Shadcn Event Calendar (Base UI)

import { EventCalendar } from "@/components/reui/event-calendar/event-calendar"
import { EventCalendarContent } from "@/components/reui/event-calendar/event-calendar-content"
import { EventCalendarNav } from "@/components/reui/event-calendar/event-calendar-nav"
import type { CalendarEvent } from "@/components/reui/event-calendar/event-calendar-types"

const [events, setEvents] = useState<CalendarEvent[]>(initialEvents)
 
return (
  <EventCalendar
    events={events}
    onEventsChange={setEvents}
    defaultView="week"
    className="h-[600px]"
  >
    <EventCalendarNav />
    <EventCalendarContent />
  </EventCalendar>
)

Prop	Type	Default	Description
`calendar`	`EventCalendarInstance<TData>`	-	Adopt a hoisted `useEventCalendarState` instance; option props are then ignored (a dev warning fires if both are passed).
`apiRef`	`RefObject<EventCalendarApi<TData> \| null>`	-	Imperative escape hatch; receives the instance API for use outside the tree.
`children`	`ReactNode`	-	Composed slots, typically `EventCalendarNav`, `EventCalendarToolbar`, and `EventCalendarContent`.
`className`	`string`	-	Additional CSS classes for the root element.
`render`	`useRender` render prop	-	Replace the rendered root element.

Prop	Type	Default	Description
`showViewSwitcher`	`boolean`	`true`	Render the view switcher in the composed layout; turn off for fixed-view embeds.
`children`	`ReactNode`	-	Replaces the default composed layout entirely.
`className`	`string`	-	Additional CSS classes for the nav container.

Prop	Type	Default	Description
`tooltip`	`ReactNode \| null`	-	Hover/focus-visible hint. Today defaults to the current date; Prev/Next default to their i18n labels. Pass `null` to disable this one button.
`children`	`ReactNode`	-	Replaces the default label or chevron icon.
`render`	`useRender` render prop	-	Replace the rendered button element.

Prop	Type	Default	Description
`format`	`(ctx: { title: string }) => ReactNode`	-	Wrap or transform the computed title text.

Prop	Type	Default	Description
`tooltip`	`ReactNode \| null`	-	Hover-only hint (force-closed while the menu is open); defaults to the "Select view" label.
`children`	`ReactNode`	-	Replaces the default trigger content (current view name + chevron).

Prop	Type	Default	Description
`mode`	`"auto" \| "single" \| "range"`	`"auto"`	`"auto"` resolves to `"range"` for week/N-days/agenda and `"single"` otherwise.
`tooltip`	`ReactNode \| null`	`null`	No tooltip by default (the button opens an overlay); pass a node to opt in.
`children`	`ReactNode`	-	Replaces the default calendar icon.

Prop	Type	Default	Description
`components`	`Partial<Record<CalendarView, ComponentType>>`	-	Swap individual view implementations (merged over the root `components` prop).
`children`	`ReactNode`	-	Replaces the switchboard entirely; read `useEventCalendarView()` inside.

Prop	Type	Default	Description
`maxEventsPerCell`	`number \| "auto"`	-	Per-view override of the `maxEventsPerCell` view config (bars plus chips).

Prop	Type	Default	Description
`view`	`"week" \| "day" \| "days"`	-	`Required`. Which time-based view this grid renders.
`dayStartHour`	`number`	-	Per-view override of the `dayStartHour` option.
`dayEndHour`	`number`	-	Per-view override of the `dayEndHour` option.
`showAllDay`	`boolean`	`true`	Render the all-day row above the time track.
`interval`	`number`	-	Gutter/gridline interval in minutes (clamped 5 to 240); defaults to the `interval` view config.

Prop	Type	Default	Description
`dayStartHour`	`number`	-	Per-view override of the `dayStartHour` option.
`dayEndHour`	`number`	-	Per-view override of the `dayEndHour` option.
`showAllDay`	`boolean`	`true`	Render the all-day row above the time track.
`interval`	`number`	-	Gutter/gridline interval in minutes (clamped 5 to 240); defaults to the `interval` view config.

Method	Signature	Description
`next` / `prev`	`() => void`	Step the anchor date one period forward or backward for the current view.
`today`	`() => void`	Jump to now.
`goTo`	`(date: Date) => void`	Jump to a date.
`setView`	`(view: CalendarView, opts?: { dayCount?: number }) => void`	Switch view; unknown views fall back to the first enabled view with a dev warning.
`setDayCount`	`(count: number) => void`	Set the N-day count (min 1).
`getEvents`	`() => CalendarEvent<TData>[]`	Current events array.
`getEvent`	`(id: string) => CalendarEvent<TData> \| undefined`	Find one event by id.
`setEvents`	`(events: CalendarEvent<TData>[]) => void`	Replace the events array.
`addEvent`	`(event: CalendarEvent<TData>) => void`	Append an event.
`updateEvent`	`(id: string, patch: Partial<CalendarEvent<TData>>) => void`	Patch an event; timing patches route through `onEventUpdate` with `source: "api"`.
`removeEvent`	`(id: string) => void`	Remove an event.
`getOccurrences`	`(range?: EventCalendarDateRange) => EventCalendarOccurrence<TData>[]`	Expanded, sorted occurrences; defaults to the visible range.
`getOccurrencesForDay`	`(day: Date) => EventCalendarOccurrence<TData>[]`	Deduplicated occurrences touching one day.
`findOverlapping`	`(candidate: { start: Date; end: Date; excludeEventId?: string }) => EventCalendarOccurrence<TData>[]`	Occurrences overlapping a candidate range.
`select`	`(selection: Partial<EventCalendarSelection>) => void`	Patch the selection.
`selectEvent`	`(key: string, opts?: { additive?: boolean }) => void`	Select an occurrence key; `additive` toggles it within the current set.
`clearSelection`	`() => void`	Clear event keys and the committed slot.
`setInteractions`	`(patch: Partial<EventCalendarInteractions>) => void`	Toggle drag, resize, or slot selection.
`setViewSettings`	`(patch: EventCalendarViewSettings) => void`	Patch the user display toggles.
`getVisibleRange`	`() => EventCalendarDateRange`	The full rendered grid range (including outside days); fetch remote data for this.
`getActiveRange`	`() => EventCalendarDateRange`	The logical period (the month or week itself).
`toZoned`	`(date: Date) => Date`	The instant re-expressed in the calendar's display time zone (a `TZDate`).
`scrollToTime`	`(time: Date \| number) => void`	Scroll a time grid to an instant or minutes-from-day-start; no-op outside time-grid views.

