Calendar: components 421-440

week_picker.go

@@ -0,0 +1,96 @@
+package mujica
+
+import (
+	"fmt"
+	"log/slog"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/icons"
+)
+
+// WeekPickerOptions configure a WeekPicker.
+type WeekPickerOptions struct {
+	WeekStart WeekStart
+	// Min and Max bound the chosen week's days.
+	Min, Max Date
+	// Today is marked; zero uses the system clock.
+	Today     Date
+	Clearable bool
+	Disabled  bool
+	Label     string
+}
+
+// WeekPicker chooses a week; *value is its first day.
+func WeekPicker(c *ui.Context, value *Date, opts WeekPickerOptions) ChoiceResult {
+	datetimeCheckDate("WeekPicker value", *value)
+	datetimeCheckBounds("WeekPicker", opts.Min, opts.Max)
+	first := calendarFirstWeekday(c, opts.WeekStart)
+	weekOf := func(d Date) Date { return d.AddDays(-((int(d.Weekday()) - int(first) + 7) % 7)) }
+	if !value.IsZero() && weekOf(*value) != *value {
+		panic(fmt.Sprintf("mujica: WeekPicker value %v does not start a week", *value))
+	}
+	d := Density(c)
+	today := datetimeToday(c, opts.Today)
+	label := opts.Label
+	if label == "" {
+		label = msg(c, "week_picker.label")
+	}
+	enabled := func(x Date) bool {
+		w := weekOf(x)
+		return w.AddDays(6).within(opts.Min, Date{}) && w.within(Date{}, opts.Max)
+	}
+	col := ui.Column(c).Width(d.ControlHeight() * 8).Gap(d.Unit()).AlignItems(ui.Stretch).Disabled(opts.Disabled)
+	open := ui.Local(col, "week-picker-open", func() bool { return false })
+	cursor := ui.Local(col, "week-picker-cursor", func() Date { return Date{} })
+	hover := ui.Local(col, "week-picker-hover", func() Date { return Date{} })
+	old := *value
+	text := ""
+	if !value.IsZero() {
+		text = weekViewTitle(c, *value, value.AddDays(6))
+	}
+	col.Children(func() {
+		field := datetimeField(c, ui.Row(c), false, false)
+		field.Children(func() {
+			t := datetimeTrigger(c, text, msg(c, "week_picker.placeholder"), "calendar").Label(label).Description(text)
+			if !t.IsDisabled() && (t.Clicked() || !*open && t.Shortcut(0, ui.KeyDown)) {
+				*open, *hover = !*open, Date{}
+				*cursor = *value
+				if cursor.IsZero() {
+					*cursor = today
+				}
+			}
+			if opts.Clearable && !value.IsZero() {
+				if b := iconAction(c, icons.Must("x"), msg(c, "calendar.clear")); b.Clicked() && !b.IsDisabled() {
+					*value = Date{}
+				}
+			}
+		})
+		datetimePopup(c, field, open, false, func() {
+			band := *hover
+			if band.IsZero() {
+				band = *cursor
+			}
+			picked, hovered := calendarMonth(c, cursor, calendarConfig{
+				chosen:    func(x Date) bool { return !value.IsZero() && weekOf(x) == *value },
+				inRange:   func(x Date) bool { return weekOf(x) == weekOf(band) },
+				enabled:   enabled,
+				today:     today,
+				weekStart: opts.WeekStart,
+				autoFocus: true,
+			})
+			if hovered != *hover {
+				*hover = hovered
+				c.Invalidate()
+			}
+			if !picked.IsZero() {
+				*value, *open = weekOf(picked), false
+			}
+		})
+	})
+	changed := *value != old
+	if changed {
+		slog.Debug("mujica: week_picker change", "from", old, "to", *value)
+	}
+	return ChoiceResult{Element: col, changed: changed}
+}