flutter 手写日历组件

先看效果

 直接上代码

calendar_popup_view.dart

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';import 'custom_calendar.dart';
import 'hotel_app_theme.dart';class CalendarPopupView extends StatefulWidget {const CalendarPopupView({required this.initialStartDate,required this.initialEndDate,required this.onApplyClick,required this.onCancelClick,required this.state,this.minimumDate,this.maximumDate,this.barrierDismissible = true,super.key,});final DateTime? minimumDate;final DateTime? maximumDate;final bool barrierDismissible;final DateTime initialStartDate;final DateTime initialEndDate;final Function(DateTime, DateTime) onApplyClick;final Function onCancelClick;final Function state;@overrideState<CalendarPopupView> createState() => _CalendarPopupViewState();
}class _CalendarPopupViewState extends State<CalendarPopupView>with TickerProviderStateMixin {late DateTime startDate;late DateTime endDate;late final AnimationController animationController;late DateTime curSelectStartData;late DateTime curSelectEndData;@overridevoid initState() {super.initState();animationController = AnimationController(duration: const Duration(milliseconds: 400), vsync: this);startDate = widget.initialStartDate;endDate = widget.initialEndDate;curSelectStartData = startDate;curSelectEndData = endDate;animationController.forward();}@overridevoid dispose() {animationController.dispose();super.dispose();}@overrideWidget build(BuildContext context) {return AnimatedBuilder(animation: animationController,builder: (BuildContext context, _) {return AnimatedOpacity(duration: const Duration(milliseconds: 100),opacity: animationController.value,child: InkWell(splashColor: Colors.transparent,focusColor: Colors.transparent,highlightColor: Colors.transparent,hoverColor: Colors.transparent,onTap: () {if (widget.barrierDismissible) {Navigator.pop(context);}},child: Container(decoration: BoxDecoration(color: HotelAppTheme.buildLightTheme().colorScheme.background,borderRadius: const BorderRadius.all(Radius.circular(24.0)),boxShadow: <BoxShadow>[BoxShadow(color: Colors.grey.withOpacity(0.2),offset: const Offset(4, 4),blurRadius: 8.0),],),child: Column(mainAxisAlignment: MainAxisAlignment.center,crossAxisAlignment: CrossAxisAlignment.start,mainAxisSize: MainAxisSize.min,children: <Widget>[Row(children: <Widget>[Expanded(child: Column(mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[Text('From',textAlign: TextAlign.left,style: grayTitle(),),const SizedBox(height: 4,),Text(DateFormat('EEE, dd MMM').format(curSelectStartData),style:curSelectStartData == widget.initialStartDate? grayTime(): primaryTime(),),],),),Container(height: 74,width: 1,color: HotelAppTheme.buildLightTheme().dividerColor,),Expanded(child: Column(mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[Text('To',style: grayTitle(),),const SizedBox(height: 4),Text(DateFormat('EEE, dd MMM').format(curSelectEndData),style: curSelectEndData == widget.initialEndDate? grayTime(): primaryTime(),),],),)],),const Divider(height: 1),CustomCalendarView(minimumDate: widget.minimumDate,maximumDate: widget.maximumDate,initialEndDate: widget.initialEndDate,initialStartDate: widget.initialStartDate,startEndDateChange:(DateTime startDateData, DateTime endDateData) {if (mounted) {setState(() {startDate = startDateData;endDate = endDateData;curSelectStartData = startDateData;curSelectEndData = endDateData;});toUpdateState();}},endDateChange: (DateTime endData) {print("endDateChange");setState(() {endDate = endData;curSelectEndData = endData;});toUpdateState();},startDateChange: (DateTime startData) {print("startDateChange");setState(() {startDate = startData;curSelectStartData = startData;});toUpdateState();}),Padding(padding: const EdgeInsets.only(left: 16, right: 16, bottom: 16, top: 8),child: Container(height: 48,decoration: BoxDecoration(color: HotelAppTheme.buildLightTheme().primaryColor,borderRadius:const BorderRadius.all(Radius.circular(24.0)),boxShadow: <BoxShadow>[BoxShadow(color: Colors.grey.withOpacity(0.6),blurRadius: 8,offset: const Offset(4, 4),),],),child: Material(color: Colors.transparent,child: InkWell(borderRadius:const BorderRadius.all(Radius.circular(24.0)),highlightColor: Colors.transparent,onTap: () {try {// animationController?.reverse().then((f) {// });widget.onApplyClick(startDate, endDate);Navigator.pop(context);} catch (_) {}},child: const Center(child: Text('Apply',style: TextStyle(fontWeight: FontWeight.w500,fontSize: 18,color: Colors.white),),),),),),)],),),),);},);}toUpdateState() {widget.state(() {});}TextStyle grayTitle() {return const TextStyle(fontWeight: FontWeight.w100,fontSize: 16,color: Color(0xff676970),);}TextStyle grayTime() {return const TextStyle(fontWeight: FontWeight.bold,fontSize: 16,color: Color(0xff45474D),);}TextStyle primaryTime() {return TextStyle(fontWeight: FontWeight.bold,fontSize: 16,color: HotelAppTheme.buildLightTheme().primaryColorDark,);}
}

