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.
87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
package datetime
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import (
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"fmt"
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"slices"
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"time"
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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 DayScheduleOptions struct {
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// From and To bound the hours; zeros mean 8–18.
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From, To int
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}
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// hourH is an hour row's height; gutter holds labels.
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const hourH, gutter = pixel.LineHeight + 4, 24
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// DaySchedule places events on hour rows by start and length.
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func DaySchedule(c *ui.Context, events []Event, o DayScheduleOptions) *ui.Element {
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k := pixel.K(c)
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from, to := o.From, o.To
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if from == 0 && to == 0 {
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from, to = 8, 18
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}
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if from < 0 || to > 24 || from >= to {
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panic(fmt.Sprintf("datetime: DaySchedule hours %d to %d", from, to))
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}
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sorted := slices.Clone(events)
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slices.SortStableFunc(sorted, func(a, b Event) int { return a.Start.Compare(b.Start) })
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// Chains of overlapping events share the width in lanes.
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lanes, shared := make([]int, len(sorted)), make([]int, len(sorted))
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var ends []time.Time
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var last time.Time
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head := 0
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for i, e := range sorted {
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if i > 0 && e.Start.Compare(last) >= 0 {
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for j := head; j < i; j++ {
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shared[j] = len(ends)
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}
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head, ends = i, nil
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}
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lane := slices.IndexFunc(ends, func(end time.Time) bool { return end.Compare(e.Start) <= 0 })
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if lane < 0 {
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lane, ends = len(ends), append(ends, time.Time{})
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}
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lanes[i], ends[lane] = lane, e.Start.Add(e.Length)
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if end := ends[lane]; end.Compare(last) > 0 || i == head {
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last = end
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}
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}
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for j := head; j < len(sorted); j++ {
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shared[j] = len(ends)
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}
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box := ui.Box(c).FillWidth().Height(k.D((to - from) * hourH)).Role(ui.RoleList)
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w, check := pixel.WrapWidth(c, box)
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return box.Draw(func(p *ui.Painter, r ui.Rect) {
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check(r)
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g := k.Canvas(p, r)
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for h := from; h < to; h++ {
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y := (h - from) * hourH
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g.Micro(0, y+1, fmt.Sprintf("%02d:00", h), pixel.Faint, 1)
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g.Checker(gutter, y, g.W-gutter, 1, pixel.Edge)
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}
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}).Children(func() {
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for i, e := range sorted {
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// Minutes from the top row, cut to the hours shown.
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top := e.Start.Hour()*60 + e.Start.Minute() - from*60
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end := min(top+int(e.Length/time.Minute), (to-from)*60)
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if top = max(0, top); end <= top {
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continue
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}
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h := max(3, (end-top)*hourH/60)
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y := min(top*hourH/60, (to-from)*hourH-h)
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laneW := max(4, (w-gutter)/shared[i])
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ui.Box(c).Absolute().Left(k.D(gutter+lanes[i]*laneW)).Top(k.D(y)).Size(k.D(laneW-1), k.D(h)).Role(ui.RoleListItem).
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Label(e.Start.Format("15:04") + " " + e.Title).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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g.Frame(0, 0, g.W, g.H, pixel.Raised, pixel.AccentLit)
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g.Clip(1, 1, g.W-2, g.H-2, func() { g.Text(3, 0, e.Title, pixel.Ink, 1) })
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})
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}
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})
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}
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