後端Django和前端echarts輕鬆實現股票數據瀏覽
代碼見以下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>5分鐘上手ECharts</title>
<!-- 引入ECharts文件 -->
<script type="text/javascript" src="/static/js/echarts.js"></script>
<script type="text/javascript" src="/static/js/jquery-3.1.1.min.js"></script>
<style>
body{
background: black;
}
#main{
margin:20px auto;
}
</style>
</head>
<body>
<!-- 爲ECharts準備一個具備大小（寬高）的DOM -->
<div id="main" style="width: 1200px; height: 600px;"></div>
<!-- js代碼 -->
<script type="text/javascript">
/*基於準備好的dom，初始化echarts實例*/
var myChart = echarts.init(document.getElementById('main'));
var upColor = '#ec0000';
var downColor = '#00da3c';
function splitData(data) {
var categoryData = [];
var values = [];
var volumes = [];
for (var i = 0; i < data1.length; i++) {
categoryData.push(data1[i].splice(0, 1)[0]);
values.push(data1[i]);
volumes.push([i, data1[i][4], data1[i][0] > data1[i][1] ? 1 : -1]);
}
return {
categoryData: categoryData,
values: values,
volumes: volumes
};
}
function calculateMA(dayCount, data) {
var result = [];
for (var i = 0, len = data.values.length; i < len; i++) {
if (i < dayCount) {
result.push('-');
continue;
}
var sum = 0;
for (var j = 0; j < dayCount; j++) {
sum += data.values[i - j][1];
}
result.push(+(sum / dayCount).toFixed(3));
}
return result;
}
$.ajax({
url:'http://127.0.0.1:8000/api/data/',
type:'get',
data:{code:'300760'},
dataType:'json',
async:false,
success:function (resData) {
data1 = resData.data.datastr;
codeName = resData.name;
}
});
var data = splitData(data1);
myChart.setOption(option = {
backgroundColor: '#fff',
animation: false,
legend: {
bottom: 10,
left: 'center',
data: ['Dow-Jones index', 'MA5', 'MA10', 'MA20', 'MA30']
},
title: {
text:codeName,
x: 'center', // 水平安放位置，默認爲左對齊，可選爲：
// 'center' ¦ 'left' ¦ 'right'
// ¦ {number}（x座標，單位px）
y: 'top', // 垂直安放位置，默認爲全圖頂端，可選爲：
// 'top' ¦ 'bottom' ¦ 'center'
// ¦ {number}（y座標，單位px）
//textAlign: null // 水平對齊方式，默認根據x設置自動調整
backgroundColor: 'rgba(0,0,0,0)',
borderColor: '#ccc', // 標題邊框顏色
borderWidth: 0, // 標題邊框線寬，單位px，默認爲0（無邊框）
padding: 5, // 標題內邊距，單位px，默認各方向內邊距爲5，
// 接受數組分別設定上右下左邊距，同css
itemGap: 10, // 主副標題縱向間隔，單位px，默認爲10，
textStyle: {
fontSize: 18,
fontWeight: 'bolder',
color: 'blue' // 主標題文字顏色
},
subtextStyle: {
color: '#aaa' // 副標題文字顏色
}
},
tooltip: {
trigger: 'axis',
axisPointer: {
type: 'cross'
},
backgroundColor: 'rgba(245, 245, 245, 0.8)',
borderWidth: 1,
borderColor: '#ccc',
padding: 10,
textStyle: {
color: '#000'
},
position: function (pos, params, el, elRect, size) {
var obj = {top: 10};
obj[['left', 'right'][+(pos[0] < size.viewSize[0] / 2)]] = 30;
return obj;
}
// extraCssText: 'width: 170px'
},
axisPointer: {
link: {xAxisIndex: 'all'},
label: {
backgroundColor: '#777'
}
},
toolbox: {
feature: {
dataZoom: {
yAxisIndex: false
},
brush: {
type: ['lineX', 'clear']
}
}
},
brush: {
xAxisIndex: 'all',
brushLink: 'all',
outOfBrush: {
colorAlpha: 0.8
}
},
visualMap: {
show: false,
seriesIndex: 5,
dimension: 2,
pieces: [{
value: 1,
color: downColor
}, {
value: -1,
color: upColor
}]
},
grid: [
{
left: '10%',
