forked from lxm_flutter/FlutterUnit
102 lines
2.7 KiB
Dart
102 lines
2.7 KiB
Dart
import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020-03-23
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/// contact me by email 1981462002@qq.com
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/// 说明: 224 主题变化时具有动画效果的组件，本质是Theme组件和动画结合的产物。可指定ThemeData、动画时长、曲线、结束回调等。相当于增强版的Theme组件。
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// {
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// "widgetId": 224 ,
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// "name": 'AnimatedTheme基本使用',
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// "priority": 1,
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// "subtitle": "【data】 : 主题数据 【ThemeData】\n"
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// "【duration】 : 动画时长 【Duration】\n"
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// "【onEnd】 : 动画结束回调 【Function()】\n"
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// "【curve】 : 动画曲线 【Duration】\n"
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// "【child】 : 子组件 【Widget】",
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// }
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class AnimatedThemeDemo extends StatefulWidget {
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const AnimatedThemeDemo({Key? key}) : super(key: key);
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@override
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_AnimatedThemeDemoState createState() => _AnimatedThemeDemoState();
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}
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class _AnimatedThemeDemoState extends State<AnimatedThemeDemo> {
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ThemeData startThem = ThemeData(
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primaryColor: Colors.blue,
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textTheme: const TextTheme(
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headline1: TextStyle(
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color: Colors.white,
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fontSize: 24,
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fontWeight: FontWeight.bold,
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),
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));
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ThemeData endThem = ThemeData(
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primaryColor: Colors.red,
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textTheme: const TextTheme(
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headline1: TextStyle(
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color: Colors.black,
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fontSize: 16,
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fontWeight: FontWeight.normal,
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)));
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late ThemeData them;
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@override
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void initState() {
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super.initState();
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them = startThem;
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}
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@override
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Widget build(BuildContext context) {
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return Column(
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children: <Widget>[
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_buildSwitch(),
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AnimatedTheme(
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data: them,
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duration: const Duration(seconds: 2),
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curve: Curves.fastOutSlowIn,
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onEnd: () {
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print('----onEnd---');
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},
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child: const ChildContent(),
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),
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],
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);
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}
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Widget _buildSwitch() {
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print(them == endThem);
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return Switch(
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value: them == endThem,
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onChanged: (v) {
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setState(() {
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them = v ? endThem : startThem;
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});
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});
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}
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}
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class ChildContent extends StatelessWidget {
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const ChildContent({Key? key}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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return Container(
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width: 250,
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height: 60,
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alignment: Alignment.center,
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decoration: BoxDecoration(
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borderRadius: const BorderRadius.all(Radius.circular(5)),
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color: Theme.of(context).primaryColor,
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),
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padding: const EdgeInsets.all(10),
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child: Text(
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'Flutter Unit',
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style: Theme.of(context).textTheme.headline1,
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),
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);
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}
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}
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