<template>
	<view class="wrap">
		<u-waterfall v-model="flowList" ref="uWaterfall">
			<template v-slot:left="{ leftList }">
				<view class="demo-warter" v-for="(item, index) in leftList" :key="index">
					<!-- 警告：微信小程序不支持嵌入lazyload组件，请自行如下使用image标签 -->
					<!-- #ifndef MP-WEIXIN -->
					<u-lazy-load threshold="-450" border-radius="10" :image="item.image" :index="index"></u-lazy-load>
					<!-- #endif -->
					<!-- #ifdef MP-WEIXIN -->
					<view class="demo-img-wrap"><image class="demo-image" :src="item.image" mode="widthFix"></image></view>
					<!-- #endif -->
					<view class="demo-title">{{ item.title }}</view>
					<view class="demo-price">{{ item.price }}元</view>
					<view class="demo-tag">
						<view class="demo-tag-owner">自营</view>
						<view class="demo-tag-text">放心购</view>
					</view>
					<view class="demo-shop">{{ item.shop }}</view>
					<!-- 微信小程序无效，因为它不支持在template中引入组件 -->
					<view class="u-close">
						<u-icon name="close-circle-fill" color="#fa3534" size="34" @click="remove(item.id)"></u-icon>
					</view>
				</view>
			</template>
			<template v-slot:right="{ rightList }">
				<view class="demo-warter" v-for="(item, index) in rightList" :key="index">
					<!-- #ifndef MP-WEIXIN -->
					<u-lazy-load threshold="-450" border-radius="10" :image="item.image" :index="index"></u-lazy-load>
					<!-- #endif -->
					<!-- #ifdef MP-WEIXIN -->
					<view class="demo-img-wrap"><image class="demo-image" :src="item.image" mode="widthFix"></image></view>
					<!-- #endif -->
					<view class="demo-title">{{ item.title }}</view>
					<view class="demo-price">{{ item.price }}元</view>
					<view class="demo-tag">
						<view class="demo-tag-owner">自营</view>
						<view class="demo-tag-text">放心购</view>
					</view>
					<view class="demo-shop">{{ item.shop }}</view>
					<!-- 微信小程序无效，因为它不支持在template中引入组件 -->
					<view class="u-close">
						<u-icon name="close-circle-fill" color="#fa3534" size="34" @click="remove(item.id)"></u-icon>
					</view>
				</view>
			</template>
		</u-waterfall>
		<u-loadmore bg-color="rgb(240, 240, 240)" :status="loadStatus" @loadmore="addRandomData"></u-loadmore>
	</view>
</template>

<script>
export default {
	data() {
		return {
			loadStatus: 'loadmore',
			flowList: [],
			list: [
				{
					price: 35,
					title: '北国风光，千里冰封，万里雪飘',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic.sc.chinaz.com/Files/pic/pic9/202002/zzpic23327_s.jpg'
				},
				{
					price: 75,
					title: '望长城内外，惟余莽莽',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic.sc.chinaz.com/Files/pic/pic9/202002/zzpic23325_s.jpg'
				},
				{
					price: 385,
					title: '大河上下，顿失滔滔',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic2.sc.chinaz.com/Files/pic/pic9/202002/hpic2119_s.jpg'
				},
				{
					price: 784,
					title: '欲与天公试比高',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic2.sc.chinaz.com/Files/pic/pic9/202002/zzpic23369_s.jpg'
				},
				{
					price: 7891,
					title: '须晴日，看红装素裹，分外妖娆',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic2.sc.chinaz.com/Files/pic/pic9/202002/hpic2130_s.jpg'
				},
				{
					price: 2341,
					shop: '李白杜甫白居易旗舰店',
					title: '江山如此多娇，引无数英雄竞折腰',
					image: 'http://pic1.sc.chinaz.com/Files/pic/pic9/202002/zzpic23346_s.jpg'
				},
				{
					price: 661,
					shop: '李白杜甫白居易旗舰店',
					title: '惜秦皇汉武，略输文采',
					image: 'http://pic1.sc.chinaz.com/Files/pic/pic9/202002/zzpic23344_s.jpg'
				},
				{
					price: 1654,
					title: '唐宗宋祖，稍逊风骚',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic1.sc.chinaz.com/Files/pic/pic9/202002/zzpic23343_s.jpg'
				},
				{
					price: 1678,
					title: '一代天骄，成吉思汗',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic1.sc.chinaz.com/Files/pic/pic9/202002/zzpic23343_s.jpg'
				},
				{
					price: 924,
					title: '只识弯弓射大雕',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic1.sc.chinaz.com/Files/pic/pic9/202002/zzpic23343_s.jpg'
				},
				{
					price: 8243,
					title: '俱往矣，数风流人物，还看今朝',
					shop: '李白杜甫白居易旗舰店',
					image: 'http://pic1.sc.chinaz.com/Files/pic/pic9/202002/zzpic23343_s.jpg'
				}
			]
		};
	},
	onLoad() {
		this.addRandomData();
	},
	onReachBottom() {
		this.loadStatus = 'loading';
		// 模拟数据加载
		setTimeout(() => {
			this.addRandomData();
			this.loadStatus = 'loadmore';
		}, 1000);
	},
	methods: {
		addRandomData() {
			for (let i = 0; i < 10; i++) {
				let index = this.$u.random(0, this.list.length - 1);
				// 先转成字符串再转成对象，避免数组对象引用导致数据混乱
				let item = JSON.parse(JSON.stringify(this.list[index]));
				item.id = this.$u.guid();
				this.flowList.push(item);
			}
		},
		remove(id) {
			this.$refs.uWaterfall.remove(id);
		},
		clear() {
			this.$refs.uWaterfall.clear();
		}
	}
};
</script>

<style>
/* page不能写带scope的style标签中，否则无效 */
page {
	background-color: rgb(240, 240, 240);
}
</style>

<style lang="scss" scoped>
.demo-warter {
	border-radius: 8px;
	margin: 5px;
	background-color: #ffffff;
	padding: 8px;
	position: relative;
}

.u-close {
	position: absolute;
	top: 32rpx;
	right: 32rpx;
}

.demo-img-wrap {
}

.demo-image {
	width: 100%;
	border-radius: 4px;
}

.demo-title {
	font-size: 30rpx;
	margin-top: 5px;
	color: $u-main-color;
}

.demo-tag {
	display: flex;
	margin-top: 5px;
}

.demo-tag-owner {
	background-color: $u-type-error;
	color: #ffffff;
	display: flex;
	align-items: center;
	padding: 4rpx 14rpx;
	border-radius: 50rpx;
	font-size: 20rpx;
	line-height: 1;
}

.demo-tag-text {
	border: 1px solid $u-type-primary;
	color: $u-type-primary;
	margin-left: 10px;
	border-radius: 50rpx;
	line-height: 1;
	padding: 4rpx 14rpx;
	display: flex;
	align-items: center;
	border-radius: 50rpx;
	font-size: 20rpx;
}

.demo-price {
	font-size: 30rpx;
	color: $u-type-error;
	margin-top: 5px;
}

.demo-shop {
	font-size: 22rpx;
	color: $u-tips-color;
	margin-top: 5px;
}
</style>
