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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| #storePassword=toly1994 | ||
| #keyPassword=toly1994328 | ||
| #keyAlias= king | ||
| #storeFile=/Users/mac/Coder/files/key/toly1994.jks |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| import 'dart:math'; | ||
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| import 'package:flutter/cupertino.dart'; | ||
| import 'package:flutter/material.dart'; | ||
|
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| typedef OnDropSelected = void Function(int index); | ||
|
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| class DropSelectableWidget extends StatefulWidget { | ||
| final List<String> data; | ||
| final OnDropSelected onDropSelected; | ||
| final Color disableColor; | ||
| final double iconSize; | ||
| final double height; | ||
| final double width; | ||
| final double fontSize; | ||
|
|
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| const DropSelectableWidget( | ||
| {Key key, | ||
| this.data = const [], | ||
| this.onDropSelected, | ||
| this.disableColor = Colors.black, | ||
| this.iconSize = 24, | ||
| this.height = 30, | ||
| this.width = 200, | ||
| this.fontSize = 14, | ||
| }) | ||
| : super(key: key); | ||
|
|
||
| @override | ||
| _DropSelectableWidgetState createState() => _DropSelectableWidgetState(); | ||
| } | ||
|
|
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| class _DropSelectableWidgetState extends State<DropSelectableWidget> | ||
| with SingleTickerProviderStateMixin { | ||
| FocusNode _node; | ||
| bool _focused = false; | ||
| FocusAttachment _nodeAttachment; | ||
| Color _color = Colors.white; | ||
| OverlayEntry _overlayEntry; | ||
| AnimationController _ctrl; | ||
| Animation<double> animation; | ||
| final LayerLink layerLink = LayerLink(); | ||
|
|
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| int _selectedIndex = 0; | ||
|
|
||
| @override | ||
| void initState() { | ||
| super.initState(); | ||
|
|
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| _ctrl = AnimationController( | ||
| vsync: this, | ||
| duration: const Duration(milliseconds: 200), | ||
| ); | ||
|
|
||
| animation = Tween<double>(begin: 0, end: pi).animate(_ctrl); | ||
| _node = FocusNode() | ||
| ..addListener(() { | ||
| if (_node.hasFocus != _focused) { | ||
| if (!_focused) { | ||
| _ctrl.forward(); | ||
| _showOverlay(); | ||
| } else { | ||
| _hideOverlay(); | ||
| _ctrl.reverse(); | ||
| } | ||
| setState(() { | ||
| _focused = _node.hasFocus; | ||
| }); | ||
| } | ||
| }); | ||
| _nodeAttachment = _node.attach(context); | ||
| } | ||
|
|
||
| @override | ||
| void dispose() { | ||
| _node.dispose(); | ||
| _ctrl.dispose(); | ||
| super.dispose(); | ||
| } | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| _nodeAttachment.reparent(); | ||
| return GestureDetector( | ||
| behavior: HitTestBehavior.opaque, | ||
| onTap: () { | ||
| if (_focused) { | ||
| _node.unfocus(); | ||
| } else { | ||
| _node.requestFocus(); | ||
| } | ||
| }, | ||
| child: CompositedTransformTarget( | ||
| link: layerLink, | ||
| child: buildTarget(), | ||
| ), | ||
| ); | ||
| } | ||
|
|
||
| void _showOverlay() { | ||
| _overlayEntry = _createOverlayEntry(); | ||
| Overlay.of(context).insert(_overlayEntry); | ||
| } | ||
|
|
||
| void _hideOverlay() { | ||
| _overlayEntry?.remove(); | ||
| } | ||
|
|
||
| Widget buildTarget() { | ||
| return Container( | ||
| width: widget.width, | ||
| height: widget.height, | ||
| padding: EdgeInsets.only(left: 10, right: 10), | ||
| decoration: BoxDecoration( | ||
| borderRadius: BorderRadius.circular(20), | ||
| border: Border.all( | ||
| color: _focused ? Colors.blue : widget.disableColor, | ||
| )), | ||
| child: Row( | ||
| mainAxisAlignment: MainAxisAlignment.spaceBetween, | ||
| children: [ | ||
| Text( | ||
| '${widget.data.isNotEmpty ? widget.data[_selectedIndex] : "暂无数据"}',style: TextStyle( | ||
| height: 1, | ||
| fontSize: widget.fontSize | ||
| ),), | ||
| AnimatedBuilder( | ||
| animation: animation, | ||
| builder: (_, child) => Transform.rotate( | ||
| angle: animation.value, | ||
| child: child, | ||
| ), | ||
| child: Icon( | ||
| Icons.keyboard_arrow_down, | ||
| size: widget.iconSize, | ||
| ), | ||
| ), | ||
| ], | ||
| ), | ||
| ); | ||
| } | ||
|
|
||
| OverlayEntry _createOverlayEntry() => OverlayEntry( | ||
| builder: (BuildContext context) => UnconstrainedBox( | ||
| child: CompositedTransformFollower( | ||
| link: layerLink, | ||
| targetAnchor: Alignment.bottomCenter, | ||
| followerAnchor: Alignment.topCenter, | ||
| child: Padding( | ||
| padding: const EdgeInsets.only(top: 4.0), | ||
| child: Material( | ||
| shape: RoundedRectangleBorder( | ||
| side: BorderSide.none, | ||
| borderRadius: BorderRadius.all(Radius.circular(5))), | ||
| elevation: 1, | ||
| child: ClipRRect( | ||
| borderRadius: BorderRadius.circular(5), | ||
| child: Container( | ||
| height: 200, | ||
| // alignment: Alignment.center, | ||
| decoration: BoxDecoration( | ||
| color: Color(0xffDAE3FF), | ||
| ), | ||
| // padding: const EdgeInsets.only(top: 5), | ||
| width: widget.width, | ||
| child: CupertinoScrollbar( | ||
| child: ListView.builder( | ||
| padding: EdgeInsets.zero, | ||
| // shrinkWrap: true, | ||
| itemCount: widget.data.length, | ||
| itemBuilder: _buildItem), | ||
| ), | ||
| ), | ||
| ), | ||
| ), | ||
| ), | ||
| ), | ||
| ), | ||
| ); | ||
|
|
||
| Widget _buildItem(BuildContext context, int index) { | ||
| return Material( | ||
| child: InkWell( | ||
| onTap: () { | ||
| if (_selectedIndex != index) widget.onDropSelected?.call(index); | ||
| _selectedIndex = index; | ||
| _overlayEntry.markNeedsBuild(); | ||
| _node.unfocus(); | ||
| }, | ||
| child: Container( | ||
| padding: EdgeInsets.all(8), | ||
| color: index == _selectedIndex | ||
| ? Colors.blue.withOpacity(0.2) | ||
| : Colors.transparent, | ||
| child: Text('${widget.data[index]}',style: TextStyle(fontSize: widget.fontSize),)), | ||
| ), | ||
| ); | ||
| } | ||
| } |