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Description:

cr calendar

CrCalendar #
Customizable Flutter calendar inspired by Google Calendar app.
Features:

CrCalendar widget for displaying horizontally scrollable month view, with events lines over days.
date selection dialog (uses CrCalendar widget in range selection mode) with customization of buttons, texts and look of the CrCalendar widget.

Screenshots of example app:

Installation #
Add cr_calendar as a dependency in pubspec.yaml.
Then import it to your project:
import 'package:cr_calendar/src/cr_calendar.dart';

Usage of CrCalendar #
CrCalendar parameters:

Type
Name
Description
Default value

CrCalendarController
controller
Calendar controller
-

DateTime
initialDate
Initial date to be showed when calendar created
-

OnTapCallback
onDayClicked
Callback fired when calendar day is tapped in calendar with TouchMode.singleTap touch mode.
-

WeekDays
firstDayOfWeek
Sets day from which week begins
WeekDays.sunday

WeekDaysBuilder
weekDaysBuilder
Builder for customization week days row at top of the calendar widget.
-

DayItemBuilder
dayItemBuilder
Builder for customization of days cells.
-

bool
forceSixWeek
Force calendar to display sixth row in month view even if this week is not in current month.
false

Color
backgroundColor
Background color of the calendar
-

int
maxEventLines
Number of events widgets to be displayed over day item cell
4

EventBuilder
eventBuilder
Event widget builder
-

TouchMode
touchMode
Touch mode of calendar.
-

double
eventsTopPadding
Padding over events widgets to for correction of their alignment.
-

OnRangeSelectedCallback
onRangeSelected
Callback for receiving selected range when calendar is used as date picker.
-

int
onSwipeCallbackDebounceMs
Time in milliseconds for debounce CrCalendarController onSwipe callback.
-

DateTime
minDate
Earliest allowable date.
-

DateTime
maxDate
Latest allowable date.
-

Base usage:
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
CrCalendarController _controller = CrCalendarController();

@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: CrCalendar(
initialDate: DateTime.now(),
controller: _controller,
),
),
);
}
}
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Note: avoid using setState calls frequently on the page where the CrCalendar widget is used to improve performance.
Usage of CrCalendar date picker dialog #
DatePickerProperties parameters:

Type
Name
Description
Default value

Color
backgroundColor
Background color for date picker dialog and year selection widget.
Colors.white

DateTime
initialPickerDate
Initial date to be opened on dialog creation.
-

EdgeInsets
padding
Picker dialog padding.
EdgeInsets.all(8)

DayItemBuilder
dayItemBuilder
Builder for day item in dialog.
-

TouchMode
pickerMode
Picker selection mode.
-

WeekDaysBuilder
weekDaysBuilder
Builder for row of days over month view.
-

DateTitleBuilder
pickerTitleBuilder
Title builder for widget on top of picker dialog.
-

Alignment
pickerTitleAlignInLandscape
Alignment of picker title in landscape mode.
Alignment.centerLeft

Widget
backButton
Back button for picker control bar.
-

Widget
forwardButton
Forward button for picker control bar.
-

DateTitleBuilder
controlBarTitleBuilder
Builder for control bar title showed between backButton and forwardButton.
-

bool
showControlBar
Option for hiding control bar.
true

YearPickerItemBuilder
yearPickerItemBuilder
Builder for confirm selection button.
-

PickerButtonBuilder
okButtonBuilder
Builder for confirm selection button.
-

PickerButtonBuilder
cancelButtonBuilder
Builder for cancel button.
-

bool
forceSixWeek
Force showing six week rows in month view.
false

WeekDays
firstWeekDay
First day of date picker calendar.
WeekDays.sunday

DateTime
minDate
Earliest allowable date.
-

DateTime
maxDate
Latest allowable date.
-

LandscapeDaysResizeMode
landscapeDaysResizeMode
LandscapeDaysResizeMode.adaptive - days cells will change their height according to parent height LandscapeDaysResizeMode.scrollable - days cells will change their height according to parent height as long as it is larger than the cells width. The month scrolls if there is not enough space
LandscapeDaysResizeMode.adaptive

Base usage:
/// Show calendar in pop up dialog for selecting date range for calendar event.
void _showDatePicker(BuildContext context) {
showCrDatePicker(
context,
properties: DatePickerProperties(
firstWeekDay: WeekDays.monday,
okButtonBuilder: (onPress) =>
ElevatedButton(child: const Text('OK'), onPressed: onPress),
cancelButtonBuilder: (onPress) =>
OutlinedButton(child: const Text('CANCEL'), onPressed: onPress),
initialPickerDate: DateTime.now(),
),
);
}

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