A comprehensive Flutter scheduling calendar — 13 views, companion booking widgets, multi-resource scheduling, drag & drop, RRULE recurrence, iCalendar import/export, weekly shift planning.
Widget-layer only. No Material or Cupertino dependency.

Installation

Add to your pubspec.yaml:

dependencies:
  timetide: ^1.2.0

Then run:

flutter pub get

Quick Start

import 'package:timetide/timetide.dart';

final datasource = TideInMemoryDatasource(
  events: [
    TideEvent(
      id: '1',
      subject: 'Team Meeting',
      startTime: DateTime(2026, 3, 20, 10, 0),
      endTime: DateTime(2026, 3, 20, 11, 0),
    ),
  ],
);

TideCalendar(
  datasource: datasource,
  initialView: TideView.week,
)

Theming · light & dark out of the box

TideThemeData exposes 60+ visual properties. Two examples below — the same week, two different themes:

TideTheme(
  data: TideThemeData(
    primaryColor: Color(0xFF8B5CF6),
    eventBorderRadius: BorderRadius.circular(8),
    backgroundColor: Color(0xFF0E1014),
  ),
  child: TideCalendar(datasource: datasource),
)

Features

13 Calendar Views

View	Class	Description
Day	TideDayView	Single day, vertical time axis
Week	TideWeekView	7-column week layout
Work Week	TideWorkWeekView	Monday through Friday
Month	TideMonthView	Grid with event indicators
Schedule	TideScheduleView	Scrollable agenda list
Timeline Day	TideTimelineDayView	Day + horizontal resources
Timeline Week	TideTimelineWeekView	Week + horizontal resources
Timeline Work Week	TideTimelineWorkWeekView	Work week + resources
Timeline Month	TideTimelineMonthView	Month + resources
Multi-Week	TideMultiWeekView	Configurable N-week view
Year	TideYearView	12-month overview
Resource Day	TideResourceDayView	Vertical time axis with side-by-side resource columns
Resource Week	TideResourceWeekView	Week with day sub-columns per resource, two-level headers

Multi-Resource Scheduling

Assign events to rooms, people, or equipment with TideResource. Timeline views display resources as rows with synchronized scrolling. Resource Day and Resource Week views place each resource in its own column, making it easy to compare schedules at a glance.

Resource Views

Use TideView.resourceDay or TideView.resourceWeek to display all resources side by side, each with an avatar and name header. This is ideal for use cases such as a salon owner reviewing all employees' appointments simultaneously.

final resources = [
  TideResource(id: 'alice', name: 'Alice', avatarUrl: 'https://example.com/alice.jpg'),
  TideResource(id: 'bob', name: 'Bob', avatarUrl: 'https://example.com/bob.jpg'),
];

final datasource = TideInMemoryDatasource(
  events: [
    TideEvent(
      id: '1',
      subject: 'Cut & Colour',
      startTime: DateTime(2026, 3, 20, 10, 0),
      endTime: DateTime(2026, 3, 20, 11, 30),
      resourceId: 'alice',
    ),
  ],
  resources: resources,
);

TideCalendar(
  datasource: datasource,
  initialView: TideView.resourceDay,
)

Drag & Drop

Move and resize events with fully end-to-end custom gesture handling. Supported across all 7 time-based views (day, week, work week, timeline day, timeline week, timeline work week, resource day, resource week):

• Drag to reschedule — long-press on mobile, click-and-drag on desktop
• Cross-resource drag changes resourceId automatically
• Resize start/end times by dragging event edges
• Auto-scroll when dragging near viewport edges
• Snap to configurable time-grid slots
• Live conflict detection during drag
• External drag-in from a sidebar or outside the calendar via TideExternalDragScope

RRULE Recurrence

Built-in RFC 5545 RRULE parser, generator, and lazy occurrence engine:

final rule = TideRecurrence.parse('RRULE:FREQ=WEEKLY;BYDAY=MO,WE,FR');
final dates = rule!.occurrences(start: DateTime(2026, 3, 1));
final desc = rule.describe(locale: 'en'); // "Every week on Monday, Wednesday, Friday"

Visual Recurrence Editor

TideRecurrenceEditor provides a fully custom RRULE builder widget with live occurrence preview — no Material widgets required.

iCalendar Export/Import

Export events to .ics format and import iCalendar files back into the datasource. Full RFC 5545 compliance.

Custom Theming

TideThemeData provides 60+ properties for colors, typography, spacing, and more. Inject via TideTheme (InheritedWidget):

TideTheme(
  data: TideThemeData(
    primaryColor: Color(0xFF6200EE),
    eventBorderRadius: BorderRadius.circular(8),
  ),
  child: TideCalendar(datasource: datasource),
)

Localization

Built-in English and German support via TideLocalizations. Add custom locales by creating a TideLocalizations instance.