custom_calendar.dart

import 'package:app/common/util/k_date_util.dart';
import 'package:app/common/util/k_log_util.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:intl/intl.dart';import 'hotel_app_theme.dart';class CustomCalendarView extends StatefulWidget {const CustomCalendarView({required this.initialStartDate,required this.initialEndDate,required this.startEndDateChange,required this.startDateChange,required this.endDateChange,this.minimumDate,this.maximumDate,super.key,});final DateTime? minimumDate;final DateTime? maximumDate;final DateTime initialStartDate;final DateTime initialEndDate;final Function(DateTime, DateTime) startEndDateChange;final Function(DateTime) startDateChange;final Function(DateTime) endDateChange;@overrideState<CustomCalendarView> createState() => _CustomCalendarViewState();
}class _CustomCalendarViewState extends State<CustomCalendarView> {List<DateTime> dateList = <DateTime>[];DateTime currentMonthDate = DateTime.now();DateTime? startDate;DateTime? endDate;@overridevoid initState() {super.initState();setListOfDate(currentMonthDate);startDate = widget.initialStartDate;endDate = widget.initialEndDate;}@overridevoid dispose() {super.dispose();}void setListOfDate(DateTime monthDate) {dateList.clear();final DateTime newDate = DateTime(monthDate.year, monthDate.month, 0);int previousMothDay = 0;if (newDate.weekday < 7) {previousMothDay = newDate.weekday;for (int i = 1; i <= previousMothDay; i++) {dateList.add(newDate.subtract(Duration(days: previousMothDay - i)));}}for (int i = 0; i < (42 - previousMothDay); i++) {dateList.add(newDate.add(Duration(days: i + 1)));}// if (dateList[dateList.length - 7].month != monthDate.month) {//   dateList.removeRange(dateList.length - 7, dateList.length);// }}@overrideWidget build(BuildContext context) {return Container(child: Column(children: <Widget>[Padding(padding:const EdgeInsets.only(left: 8.0, right: 8.0, top: 4, bottom: 4),child: Row(children: <Widget>[Padding(padding: const EdgeInsets.all(8.0),child: Container(height: 38,width: 38,decoration: BoxDecoration(borderRadius:const BorderRadius.all(Radius.circular(24.0)),border: Border.all(color: HotelAppTheme.buildLightTheme().dividerColor,),),child: InkWell(borderRadius:const BorderRadius.all(Radius.circular(24.0)),onTap: () {if (mounted) {setState(() {if (getCurMonthIsInMinMaxRange(DateTime(currentMonthDate.year,currentMonthDate.month,0))) {currentMonthDate = DateTime(currentMonthDate.year,currentMonthDate.month, 0);setListOfDate(currentMonthDate);}});}},child: const Icon(Icons.keyboard_arrow_left,color: Colors.grey,),),),),Expanded(child: Center(child: Text(DateFormat('MMMM, yyyy').format(currentMonthDate),style: TextStyle(fontWeight: FontWeight.w500,fontSize: 15.sp,color: Colors.white,),),),),Padding(padding: const EdgeInsets.all(8.0),child: Container(height: 38,width: 38,decoration: BoxDecoration(borderRadius:const BorderRadius.all(Radius.circular(24.0)),border: Border.all(color: HotelAppTheme.buildLightTheme().dividerColor,),),child: InkWell(borderRadius:const BorderRadius.all(Radius.circular(24.0)),onTap: () {if (mounted) {setState(() {if (getCurMonthIsInMinMaxRange(DateTime(currentMonthDate.year,currentMonthDate.month + 2,0))) {currentMonthDate = DateTime(currentMonthDate.year,currentMonthDate.month + 2, 0);setListOfDate(currentMonthDate);}});}},child: const Icon(Icons.keyboard_arrow_right,color: Colors.grey,),),),),],),),Padding(padding: const EdgeInsets.only(right: 8, left: 8, bottom: 8),child: Row(children: getDaysNameUI(),),),Padding(padding: const EdgeInsets.only(right: 8, left: 8),child: Column(children: getDaysNoUI(),),),],),);}List<Widget> getDaysNameUI() {final List<Widget> listUI = <Widget>[];final