laiiihz
5 years ago
parent
ed56824f93
commit
5c22c9681f
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After Width: | Height: | Size: 5.4 KiB |
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After Width: | Height: | Size: 4.4 KiB |
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import 'package:flutter/material.dart';
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import 'package:recook/constants/header.dart';
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import 'package:recook/pages/lottery/redeem_lottery_page.dart';
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import 'package:recook/pages/lottery/widget/lottery_ball.dart';
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import 'package:recook/widgets/custom_image_button.dart';
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class LotteryView extends StatefulWidget {
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final LotteryType type;
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final LotteryColorType colorType;
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final Function(List<int> selected) onSelect;
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LotteryView({
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Key key,
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this.type = LotteryType.DOUBLE_LOTTERY,
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this.colorType = LotteryColorType.RED,
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this.onSelect,
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}) : super(key: key);
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@override
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LotteryViewState createState() => LotteryViewState();
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}
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class LotteryViewState extends State<LotteryView> {
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int lotterySize;
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List<SingleBox> _lotteryBoxes = [];
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List<SingleBox> _selectedBoxes = [];
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List<SingleBox> _focusedBoxes = [];
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@override
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void initState() {
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super.initState();
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lotterySize = widget.type == LotteryType.DOUBLE_LOTTERY
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? widget.colorType == LotteryColorType.RED ? 33 : 16
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: widget.colorType == LotteryColorType.RED ? 35 : 12;
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for (int i = 1; i <= lotterySize; i++) {
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_lotteryBoxes.add(SingleBox(i));
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}
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}
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selectAllBlue() {
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_selectedBoxes.clear();
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_lotteryBoxes.forEach((element) {
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_selectedBoxes.add(element);
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});
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setState(() {});
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}
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clear() {
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_selectedBoxes.clear();
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_focusedBoxes.clear();
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setState(() {});
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}
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random1Shot() {
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_selectedBoxes.clear();
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_focusedBoxes.clear();
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List<SingleBox> temp = [];
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_lotteryBoxes.forEach((element) => temp.add(element));
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int randomShotsSize = widget.type == LotteryType.DOUBLE_LOTTERY
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? widget.colorType == LotteryColorType.RED ? 6 : 1
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: widget.colorType == LotteryColorType.RED ? 5 : 2;
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for (int i = 0; i < randomShotsSize; i++) {
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temp.shuffle();
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_selectedBoxes.add(temp[0]);
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temp.removeAt(0);
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}
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setState(() {});
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// 随机球不包含胆球算法
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// if (limitSize < _focusedBoxes.length) {
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// showToast(
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// '${widget.colorType == LotteryColorType.RED ? '红球' : '蓝球'}胆球数过多');
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// } else {
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// _selectedBoxes.clear();
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// List<SingleBox> temp = [];
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// _lotteryBoxes.forEach((element) => temp.add(element));
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// _focusedBoxes.forEach((element) {
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// _selectedBoxes.add(element);
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// temp.remove(element);
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// });
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// int randomShotsSize = widget.type == LotteryType.DOUBLE_LOTTERY
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// ? widget.colorType == LotteryColorType.RED ? 6 : 1
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// : widget.colorType == LotteryColorType.RED ? 5 : 2;
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// for (int i = 0; i < (randomShotsSize - _focusedBoxes.length); i++) {
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// temp.shuffle();
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// _selectedBoxes.add(temp[0]);
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// temp.removeAt(0);
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// }
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// setState(() {});
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// }
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}
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@override
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Widget build(BuildContext context) {
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return GridView.count(
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physics: NeverScrollableScrollPhysics(),
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crossAxisCount: 7,
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shrinkWrap: true,
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crossAxisSpacing: rSize(16),
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mainAxisSpacing: rSize(16),
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childAspectRatio: 1,
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padding: EdgeInsets.symmetric(
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horizontal: rSize(16),
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),
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children: _lotteryBoxes.map((e) => _buildLotteryBox(e)).toList(),
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);
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}
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Widget _buildLotteryBox(SingleBox box) {
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bool selected = _selectedBoxes.indexOf(box) != -1;
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bool focused = _focusedBoxes.indexOf(box) != -1;
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return CustomImageButton(
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padding: EdgeInsets.zero,
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onPressed: () {
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if (!selected) {
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_selectedBoxes.add(box);
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} else if (selected && !focused) {
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_focusedBoxes.add(box);
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} else {
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_selectedBoxes.remove(box);
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_focusedBoxes.remove(box);
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}
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widget.onSelect(
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_selectedBoxes.map((e) => e.value).toList(),
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);
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setState(() {});
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},
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child: Container(
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decoration: BoxDecoration(
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color: selected
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? widget.colorType == LotteryColorType.RED
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? Color(0xFFE02020)
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: Color(0xFF0E89E7)
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: Colors.white,
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borderRadius: BorderRadius.circular(rSize(18)),
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border: Border.all(
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width: rSize(1),
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color: widget.colorType == LotteryColorType.RED
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? Color(0xFFE02020)
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: Color(0xFF0E89E7),
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),
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),
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alignment: Alignment.center,
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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Text(
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box.displayStr,
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style: TextStyle(
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fontSize: rSP(16),
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color: selected
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? Colors.white
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: widget.colorType == LotteryColorType.RED
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? Color(0xFFE02020)
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: Color(0xFF0E89E7),
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),
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),
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focused
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? Text(
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'胆',
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style: TextStyle(
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height: 1,
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color: Colors.white,
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fontSize: rSP(14),
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),
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)
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: SizedBox(),
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],
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),
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),
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);
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}
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}
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class SingleBox {
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int value;
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String get displayStr => (value < 10) ? "0$value" : "$value";
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SingleBox(this.value);
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}
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@ -0,0 +1,20 @@
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class RecookMath {
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///组合数算法
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///
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///传统算法会出现溢出
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///
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///
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///[Stackoverflow](https://stackoverflow.com/questions/12130094/optimizing-calculating-combination-and-avoiding-overflows)
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///
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///[blog](https://blog.plover.com/math/choose.html)
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static int combination(int k, int n) {
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int r = 1;
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int d;
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if (k > n) return 0;
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for (d = 1; d <= k; d++) {
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r *= n--;
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r = (r / d).floor();
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}
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return r;
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}
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}
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