ZacharyZhang-NY
a2f2796455
Calendars, date and time inputs, pickers, clocks, timers, a sun dial, a season wheel, an agenda and a day schedule. Kit.At rebuilds at a moment (relative times, midnight). Stepper and NumberInput arrows stop under Inert. DateInput parks a popup focus as its own.
77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
package datetime
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import (
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"fmt"
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"log/slog"
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"math"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/icon"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type SunDialOptions struct {
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Disabled bool
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}
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type SunDialResult struct {
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Element *ui.Element
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Changed bool
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}
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// Dial size in dots: the arc's middle, radius and box.
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const dialW, dialH, dialR = 96, 56, 40
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// SunDial arcs the sun or moon; a drag sets *hour.
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func SunDial(c *ui.Context, text string, hour *int, o SunDialOptions) SunDialResult {
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k := pixel.K(c)
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if *hour < 0 || *hour > 23 {
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panic(fmt.Sprintf("datetime: SunDial hour %d outside 0–23", *hour))
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}
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old := *hour
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shell, base, st := pixel.Shell(c, func() *ui.Element {
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return ui.Box(c).Focusable().Role(ui.RoleSlider).Label(text).Disabled(o.Disabled)
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})
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if base.Shortcut(0, ui.KeyLeft) {
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*hour = (*hour + 23) % 24
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}
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if base.Shortcut(0, ui.KeyRight) {
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*hour = (*hour + 1) % 24
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}
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// The width spans the whole day, midnight to midnight.
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if _, _, held := base.Dragged(); held && !st.Disabled && !pixel.Current(c).Inert {
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x, _, _ := base.PointerPosition()
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*hour = max(0, min(23, int(x/k.D(dialW)*24)))
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}
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h := *hour
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label := fmt.Sprintf("%02d:00", h)
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base.Description(label)
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day := h >= 6 && h < 18
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shell.Size(k.D(dialW), k.D(dialH)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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sky, body := pixel.Lit, icon.Sun
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if !day {
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sky, body = pixel.Shade, icon.Moon
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}
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g.Frame(0, 0, g.W, g.H, pixel.Sunken, sky)
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cx, cy := dialW/2, dialH-6
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g.HLine(2, cy, dialW-4, pixel.Edge)
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for i := 0; i <= 48; i += 2 {
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a := math.Pi * float64(i) / 48
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g.Dot(cx+int(math.Round(dialR*math.Cos(a))), cy-int(math.Round(dialR*math.Sin(a))), pixel.Faint)
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}
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t := float64((h+18)%12) / 12
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a := math.Pi * (1 - t)
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x, y := cx+int(math.Round(dialR*math.Cos(a))), cy-int(math.Round(dialR*math.Sin(a)))
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g.Sprite(x-body.W/2, y-body.H/2, body, 0, pixel.Ink, 1)
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g.Micro(3, 3, label, pixel.Ink, 1)
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g.Finish(st)
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})
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res := SunDialResult{Element: shell, Changed: *hour != old}
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if res.Changed {
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slog.Debug("8bit: sundial", "label", text, "hour", *hour)
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}
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return res
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}
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