weekendList = [5, 6];for (int i = 0; i < 7; i++) {listUI.add(Expanded(child: Center(child: Text(DateFormat('EEE').format(dateList[i]),style: TextStyle(fontSize: 14.sp,fontWeight: FontWeight.w500,color: weekendList.contains(i)? HotelAppTheme.buildLightTheme().primaryColorDark: Colors.white,),),),),);}return listUI;}List<Widget> getDaysNoUI() {final List<Widget> noList = <Widget>[];int count = 0;for (int i = 0; i < dateList.length / 7; i++) {final List<Widget> listUI = <Widget>[];for (int i = 0; i < 7; i++) {final DateTime date = dateList[count];listUI.add(Expanded(child: AspectRatio(aspectRatio: 1.0,child: Stack(children: <Widget>[Padding(padding: const EdgeInsets.only(top: 3, bottom: 3),child: Padding(padding: EdgeInsets.only(top: 0,bottom: 0,left: isStartDateRadius(date) ? 4 : 0,right: isEndDateRadius(date) ? 4 : 0),child: Container(decoration: BoxDecoration(color: startDate != null && endDate != null? getIsItStartAndEndDate(date) ||getIsInRange(date)? HotelAppTheme.buildLightTheme().primaryColorDark.withOpacity(0.1): Colors.transparent: Colors.transparent,borderRadius: BorderRadius.only(bottomLeft: isStartDateRadius(date)? Radius.circular(15.r): const Radius.circular(0.0),topLeft: isStartDateRadius(date)? Radius.circular(15.r): const Radius.circular(0.0),topRight: isEndDateRadius(date)? Radius.circular(15.r): const Radius.circular(0.0),bottomRight: isEndDateRadius(date)? Radius.circular(15.r): const Radius.circular(0.0),),),),),),InkWell(borderRadius: const BorderRadius.all(Radius.circular(32.0)),onTap: () {if (currentMonthDate.month == date.month) {final DateTime? minimumDate = widget.minimumDate;final DateTime? maximumDate = widget.maximumDate;if (minimumDate != null && maximumDate != null) {final DateTime newminimumDate = DateTime(minimumDate.year,minimumDate.month,minimumDate.day - 1);final DateTime newmaximumDate = DateTime(maximumDate.year,maximumDate.month,maximumDate.day + 1);if (date.isAfter(newminimumDate) &&date.isBefore(newmaximumDate)) {onDateClick(date);}} else if (minimumDate != null) {final DateTime newminimumDate = DateTime(minimumDate.year,minimumDate.month,minimumDate.day - 1);if (date.isAfter(newminimumDate)) {onDateClick(date);}} else if (maximumDate != null) {final DateTime newmaximumDate = DateTime(maximumDate.year,maximumDate.month,maximumDate.day + 1);if (date.isBefore(newmaximumDate)) {onDateClick(date);}} else {onDateClick(date);}}},child: Padding(padding: const EdgeInsets.all(2),child: Container(decoration: BoxDecoration(color: getIsItStartAndEndDate(date)? HotelAppTheme.buildLightTheme().primaryColorDark: Colors.transparent,borderRadius: getStartOrEndPoint(date),// border: Border.all(//   color: getIsItStartAndEndDate(date)//       ? Colors.white//       : Colors.transparent,//   width: 2,// ),// boxShadow: getIsItStartAndEndDate(date)//     ? <BoxShadow>[//         BoxShadow(//             color: Colors.grey.withOpacity(0.6),//             blurRadius: 4),//       ]//     : null,),child: Center(child: Text('${date.day}',style: ceilStyle(date),),),),),),Positioned(bottom: 9,right: 0,left: 0,child: Container(height: 6,width: 6,decoration: BoxDecoration(color: DateTime.now().day == date.day &&DateTime.now().month == date.month &&DateTime.now().year == date.year? getIsInRange(date)? Colors.white: HotelAppTheme.buildLightTheme().primaryColorDark: Colors.transparent,shape: BoxShape.circle),),),],),),),);count += 1;}noList.add(Row(mainAxisAlignment: MainAxisAlignment.center,mainAxisSize: MainAxisSize.min,children: listUI,));}return noList;}BorderRadius getStartOrEndPoint(DateTime date) {KLogUtil.log([startDate, endDate, KDateUtils.isSome(startDate, endDate)]);if (startDate.toString() == endDate.toString()) {return BorderRadius.all(Radius.circular(15.r),);} else if (getIsItStart(date)) {return BorderRadius.only(topLeft: Radius.circular(15.r),bottomLeft: Radius.circular(15.r),);} else {return BorderRadius.only(topRight: Radius.circular(15.r),bottomRight: Radius.circular(15.r),);}}// 日期每一格的样式TextStyle ceilStyle(DateTime date) {// 不能选择日期的样式if (!getIsInMinMaxRange(date)) {return TextStyle(color: Colors.grey.withOpacity(0.6),fontSize: MediaQuery.of(context).size.width > 360 ? 