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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/flutter_custom_calendar.dart';
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import 'package:flutter_custom_calendar/utils/LogUtil.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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const MonthViewPager({Key key}) : super(key: key);
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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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with AutomaticKeepAliveClientMixin {
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CalendarProvider calendarProvider;
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@override
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void initState() {
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super.initState();
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LogUtil.log(TAG: this.runtimeType, message: "MonthViewPager 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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//
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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.monthController.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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LogUtil.log(TAG: this.runtimeType, message: "MonthViewPager 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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super.build(context);
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LogUtil.log(TAG: this.runtimeType, message: "MonthViewPager build");
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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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if (calendarProvider.expandStatus.value == false) {
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return;
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}
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//月份的变化
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DateModel dateModel = configuration.monthList[position];
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configuration.monthChangeListeners.forEach((listener) {
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listener(dateModel.year, dateModel.month);
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});
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//用来保存临时变量，用于月视图切换到周视图的时候，默认是显示中间的一周
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if (calendarProvider.lastClickDateModel != null ||
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calendarProvider.lastClickDateModel.month != dateModel.month) {
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DateModel temp = new DateModel();
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temp.year = configuration.monthList[position].year;
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temp.month = configuration.monthList[position].month;
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temp.day = configuration.monthList[position].day + 14;
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calendarProvider.lastClickDateModel = temp;
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}
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},
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controller: configuration.monthController,
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itemBuilder: (context, index) {
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final DateModel dateModel = configuration.monthList[index];
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return new MonthView(
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configuration: configuration,
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year: dateModel.year,
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month: dateModel.month,
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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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@override
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bool get wantKeepAlive => true;
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}
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