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.
46 lines
1.4 KiB
Go
46 lines
1.4 KiB
Go
package datetime
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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/8bitMyGoUI/pixel"
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)
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type AnalogClockOptions struct {
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// Size is the face's width in dots; zero means 48.
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Size int
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}
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// AnalogClock ticks each second; its hands are Bresenham lines.
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func AnalogClock(c *ui.Context, o AnalogClockOptions) *ui.Element {
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k := pixel.K(c)
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size := pixel.Or("AnalogClock Size", o.Size, 48)
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k.Tick(c, 1)
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now := k.Now()
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h, m, s := now.Clock()
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// hand ends at turn (0–1 from twelve) and length r.
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hand := func(cx, cy int, turn float64, r int) (int, int) {
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a := turn * 2 * math.Pi
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return cx + int(math.Round(float64(r)*math.Sin(a))), cy - int(math.Round(float64(r)*math.Cos(a)))
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}
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return ui.Box(c).Size(k.D(size), k.D(size)).Role(ui.RoleImage).Label(now.Format("15:04:05")).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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cx, cy, rad := size/2, size/2, size/2-1
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g.Disc(cx, cy, rad, pixel.Face)
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g.Circle(cx, cy, rad, pixel.Edge)
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for i := range 12 {
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x, y := hand(cx, cy, float64(i)/12, rad-3)
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g.Dot(x, y, pixel.Edge)
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}
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x, y := hand(cx, cy, (float64(h%12)+float64(m)/60)/12, rad/2)
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g.Line(cx, cy, x, y, pixel.Ink)
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x, y = hand(cx, cy, (float64(m)+float64(s)/60)/60, rad-5)
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g.Line(cx, cy, x, y, pixel.Ink)
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x, y = hand(cx, cy, float64(s)/60, rad-4)
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g.Line(cx, cy, x, y, pixel.Accent)
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g.Dot(cx, cy, pixel.Accent)
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})
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}
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