import 'dart:async'; import 'dart:convert'; import 'dart:io'; import 'package:flutter/material.dart'; import 'package:pikapi/basic/Channels.dart'; import 'package:pikapi/basic/Common.dart'; import 'package:pikapi/basic/Entities.dart'; import 'package:pikapi/basic/Method.dart'; import 'DownloadImportScreen.dart'; import 'DownloadInfoScreen.dart'; import 'components/ContentLoading.dart'; import 'components/DownloadInfoCard.dart'; // 下载列表 class DownloadListScreen extends StatefulWidget { @override State createState() => _DownloadListScreenState(); } class _DownloadListScreenState extends State { DownloadComic? _downloading; late bool _downloadRunning = false; late Future> _f = method.allDownloads(); void _onMessageChange(String event) { print("EVENT"); print(event); if (event is String) { try { setState(() { _downloading = DownloadComic.fromJson(json.decode(event)); }); } catch (e, s) { print(e); print(s); } } } @override void initState() { registerEvent(_onMessageChange, "DOWNLOAD"); method .downloadRunning() .then((val) => setState(() => _downloadRunning = val)); super.initState(); } @override void dispose() { unregisterEvent(_onMessageChange); super.dispose(); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('下载列表'), actions: [ importButton(), pauseButton(), resetFailedButton(), ], ), body: FutureBuilder( future: _f, builder: (BuildContext context, AsyncSnapshot> snapshot) { if (snapshot.hasError) { print("${snapshot.error}"); print("${snapshot.stackTrace}"); return Center(child: Text('加载失败')); } if (snapshot.connectionState != ConnectionState.done) { return ContentLoading(label: '加载中'); } var data = snapshot.data!; if (_downloading != null) { print(_downloading); try { for (var i = 0; i < data.length; i++) { if (_downloading!.id == data[i].id) { data[i].copy(_downloading!); } } } catch (e, s) { print(e); print(s); } } return ListView( children: [ ...data.map( (e) => InkWell( onTap: () { if (e.deleting) { return; } Navigator.push( context, MaterialPageRoute( builder: (context) => DownloadInfoScreen( comicId: e.id, comicTitle: e.title, ), ), ); }, onLongPress: () async { String? action = await chooseListDialog(context, e.title, ['删除']); if (action == '删除') { await method.deleteDownloadComic(e.id); setState(() => e.deleting = true); } }, child: DownloadInfoCard( task: e, downloading: _downloading != null && _downloading!.id == e.id, ), ), ), ], ); }, ), ); } Widget importButton() { return MaterialButton( minWidth: 0, onPressed: () async { await Navigator.push( context, MaterialPageRoute( builder: (context) => DownloadImportScreen(), ), ); setState(() { _f = method.allDownloads(); }); }, child: Column( children: [ Expanded(child: Container()), Icon( Icons.label_important, size: 18, color: Colors.white, ), Text( '导入', style: TextStyle(fontSize: 14, color: Colors.white), ), Expanded(child: Container()), ], )); } Widget pauseButton() { return MaterialButton( minWidth: 0, onPressed: () { showDialog( context: context, builder: (BuildContext context) { return AlertDialog( title: Text('下载任务'), content: Text( _downloadRunning ? "暂停下载吗?" : "启动下载吗?", ), actions: [ MaterialButton( onPressed: () async { Navigator.pop(context); }, child: Text('取消'), ), MaterialButton( onPressed: () async { Navigator.pop(context); var to = !_downloadRunning; await method.setDownloadRunning(to); setState(() { _downloadRunning = to; }); }, child: Text('确认'), ), ], ); }, ); }, child: Column( children: [ Expanded(child: Container()), Icon( _downloadRunning ? Icons.compare_arrows_sharp : Icons.schedule_send, size: 18, color: Colors.white, ), Text( _downloadRunning ? '下载中' : '暂停中', style: TextStyle(fontSize: 14, color: Colors.white), ), Expanded(child: Container()), ], )); } Widget resetFailedButton() { return MaterialButton( minWidth: 0, onPressed: () async { await method.resetFailed(); setState(() { _f = method.allDownloads(); }); defaultToast(context, "所有失败的下载已经恢复"); }, child: Column( children: [ Expanded(child: Container()), Icon( Icons.sync_problem, size: 18, color: Colors.white, ), Text( '恢复', style: TextStyle(fontSize: 14, color: Colors.white), ), Expanded(child: Container()), ], )); } }