Responsive Layout

TideAdaptiveLayout + TideBreakpoints automatically switch between mobile, tablet, and desktop layouts. The same widgets adapt seamlessly:

Context Menu & Tooltip

Design-agnostic TideContextMenu (right-click/long-press) and TideTooltip (hover/long-press) — all custom, no Material.

Companion Widgets

Scheduling companion widgets for booking flows and shift planning — designed to work alongside or independently of the main calendar:

TideDateStrip

Horizontal scrollable date picker strip:

TideDateStrip(
  selectedDate: DateTime.now(),
  onDateSelected: (date) => print('Selected: $date'),
  dayCount: 14,
  showTodayIndicator: true,
)

TideSlotPicker

Time slot selection with optional resource grouping:

TideSlotPicker(
  slots: [
    TideSlot(id: '1', startTime: DateTime(2026, 4, 12, 9, 0), endTime: DateTime(2026, 4, 12, 9, 30), resourceName: 'Alice'),
    TideSlot(id: '2', startTime: DateTime(2026, 4, 12, 10, 0), endTime: DateTime(2026, 4, 12, 10, 30), resourceName: 'Bob'),
  ],
  onSlotSelected: (slot) => print('Selected: ${slot.id}'),
  groupByResource: true,
)

TideTemplateEditor

Weekly shift/schedule template editor with drag-to-create and resize:

TideTemplateEditor(
  resources: myResources,
  slots: myTemplateSlots,
  onSlotCreated: (slot) => print('Created: ${slot.id}'),
  onSlotUpdated: (slot) => print('Updated: ${slot.id}'),
  onSlotDeleted: (slot) => print('Deleted: ${slot.id}'),
  startHour: 7,
  endHour: 21,
)

TideShiftPlanner

Companion widget for week-based shift scheduling — sidebar of staff plus a 7-column week grid with drag-and-drop shift creation:

final controller = TideShiftPlannerController();

TideShiftPlanner(
  resources: staff,
  events: shifts,
  weekStart: controller.currentWeekStart,
  controller: controller,
  closedDaysOfWeek: const {DateTime.sunday},
  onShiftCreated: (event) => setState(() => shifts.add(event)),
)

Pair it with TideKwBadge to render the ISO-8601 calendar-week label inside any toolbar. Switch dragMode to ShiftDragMode.promptForTime together with a shiftPromptBuilder to surface a custom edit dialog before committing the new shift. For bulk operations call controller.copyPreviousWeek(), controller.generateMonthFromWeek(...), or controller.generateRangeFromWeek(...); these are pure functions returning fresh TideEvents for the caller to commit.

Additional hooks: cardBuilder for custom shift card rendering, shiftEditPromptBuilder paired with onShiftUpdated for active edit flows (analogous to shiftPromptBuilder + onShiftCreated for creation).

See docs/15_SHIFT_PLANNER.md for the full spec.

Architecture

• Widget-layer only: flutter/widgets.dart + gestures.dart + services.dart + rendering.dart + foundation.dart
• Monolithic package: All 13 views in a single package. Tree-shaking removes unused code.
• Custom RRULE engine: RFC 5545 parser with lazy sync* occurrence generation.
• No external dependencies beyond flutter and collection.

API Overview

Class	Purpose
TideCalendar	Main entry-point widget
TideController	Central state manager
TideDatasource	Abstract data interface
TideInMemoryDatasource	Local in-memory data
TideStreamDatasource	Reactive stream data
TideEvent	Event data model
TideResource	Resource data model
TideThemeData	Theme configuration
TideRecurrence	RRULE facade
TideRecurrenceEditor	Visual RRULE builder
TideContextMenu	Overlay context menu
TideTooltip	Overlay tooltip
TideDateStrip	Horizontal date picker strip
TideSlotPicker	Time slot selection with grouping
TideTemplateEditor	Weekly shift/schedule template editor
TideShiftPlanner	Sidebar + week-grid shift scheduling companion
TideShiftPlannerController	View-state + bulk-copy controller for shift planner
TideKwBadge	ISO-8601 calendar-week label
TideSlot	Time slot data model
TideTemplateSlot	Template slot data model
TideTimeOfDay	Widget-layer time-of-day
TideDragHandler	Core drag-and-drop orchestrator
TideResizeHandler	Event edge resize handler
TideSnapEngine	Time-grid snap logic
TideConflictDetector	Live overlap detection during drag
TideAutoScroll	Edge-scroll during drag
TideExternalDragScope	Sidebar-to-calendar external drag
TideScrollSync	Shared scroll synchronization utility

All public types use the Tide prefix for discoverability.

Brand assets

Logo, wordmark, and a vector source (SVG) live in docs/brand/ — feel free to use them in articles, integrations, or app stores that bundle timetide.

File	Use
logo-square.svg	Vector logo, scales to any size
logo-square-light.png / logo-square-dark.png	512×512 raster, light / dark backgrounds
logo-wordmark-light.png / logo-wordmark-dark.png	Logo + wordmark, 1024×320

License

MIT