Property	Type	Default	Description
`id`	`string`	-	`Required`. Stable event id.
`title`	`string`	-	`Required`. Display title.
`start`	`Date`	-	`Required`. Start instant (consumers parse ISO strings themselves).
`end`	`Date`	-	`Required`. Exclusive end instant; must be greater than or equal to `start`.
`allDay`	`boolean`	-	Render as an all-day bar; date comparison is day-granular in the display zone.
`recurrence`	`EventCalendarRecurrenceRule \| string`	-	Structured rule or a raw `"RRULE:..."` line.
`recurringEventId`	`string`	-	Marks this event as an edited single occurrence of that series.
`originalStart`	`Date`	-	Which occurrence it replaces (RECURRENCE-ID semantics).
`color`	`string`	-	Token or CSS color; flows to the `--ec-event-color` CSS variable.
`readOnly`	`boolean`	-	Excluded from drag and resize regardless of the interactions state.
`draggable`	`boolean`	-	Per-event override; the default comes from `interactions.drag`.
`resizable`	`boolean`	-	Per-event override; the default comes from `interactions.resize`.
`priority`	`number`	-	Packing prominence; feeds the `getEventPriority` ordering.
`zIndex`	`number`	-	Explicit stacking override; wins over the computed z-index.
`resourceId`	`string`	-	Bookable resource this event belongs to (resource view).
`data`	`TData`	-	Consumer payload, fully generic.

Property	Type	Default	Description
`id`	`string`	-	`Required`. Stable resource id.
`title`	`string`	-	`Required`. Column header text (or `renderResourceHeader`).
`color`	`string`	-	Token or CSS color for subtle row/column accents.
`children`	`EventCalendarResource[]`	-	Child resources; only leaves become booking columns.

Property	Type	Default	Description
`freq`	`"daily" \| "weekly" \| "monthly" \| "yearly"`	-	`Required`. Recurrence frequency.
`interval`	`number`	`1`	Every N periods.
`count`	`number`	-	Total number of occurrences.
`until`	`Date`	-	Inclusive end instant.
`byWeekday`	`Array<EventCalendarWeekday \| { day: EventCalendarWeekday; ordinal: number }>`	-	Weekdays; ordinals (`2TU`, `-1FR`) apply to monthly/yearly rules.
`byMonthDay`	`number[]`	-	Days of the month; negative values count back from month end.
`byMonth`	`number[]`	-	Months (1 to 12) for yearly rules.
`weekStart`	`EventCalendarWeekday`	-	WKST equivalent.
`exDates`	`Date[]`	-	Excluded instants; matching occurrences are removed (they still consume their `count` slot).
`rDates`	`Date[]`	-	Extra instants added to the series, each with the event's own duration.

Property	Type	Description
`key`	`string`	Stable per instance: `${event.id}::${startISO}`.
`eventId`	`string`	The source event id.
`event`	`CalendarEvent<TData>`	The source event.
`start` / `end`	`Date`	This instance's instants (end exclusive).
`allDay`	`boolean`	Resolved all-day flag.
`isRecurring`	`boolean`	Whether it came from a recurrence expansion.
`recurrenceIndex`	`number`	Series ordinal, when recurring.

Property	Type	Description
`event`	`CalendarEvent<TData>`	The event being changed.
`occurrence`	`EventCalendarOccurrence<TData> \| null`	The dragged occurrence; `null` when `source` is `"api"`.
`start`	`Date`	Proposed start.
`end`	`Date`	Proposed exclusive end.
`allDay`	`boolean`	Proposed all-day flag.
`resourceId`	`string`	Proposed resource when the gesture crossed resource columns.
`source`	`"drag" \| "resize-start" \| "resize-end" \| "keyboard" \| "api"`	What produced the proposal.

Property	Type	Description
`date`	`Date`	Clicked instant (snapped in time grids) or day (day-granular surfaces).
`end`	`Date`	Present for timed slots: `date` plus `slotDuration`.
`allDay`	`boolean`	Whether the click landed on a day-granular surface.
`view`	`CalendarView`	The view the click happened in.
`resourceId`	`string`	Present when the click happened inside a resource column.

Property	Type	Description
`start`	`Date`	Draft start.
`end`	`Date`	Draft exclusive end.
`allDay`	`boolean`	Whether the draft was drawn on a day-granular surface.
`view`	`CalendarView`	The view the draft was drawn in.
`resourceId`	`string`	Present when the slot was selected inside a resource column.

Property	Type	Description
`view`	`CalendarView`	Active view (`"month" \| "week" \| "day" \| "days" \| "agenda" \| "resource"`).
`date`	`Date`	Anchor date.
`dayCount`	`number`	Day count for the `days` view.
`visibleRange`	`EventCalendarDateRange`	Full rendered grid range including outside days; fetch remote data for this.
`activeRange`	`EventCalendarDateRange`	The logical period (the month or week itself).
`events`	`CalendarEvent<TData>[]`	Current events.
`selection`	`EventCalendarSelection`	Selected occurrence keys plus the committed slot.
`interactions`	`EventCalendarInteractions`	Effective interaction toggles.
`loading`	`boolean`	The `loading` prop.
`drag`	`EventCalendarDragState<TData> \| null`	Live move/resize gesture (kind, occurrence, proposed instants, validity), or `null`.
`slotDraft`	`EventCalendarSlotDraft \| null`	Live drag-create rectangle, or `null`.
`viewSettings`	`EventCalendarViewSettings`	User display toggles.

Hook	Signature	Description
`useEventCalendarState`	`(options?: UseEventCalendarStateOptions<TData>) => EventCalendarInstance<TData>`	Headless root hook: the full engine without markup. Pass the instance to `<EventCalendar calendar={instance}>` or drive fully custom UI from `getState` / `subscribe` / `api`.
`useEventCalendar`	`() => EventCalendarInstance<TData>`	The stable calendar instance from context; throws outside `<EventCalendar>`.
`useEventCalendarSelector`	`(selector: (state: EventCalendarState<TData>) => T, options?: { calendar?, isEqual? }) => T`	Fine-grained subscription with equality memoization (`Object.is` default).
`useEventCalendarView`	`() => { view, dayCount, availableViews, setView }`	Active view state plus the resolved `views` option.
`useEventCalendarNavigation`	`() => { date, title, visibleRange, activeRange, next, prev, today, goTo, isToday }`	Navigation state and actions; `title` is the formatted period title.
`useEventCalendarSelection`	`() => { selection, select, selectEvent, clearSelection }`	Selection state and actions.
`useEventCalendarInteractions`	`() => { interactions, setInteractions }`	Interaction toggles.
`useEventCalendarOccurrences`	`(range?: EventCalendarDateRange) => EventCalendarOccurrence<TData>[]`	Expanded, sorted occurrences; defaults to the visible range.
`useEventCalendarDay`	`(day: Date) => { segments: { allDay, timed }, isToday, isOutside }`	Per-cell subscription; only cells whose segments changed re-render.
`useEventCalendarWeek`	`(day: Date) => { bars, laneCount, rowStart }`	Per-week-row subscription for the month view's laned multi-day bars.
`useEventCalendarViewSettings`	`() => { viewSettings, setViewSettings, effective }`	User display toggles plus the effective values after view-config fallback.
`useEventCalendarSettings`	`() => EventCalendarSettings<TData>`	Resolved settings including merged i18n; re-renders only when settings change.
`useEventCalendarSettingsVersion`	`(instance: EventCalendarInstance<TData>) => number`	Subscribes to settings changes only (version counter, not state).
`useEventCalendarViewConfig`	`() => EventCalendarViewConfig<TData>`	Root-level display props and render overrides, for view components.
`useEventCalendarViewContext`	`() => { view: CalendarView }`	The rendering view of the nearest view component; throws outside a view.
`useEventCalendarGestures`	`() => { beginMove, beginResize, beginCreate, canDrag, canResize }`	Per-chip / per-surface pointer gesture wiring for custom views and cells.
`useEventCalendarEventChip`	`() => { occurrence, segment, isDragging, isSelected }`	The chip's subject; usable inside `renderEvent` content and chip children.
`useNow`	`(intervalMs?: number) => Date`	Current time, refreshed on an interval (default 30000 ms) and on tab focus.

