149 lines
3.4 KiB
Dart
149 lines
3.4 KiB
Dart
import 'dart:async';
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import 'package:easy_refresh/easy_refresh.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_dmzj/app/log.dart';
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import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
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import 'package:get/get.dart';
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class BaseController extends GetxController {
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/// 加载中，更新页面
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var pageLoadding = false.obs;
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/// 加载中,不会更新页面
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var loadding = false;
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/// 空白页面
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var pageEmpty = false.obs;
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/// 页面错误
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var pageError = false.obs;
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/// 未登录
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var notLogin = false.obs;
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/// 错误信息
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var errorMsg = "".obs;
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Error? error;
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/// 显示错误
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/// * [msg] 错误信息
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/// * [showPageError] 显示页面错误
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/// * 只在第一页加载错误时showPageError=true，后续页加载错误时使用Toast弹出通知
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void handleError(Object exception, {bool showPageError = false}) {
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Log.logPrint(exception);
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var msg = exceptionToString(exception);
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if (exception is Error) {
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error = exception;
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}
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if (showPageError) {
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pageError.value = true;
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errorMsg.value = msg;
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} else {
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SmartDialog.showToast(exceptionToString(msg));
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}
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}
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String exceptionToString(Object exception) {
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return exception.toString().replaceAll("Exception:", "");
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}
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void onLogin() {}
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void onLogout() {}
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}
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class BaseDataController<T> extends BaseController {
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T? data;
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Future loadData() async {
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try {
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if (loadding) return;
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loadding = true;
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pageError.value = false;
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pageLoadding.value = true;
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error = null;
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var result = await getData();
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data = result;
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} catch (e) {
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handleError(exceptionToString(e), showPageError: true);
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} finally {
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loadding = false;
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pageLoadding.value = false;
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}
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}
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Future<T?> getData() async {
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return null;
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}
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}
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class BasePageController<T> extends BaseController {
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final ScrollController scrollController = ScrollController();
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final EasyRefreshController easyRefreshController = EasyRefreshController();
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int currentPage = 1;
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int count = 0;
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int maxPage = 0;
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int pageSize = 24;
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var canLoadMore = false.obs;
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var list = <T>[].obs;
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Future refreshData() async {
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currentPage = 1;
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list.clear();
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await loadData();
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}
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Future loadData() async {
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try {
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if (loadding) return;
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loadding = true;
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pageError.value = false;
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pageEmpty.value = false;
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notLogin.value = false;
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error = null;
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pageLoadding.value = currentPage == 1;
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var result = await getData(currentPage, pageSize);
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//是否可以加载更多
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if (result.isNotEmpty) {
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currentPage++;
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canLoadMore.value = true;
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pageEmpty.value = false;
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} else {
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canLoadMore.value = false;
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if (currentPage == 1) {
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pageEmpty.value = true;
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}
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}
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// 赋值数据
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if (currentPage == 1) {
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list.value = result;
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} else {
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list.addAll(result);
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}
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} catch (e) {
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handleError(e, showPageError: currentPage == 1);
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} finally {
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loadding = false;
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pageLoadding.value = false;
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}
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}
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Future<List<T>> getData(int page, int pageSize) async {
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return [];
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}
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void scrollToTopOrRefresh() {
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if (scrollController.offset > 0) {
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scrollController.animateTo(
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0,
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duration: const Duration(milliseconds: 200),
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curve: Curves.linear,
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);
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} else {
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easyRefreshController.callRefresh();
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}
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}
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}
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