14.sp : 16.sp,fontWeight:getIsItStartAndEndDate(date) ? FontWeight.bold : FontWeight.normal,);}return TextStyle(color: getIsItStartAndEndDate(date) || getIsInRange(date)? Colors.white: currentMonthDate.month == date.month? Colors.white: Colors.grey.withOpacity(0.6),fontSize: MediaQuery.of(context).size.width > 360 ? 14.sp : 16.sp,fontWeight:getIsItStartAndEndDate(date) ? FontWeight.bold : FontWeight.normal);}bool getIsInMinMaxRange(DateTime date) {if (widget.minimumDate != null && widget.maximumDate != null) {if (date.isAfter(widget.minimumDate!) &&date.isBefore(widget.maximumDate!)) {return true;}}return false;}// 当前月份是否在bool getCurMonthIsInMinMaxRange(DateTime tgtMonth) {if (widget.minimumDate != null && widget.maximumDate != null) {if (tgtMonth.isAfter(DateTime(widget.minimumDate!.year, widget.minimumDate!.month, 0)) &&tgtMonth.isBefore(DateTime(widget.maximumDate!.year, widget.maximumDate!.month + 2, 0))) {return true;}}return false;}bool getIsInRange(DateTime date) {if (startDate != null && endDate != null) {if (date.isAfter(startDate!) && date.isBefore(endDate!)) {return true;}}return false;}bool getIsItStartAndEndDate(DateTime date) {if ((startDate != null &&startDate!.day == date.day &&startDate!.month == date.month &&startDate!.year == date.year) ||(endDate != null &&endDate!.day == date.day &&endDate!.month == date.month &&endDate!.year == date.year)) return true;return false;}bool getIsItStart(DateTime date) {if (startDate != null &&startDate!.day == date.day &&startDate!.month == date.month &&startDate!.year == date.year) return true;return false;}bool isStartDateRadius(DateTime date) {if (startDate != null &&startDate!.day == date.day &&startDate!.month == date.month) {return true;} else if (date.weekday == 1) {return true;} else {return false;}}bool isEndDateRadius(DateTime date) {if (endDate != null &&endDate!.day == date.day &&endDate!.month == date.month) {return true;} else if (date.weekday == 7) {return true;} else {return false;}}void onDateClick(DateTime date) {if (startDate == null) {startDate = date;} else if (startDate != date && endDate == null) {endDate = date;} else if (startDate!.day == date.day && startDate!.month == date.month) {// startDate = null;endDate = startDate;} else if (endDate != null &&endDate!.day == date.day &&endDate!.month == date.month) {if (endDate != null) {startDate = endDate;} else {endDate = null;}}if (startDate == null && endDate != null) {startDate = endDate;endDate = null;}if (startDate != null && endDate != null) {if (!endDate!.isAfter(startDate!)) {final DateTime d = startDate!;startDate = endDate;endDate = d;}if (date.isBefore(startDate!)) {startDate = date;} else if (date.isAfter(endDate!)) {endDate = date;} else {final int daysToStartDate = startDate!.difference(date).inDays.abs();final int daysToEndDate = endDate!.difference(date).inDays.abs();daysToStartDate > daysToEndDate ? endDate = date : startDate = date;}}if (mounted) {setState(() {if (startDate != null && endDate != null) {try {widget.startEndDateChange(startDate!, endDate!);} catch (_) {}}if (startDate != null) {try {widget.startDateChange(startDate!);} catch (_) {}}if (endDate != null) {try {widget.endDateChange(endDate!);} catch (_) {}}},);}}
}