Function	Signature	Description
`flattenResources`	`(resources: EventCalendarResource[], depth?: number) => Array<{ resource, depth }>`	Depth-first flatten of the resource tree, parents included.
`buildEventIndex`	`(events, visibleRange, opts) => EventCalendarIndex<TData>`	Expand, segment, and pack all events for a range into `{ occurrences, byDay, weekRows }`.
`segmentOccurrence`	`(occurrence, range, timeZone) => EventCalendarSegment<TData>[]`	The canonical multi-day segmentation (exclusive end, zero-duration safe).
`packTimedSegments`	`(segments) => void`	Google-style overlap packing for one day's timed segments (mutates `column` fields in place).
`packWeekRowLanes`	`(segments, rowIndex, rowStart, timeZone) => EventCalendarSegment<TData>[]`	Greedy lane packing of bar segments within one week row; returns new merged bar segments.
`defaultEventOrder`	`(a, b: EventCalendarOccurrence) => number`	Default sort: earlier start, then longer duration, then key.
`getViewDateRange`	`(view, date, opts) => { visibleRange, activeRange }`	The rendered and logical ranges for a view and anchor date.
`stepDate`	`(view, date, direction, opts) => Date`	The anchor date stepped one period forward or backward.
`toZoned`	`(date: Date, timeZone: string) => TZDate`	The instant re-expressed in the display time zone.
`zonedStartOfDay`	`(date: Date, timeZone: string) => TZDate`	Zoned midnight of the day containing the instant.
`getDayKey`	`(date: Date, timeZone: string) => string`	Stable per-day key (`yyyy-MM-dd`) in the display time zone.
`getDayTotalMinutes`	`(dayStart: Date, timeZone: string) => number`	Day length in minutes; 1380/1500 on DST transition days.
`getRangeKey`	`(range: EventCalendarDateRange) => string`	Cheap string cache key for a range.
`snapMinutes`	`(minutes: number, snap: number) => number`	Round minutes to the nearest snap step.
`rangesIntersect`	`(a, b: EventCalendarDateRange) => boolean`	Half-open range intersection.
`eventsOverlap`	`(a, b: { start: Date; end: Date }) => boolean`	Half-open overlap test.
`isBarOccurrence`	`(occurrence: EventCalendarOccurrence) => boolean`	True when the occurrence renders as a bar (all-day or multi-day).
`spansMultipleDays`	`(occ: { start: Date; end: Date }) => boolean`	Longer than 24 hours (an event ending exactly at midnight is single-day).
`resolveOffDay`	`(day, timeZone, config: boolean \| EventCalendarOffDaysConfig \| undefined) => boolean`	Whether a day is an off day in the display zone.
`minuteBlockStyle`	`(startMin, endMin, boundsStartMin) => CSSProperties`	Absolute top/height for a minute-positioned overlay block (from `event-calendar-time-grid.tsx`).
`wasRecentDrag`	`() => boolean`	True shortly after a gesture ended; lets click handlers ignore the click that ends a drag.
`wasRecentChipPress`	`() => boolean`	True shortly after a press started on an event chip; guards slot-create clicks.
`markChipPress`	`() => void`	Flag a chip press (called by `EventCalendarEvent`); needed when building custom chips.

Function	Signature	Description
`expandRecurrence`	`(event, range, ctx: { timeZone }) => EventCalendarOccurrence<TData>[]`	Expand one event into its occurrences intersecting the range; wall-time iteration in the display zone (DST-safe).
`parseRRuleString`	`(input: string, timeZone?: string) => EventCalendarRecurrenceRule`	Parse a raw `RRULE` line (with or without the prefix); Z-less `UNTIL` values are wall time in the given zone.
`formatRRuleString`	`(rule: EventCalendarRecurrenceRule) => string`	Serialize the structured subset back to an `RRULE` line (without prefix).

Prop	Type	Default	Description
`events` / `defaultEvents`	`CalendarEvent<TData>[]`	`[]`	The events (controlled / uncontrolled).
`view` / `defaultView`	`CalendarView`	`"month"`	Active view.
`date` / `defaultDate`	`Date`	`new Date()`	Anchor date.
`dayCount` / `defaultDayCount`	`number`	`3`	Day count for the `days` view (min 1).
`selection` / `defaultSelection`	`EventCalendarSelection`	`{ eventKeys: [], slot: null }`	Selection state.
`interactions` / `defaultInteractions`	`Partial<EventCalendarInteractions>`	all `true`	Interaction toggles, merged over the defaults.
`viewSettings` / `defaultViewSettings`	`EventCalendarViewSettings`	`{}`	User display toggles.
`loading`	`boolean`	`false`	Dims the content area and disables pointer events.
`views`	`CalendarView[]`	base views	Enabled views; defaults to `["month", "week", "day", "days", "agenda"]`, plus `"resource"` when `resources` is non-empty.
`timeZone`	`string`	system time zone	IANA display time zone; all day math and rendering happen in it.
`locale`	`Locale`	-	date-fns locale for every formatted string.
`weekStartsOn`	`0 \| 1 \| 2 \| 3 \| 4 \| 5 \| 6`	`locale`	First day of the week (0 = Sunday). Defaults to the `locale`'s own first day when one is set, so a German or French calendar starts on Monday; an explicit value always wins.
`dayStartHour`	`number`	`0`	First rendered hour in time grids.
`dayEndHour`	`number`	`24`	Last rendered hour in time grids.
`slotDuration`	`number`	`30`	Duration in minutes of a click-created slot (`onSlotClick` end).
`snapDuration`	`number`	`15`	Snap granularity in minutes for drag, resize, and drag-create.
`agendaDayCount`	`number`	`30`	Days covered by the agenda view window.
`fixedWeeks`	`boolean`	`true`	Month view always renders 6 weeks.
`showOutsideDays`	`boolean`	`true`	Show leading/trailing outside days in the month view.
`i18n`	`Partial<EventCalendarI18nConfig>`	-	Per-key overrides of labels, view names, formats, and formatter functions.
`resources`	`EventCalendarResource[]`	`[]`	Bookable resources for the resource view.
`getEventPriority`	`(event: CalendarEvent<TData>) => number`	`event.priority ?? 0`	Packing prominence resolver.
`eventOrder`	`(a, b: EventCalendarOccurrence<TData>) => number`	`defaultEventOrder`	Occurrence sort comparator (default: earlier start, then longer duration, then key).
`getOccurrences`	`(event, range, ctx: { timeZone }) => Array<{ start: Date; end: Date }> \| null`	-	Custom recurrence expansion per event (plug a full RRULE engine); return `null` for the built-in one.
`weekendDays`	`number[]`	`[0, 6]`	Weekday numbers treated as the weekend by the "weekends" view toggle.
`activation`	`Partial<EventCalendarActivationConfig>`	see below	Pointer-gesture tuning.

