Split into category packages; module github.com/ZacharyZhang-NY/MujicaUI

datetime/year_picker.go

@@ -0,0 +1,80 @@
+package datetime
+
+import (
+	"fmt"
+	"log/slog"
+	"strconv"
+
+	"github.com/egoist/mygo/ui"
+
+	"github.com/ZacharyZhang-NY/MujicaUI/core"
+)
+
+// YearPickerOptions configure a YearPicker.
+type YearPickerOptions struct {
+	// Min and Max bound the years chosen; zero leaves a side open.
+	Min, Max    int
+	DisableYear func(int) bool
+	Clearable   bool
+	// Today marks the current year; zero uses the system clock.
+	Today    core.Date
+	Disabled bool
+	// ReadOnly keeps the field focusable and copyable but blocks the popup and clearing.
+	ReadOnly bool
+	// Label names the field for assistive technology.
+	Label string
+}
+
+// YearPicker chooses a year into *value from a decade page; zero is none.
+func YearPicker(c *ui.Context, value *int, opts YearPickerOptions) DateTimeResult {
+	if *value < 0 || opts.Min < 0 || opts.Max < 0 || opts.Min != 0 && opts.Max != 0 && opts.Min > opts.Max {
+		panic(fmt.Sprintf("mujica: YearPicker value %d or range %d..%d is not valid", *value, opts.Min, opts.Max))
+	}
+	now := core.DatetimeToday(c, opts.Today).Year
+	home := *value
+	if home == 0 {
+		home = now
+	}
+	decade := func(o int) int { return o / 10 * 10 }
+	text := ""
+	if *value != 0 {
+		text = strconv.Itoa(*value)
+	}
+	label := opts.Label
+	if label == "" {
+		label = core.Msg(c, "year_picker.placeholder")
+	}
+	col, picked, ok, cleared := datetimeGridPicker(c, datetimeGridField{
+		text: text, placeholder: core.Msg(c, "year_picker.placeholder"), label: label,
+		clearable: opts.Clearable, hasValue: *value != 0, disabled: opts.Disabled, readOnly: opts.ReadOnly, home: home,
+	}, datetimeGridConfig{
+		pageOf:  func(o int) (int, int) { return decade(o) - 1, 12 },
+		cols:    3,
+		page:    10,
+		title:   func(start int) string { return fmt.Sprintf("%d – %d", start+1, start+10) },
+		prev:    core.Msg(c, "year_picker.prev"),
+		next:    core.Msg(c, "year_picker.next"),
+		text:    strconv.Itoa,
+		label:   strconv.Itoa,
+		chosen:  func(o int) bool { return o == *value },
+		current: func(o int) bool { return o == now },
+		enabled: func(o int) bool {
+			return o > 0 && (opts.Min == 0 || o >= opts.Min) && (opts.Max == 0 || o <= opts.Max) &&
+				(opts.DisableYear == nil || !opts.DisableYear(o))
+		},
+		muted: func(o, start int) bool { return o == start || o == start+11 },
+	})
+	to := *value
+	switch {
+	case cleared:
+		to = 0
+	case ok:
+		to = picked
+	}
+	changed := to != *value
+	if changed {
+		slog.Debug("mujica: year_picker change", "from", *value, "to", to)
+		*value = to
+	}
+	return DateTimeResult{Element: col, changed: changed}
+}