<template>
	<view class="qiun-columns">
		<!--#ifdef H5 -->
		<view class="qiun-bg-white qiun-title-bar qiun-common-mt" >
			<view class="qiun-title-dot-light">页面地址</view>
		</view>
		<view class="qiun-bg-white qiun-padding">
		    <text>pages/basic/area/time</text>
		</view>
		<!--#endif-->
		<view class="qiun-bg-white qiun-title-bar qiun-common-mt" >
			<view class="qiun-title-dot-light">时间X轴</view>
		</view>
		<view class="qiun-charts" >
			<!--#ifdef MP-ALIPAY -->
			<canvas canvas-id="canvasLineA" id="canvasLineA" class="charts" :width="cWidth*pixelRatio" :height="cHeight*pixelRatio" :style="{'width':cWidth+'px','height':cHeight+'px'}" @touchstart="touchLineA"></canvas>
			<!--#endif-->
			<!--#ifndef MP-ALIPAY -->
			<canvas canvas-id="canvasLineA" id="canvasLineA" class="charts" @touchstart="touchLineA"></canvas>
			<!--#endif-->
		</view>
		<!-- #ifdef MP-WEIXIN -->
		<ad unit-id="adunit-908b0a16e90e2a5f" ad-type="grid" grid-count="8" ad-theme="white"></ad>
		<!-- #endif -->
		<!--#ifdef H5 -->
		<view class="qiun-bg-white qiun-title-bar qiun-common-mt" >
			<view class="qiun-title-dot-light">标准数据格式</view>
		</view>
		<view class="qiun-bg-white qiun-padding">
		    <textarea class="qiun-textarea" auto-height="true" maxlength="-1" v-model="textarea"/>
		</view>
		<view class="qiun-text-tips">Tips：修改后点击更新图表</view>
		<button class="qiun-button" @tap="changeData()">更新图表</button>
		<!--#endif-->
	</view>
</template>

<script>
	import uCharts from '@/js_sdk/u-charts/u-charts.js';
	import  { isJSON } from '@/common/checker.js';
	
	var _self;
	var canvaLineA=null;
	export default {
		data() {
			return {
				cWidth:'',
				cHeight:'',
				pixelRatio:1,
				textarea:''
			}
		},
		onShareAppMessage(){
				//#ifdef MP-QQ
				qq.showShareMenu({showShareItems: ['qq', 'qzone', 'wechatFriends', 'wechatMoment']})
				//#endif
		},
		onLoad() {
			_self = this;
			//#ifdef MP-ALIPAY
			uni.getSystemInfo({
				success: function (res) {
					if(res.pixelRatio>1){
						//正常这里给2就行，如果pixelRatio=3性能会降低一点
						//_self.pixelRatio =res.pixelRatio;
						_self.pixelRatio =2;
					}
				}
			});
			//#endif
			this.cWidth=uni.upx2px(750);
			this.cHeight=uni.upx2px(500);
			this.getServerData();
		},
		methods: {
			getServerData(){
				uni.request({
					url: 'https://www.ucharts.cn/data.json',
					data:{
					},
					success: function(res) {
						console.log(res.data.data)
						let LineA={series:[{name:'时间轴',data:[
							[10000,75],[50000,35],[150000,55],[170000,35],[190000,75],
							[210000,25],[280000,5],[450000,95],[460000,5],[470000,95],
							[490000,5]
						]}]};
						_self.textarea = JSON.stringify(res.data.data.LineA);
						_self.showLineA("canvasLineA",LineA);
					},
					fail: () => {
						_self.tips="网络错误，小程序端请检查合法域名";
					},
				});
			},
			formatDateTime(timeStamp, returnType){
				var date = new Date();
				date.setTime(timeStamp * 1000);
				var y = date.getFullYear();
				var m = date.getMonth() + 1;
				m = m < 10 ? ('0' + m) : m;
				var d = date.getDate();
				d = d < 10 ? ('0' + d) : d;
				var h = date.getHours();
				h = h < 10 ? ('0' + h) : h;
				var minute = date.getMinutes();
				var second = date.getSeconds();
				minute = minute < 10 ? ('0' + minute) : minute;
				second = second < 10 ? ('0' + second) : second;
				if(returnType == 'str'){return  h +':' + minute;}
				return [y, m, d, h, minute, second];
			},
			showLineA(canvasId,chartData){
				canvaLineA=new uCharts({
					$this:_self,
					canvasId: canvasId,
					type: 'area',
					fontSize:11,
					padding:[15,20,0,15],
					legend:false,
					dataLabel:true,
					dataPointShape:true,
					background:'#FFFFFF',
					pixelRatio:_self.pixelRatio,
					categories: chartData.categories,
					series: chartData.series,
					animation: false,
					xAxis: {
						type:'grid',
						gridColor:'#CCCCCC',
						gridType:'dash',
						dashLength:8,
            boundaryGap:'justify',
						splitNumber:5,
						format:(val)=>{return this.formatDateTime(val,'str')}
					},
					yAxis: {
						gridType:'dash',
						gridColor:'#CCCCCC',
						dashLength:8,
						splitNumber:5,
						format:(val)=>{return val.toFixed(0)+'元'}
					},
					width: _self.cWidth*_self.pixelRatio,
					height: _self.cHeight*_self.pixelRatio,
					extra: {
						area:{
							type: 'curve',
							addLine:true,
							gradient:true
						}
					}
				});
				
			},
			touchLineA(e) {
				canvaLineA.showToolTip(e, {
					format: function (item, category) {
						return item.name + ':' + item.data 
					}
				});
			},
			changeData(){
				if(isJSON(_self.textarea)){
					let newdata=JSON.parse(_self.textarea);
					canvaLineA.updateData({
						series: newdata.series,
						categories: newdata.categories
					});
				}else{
					uni.showToast({
						title:'数据格式错误',
						image:'../../../static/images/alert-warning.png'
					})
				}
			}
		}
	}
</script>

<style>
	/*样式的width和height一定要与定义的cWidth和cHeight相对应*/
	.qiun-charts {
		width: 750upx;
		height: 500upx;
		background-color: #FFFFFF;
	}
	
	.charts {
		width: 750upx;
		height: 500upx;
		background-color: #FFFFFF;
	}
</style>