Prop	Signature	Description
`onEventClick`	`(occurrence, e: React.MouseEvent) => void`	Chip click; call `e.preventDefault()` to opt out of the built-in selection.
`onEventDoubleClick`	`(occurrence, e: React.MouseEvent) => void`	Chip double click.
`onEventUpdate`	`(update: EventCalendarProposedUpdate<TData>) => EventCalendarUpdateResult`	The one validation funnel for drags, resizes, and API timing changes; `false` rejects, an object adjusts.
`canDropEvent`	`(update: EventCalendarProposedUpdate<TData>) => boolean`	Live validation during a gesture; drives the `data-drop-invalid` styling and the not-allowed cursor.
`onDragBlocked`	`(occurrence, info: { gesture: "move" \| "resize"; reason: "readOnly" \| "disabled" \| "interactions-off" }) => void`	A gesture was attempted on a locked event; fires once per gesture so you can surface a message.
`onSlotClick`	`(slot: EventCalendarSlotInfo, e: React.MouseEvent) => void`	Click on an empty slot or day cell (also fired by the day add button).
`onSelectSlot`	`(slot: EventCalendarSlotDraft) => void`	A drag-create selection was committed.
`canSelectSlot`	`(slot: EventCalendarSlotDraft) => boolean`	Live validation of the drag-create rectangle.
`onRangeChange`	`(info: EventCalendarRangeInfo) => void`	Visible range changed (view, date, or time zone); fires once for the initial range. `info` carries `range`, `activeRange`, `view`, `date`, and `timeZone`.
`onViewChange`	`(view: CalendarView) => void`	View changed.
`onDateChange`	`(date: Date) => void`	Anchor date changed.
`onDayCountChange`	`(count: number) => void`	N-day count changed.
`onSelectionChange`	`(selection: EventCalendarSelection) => void`	Selection changed.
`onInteractionsChange`	`(interactions: EventCalendarInteractions) => void`	Interaction toggles changed.
`onViewSettingsChange`	`(viewSettings: EventCalendarViewSettings) => void`	User display toggles changed.
`onEventsChange`	`(events: CalendarEvent<TData>[]) => void`	Events array changed (drag commit, resize, API mutation).
`onMoreClick`	`(day: Date, occurrences: EventCalendarOccurrence<TData>[], e: React.MouseEvent) => void \| false`	"+N more" clicked; return `false` to suppress the built-in popover and open your own UI.

Prop	Type	Default	Description
`scrollToHour`	`number`	`7`	Hour the time grids scroll to on mount.
`nowIndicator`	`boolean`	`true`	Show the current-time line in time grids.
`interval`	`number`	`60`	Grid interval in minutes for time-based views; gutter slots and gridlines follow it. Also accepted per view component.
`maxEventsPerCell`	`number \| "auto"`	`"auto"`	Max bars plus chips per month cell before "+N more".
`showWeekNumbers`	`boolean`	`false`	Week-number gutter in the month view.
`enableShortcuts`	`boolean`	`true`	View-switcher keyboard shortcuts and their `kbd` hints.
`shortcutsScope`	`"focus-within" \| "global"`	`"focus-within"`	Where the shortcuts listen.
`scrollMode`	`"contained" \| "page"`	`"contained"`	Contained: the calendar fills its container and views scroll internally. Page: content flows with the document and day headers stick below `--ec-sticky-offset`.
`stickyNav`	`boolean`	`false`	Stick the default nav to the top while the page scrolls.
`dayClassName`	`(day: Date) => string \| undefined`	-	Custom per-day indication on month cells, day columns, and all-day cells.
`todayClassName`	`string`	-	Extra classes for the current day, appended after the built-in highlight.
`showDayAddButton`	`boolean`	`false`	Hover "+" affordance on month cells; fires the same `onSlotClick` as clicking the day.
`scrollbars`	`"custom" \| "native"`	`"custom"`	Scroll implementation for every internally scrolling surface (shadcn ScrollArea vs browser scrollbars).
`navButtonVariant`	`"ghost" \| "outline" \| "secondary" \| "default"`	`"ghost"`	Variant applied to all nav buttons.
`navButtonSize`	`"sm" \| "default"`	`"sm"`	Size applied to all nav buttons (icon buttons use the icon twin).
`offDays`	`boolean \| EventCalendarOffDaysConfig`	-	Off-day (non-working day) marking; `true` = weekends with a muted background.
`classNames`	`EventCalendarClassNames`	-	Per-element class hooks; see below.
`components`	`Partial<Record<CalendarView, ComponentType>>`	-	Swap individual view implementations.
`dayCountPresets`	`number[]`	`[5]`	N-day presets offered by the view switcher when the `days` view is enabled.
`navTooltips`	`false \| { side?, delay?, closeDelay?, timeout? }`	`{ side: "bottom", delay: 600, closeDelay: 0, timeout: 300 }`	Nav tooltips: `false` disables them all; the object tunes placement and timings.
`eventTooltip`	`boolean \| { side?, delay? }`	`false`	Styled tooltip on event hover / focus; `true` shows the event label, an object tunes side and delay. Content via `renderEventTooltip`.
`compactEventMinutes`	`number`	`45`	Timed events shorter than this render the compact single-row chip layout.
`morePopoverAlign`	`"start" \| "center" \| "end"`	`"start"`	"+N more" popover alignment against its trigger.
`nowIndicatorInterval`	`number`	`30000`	Now-indicator refresh cadence in milliseconds.
`agendaSummaryMaxDots`	`number`	`6`	Max color dots in a collapsed agenda day summary.

