon = k.Danger, "arrow-down"
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}
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if opts.Invert && change != 0 {
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col = map[bool]ui.Color{true: k.Danger, false: k.Success}[change > 0]
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}
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e := ui.Row(c).Gap(u).AlignItems(ui.Center).Wrap().Role(ui.RoleText).Label(word + " " + text)
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e.Children(func() {
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ui.Row(c).Gap(u / 2).AlignItems(ui.Center).TextColor(col).Children(func() {
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ui.Icon(c, icons.Must(icon)).Size(14, 14)
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ui.Text(c, text).FontWeight(600).SingleLine()
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})
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if opts.Note != "" {
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ui.Text(c, opts.Note).FontSize(core.FontSize(c, theme.CaptionSize)).TextColor(k.TextMuted)
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}
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})
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return e
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}
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// trendWords formats direction and signed change.
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func trendWords(c *ui.Context, change float64, opts TrendIndicatorOptions) (word, text string) {
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word = core.Msg(c, "trend_indicator.flat")
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switch {
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case change > 0:
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word = core.Msg(c, "trend_indicator.up")
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case change < 0:
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word = core.Msg(c, "trend_indicator.down")
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}
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if opts.Format != nil {
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return word, opts.Format(change)
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}
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return word, data.StatisticSigned(change, opts.Precision) + opts.Unit
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}
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