76 lines
1.5 KiB
Dart
76 lines
1.5 KiB
Dart
// Author: fengshengxiong
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// Date: 2024/5/7
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// Description: 状态视图
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import 'package:flutter/material.dart';
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import 'package:flutter_screenutil/flutter_screenutil.dart';
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/// 四种视图状态
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enum ViewState { normal, error, loading, empty }
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class ViewStateWidget extends StatelessWidget {
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const ViewStateWidget({super.key, required this.state, required this.child});
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final ViewState state;
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final Widget child;
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@override
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Widget build(BuildContext context) {
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switch (state) {
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case ViewState.normal:
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return child;
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case ViewState.loading:
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return loadingView();
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case ViewState.error:
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return errorView;
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case ViewState.empty:
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return emptyView;
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}
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}
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}
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/// 加载中视图
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Widget loadingView({
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Color? color,
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Animation<Color?>? valueColor,
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Color? backgroundColor,
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double? value,
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}) {
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return Center(
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child: CircularProgressIndicator(
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color: color,
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valueColor: valueColor,
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backgroundColor: backgroundColor ?? Colors.grey,
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value: value,
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),
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);
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}
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/// 空视图
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Widget get emptyView {
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return Center(
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child: Text(
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'No data available',
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textAlign: TextAlign.center,
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style: TextStyle(
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color: Colors.white,
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fontSize: 14.sp,
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),
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),
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);
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}
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/// 错误视图
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Widget get errorView {
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return Center(
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child: Text(
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'An error occurred, please try again later',
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textAlign: TextAlign.center,
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style: TextStyle(
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color: Colors.white,
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fontSize: 14.sp,
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),
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),
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);
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}
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