Prop	Signature	Description
`renderEvent`	`(props: EventCalendarRenderEventProps<TData>) => ReactNode`	Replace the chip content in grid views; receives `occurrence`, `segment`, `view`, `isDragging`, `isSelected`.
`renderAgendaEvent`	`(props: EventCalendarRenderEventProps<TData>) => ReactNode`	Replace the agenda row content.
`renderEventTooltip`	`(props: { occurrence, segment, view, label }) => ReactNode`	Content for the styled hover tooltip (`eventTooltip`); a falsy return falls back to the default label.
`renderDragPreview`	`(props: { drag: EventCalendarDragState<TData> }) => ReactNode`	Custom drag preview content.
`renderMonthCell`	`(props: { day, segments, isToday, isOutside, overflowCount, defaultContent }) => ReactNode`	Replace a month cell's body; `defaultContent` lets you wrap instead of rebuild.
`renderDayColumnBackground`	`(props: { day, boundsStartMin, boundsEndMin, totalMinutes }) => ReactNode`	Business-logic layer rendered pointer-events-none behind event segments in each day column.
`renderDayHeader`	`(props: { day, view, isToday }) => ReactNode`	Replace day header cells (month header row and time-grid headers).
`renderTimeGutterSlot`	`(props: { time, hour, minute }) => ReactNode`	Replace hour gutter labels.
`renderAllDaySection`	`(props: { days, segments }) => ReactNode`	Replace the entire all-day row of time grids.
`renderMoreIndicator`	`(props: { day, count, segments }) => ReactNode`	Replace the "+N more" trigger content.
`renderMoreContent`	`(props: { day, segments, close }) => ReactNode`	Replace the entire body of the built-in "+N more" popover while keeping its trigger and positioning.
`renderAgendaEventDetails`	`(occurrence: EventCalendarOccurrence<TData>) => ReactNode`	Agenda-only expandable details; returning a node gives the row an expand/collapse toggle.
`renderNowIndicator`	`(props: { time: Date }) => ReactNode`	Replace the current-time line.
`renderNoEvents`	`() => ReactNode`	Replace the agenda empty state.
`renderResourceHeader`	`(props: { resource: EventCalendarResource }) => ReactNode`	Resource column header content; default is `resource.title`.
`renderAgendaDayHeader`	`(props: { day, collapsed, count, toggle, defaultContent }) => ReactNode`	Replace the agenda date gutter (day badge, weekday, collapse toggle).
`renderAgendaDaySummary`	`(props: { day, occurrences, count, expand, defaultContent }) => ReactNode`	Replace the collapsed agenda day summary row content.

Property	Type	Default	Description
`drag`	`boolean`	`true`	Move events by dragging.
`resize`	`boolean`	`true`	Resize events at their edges.
`selectSlot`	`boolean`	`true`	Drag-create slot selection.

Property	Type	Default	Description
`weekends`	`boolean`	-	Show Saturday/Sunday columns in month, week, and N-day grids (effective default `true`).
`weekNumbers`	`boolean`	-	Week-number gutter in the month view (defers to `showWeekNumbers`).
`nowIndicator`	`boolean`	-	Current-time line (defers to the `nowIndicator` view config).
`offDays`	`boolean`	-	Off-day background marking (defers to the `offDays` view config).

Property	Type	Default	Description
`weekendDays`	`number[]`	`[0, 6]`	Weekday numbers treated as off (0 = Sunday).
`dates`	`Date[]`	-	Additional explicit off dates (compared by day in the display zone).
`isOffDay`	`(day: Date) => boolean`	-	Full custom predicate; runs in addition to `weekendDays` / `dates`.
`className`	`string`	`"bg-muted/40"`	Marker classes.

"use client"

import { useMemo, useRef, useState } from "react"
import {
  EventCalendar,
  type EventCalendarApi,
  type EventCalendarRenderEventProps,
} from "@/components/reui/event-calendar/event-calendar"
import { EventCalendarContent } from "@/components/reui/event-calendar/event-calendar-content"
import type { EventCalendarI18nOverrides } from "@/components/reui/event-calendar/event-calendar-i18n"
import {
  EventCalendarNav,
  EventCalendarToolbar,
} from "@/components/reui/event-calendar/event-calendar-nav"
import type {
  CalendarEvent,
  CalendarView,
  EventCalendarInteractions,
  EventCalendarResource,
  EventCalendarViewSettings,
} from "@/components/reui/event-calendar/event-calendar-types"
import {
  addDays,
  addMinutes,
  setHours,
  startOfDay,
  startOfWeek,
  type Locale,
} from "date-fns"
import { ar, de, es, fr, ja } from "date-fns/locale"

import { Avatar, AvatarFallback } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import { Card, CardContent } from "@/components/ui/card"
import { Label } from "@/components/ui/label"
import {
  Popover,
  PopoverContent,
  PopoverTrigger,
} from "@/components/ui/popover"
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"
import { Switch } from "@/components/ui/switch"
import {
  Tabs,
  TabsContent,
  TabsList,
  TabsTrigger,
} from "@/components/ui/tabs"
import { PlusIcon, Settings2Icon } from 'lucide-react'

/** Team members - passing resources unlocks the resource day view, so the
 *  view switcher offers every view the calendar ships. */
const TEAM: EventCalendarResource[] = [
  { id: "alex", title: "Alex", color: "var(--color-blue-500)" },
  { id: "mia", title: "Mia", color: "var(--color-violet-500)" },
  { id: "sam", title: "Sam", color: "var(--color-emerald-500)" },
]

/** Demo events: a balanced current week (timed, multi-day, all-day, two
 *  custom-rendered chips) plus a light scatter in the nearby weeks so the
 *  month view reads naturally without crowding any cell. */
function buildEvents(anchor: Date): CalendarEvent[] {
  const week = startOfWeek(startOfDay(anchor), { weekStartsOn: 0 })
  const at = (dayOffset: number, hour: number, minute = 0) =>
    addMinutes(setHours(addDays(week, dayOffset), hour), minute)
  const day = (dayOffset: number) => addDays(week, dayOffset)

  return [
    {
      id: "team-sync",
      title: "Team sync",
      start: at(1, 9, 0),
      end: at(1, 9, 30),
      resourceId: "alex",
    },
    {
      id: "design-review",
      title: "Design review",
      start: at(2, 11, 0),
      end: at(2, 12, 0),
      resourceId: "mia",
      color: "var(--color-violet-500)",
    },
    {
      id: "product-demo",
      title: "Product demo",
      start: at(3, 15, 0),
      end: at(3, 16, 0),
      resourceId: "sam",
      color: "var(--color-emerald-500)",
    },
    {
      id: "roadmap-planning",
      title: "Roadmap planning",
      start: at(4, 10, 0),
      end: at(4, 11, 30),
      resourceId: "alex",
      color: "var(--color-indigo-500)",
    },
    {
      id: "client-call",
      title: "Client call",
      start: at(5, 14, 0),
      end: at(5, 15, 0),
      resourceId: "mia",
      color: "var(--color-amber-500)",
    },
    {
      id: "team-offsite",
      title: "Team offsite",
      start: day(4),
      end: day(6),
      allDay: true,
      color: "var(--color-rose-500)",
    },
    {
      id: "sprint-planning",
      title: "Sprint planning",
      start: at(9, 9, 30),
      end: at(9, 10, 30),
      resourceId: "sam",
      color: "var(--color-blue-500)",
    },
    {
      id: "quarterly-review",
      title: "Quarterly review",
      start: at(17, 13, 0),
      end: at(17, 14, 30),
      resourceId: "alex",
      color: "var(--color-cyan-500)",
    },
  ]
}

