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>
58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
package chart
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import (
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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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type CrosshairOptions 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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// Crosshair is a line chart; hover crosses the nearest point.
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func Crosshair(c *ui.Context, text string, labels []string, series []Series, o CrosshairOptions) ui.Element {
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k := pixel.K(c)
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w, h := size("Crosshair", o.Width, o.Height, 160, 80)
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p := fitSeries(labels, series, w, h)
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e := ui.Box(c).Size(k.D(w), k.D(h)).Role(ui.RoleImage).Label(text).Description(readSeries(labels, series))
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at, py := -1, 0
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if x, y, over := e.PointerPosition(); over && len(labels) > 0 {
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at = max(0, min(len(labels)-1, (int(x/k.Dot())-p.x)*len(labels)/max(1, p.w)))
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py = max(p.y, min(p.y+p.h-1, int(y/k.Dot())))
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}
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return e.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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lines(g, p, len(labels), series)
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if at < 0 {
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return
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}
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x := p.slot(at, len(labels))
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g.Checker(x, p.y, 1, p.h, pixel.Ink)
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g.Checker(p.x, py, p.w, 1, pixel.Ink)
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// The readout lists the label, then each series' value.
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rows := []string{labels[at]}
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for _, s := range series {
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rows = append(rows, num(s.Values[at]))
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}
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bw, bh := 4, 3
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for _, row := range rows {
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bw, bh = max(bw, tinyW(row)+4), bh+inkH(small(row))+2
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}
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bx := min(w-bw, x+3)
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g.Frame(bx, p.y, bw, bh, pixel.Flat, pixel.Lit)
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y := p.y + 2
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for i, row := range rows {
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ink := pixel.Ink
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if i > 0 {
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ink = pick(series[i-1].Slot, i-1)
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}
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sm := small(row)
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mark(g, bx+2, y, row, sm, ink)
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y += inkH(sm) + 2
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}
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})
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}
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