calendar_view

A Flutter package allows you to easily implement all calendar UI and calendar event functionality.

For web demo visit Calendar View Example.

Preview

Installing

Add dependencies to pubspec.yaml

Get the latest version in the 'Installing' tab on pub.dev
```
dependencies:
    calendar_view: <latest-version>
```
Run pub get.
```
flutter pub get
```

Import package.

import 'package:calendar_view/calendar_view.dart';

Implementation

Wrap MaterialApp with CalendarControllerProvider and assign EventController to it.

CalendarControllerProvider(
    controller: EventController(),
    child: MaterialApp(
        // Your initialization for material app.
    ),
)

Add calendar views.

For Month View

Scaffold(
    body: MonthView(),
);

For Day View

Scaffold(
    body: DayView(),
);

For Week view

Scaffold(
    body: WeekView(),
);

For more info on properties visit documentation.

Use controller to add or remove events.

To Add event:
```
final event = CalendarEventData(
    date: DateTime(2021, 8, 10);
    event: "Event 1",
);

CalendarControllerProvider.of(context).controller.add(event);
```
To Remove event:
```
CalendarControllerProvider.of(context).controller.remove(event);
```
As soon as you add or remove events from the controller, it will automatically update the calendar view assigned to that controller. See, Use of EventController for more info
Use GlobalKey to change the page or jump to a specific page or date. See, Use of GlobalKey for more info.

More on the calendar view

Optional configurations/parameters in Calendar view

For month view

MonthView(
    controller: EventController(),
    // to provide custom UI for month cells.
    cellBuilder: (date, events, isToday, isInMonth) {
        // Return your widget to display as month cell.
        return Container();
    },
    minMonth: DateTime(1990),
    maxMonth: DateTime(2050),
    initialMonth: DateTime(2021),
    cellAspectRatio: 1,
    onPageChange: (date, pageIndex) => print("$date, $pageIndex"),
    onCellTap: (events, date) {
        // Implement callback when user taps on a cell.
        print(events);
    }
    // This callback will only work if cellBuilder is null.
    onEventTap: (event, date) => print(event);
);

For day view

DayView(
    controller: EventController(),
    eventTileBuilder: (date, events, boundry, start, end) {
        // Return your widget to display as event tile.
        return Container();
    },
    showVerticalLine: true, // To display live time line in day view.
    showLiveTimeLineInAllDays: true, // To display live time line in all pages in day view.
    minMonth: DateTime(1990),
    maxMonth: DateTime(2050),
    initialMonth: DateTime(2021),
    heightPerMinute: 1, // height occupied by 1 minute time span.
    eventArranger: SideEventArranger(), // To define how simultaneous events will be arranged.
    onEventTap: (events, date) => print(events),
);

For week view

WeekView(
    controller: EventController(),
    eventTileBuilder: (date, events, boundry, start, end) {
        // Return your widget to display as event tile.
        return Container();
    },
    showLiveTimeLineInAllDays: true, // To display live time line in all pages in week view.
    width: 400, // width of week view.
    minMonth: DateTime(1990),
    maxMonth: DateTime(2050),
    initialMonth: DateTime(2021),
    heightPerMinute: 1, // height occupied by 1 minute time span.
    eventArranger: SideEventArranger(), // To define how simultaneous events will be arranged.
    onEventTap: (events, date) => print(events),
);

To see the list of all parameters and detailed description of parameters visit documentation.

Use of `EventController`

EventController is used to add or remove events from the calendar view. When we add or remove events from the controller, it will automatically update all the views to which this controller is assigned.

Methods provided by EventController

Name	Parameters	Description
add	CalendarEventData<T> event	Adds one event in controller and rebuilds view.
addAll	List<CalendarEventData<T>> events	Adds list of events in controller and rebuilds view.
remove	CalendarEventData<T> event	Removes an event from controller and rebuilds view.
getEventsOnDay	DateTime date	Returns list of events on `date`

Use of `GlobalKey`

User needs to define global keys to access functionalities like changing a page or jump to a specific page or date. Users can also access the controller assigned to respected view using the global key.

By assigning global keys to calendar views you can access methods and fields defined by state class of respected views.

Methods defined by MonthViewState class:

Name	Parameters	Description
nextPage	none	Jumps to next page.
previousPage	none	Jumps to the previous page.
jumpToPage	int page	Jumps to page index defined by `page`.
animateToPage	int page	Animate to page index defined by `page`.
jumpToMonth	DateTime month	Jumps to the page that has a calendar for month defined by `month`
animateToMonth	DateTime month	Animate to the page that has a calendar for month defined by `month`

Methods defined by DayViewState class.

Name	Parameters	Description
nextPage	none	Jumps to next page.
previousPage	none	Jumps to the previous page.
jumpToPage	int page	Jumps to page index defined by `page`.
animateToPage	int page	Animate to page index defined by `page`.
jumpToDate	DateTime date	Jumps to the page that has a calendar for month defined by `date`
animateToDate	DateTime date	Animate to the page that has a calendar for month defined by `date`

Methods defined by WeekViewState class.

Name	Parameters	Description
nextPage	none	Jumps to next page.
previousPage	none	Jumps to the previous page.
jumpToPage	int page	Jumps to page index defined by `page`.
animateToPage	int page	Animate to page index defined by `page`.
jumpToWeek	DateTime week	Jumps to the page that has a calendar for month defined by `week`
animateToWeek	DateTime week	Animate to the page that has a calendar for month defined by `week`

Synchronize events between calendar views

There are two ways to synchronize events between calendar views.

Provide the same controller object to all calendar views used in the project.
Wrap MaterialApp with CalendarControllerProvider and provide controller as argument as defined in Implementation.

License

MIT License

Copyright (c) 2021 Simform Solutions

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

DevarshRanpara/flutter_calendar_view