/**
 * Custom chip content for a couple of events - proof that the chip is fully
 * yours to shape via `renderEvent`. Returning undefined for everything else
 * falls back to the built-in dot + title + time.
 */
function renderEventContent({ occurrence }: EventCalendarRenderEventProps) {
  const { event } = occurrence

  // Attendee avatars (real shadcn Avatar + AvatarFallback) in place of the
  // leading color dot; a thin ring-1 keeps the overlap crisp at this size.
  if (event.id === "design-review") {
    return (
      <>
        <span className="flex shrink-0 -space-x-1">
          <Avatar className="ring-background size-4 ring-1">
            <AvatarFallback className="bg-violet-500 text-[8px] font-semibold text-white">
              MJ
            </AvatarFallback>
          </Avatar>
          <Avatar className="ring-background size-4 ring-1">
            <AvatarFallback className="bg-sky-500 text-[8px] font-semibold text-white">
              AL
            </AvatarFallback>
          </Avatar>
        </span>
        <span className="truncate font-medium">{event.title}</span>
      </>
    )
  }

  // Title with a trailing status pill. The dot, title and pill share one
  // flex row so the leading dot stays glued to the label - a stacked
  // (flex-col) timed-grid chip would otherwise drop the dot onto its own line.
  if (event.id === "client-call") {
    return (
      <span className="flex w-full min-w-0 items-center gap-1.5">
        <span
          aria-hidden
          className="-me-0.5 size-1.5 shrink-0 rounded-full bg-(--ec-event-color)"
        />
        <span className="truncate font-medium">{event.title}</span>
        <span className="ms-auto shrink-0 rounded bg-(--ec-event-color)/25 px-1 text-[10px] font-semibold">
          30m
        </span>
      </span>
    )
  }

  return undefined
}

/**
 * i18n presets - each language ships a date-fns `locale` (localizes every
 * formatted date: weekday headers, month title, time gutter) plus an `i18n`
 * override map for the static UI strings the locale can't reach (Today, view
 * names, "+N more"). Arabic also flips the whole calendar to right-to-left.
 * English is the built-in default, so it leaves both undefined.
 */
interface DemoLocale {
  id: string
  /** Native language name, shown in the picker. */
  label: string
  locale: Locale | undefined
  dir: "ltr" | "rtl"
  i18n: EventCalendarI18nOverrides | undefined
}

const LOCALES: DemoLocale[] = [
  {
    id: "en",
    label: "English",
    locale: undefined,
    dir: "ltr",
    i18n: undefined,
  },
  {
    id: "de",
    label: "Deutsch",
    locale: de,
    dir: "ltr",
    i18n: {
      labels: {
        today: "Heute",
        allDay: "Ganztägig",
        noEvents: "Keine Termine",
        more: (count) => `+${count} weitere`,
      },
      viewNames: {
        month: "Monat",
        week: "Woche",
        day: "Tag",
        days: (count) => `${count} Tage`,
        agenda: "Agenda",
        resource: "Zeitraster",
      },
    },
  },
  {
    id: "fr",
    label: "Français",
    locale: fr,
    dir: "ltr",
    i18n: {
      labels: {
        today: "Aujourd'hui",
        allDay: "Journée entière",
        noEvents: "Aucun événement",
        more: (count) => `+${count} autres`,
      },
      viewNames: {
        month: "Mois",
        week: "Semaine",
        day: "Jour",
        days: (count) => `${count} jours`,
        agenda: "Agenda",
        resource: "Grille horaire",
      },
    },
  },
  {
    id: "es",
    label: "Español",
    locale: es,
    dir: "ltr",
    i18n: {
      labels: {
        today: "Hoy",
        allDay: "Todo el día",
        noEvents: "Sin eventos",
        more: (count) => `+${count} más`,
      },
      viewNames: {
        month: "Mes",
        week: "Semana",
        day: "Día",
        days: (count) => `${count} días`,
        agenda: "Agenda",
        resource: "Cuadrícula",
      },
    },
  },
  {
    id: "ja",
    label: "日本語",
    locale: ja,
    dir: "ltr",
    i18n: {
      labels: {
        today: "今日",
        allDay: "終日",
        noEvents: "予定なし",
        more: (count) => `他${count}件`,
      },
      viewNames: {
        month: "月",
        week: "週",
        day: "日",
        days: (count) => `${count}日間`,
        agenda: "予定",
        resource: "タイムグリッド",
      },
    },
  },
  {
    id: "ar",
    label: "العربية",
    locale: ar,
    dir: "rtl",
    i18n: {
      labels: {
        today: "اليوم",
        allDay: "طوال اليوم",
        noEvents: "لا توجد أحداث",
        more: (count) => `+${count} المزيد`,
      },
      viewNames: {
        month: "شهر",
        week: "أسبوع",
        day: "يوم",
        days: (count) => `${count} أيام`,
        agenda: "جدول الأعمال",
        resource: "شبكة زمنية",
      },
    },
  },
]

/** Display time zones - all event math and rendering happen in the chosen
 *  zone, so switching it visibly shifts every event's clock time. */
const TIME_ZONES: Array<{ id: string; label: string; value?: string }> = [
  { id: "local", label: "Browser" },
  { id: "ny", label: "New York", value: "America/New_York" },
  { id: "london", label: "London", value: "Europe/London" },
  { id: "tokyo", label: "Tokyo", value: "Asia/Tokyo" },
  { id: "kolkata", label: "Kolkata", value: "Asia/Kolkata" },
]

