Flutter自定义日历插件flutter_customizable_calendar的使用
Flutter自定义日历插件flutter_customizable_calendar的使用
flutter_customizable_calendar
是一个功能丰富的Flutter包,提供高度可定制的日历视图,支持显示天、周和月。它允许开发者自定义日历的外观,并支持事件和休息时间的添加、动态编辑和删除。
主要特点
- 多种视图:提供了三种主要视图:
DaysView
、WeekView
、MonthView
和ScheduleListView
,每种视图对应不同的时间段。 - 自定义:用户可以通过不同的组件主题(如
DaysListTheme
、TimelineTheme
等)轻松自定义日历的外观。 - 动态事件编辑:支持在每个视图中动态编辑事件,利用回调函数(如
onEventUpdated
和onDiscardChanges
)可以无缝更新或丢弃对事件所做的更改。 - 事件类型:支持多种事件类型,包括
SimpleEvent
、TaskDue
和Break
。可以创建自己的扩展相应抽象事件类的事件类型。 - 动态添加事件:用户可以动态添加事件。示例代码展示了如何使用底部弹出框和
onDateLongPress
回调实现此功能。 - 完整示例:该包附带了一个完整的示例应用程序,演示了其用法和特性。示例代码可以在GitHub上找到。
开始使用
添加依赖
首先,在 pubspec.yaml
文件中添加以下依赖:
dependencies:
flutter_customizable_calendar: ^0.3.7
然后运行:
$ flutter pub get
使用示例
动态添加事件
下面的代码片段展示了如何处理 DaysView
中的日期长按事件并动态添加不同类型的事件,例如简单事件、任务到期和休息时间。
import 'package:flutter/material.dart';
import 'package:flutter_customizable_calendar/flutter_customizable_calendar.dart';
Future<CalendarEvent?> _onDateLongPress(DateTime timestamp) async {
final _minute = timestamp.minute;
return await showModalBottomSheet(
context: context,
builder: (context) => Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
const SizedBox(height: 32),
ListTile(
title: Text("Simple Event"),
onTap: () {
final SimpleEvent newItem = SimpleEvent(
id: const Uuid().v1(),
start: timestamp.subtract(Duration(minutes: _minute)),
duration: Duration(hours: 1),
title: "Simple event",
);
listCubit.save(newItem);
Navigator.of(context).pop(newItem);
},
),
ListTile(
title: Text("Task Due"),
onTap: () {
final TaskDue newItem = TaskDue(
id: const Uuid().v1(),
start: timestamp.subtract(Duration(minutes: _minute)),
);
listCubit.save(newItem);
Navigator.of(context).pop(newItem);
},
),
ListTile(
title: Text("Break"),
onTap: () {
final Break newItem = Break(
id: const Uuid().v1(),
start: timestamp.subtract(Duration(minutes: _minute)),
duration: Duration(hours: 1),
);
listCubit.save(newItem);
Navigator.of(context).pop(newItem);
},
),
],
),
);
}
DaysView<T>(
//...
onDateLongPress: _onDateLongPress,
)
WeekView<T>(
//...
onDateLongPress: _onDateLongPress,
)
MonthView<T>(
//...
onDateLongPress: _onDateLongPress,
)
动态编辑事件
通过利用提供的回调函数(如 onEventUpdated
和 onDiscardChanges
),可以轻松地在日历视图中动态编辑事件。
void save(CalendarEvent event) {
if (event is Break) {
emit(state.copyWith(breaks: state.breaks..[event.id] = event));
}
if (event is FloatingCalendarEvent) {
emit(state.copyWith(events: state.events..[event.id] = event));
}
}
DaysView<T>(
//...
onEventUpdated: (obj) {
print(obj);
context.read<ListCubit>().save(obj);
},
onDiscardChanges: (obj) {
print(obj);
},
)
WeekView<T>(
//...
onEventTap: print,
onEventUpdated: (obj) {
print(obj);
context.read<ListCubit>().save(obj);
},
onDiscardChanges: (obj) {
print(obj);
},
);
MonthView<T>(
//...
onEventTap: print,
onEventUpdated: (obj) {
print(obj);
context.read<ListCubit>().save(obj);
},
onDiscardChanges: (obj) {
print(obj);
},
);
全天事件
该包支持 DaysView
和 WeekView
的全天事件。以下代码片段展示了如何创建一个全天事件:
SimpleAllDayEvent(
id: 'All-day 1',
start: today,
duration: const Duration(days: 2),
title: 'Event 1',
color: Colors.redAccent.shade200,
)
DaysView<T>(
//...
events: [
SimpleAllDayEvent(
id: 'All-day 1',
start: today,
duration: const Duration(days: 2),
title: 'Event 1',
color: Colors.redAccent.shade200,
),
],
)
WeekView<T>(
//...
