ZacharyZhang-NYandClaude Opus 5.5
03e1f91706
Elements are now pass-scoped value handles: tests that read bounds after a frame bind a ui.Handle. pixel tells frames apart by the build pass's root, since the Tester clock no longer moves on its own. Fix the regressions the upgrade brought: - Clipboard reads in input handlers go through c.Services(). - MyGo notes an overlay's opener after building it, so AutoFocus inside lost it; pixel.AutoFocus focuses through a Handle, and archtest bans the raw call. Dialogs hand the focus back again. - Elements around a press stay hovered: Tooltip tells a press-given focus by focus arriving under the pointer. - The web host moves the Tester clock with real time, at most 500 ms a call, and gives components the real clock. The gallery's source index also accepts CRLF checkouts. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
65 lines
2.0 KiB
Go
65 lines
2.0 KiB
Go
package chart
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import (
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"fmt"
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"strings"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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// Candle is a period's open, high, low and close.
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type Candle struct {
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Label string
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Open, High, Low, Close float64
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}
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type CandlestickOptions struct {
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// Width and Height are dots; zeros mean 160 by 80.
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Width, Height int
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}
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// Candlestick draws wicks and bodies: up Good, down Bad.
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func Candlestick(c *ui.Context, text string, candles []Candle, o CandlestickOptions) ui.Element {
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k := pixel.K(c)
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if len(candles) == 0 {
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panic("chart: Candlestick has no candles")
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}
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w, h := size("Candlestick", o.Width, o.Height, 160, 80)
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labels, lows, highs := make([]string, len(candles)), make([]float64, len(candles)), make([]float64, len(candles))
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for i, cd := range candles {
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span([]float64{cd.Open, cd.High, cd.Low, cd.Close})
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if cd.Low > min(cd.Open, cd.Close) || cd.High < max(cd.Open, cd.Close) {
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panic(fmt.Sprintf("chart: candle %q has open %v and close %v outside %v–%v", cd.Label, cd.Open, cd.Close, cd.Low, cd.High))
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}
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labels[i], lows[i], highs[i] = cd.Label, cd.Low, cd.High
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}
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lo, _ := span(lows)
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_, hi := span(highs)
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p := fit(lo, hi, w, h, labels)
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return ui.Box(c).Size(k.D(w), k.D(h)).Role(ui.RoleImage).Label(text).Description(ohlc(candles)).Draw(func(pt *ui.Painter, r ui.Rect) {
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g := k.Canvas(pt, r)
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p.grid(g, labels)
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bw := max(1, p.w/len(candles)/2)
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for i, cd := range candles {
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x, ink := p.slot(i, len(candles)), pixel.Good
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if cd.Close < cd.Open {
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ink = pixel.Bad
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}
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g.VLine(x, p.at(cd.High), p.at(cd.Low)-p.at(cd.High)+1, pixel.Edge)
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top, bottom := p.at(max(cd.Open, cd.Close)), p.at(min(cd.Open, cd.Close))
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g.Rect(x-bw/2, top, max(1, bw), max(1, bottom-top), ink)
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}
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})
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}
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// ohlc lists each candle's open, high, low and close.
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func ohlc(candles []Candle) string {
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parts := make([]string, len(candles))
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for i, cd := range candles {
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parts[i] = cd.Label + " " + nums([]float64{cd.Open, cd.High, cd.Low, cd.Close})
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}
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return strings.Join(parts, "; ")
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}
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