/** Everything the settings panel drives, as one resettable object. */
interface DemoSettings {
  viewSettings: EventCalendarViewSettings
  interactions: EventCalendarInteractions
  weekStartsOn: 0 | 1
  dayStartHour: number
  dayEndHour: number
  interval: number
  snapDuration: number
  eventTooltip: boolean
  showDayAddButton: boolean
  localeId: string
  timeZoneId: string
}

const DEFAULT_SETTINGS: DemoSettings = {
  viewSettings: {
    weekends: true,
    weekNumbers: false,
    nowIndicator: true,
    offDays: false,
  },
  interactions: { drag: true, resize: true, selectSlot: true },
  weekStartsOn: 0,
  dayStartHour: 0,
  dayEndHour: 24,
  interval: 60,
  snapDuration: 15,
  eventTooltip: false,
  showDayAddButton: false,
  localeId: "en",
  timeZoneId: "local",
}

function SettingsSwitch({
  id,
  label,
  checked,
  onCheckedChange,
}: {
  id: string
  label: string
  checked: boolean
  onCheckedChange: (checked: boolean) => void
}) {
  return (
    <div className="flex items-center justify-between gap-4">
      <Label htmlFor={id} className="font-normal">
        {label}
      </Label>
      <Switch id={id} checked={checked} onCheckedChange={onCheckedChange} />
    </div>
  )
}

function SettingsSelect({
  id,
  label,
  value,
  options,
  onValueChange,
}: {
  id: string
  label: string
  value: number
  options: Array<{ value: number; label: string }>
  onValueChange: (value: number) => void
}) {
  return (
    <div className="flex items-center justify-between gap-4">
      <Label htmlFor={id} className="font-normal">
        {label}
      </Label>
      <Select
        value={String(value)}
        onValueChange={(next) => onValueChange(Number(next))}
      >
        <SelectTrigger id={id} size="sm" className="w-28">
          {/* Base UI's Value renders the raw value string by default; the
              selected option's label reads better for every control here. */}
          <SelectValue>
            {options.find((option) => option.value === value)?.label}
          </SelectValue>
        </SelectTrigger>
        <SelectContent>
          {options.map((option) => (
            <SelectItem key={option.value} value={String(option.value)}>
              {option.label}
            </SelectItem>
          ))}
        </SelectContent>
      </Select>
    </div>
  )
}

/** String-keyed sibling of SettingsSelect, for the language/time-zone pickers. */
function SettingsTextSelect({
  id,
  label,
  value,
  options,
  onValueChange,
}: {
  id: string
  label: string
  value: string
  options: Array<{ value: string; label: string }>
  onValueChange: (value: string) => void
}) {
  return (
    <div className="flex items-center justify-between gap-4">
      <Label htmlFor={id} className="font-normal">
        {label}
      </Label>
      <Select value={value} onValueChange={onValueChange}>
        <SelectTrigger id={id} size="sm" className="w-36">
          {/* Base UI's Value renders the raw value string by default; the
              selected option's label reads better for every control here. */}
          <SelectValue>
            {options.find((option) => option.value === value)?.label}
          </SelectValue>
        </SelectTrigger>
        <SelectContent>
          {options.map((option) => (
            <SelectItem key={option.value} value={option.value}>
              {option.label}
            </SelectItem>
          ))}
        </SelectContent>
      </Select>
    </div>
  )
}

export function Pattern() {
  const events = useMemo(() => buildEvents(new Date()), [])
  const apiRef = useRef<EventCalendarApi | null>(null)
  const newEventCount = useRef(0)
  const [settings, setSettings] = useState<DemoSettings>(DEFAULT_SETTINGS)
  // Mirror the active view so the settings panel can show the time-grid
  // internals tab only where those options are visible (week/day/N-days and
  // the resource time grid - month and agenda render no hour track).
  const [view, setView] = useState<CalendarView>("month")
  const isTimeGridView = view !== "month" && view !== "agenda"

  const activeLocale =
    LOCALES.find((entry) => entry.id === settings.localeId) ?? LOCALES[0]
  const activeTimeZone =
    TIME_ZONES.find((entry) => entry.id === settings.timeZoneId) ??
    TIME_ZONES[0]

  const patch = (partial: Partial<DemoSettings>) =>
    setSettings((current) => ({ ...current, ...partial }))

  // Add a one-hour event at noon today and jump to it - a minimal stand-in for
  // a real "create event" dialog.
  const addEvent = () => {
    const api = apiRef.current
    if (!api) return
    const start = setHours(startOfDay(new Date()), 12)
    const end = addMinutes(start, 60)
    api.addEvent({
      id: `new-event-${newEventCount.current++}`,
      title: "New event",
      start,
      end,
      resourceId: "alex",
      color: "var(--color-blue-500)",
    })
    api.goTo(start)
  }

