import 'package:flutter/material.dart';import 'package:transparent_image/transparent_image.dart';import 'package:just_audio/just_audio.dart';/** 常用图片按钮*/class KarenButton extends StatefulWidget {final String image;//按钮类型，决定发音方式final String type;final Function onPressed;final double width;final double height;final Widget child;const KarenButton({Key key,@required this.image,@required this.onPressed,@required this.width,@required this.height,this.child,this.type}): super(key: key);@overrideState<StatefulWidget> createState() {return _KarenButtonState();}}class _KarenButtonState extends State<KarenButton> {@overrideWidget build(BuildContext context) {return KarenImageButton(image: widget.image,onPressed: widget.onPressed,width: widget.width,height: widget.height,child: widget.child,type: widget.type,);}}/** 图片 按钮*/class KarenImageButton extends StatefulWidget {//常规状态final String image;final String type;final Function onPressed;final double width;final double height;final Widget child;KarenImageButton({Key key,@required this.image,@required this.onPressed,@required this.width,@required this.height,this.type,this.child,}) : super(key: key);@override_KarenImageButtonState createState() {return _KarenImageButtonState();}}class _KarenImageButtonState extends State<KarenImageButton> {int pressedLong = 0;String asset = 'audios/click02.wav';final _playerClick = AudioPlayer();final Map<String, String> audioAssets = {'click': 'audios/click02.wav','scroll': 'audios/scroll.m4a','close': 'audios/close.m4a','confirm': 'audios/confirm.m4a','cancel': 'audios/cancel.m4a','open': 'audios/open.m4a','success': 'audios/success.mp3','complete': 'audios/complete.m4a',};@overridevoid initState() {super.initState();setState(() {asset = audioAssets.containsKey(widget.type)? audioAssets[widget.type]: audioAssets['click'];_playerClick.setAsset(asset);});}Stream<bool> timer() {return Stream.periodic(Duration(milliseconds: 100), (i) {pressedLong -= 100;return pressedLong > 0 ? true : false;});}@overridevoid dispose() {if (_playerClick != null) {_playerClick.dispose();}super.dispose();}@overrideWidget build(BuildContext context) {return SizedBox(width: widget.width,height: widget.height,child: OutlineButton(padding: EdgeInsets.all(0),borderSide: BorderSide.none,onPressed: () {_playerClick.stop();_playerClick.play();setState(() {pressedLong = 500;});Future.delayed(Duration(milliseconds: 300), () {Function.apply(widget.onPressed, []);});},child: new Container(width: widget.width,height: widget.height,alignment: Alignment.center,child: Stack(children: <Widget>[StreamBuilder<bool>(stream: timer(),builder:(BuildContext context, AsyncSnapshot<bool> snapshot) {if (snapshot.hasError) return Text('');switch (snapshot.connectionState) {case ConnectionState.none:return Text('');case ConnectionState.waiting:return Center(child: KarenImg(img: widget.image,width: widget.width,height: widget.height,));case ConnectionState.active:return snapshot.data? Center(child: KarenImg(img: widget.image,width: widget.width * 0.8,height: widget.height * 0.8,)): Center(child: KarenImg(img: widget.image,width: widget.width,height: widget.height,),);case ConnectionState.done:return Text('');}return null; // unreachable},),Center(child: widget.child != null ? widget.child : Container(),),],)),),);}}class KarenImg extends StatefulWidget {final String img;final double width;final double height;const KarenImg({Key key, @required this.img, this.height, this.width}): super(key: key);@overrideState<StatefulWidget> createState() {return _KarenImgState();}}class _KarenImgState extends State<KarenImg> {@overrideWidget build(BuildContext context) {return widget.img.indexOf('http') > -1? new FadeInImage.memoryNetwork(placeholder: kTransparentImage,image: widget.img,height: widget.height,width: widget.width,): !widget.img.isEmpty? Image.asset(widget.img,width: widget.width,height: widget.height,): Container();}}
