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import 'package:flutter/material.dart';
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import 'package:flutter_custom_calendar/calendar_provider.dart';
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import 'package:flutter_custom_calendar/configuration.dart';
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import 'package:flutter_custom_calendar/model/date_model.dart';
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import 'package:flutter_custom_calendar/utils/date_util.dart';
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import 'package:flutter_custom_calendar/widget/month_view.dart';
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import 'package:provider/provider.dart';
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class MonthViewPager extends StatefulWidget {
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MonthViewPager();
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@override
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_MonthViewPagerState createState() => _MonthViewPagerState();
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}
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class _MonthViewPagerState extends State<MonthViewPager> {
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CalendarProvider calendarProvider;
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var totalHeight;
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@override
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void initState() {
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calendarProvider = Provider.of<CalendarProvider>(context, listen: false);
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//计算当前月视图的index
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DateModel dateModel = calendarProvider.lastClickDateModel;
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List<DateModel> monthList =
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calendarProvider.calendarConfiguration.monthList;
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int index = 0;
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for (int i = 0; i < monthList.length; i++) {
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DateModel firstDayOfMonth = monthList[i];
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DateModel lastDayOfMonth = DateModel.fromDateTime(firstDayOfMonth
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.getDateTime()
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.add(Duration(
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days: DateUtil.getMonthDaysCount(
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firstDayOfMonth.year, firstDayOfMonth.month))));
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if ((dateModel.isAfter(firstDayOfMonth) ||
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dateModel.isSameWith(firstDayOfMonth)) &&
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dateModel.isBefore(lastDayOfMonth)) {
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index = i;
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break;
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}
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}
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WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
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calendarProvider.calendarConfiguration.pageController.jumpToPage(index);
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});
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}
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@override
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void dispose() {
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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// 获取到当前的CalendarProvider对象,设置listen为false，不需要刷新
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calendarProvider = Provider.of<CalendarProvider>(context, listen: false);
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CalendarConfiguration configuration =
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calendarProvider.calendarConfiguration;
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return PageView.builder(
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onPageChanged: (position) {
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//月份的变化
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DateModel dateModel = configuration.monthList[position];
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configuration.monthChange(dateModel.year, dateModel.month);
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//
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calendarProvider.lastClickDateModel = configuration.monthList[position];
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//计算下高度，使PageView自适应高度
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// double itemHeight = MediaQuery.of(context).size.width / 7;
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//
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// int lineCount =
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// DateUtil.getMonthViewLineCount(dateModel.year, dateModel.month);
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// double newHeight = itemHeight * lineCount +
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// configuration.verticalSpacing * (lineCount - 1);
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// if(totalHeight!=newHeight){
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// totalHeight=newHeight;
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// setState(() {
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//
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// });
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// }
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},
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controller: configuration.pageController,
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itemBuilder: (context, index) {
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DateModel dateModel = configuration.monthList[index];
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return new MonthView(
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year: dateModel.year,
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month: dateModel.month,
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minSelectDate: DateModel.fromDateTime(DateTime(
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configuration.minSelectYear,
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configuration.minSelectMonth,
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configuration.minSelectDay)),
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maxSelectDate: DateModel.fromDateTime(DateTime(
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configuration.maxSelectYear,
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configuration.maxSelectMonth,
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configuration.maxSelectDay)),
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extraDataMap: configuration.extraDataMap,
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);
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},
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itemCount: configuration.monthList.length,
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);
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}
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}
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