  return (
    <div className="w-full p-4" dir={activeLocale.dir}>
      <Card className="w-full py-0">
        <CardContent className="p-0">
          <EventCalendar
            defaultEvents={events}
            defaultView="month"
            onViewChange={setView}
            resources={TEAM}
            apiRef={apiRef}
            renderEvent={renderEventContent}
            locale={activeLocale.locale}
            i18n={activeLocale.i18n}
            timeZone={activeTimeZone.value}
            viewSettings={settings.viewSettings}
            onViewSettingsChange={(viewSettings) => patch({ viewSettings })}
            interactions={settings.interactions}
            onInteractionsChange={(interactions) => patch({ interactions })}
            weekStartsOn={settings.weekStartsOn}
            dayStartHour={settings.dayStartHour}
            dayEndHour={settings.dayEndHour}
            interval={settings.interval}
            snapDuration={settings.snapDuration}
            eventTooltip={settings.eventTooltip}
            showDayAddButton={settings.showDayAddButton}
            offDays
            className="h-[640px] w-full"
          >
            <div className="flex flex-wrap items-center gap-2 pe-2">
              <EventCalendarNav className="min-w-0 flex-1" />
              <EventCalendarToolbar>
                <Popover>
                  <PopoverTrigger
                    render={<Button variant="outline" size="sm" />}
                  >
                    <Settings2Icon  className="size-4" aria-hidden="true" />
                    Settings
                  </PopoverTrigger>
                  <PopoverContent align="end" sideOffset={8} className="w-80">
                    <Tabs defaultValue="view">
                      <TabsList className="w-full">
                        <TabsTrigger value="view" className="flex-1">
                          View
                        </TabsTrigger>
                        {/* time-grid internals only exist where an hour track
                            renders, so the tab follows the active view */}
                        {isTimeGridView && (
                          <TabsTrigger value="time" className="flex-1">
                            Time grid
                          </TabsTrigger>
                        )}
                        <TabsTrigger value="behavior" className="flex-1">
                          Behavior
                        </TabsTrigger>
                        <TabsTrigger value="region" className="flex-1">
                          Region
                        </TabsTrigger>
                      </TabsList>
                      <TabsContent value="view" className="flex flex-col gap-3">
                        <SettingsSwitch
                          id="ec-set-weekends"
                          label="Weekends"
                          checked={settings.viewSettings.weekends ?? true}
                          onCheckedChange={(weekends) =>
                            patch({
                              viewSettings: {
                                ...settings.viewSettings,
                                weekends,
                              },
                            })
                          }
                        />
                        <SettingsSwitch
                          id="ec-set-week-numbers"
                          label="Week numbers"
                          checked={settings.viewSettings.weekNumbers ?? false}
                          onCheckedChange={(weekNumbers) =>
                            patch({
                              viewSettings: {
                                ...settings.viewSettings,
                                weekNumbers,
                              },
                            })
                          }
                        />
                        <SettingsSwitch
                          id="ec-set-now"
                          label="Now indicator"
                          checked={settings.viewSettings.nowIndicator ?? true}
                          onCheckedChange={(nowIndicator) =>
                            patch({
                              viewSettings: {
                                ...settings.viewSettings,
                                nowIndicator,
                              },
                            })
                          }
                        />
                        <SettingsSwitch
                          id="ec-set-off-days"
                          label="Mark off days"
                          checked={settings.viewSettings.offDays ?? false}
                          onCheckedChange={(offDays) =>
                            patch({
                              viewSettings: {
                                ...settings.viewSettings,
                                offDays,
                              },
                            })
                          }
                        />
                        <SettingsSwitch
                          id="ec-set-day-add"
                          label="Day add button"
                          checked={settings.showDayAddButton}
                          onCheckedChange={(showDayAddButton) =>
                            patch({ showDayAddButton })
                          }
                        />
                        {/* week start shapes month and week grids alike, so
                            it lives here rather than in time-grid internals */}
                        <SettingsSelect
                          id="ec-set-week-start"
                          label="Week starts"
                          value={settings.weekStartsOn}
                          options={[
                            { value: 0, label: "Sunday" },
                            { value: 1, label: "Monday" },
                          ]}
                          onValueChange={(weekStartsOn) =>
                            patch({ weekStartsOn: weekStartsOn as 0 | 1 })
                          }
                        />
                      </TabsContent>
                      <TabsContent value="time" className="flex flex-col gap-3">
                        <SettingsSelect
                          id="ec-set-day-start"
                          label="Day starts"
                          value={settings.dayStartHour}
                          options={[
                            { value: 0, label: "00:00" },
                            { value: 6, label: "06:00" },
                            { value: 8, label: "08:00" },
                          ]}
                          onValueChange={(dayStartHour) =>
                            patch({ dayStartHour })
                          }
                        />
                        <SettingsSelect
                          id="ec-set-day-end"
                          label="Day ends"
                          value={settings.dayEndHour}
                          options={[
                            { value: 18, label: "18:00" },
                            { value: 20, label: "20:00" },
                            { value: 24, label: "24:00" },
                          ]}
                          onValueChange={(dayEndHour) => patch({ dayEndHour })}
                        />
                        <SettingsSelect
                          id="ec-set-interval"
                          label="Grid interval"
                          value={settings.interval}
                          options={[
                            { value: 30, label: "30 min" },
                            { value: 60, label: "60 min" },
                          ]}
                          onValueChange={(interval) => patch({ interval })}
                        />
                        <SettingsSelect
                          id="ec-set-snap"
                          label="Drag snap"
                          value={settings.snapDuration}
                          options={[
                            { value: 5, label: "5 min" },
                            { value: 15, label: "15 min" },
                            { value: 30, label: "30 min" },
                          ]}
                          onValueChange={(snapDuration) =>
                            patch({ snapDuration })
                          }
                        />
                      </TabsContent>
                      <TabsContent
                        value="behavior"
                        className="flex flex-col gap-3"
                      >
                        <SettingsSwitch
                          id="ec-set-drag"
                          label="Drag to move"
                          checked={settings.interactions.drag}
                          onCheckedChange={(drag) =>
                            patch({
                              interactions: { ...settings.interactions, drag },
                            })
                          }
                        />
                        <SettingsSwitch
                          id="ec-set-resize"
                          label="Drag to resize"
                          checked={settings.interactions.resize}
                          onCheckedChange={(resize) =>
                            patch({
                              interactions: {
                                ...settings.interactions,
                                resize,
                              },
                            })
                          }
                        />
                        <SettingsSwitch
                          id="ec-set-select-slot"
                          label="Drag to create"
                          checked={settings.interactions.selectSlot}
                          onCheckedChange={(selectSlot) =>
                            patch({
                              interactions: {
                                ...settings.interactions,
                                selectSlot,
                              },
                            })
                          }
                        />
                        <SettingsSwitch
                          id="ec-set-tooltip"
                          label="Event tooltips"
                          checked={settings.eventTooltip}
                          onCheckedChange={(eventTooltip) =>
                            patch({ eventTooltip })
                          }
                        />
                      </TabsContent>
                      <TabsContent
                        value="region"
                        className="flex flex-col gap-3"
                      >
                        <SettingsTextSelect
                          id="ec-set-language"
                          label="Language"
                          value={settings.localeId}
                          options={LOCALES.map((entry) => ({
                            value: entry.id,
                            label: entry.label,
                          }))}
                          onValueChange={(localeId) => patch({ localeId })}
                        />
                        <SettingsTextSelect
                          id="ec-set-timezone"
                          label="Time zone"
                          value={settings.timeZoneId}
                          options={TIME_ZONES.map((entry) => ({
                            value: entry.id,
                            label: entry.label,
                          }))}
                          onValueChange={(timeZoneId) => patch({ timeZoneId })}
                        />
                        <p className="text-muted-foreground text-xs leading-relaxed">
                          Language switches the date-fns locale and every UI
                          label. Time zone shifts all event times. Arabic also
                          flips the calendar to right-to-left.
                        </p>
                      </TabsContent>
                    </Tabs>
                    <Button
                      variant="outline"
                      size="sm"
                      className="mt-4 w-full"
                      onClick={() => setSettings(DEFAULT_SETTINGS)}
                    >
                      Reset to defaults
                    </Button>
                  </PopoverContent>
                </Popover>
                <Button size="sm" onClick={addEvent}>
                  <PlusIcon  className="size-4" aria-hidden="true" />
                  New event
                </Button>
              </EventCalendarToolbar>
            </div>
            <EventCalendarContent />
          </EventCalendar>
        </CardContent>
      </Card>
    </div>
  )
}

agendaTitle

Shadcn Event Calendar

Shadcn Event Calendar Free Components

Shadcn Event Calendar Pro Blocks

Installation

Usage

API Reference

EventCalendar

EventCalendarNav

EventCalendarNavToday

EventCalendarNavPrev

EventCalendarNavNext

EventCalendarTitle

EventCalendarViewSwitcher

EventCalendarDatePicker

EventCalendarToolbar

EventCalendarContent

EventCalendarMonthView

EventCalendarTimeGrid

EventCalendarWeekView

EventCalendarDayView

EventCalendarDaysView

EventCalendarAgendaView

EventCalendarResourceView

EventCalendarApi

CalendarEvent

EventCalendarResource

EventCalendarRecurrenceRule

EventCalendarOccurrence

EventCalendarSegment

EventCalendarProposedUpdate

EventCalendarSlotInfo

EventCalendarSlotDraft

EventCalendarState

Hooks

Helpers

Recurrence helpers

Config

State options

Callbacks

View configuration

EventCalendarInteractions

EventCalendarViewSettings

EventCalendarOffDaysConfig

Internationalization