hotel_app_theme.dart

import 'package:flutter/material.dart';class HotelAppTheme {static TextTheme _buildTextTheme(TextTheme base) {const String fontName = 'WorkSans';return base.copyWith(displayLarge: base.displayLarge?.copyWith(fontFamily: fontName),displayMedium: base.displayMedium?.copyWith(fontFamily: fontName),displaySmall: base.displaySmall?.copyWith(fontFamily: fontName),headlineMedium: base.headlineMedium?.copyWith(fontFamily: fontName),headlineSmall: base.headlineSmall?.copyWith(fontFamily: fontName),titleLarge: base.titleLarge?.copyWith(fontFamily: fontName),labelLarge: base.labelLarge?.copyWith(fontFamily: fontName),bodySmall: base.bodySmall?.copyWith(fontFamily: fontName),bodyLarge: base.bodyLarge?.copyWith(fontFamily: fontName),bodyMedium: base.bodyMedium?.copyWith(fontFamily: fontName),titleMedium: base.titleMedium?.copyWith(fontFamily: fontName),titleSmall: base.titleSmall?.copyWith(fontFamily: fontName),labelSmall: base.labelSmall?.copyWith(fontFamily: fontName),);}static ThemeData buildLightTheme() {// #54D3C2// #54D3C2// #4677FFconst Color primaryColor = Color(0xff1C1D1F);const Color secondaryColor = Color(0xff1C1D1F);const Color primaryColorDark = Color(0xff4677FF);final ColorScheme colorScheme = const ColorScheme.light().copyWith(primary: primaryColor,secondary: secondaryColor,);final ThemeData base = ThemeData.light();return base.copyWith(primaryColor: primaryColor,primaryColorDark: primaryColorDark,indicatorColor: Colors.white,splashColor: Colors.white24,splashFactory: InkRipple.splashFactory,canvasColor: Colors.white,// #F6F6F6scaffoldBackgroundColor: const Color(0xFFF6F6F6),buttonTheme: ButtonThemeData(colorScheme: colorScheme,textTheme: ButtonTextTheme.primary,),textTheme: _buildTextTheme(base.textTheme),primaryTextTheme: _buildTextTheme(base.primaryTextTheme),platform: TargetPlatform.iOS,colorScheme: colorScheme.copyWith(background: const Color(0xff1C1D1F))// #B00020.copyWith(error: const Color(0xFFB00020)),);}
}

RangePicker.dart  这个文件是使用的地方 这里还使用到了  getx 的组件 从底部弹出

// ignore_for_file: file_namesimport 'package:app/gen/assets.gen.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart';
import 'package:intl/intl.dart';import 'calendar_popup_view.dart';class RangePicker extends StatefulWidget {RangePicker({super.key, required this.apply});final Function(DateTime, DateTime) apply;@overrideState<RangePicker> createState() => _RangePickerState();
}class _RangePickerState extends State<RangePicker> {DateTime startDate = DateTime.now().subtract(const Duration(days: 90));DateTime endDate = DateTime.now();@overrideWidget build(BuildContext context) {return GestureDetector(onTap: () {openCalendarPopupView(context);},child: Row(children: [Text("${DateFormat('MM/dd').format(startDate)} - ${DateFormat('MM/dd').format(endDate)}",style: TextStyle(color: const Color(0xff676970),fontWeight: FontWeight.w500,fontSize: 12.sp,),),SizedBox(width: 4.w,),Assets.icon.botomArrowhead.image(width: 17.w),],),);}void openCalendarPopupView(BuildContext context) {Get.bottomSheet(isScrollControlled: true,StatefulBuilder(builder: (context, state) {return CalendarPopupView(state: state,minimumDate: DateTime.now().subtract(const Duration(days: 365)),maximumDate: DateTime.now(),initialEndDate: endDate,initialStartDate: startDate,onApplyClick: (DateTime startData, DateTime endData) {if (mounted) {setState(() {startDate = startData;endDate = endData;});state(() {startDate = startData;endDate = endData;});widget.apply(startDate, endDate);}},onCancelClick: () {},);}),);}
}

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