<template>
 <div class="container">
 <div class="checkout-title">
  <span>购物车</span>
 </div>
 <table class="product_table">
  <tbody>
  <template v-for="(list,index) in table_list">
   <tr>
   <td width="7%" min-width="94px" v-if="index===0">
    <input type="checkbox" v-model='checked' @click='checkedAll'>
   </td>
   <td width="7%" v-if="index!==0">
    <input type="checkbox" v-model='checkList' :value="list.id" @click=checkProductFun(index,$event)>
   </td>
   <td width="43%">{{list.product_inf}}</td>
   <td width="10%" v-if="index===0">{{list.product_price}}</td>
   <td width="10%" v-if="index!==0">&yen;{{list.product_price}}</td>
   <td width="10%" v-if="index===0">{{list.product_quantity}}</td>
   <td width="10%" v-if="index!==0">
    <a class="numbers plus" href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" @click="changeMoney(index,-1)">-</a>
    <input class="txt_number" type="text" v-model="list.product_quantity" size="1" disabled>
    <a class="numbers reduce" href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" @click="changeMoney(index,1)">+</a>
   </td>
   <td width="10%">{{list.total_amount}}</td>
   <td width="20%" v-if="index===0">编辑</td>
   <td width="20%" v-if="index!==0">
    <a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="update">修改</a>
    <a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="delete">删除</a>
   </td>
   </tr>
  </template>
  </tbody>
 </table>
 <div class="price_total_bottom">
  <div class="price_total_ms">
  <label>合计：{{allProductTotal}}</label>
  <router-link to="/userAddress">结账</router-link>
  </div>
 </div>
 </div>
</template>
<script>
import userAddress from './address'
export default {
 components: {
 userAddress
 },
 data() {
 return {
  table_list: [{
  'id': 0,
  'product_inf': '商品信息',
  'product_price': '商品金额',
  'product_quantity': '商品数量',
  'total_amount': '总金额'
  }, {
  'id': '1',
  'product_inf': '女士银手链',
  'product_price': 100,
  'product_quantity': 10,
  'total_amount': 1000
  }, {
  'id': '2',
  'product_inf': '女士银手镯',
  'product_price': 200,
  'product_quantity': 5,
  'total_amount': 1000
  }, {
  'id': '3',
  'product_inf': '女士银耳环',
  'product_price': 50,
  'product_quantity': 10,
  'total_amount': 500
  }],
  checked: false,
  allProductTotal: null,
  checkList: ['1', '3']
 }
 },
 mounted: function() {
 var _this = this;
 // 根据data中默认勾选的checkbox，计算当前勾选的商品总价
 _this.allProductTotal = 0;
 this.checkList.forEach(function(element1, index1) {
  _this.table_list.forEach(function(element2, index2) {
  if (element1 == element2.id) {
   _this.$set(_this.table_list[index2], 'checked', true);
   _this.allProductTotal += element2.product_price * element2.product_quantity;
  }
  });
 });
 },
 methods: {
 checkedAll: function() {
  var _this = this;
  _this.allProductTotal = 0;
  if (_this.checked) { //实现反选
  _this.checkList = [];
  _this.table_list.forEach(function(item, index) {
   if (_this.table_list[index].checked) {
   _this.table_list[index].checked = false;
   }
  });
  } else { //实现全选
  _this.checkList = [];
  _this.table_list.forEach(function(item, index) {
   if (index > 0) {
   _this.checkList.push(item.id);
   if (!_this.table_list[index].checked) {
    _this.$set(_this.table_list[index], 'checked', true);
   } else {
    _this.table_list[index].checked = true;
   }
   if (item.checked) {
    _this.allProductTotal += item.product_price * item.product_quantity;
   }
   }
  });
  }
 },
 checkProductFun(index, event) { //根据checkbox是否勾选，计算勾选后的商品总价
  var _this = this;
  _this.allProductTotal = 0;
  if (event.target.checked) {
  if (!_this.table_list[index].checked) {
   _this.$set(_this.table_list[index], 'checked', true);
  }
  } else {
  if (_this.table_list[index].checked) {
   _this.table_list[index].checked = false;
  }
  }
  this.table_list.forEach(function(item, index) {
  if (item.checked) {
   _this.allProductTotal += item.product_price * item.product_quantity;
  }
  });
 },
 changeMoney: function(index, way) {
  if (way > 0) {
  this.table_list[index].product_quantity++;
  } else {
  this.table_list[index].product_quantity--;
  if (this.table_list[index].product_quantity < 1) {
   this.table_list[index].product_quantity = 1;
  }
  }
  this.calcTotalPrice();
 },
 calcTotalPrice: function() {
  var _this = this;
  _this.allProductTotal = 0;
  this.table_list.forEach(function(item, index) {
  if (index > 0) { //因为第一行为表头不需要进行计算
   item.total_amount = item.product_price * item.product_quantity; //根据商品数量计算每一个商品对应的总金额
  }
  if (item.checked) {
   _this.allProductTotal += item.product_price * item.product_quantity; //根据是否否选该商品的checkbox，计算总价
  }
  });
 },
 },
 watch: { //深度 watcher
 'checkList': {
  handler: function(val, oldVal) {
  if (val.length === this.table_list.length - 1) {
   this.checked = true;
  } else {
   this.checked = false;
  }
  },
  deep: true
 }
 }
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.container {
 padding: 69px 0 54px 0;
}
table {
 border-collapse: collapse;
 border-color: transparent;
 text-align: center;
}
.product_table,
.product_table tbody {
 width: 100%
}
.product_table tr:first-child {
 background: #ece6e6;
 color: #e66280;
 font-size: 20px;
}
.product_table td {
 border: 1px solid #f3e8e8;
 height: 62px;
 line-height: 62px;
}
.product_table a.update:link,
.product_table a.update:visited,
.product_table a.update:hover,
.product_table a.update:active {
 color: #1CE24A;
}
.product_table a.delete:link,
.product_table a.delete:visited,
.product_table a.delete:hover,
.product_table a.delete:active {
 color: #ffa700;
}
.product_table .txt_number {
 text-align: center;
}
.product_table .numbers {
 font-weight: bold;
}
.price_total_bottom {
 font-size: 20px;
 padding: 20px 10px;
}
.price_total_ms {
 text-align: right;
}
.price_total_bottom .price_total_ms label {
 margin-right: 100px;
}
.price_total_bottom .price_total_ms a {
 cursor: default;
 text-align: center;
 display: inline-block;
 font-size: 20px;
 color: #fff;
 font-weight: bold;
 width: 220px;
 height: 54px;
 line-height: 54px;
 border: 0;
 background-color: #f71455;
}
</style>