events: [
SimpleAllDayEvent(
id: 'All-day 1',
start: today,
duration: const Duration(days: 2),
title: 'Event 1',
color: Colors.redAccent.shade200,
),
],
)
自定义事件
为了创建自定义事件,需要扩展 EditableCalendarEvent
类。以下代码片段展示了如何创建带有图像背景的自定义事件:
class EventWithLabel extends EditableCalendarEvent {
EventWithLabel({
required super.id,
required super.start,
required super.duration,
required this.title,
required this.label,
});
final String title;
final EventLabel label;
[@override](/user/override)
EditableCalendarEvent copyWith({DateTime? start, Duration? duration}) {
return EventWithLabel(
id: id,
start: start ?? this.start,
duration: duration ?? this.duration,
label: label,
title: title,
);
}
}
Row _buildEventWithLabel(
CalendarEvent data, {
bool allDay = false,
}) {
final event = data as EventWithLabel;
return Row(
children: [
Container(
width: 4,
decoration: BoxDecoration(
color: event.label.color,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(4),
bottomLeft: Radius.circular(4),
),
),
),
Expanded(
child: Container(
height: double.maxFinite,
decoration: BoxDecoration(
color: event.label.color.withOpacity(0.25),
borderRadius: BorderRadius.circular(allDay ? 2 : 4),
),
padding: EdgeInsets.all(allDay ? 2 : 8),
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Expanded(
child: Text(
event.title,
style: const TextStyle(
fontSize: 16,
fontWeight: FontWeight.w500,
),
overflow: TextOverflow.ellipsis,
),
),
],
),
),
),
],
);
}
完整示例应用
以下是完整的示例应用,展示了如何使用 flutter_customizable_calendar
包的不同视图。
import 'package:flutter/material.dart';
import 'package:flutter_customizable_calendar/flutter_customizable_calendar.dart';
void main() => runApp(const App());
class App extends StatelessWidget {
const App({super.key});
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter customizable calendar',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
scaffoldBackgroundColor: Colors.blue.shade50,
),
home: HomePage(),
);
}
}
class HomePage extends StatelessWidget {
const HomePage({super.key});
[@override](/user/override)
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Flutter customizable calendar'),
),
body: ListView(
children: [
ListTile(
title: const Text('MonthView + ScheduleListView'),
onTap: () => Navigator.of(context).push(
MaterialPageRoute(builder: (context) => MonthViewWithScheduleListViewPage()),
),
),
ListTile(
title: const Text("ScheduleListView + DaysView"),
onTap: () => Navigator.of(context).push(
MaterialPageRoute(builder: (context) => ScheduleListViewWithDaysView()),
),
),
ListTile(
title: const Text("WeekView"),
onTap: () => Navigator.of(context).push(
MaterialPageRoute(builder: (context) => WeekViewPage()),
),
),
],
),
);
}
}
更多关于Flutter自定义日历插件flutter_customizable_calendar的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter自定义日历插件flutter_customizable_calendar的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,以下是一个关于如何使用 flutter_customizable_calendar
插件的示例代码。这个插件允许你创建一个高度可定制的日历视图。
首先,确保你已经在 pubspec.yaml
文件中添加了 flutter_customizable_calendar
依赖:
dependencies:
flutter:
sdk: flutter
flutter_customizable_calendar: ^x.y.z # 请替换为最新版本号
然后运行 flutter pub get
来安装依赖。
接下来是一个简单的示例,展示如何使用 flutter_customizable_calendar
插件:
import 'package:flutter/material.dart';
import 'package:flutter_customizable_calendar/flutter_customizable_calendar.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Customizable Calendar Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: CalendarScreen(),
);
}
}
class CalendarScreen extends StatefulWidget {
@override
_CalendarScreenState createState() => _CalendarScreenState();
}
class _CalendarScreenState extends State<CalendarScreen> {
final CalendarController _controller = CalendarController();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Customizable Calendar'),
),
body: Padding(
padding: const EdgeInsets.all(8.0),
child: CustomizableCalendar(
controller: _controller,
firstDayOfWeek: DayOfWeek.monday,
headerStyle: CalendarHeaderStyle(
titleTextStyle: TextStyle(fontSize: 24, color: Colors.black),
dayOfWeekTextStyle: TextStyle(fontSize: 16, color: Colors.grey),
),
eventStyle: CalendarEventStyle(
dotColor: Colors.blue,
dotContainerDecoration: BoxDecoration(
shape: BoxShape.circle,
color: Colors.white,
border: Border.all(color: Colors.blue, width: 2),
),
),
selectedDayStyle: CalendarSelectedDayStyle(
backgroundColor: Colors.blue.withOpacity(0.3),
textStyle: TextStyle(color: Colors.white, fontSize: 18),
),
todayStyle: CalendarTodayStyle(
backgroundColor: Colors.red.withOpacity(0.3),
textStyle: TextStyle(color: Colors.white, fontSize: 18),
),
calendarFormat: CalendarFormat.month,
events: _getEvents(),
onDaySelected: (date, events) {
print('Selected date: $date, events: $events');
},
onTodayPressed: () {
print('Today button pressed');
},
onVisibleDaysChanged: (firstVisible, lastVisible) {
print('Visible days range changed: $firstVisible - $lastVisible');
},
),
),
);
}
List<CalendarEvent> _getEvents() {
return [
CalendarEvent(
date: DateTime(2023, 10, 5),
title: 'Event 1',
description: 'This is the first event.',
),
CalendarEvent(
date: DateTime(2023, 10, 15),
title: 'Event 2',
description: 'This is the second event.',
),
// 添加更多事件...
];
}
}
class CalendarEvent {
final DateTime date;
final String title;
final String description;
CalendarEvent({required this.date, required this.title, required this.description});
}
代码说明
- 依赖管理:在
pubspec.yaml
文件中添加flutter_customizable_calendar
依赖。 - 主应用:
MyApp
类定义了应用的主入口。 - 日历屏幕:
CalendarScreen
类是一个有状态的组件,包含主要的日历逻辑。 - 控制器:使用
CalendarController
来管理日历的状态。 - 样式定制:通过
CalendarHeaderStyle
,CalendarEventStyle
,CalendarSelectedDayStyle
, 和CalendarTodayStyle
类来自定义日历的不同部分。 - 事件数据:
_getEvents
方法返回一个事件列表,这些事件将在日历上显示。 - 事件回调:
onDaySelected
,onTodayPressed
, 和onVisibleDaysChanged
回调用于处理用户交互。
你可以根据需要进一步定制和扩展这个示例,例如添加更多的事件、修改样式或者处理更多的用户交互。