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.
105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
package datetime
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import (
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"fmt"
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"log/slog"
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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 SeasonWheelOptions struct {
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Disabled bool
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}
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type SeasonWheelResult struct {
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Element *ui.Element
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Changed bool
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}
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// wheel is the season wheel's width in dots.
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const wheel = 64
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// seasonArt draws each season, clockwise from the top right.
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var seasonArt = [4]*pixel.Sprite{icon.Flower, icon.Sun, icon.Leaf, icon.Snowflake}
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// SeasonWheel chooses one of four seasons on a wheel.
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func SeasonWheel(c *ui.Context, text string, season *pixel.Season, o SeasonWheelOptions) SeasonWheelResult {
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k := pixel.K(c)
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if *season > pixel.Winter {
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panic(fmt.Sprintf("datetime: unknown Season %d", *season))
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}
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old := *season
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shell, base, st := pixel.Shell(c, func() *ui.Element {
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return ui.Box(c).Focusable().Role(ui.RoleRadioGroup).Label(text).Disabled(o.Disabled)
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})
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if base.Shortcut(0, ui.KeyRight) || base.Shortcut(0, ui.KeyDown) {
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*season = (*season + 1) % 4
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}
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if base.Shortcut(0, ui.KeyLeft) || base.Shortcut(0, ui.KeyUp) {
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*season = (*season + 3) % 4
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}
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// Enter and Space are taken, so clicks come from pointers.
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base.Shortcut(0, ui.KeyEnter)
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base.Shortcut(0, ui.KeySpace)
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if base.Clicked() {
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x, y, _ := base.PointerPosition()
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*season = pixel.Season(quarter(int(x/k.Dot())-wheel/2, int(y/k.Dot())-wheel/2))
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}
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names := []string{k.Msg("spring"), k.Msg("summer"), k.Msg("autumn"), k.Msg("winter")}
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base.Description(names[*season])
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at := int(*season)
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shell.Size(k.D(wheel), k.D(wheel)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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mid, rad := wheel/2, wheel/2-1
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g.Disc(mid, mid, rad, pixel.Face)
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// The chosen quarter lights dot by dot inside the rim.
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for y := range wheel {
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for x := range wheel {
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dx, dy := x-mid, y-mid
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if quarter(dx, dy) == at && dx*dx+dy*dy <= (rad-1)*(rad-1) {
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g.Dot(x, y, pixel.AccentLit)
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}
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}
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}
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g.Circle(mid, mid, rad, pixel.Edge)
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g.VLine(mid, 1, wheel-2, pixel.Edge)
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g.HLine(1, mid, wheel-2, pixel.Edge)
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for i, sp := range seasonArt {
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x, y := mid+6, mid-6-sp.H
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if i == 1 || i == 2 {
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y = mid + 6
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}
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if i >= 2 {
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x = mid - 6 - sp.W
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}
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ink := pixel.Faint
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if i == at {
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ink = pixel.Accent
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}
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g.Sprite(x, y, sp, 0, ink, 1)
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}
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g.Finish(st)
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})
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res := SeasonWheelResult{Element: shell, Changed: *season != old}
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if res.Changed {
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slog.Debug("8bit: season wheel", "label", text, "season", names[*season])
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}
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return res
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}
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// quarter is an offset's quarter, clockwise from the top right.
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func quarter(dx, dy int) int {
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switch {
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case dx >= 0 && dy < 0:
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return 0
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case dx >= 0:
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return 1
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case dy >= 0:
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return 2
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}
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return 3
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}
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