<template>
	<view class="qiun-columns">
		<!-- #ifdef MP-WEIXIN -->
			<ad unit-id="adunit-908b0a16e90e2a5f" ad-type="grid" grid-count="8" ad-theme="white"></ad>
			<!-- #endif -->
		<view class="qiun-bg-white qiun-title-bar qiun-common-mt qiun-rows" >
			<view class="qiun-title-dot-light">K线图与柱状图联动</view>
			<view style="flex: 1;qiun-rows;text-align: right;">
				<button type="default" size="mini" @tap="tapButton('in')">放大</button>
				<button type="default" size="mini" style="margin-left: 20upx;" @tap="tapButton('out')">缩小</button>
			</view>
		</view>
		<view class="qiun-charts">
			<!--#ifdef MP-ALIPAY -->
			<canvas canvas-id="canvasCandle" id="canvasCandle" class="charts" :width="cWidth*pixelRatio" :height="cHeight*pixelRatio" :style="{'width':cWidth+'px','height':cHeight+'px'}" disable-scroll=true @touchstart="touchCandle" @touchmove="moveCandle" @touchend="touchEndCandle"></canvas>
			<!--#endif-->
			<!--#ifndef MP-ALIPAY -->
			<canvas canvas-id="canvasCandle" id="canvasCandle" class="charts" disable-scroll=true @touchstart="touchCandle" @touchmove="moveCandle" @touchend="touchEndCandle"></canvas>
			<!--#endif-->
		</view>
		<view class="qiun-charts2" >
			<!--#ifdef MP-ALIPAY -->
			<canvas canvas-id="canvasColumn" id="canvasColumn" class="charts2" :width="cWidth*pixelRatio" :height="cHeight*pixelRatio" :style="{'width':cWidth+'px','height':cHeight+'px'}" ></canvas>
			<!--#endif-->
			<!--#ifndef MP-ALIPAY -->
			<canvas canvas-id="canvasColumn" id="canvasColumn" class="charts2"></canvas>
			<!--#endif-->
		</view>
		<view class="qiun-padding qiun-bg-white ">
			<slider :value="itemCount" min="5" :max="sliderMax" block-color="#f8f8f8" block-size="18" @changing="sliderMove" @change="sliderMove"/>
		</view>
		
		
	</view>
</template>

<script>
	import uCharts from '@/js_sdk/u-charts/u-charts.js';
	import  { isJSON } from '@/common/checker.js';
	var _self;
	var canvaCandle=null;
	var canvaColumn=null;
	