right: '8%',
height: '50%'
},
{
left: '10%',
right: '8%',
top: '63%',
height: '16%'
}
],
xAxis: [
{
type: 'category',
data: data.categoryData,
scale: true,
boundaryGap : false,
axisLine: {onZero: false},
splitLine: {show: false},
splitNumber: 20,
min: 'dataMin',
max: 'dataMax',
axisPointer: {
z: 100
}
},
{
type: 'category',
gridIndex: 1,
data: data.categoryData,
scale: true,
boundaryGap : false,
axisLine: {onZero: false},
axisTick: {show: false},
splitLine: {show: false},
axisLabel: {show: false},
splitNumber: 20,
min: 'dataMin',
max: 'dataMax'
// axisPointer: {
// label: {
// formatter: function (params) {
// var seriesValue = (params.seriesData[0] || {}).value;
// return params.value
// + (seriesValue != null
// ? '\n' + echarts.format.addCommas(seriesValue)
// : ''
// );
// }
// }
// }
}
],
yAxis: [
{
scale: true,
splitArea: {
show: true
}
},
{
scale: true,
gridIndex: 1,
splitNumber: 2,
axisLabel: {show: false},
axisLine: {show: false},
axisTick: {show: false},
splitLine: {show: false}
}
],
dataZoom: [
{
type: 'inside',
xAxisIndex: [0, 1],
start: 70,
end: 100
},
{
show: true,
xAxisIndex: [0, 1],
type: 'slider',
top: '85%',
start: 98,
end: 100
}
],
series: [
{
name: 'Dow-Jones index',
type: 'candlestick',
data: data.values,
itemStyle: {
normal: {
color: upColor,
color0: downColor,
borderColor: null,
borderColor0: null
}
},
tooltip: {
formatter: function (param) {
param = param[0];
return [
'Date: ' + param.name + '<hr size=1 style="margin: 3px 0">',
'Open: ' + param.data[0] + '<br/>',
'Close: ' + param.data[1] + '<br/>',
'Lowest: ' + param.data[2] + '<br/>',
'Highest: ' + param.data[3] + '<br/>'
].join('');
}
}
},
{
name: 'MA5',
type: 'line',
data: calculateMA(5, data),
smooth: true,
lineStyle: {
normal: {opacity: 0.5}
}
},
{
name: 'MA10',
type: 'line',
data: calculateMA(10, data),
smooth: true,
lineStyle: {
normal: {opacity: 0.5}
}
},
{
name: 'MA20',
type: 'line',
data: calculateMA(20, data),
smooth: true,
lineStyle: {
normal: {opacity: 0.5}
}
},
{
name: 'MA30',
type: 'line',
data: calculateMA(30, data),
smooth: true,
lineStyle: {
normal: {opacity: 0.5}
}
},
{
name: 'Volume',
type: 'bar',
xAxisIndex: 1,
yAxisIndex: 1,
data: data.volumes
}
]
}, true);
// myChart.on('brushSelected', renderBrushed);
// function renderBrushed(params) {
// var sum = 0;
// var min = Infinity;
// var max = -Infinity;
// var countBySeries = [];
// var brushComponent = params.brushComponents[0];
// var rawIndices = brushComponent.series[0].rawIndices;
// for (var i = 0; i < rawIndices.length; i++) {
// var val = data.values[rawIndices[i]][1];
// sum += val;
// min = Math.min(val, min);
// max = Math.max(val, max);
// }
// panel.innerHTML = [
// '<h3>STATISTICS:</h3>',
// 'SUM of open: ' + (sum / rawIndices.length).toFixed(4) + '<br>',
// 'MIN of open: ' + min.toFixed(4) + '<br>',
// 'MAX of open: ' + max.toFixed(4) + '<br>'
// ].join(' ');
// }
myChart.dispatchAction({
type: 'brush',
areas: [
{
brushType: 'lineX',
coordRange: ['2016-06-02', '2016-06-20'],
xAxisIndex: 0
}
]
});
</script>
</body>
</html>