	export default {
		data() {
			return {
				cWidth:'',
				cHeight:'',
				cHeight2:'',
				pixelRatio:1,
				itemCount:20,//x轴单屏数据密度
				sliderMax:50
			}
		},
		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.cHeight2=uni.upx2px(200);
			this.getServerData();
		},
		methods: {
			getServerData(){
				uni.request({
					url: 'https://www.ucharts.cn/data.json',
					data:{
					},
					success: function(res) {
						console.log(res.data.data)
						let Candle={categories:[],series:[]};
						let Column={categories:[],series:[]};
						//这里我后台返回的是数组，所以用等于，如果您后台返回的是单条数据，需要push进去
						Candle.categories=res.data.data.Candle.categories;
						Candle.series=res.data.data.Candle.series;
						Column.categories=res.data.data.CandleColumn.categories;
						Column.series=res.data.data.CandleColumn.series;
						_self.showCandle("canvasCandle",Candle);
						_self.showColumn("canvasColumn",Column);
					},
					fail: () => {
						_self.tips="网络错误，小程序端请检查合法域名";
					},
				});
			},
			showCandle(canvasId,chartData){
				canvaCandle=new uCharts({
					$this:_self,
					canvasId: canvasId,
					type: 'candle',
					fontSize:11,
					padding:[10,15,0,15],
					legend:{
						show:true,
					},
					background:'#FFFFFF',
					pixelRatio:_self.pixelRatio,
					categories: chartData.categories,
					series: chartData.series,
					animation: false,
					enableScroll: true,
					xAxis: {
						disableGrid:true,
						labelCount:4,
						//type:'grid',
						//gridType:'dash',
						itemCount:_self.itemCount,
						scrollShow:true,
						scrollAlign:'right',
					},
					yAxis: {
						//disabled:true
						gridType:'dash',
						splitNumber:5,
						format:(val)=>{return val.toFixed(0)}
					},
					width: _self.cWidth*_self.pixelRatio,
					height: _self.cHeight*_self.pixelRatio,
					dataLabel: false,
					dataPointShape: true,
					extra: {
						candle:{
							color:{
								upLine:'#f04864',
								upFill:'#f04864',
								downLine:'#2fc25b',
								downFill:'#2fc25b'
							},
							average:{
								show:true,
								name:['MA5','MA10','MA30'],
								day:[5,10,20],
								color:['#1890ff', '#2fc25b', '#facc14']
							}
						},
						tooltip:{
							bgColor:'#000000',
							bgOpacity:0.7,
							gridType:'dash',
							dashLength:5,
							gridColor:'#1890ff',
							fontColor:'#FFFFFF',
							horizentalLine:true,
							xAxisLabel:true,
							yAxisLabel:true,
							labelBgColor:'#DFE8FF',
							labelBgOpacity:0.95,
							labelAlign:'left',
							labelFontColor:'#666666'
						}
					},
				});
				
			},
			touchCandle(e){
				canvaCandle.scrollStart(e);
			},
			moveCandle(e) {
				let distance = canvaCandle.scroll(e);
				if(distance!==undefined){
					canvaColumn.translate(distance);
				}
			},
			touchEndCandle(e) {
				canvaCandle.scrollEnd(e);
				//下面是toolTip事件，如果滚动后不需要显示，可不填写
				canvaCandle.showToolTip(e, {
					format: function (item, category) {
						return category + ' ' + item.name + ':' + item.data 
					}
				});
			},
			tapButton(type){
				let step=5;
				if(type=='in'){
					_self.itemCount -= step;
					if(_self.itemCount<=5){
						_self.itemCount=5;
					}
				}else{
					_self.itemCount += step;
					if(_self.itemCount>=_self.sliderMax){
						_self.itemCount=_self.sliderMax;
					}
				}
				_self.zoomCandle(_self.itemCount);
			},
			sliderMove(e){
				_self.itemCount=e.detail.value;
				_self.zoomCandle(e.detail.value);
			},
			zoomCandle(val) {
				canvaCandle.zoom({
					itemCount: val
				});
				canvaColumn.zoom({
					itemCount: val
				});
			},
			showColumn(canvasId,chartData){
				canvaColumn=new uCharts({
					$this:_self,
					canvasId: canvasId,
					type: 'column',
					padding:[10,15,0,15],
					legend:{
						show:false,
					},
					fontSize:11,
					background:'#FFFFFF',
					pixelRatio:_self.pixelRatio,
					animation: false,
					enableScroll:true,
					dataLabel:false,
					categories: chartData.categories,
					series: chartData.series,
					xAxis: {
						disabled:true,
						disableGrid:true,
						labelCount:4,
						itemCount:_self.itemCount,
						scrollAlign:'right',
					},
					yAxis: {
						disableGrid:true,
						splitNumber: 2,
						min:0,
						format:(val)=>{return val.toFixed(0)}
					},
					width: _self.cWidth*_self.pixelRatio,
					height: _self.cHeight2*_self.pixelRatio,
					extra: {
						column: {
							type:'group',
						}
					  }
				});
				
			}
		}
	}
</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;
	}
	.qiun-charts2 {
		width: 750upx;
		height: 200upx;
		background-color: #FFFFFF;
	}
	
	.charts2 {
		width: 750upx;
		height: 200upx;
		background-color: #FFFFFF;
	}
</style>
