Extjs4--曲线Line Charts使用详解
在项目中，我们经常要使用曲线来显示变化趋势。
下面说明一下Line Charts的使用。
源码：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="../ext-all.js"></script>
<link rel="stylesheet" type="text/css" href="../resources/css/ext-all-debug.css" />
<title>Insert title here</title>
<script type="text/javascript">
Ext.onReady(function(){
//1. Creating a Store
Ext.define('WeatherPoint', {
extend: 'Ext.data.Model',
fields: ['min_temperature','avg_temperature','max_temperature','month']
});
//Store
var store = Ext.create('Ext.data.Store', {
model: 'WeatherPoint',
data: [
{ min_temperature: 58,avg_temperature: 65,max_temperature:80, month: 1 },
{ min_temperature: 59,avg_temperature: 67,max_temperature:83, month:2 },
{ min_temperature: 53,avg_temperature: 67,max_temperature:89, month: 3 },
{ min_temperature: 52,avg_temperature: 60,max_temperature:80, month: 4 },
{ min_temperature: 58,avg_temperature: 68,max_temperature:80, month: 5 },
{ min_temperature: 58,avg_temperature: 67,max_temperature:82, month: 6 },
{ min_temperature: 58,avg_temperature: 70,max_temperature:80, month: 7 },
{ min_temperature: 59,avg_temperature: 70,max_temperature:95, month: 8 }
]
});
//2. Creating the Chart object
Ext.create('Ext.chart.Chart', {
renderTo: Ext.getBody(),
width: 700,
//不产生动画
animate: false,
//不产生阴影
shadow: false,
height: 300,
store: store,
//图例显示在底端
legend: {
position: 'bottom'
},
//3. Configuring the Axes(指定X/Y轴)
axes: [
{
title: 'Temperature',
//Y轴显示在左端，类型是数字
type: 'Numeric',
position: 'left',
minorTickSteps: 1,
grid: {
//面板条纹效果设置
odd: {
opacity: 1,
fill: '#eee',
stroke: '#bbb',
'stroke-width': 0
}
},
//y轴有三条曲线
fields: ['min_temperature','avg_temperature','max_temperature'],
//y轴的最大最小值
minimum: 0,
maximum: 100
},{
//X轴在底端
title: 'Month',
type: 'Numeric',
position: 'bottom',
fields: ['month'],
minimum: 1,
maximum: 9
}
],
//4. Configuring the Series(定义显示的曲线)
series: [
{
type: 'line',//直线
//当鼠标 悬浮时，高亮显示
highlight: {
size: 7,
radius: 7
},
style: {
stroke: '#00F5FF',//曲线颜色
'stroke-width': 2,//曲线宽度
fill: '#00F5FF',
opacity: 0.5 //曲线颜色透明度
},
tips: {
//跟踪鼠标
trackMouse: true,
width: 150,
height: 28,
renderer: function(storeItem, item) {
this.setTitle('月份：'+ storeItem.get('month')+
' 温度:' + storeItem.get('min_temperature'));
}
},
xField: 'month',
yField: 'min_temperature',//最低温度曲线
markerConfig: {
type: 'cross',
size: 4,
radius: 4,
'stroke-width': 0
}
},{
type: 'line',
highlight: {
size: 7,
radius: 7
},
style: {
stroke: '#EE4000',
'stroke-width': 2,
fill: '#EE4000',
opacity: 0.5
},
tips: {
trackMouse: true,
width: 150,
height: 28,
renderer: function(storeItem, item) {
this.setTitle('月份：'+ storeItem.get('month')+
' 温度:' + storeItem.get('avg_temperature'));
}
},
xField: 'month',
yField: 'avg_temperature',//平均温度曲线
markerConfig: {
type: 'circle',
size: 4,
radius: 4,
'stroke-width': 0
}
},{
type: 'line',
highlight: {
size: 7,
radius: 7
},
style: {
stroke: '#008B00',
'stroke-width': 2,
fill: '#008B00',
opacity: 0.5
},
tips: {
trackMouse: true,
width: 150,
height: 28,
renderer: function(storeItem, item) {
this.setTitle('月份：'+ storeItem.get('month')+
' 温度:' + storeItem.get('max_temperature'));
}
},
xField: 'month',
yField: 'max_temperature',//最高温度曲线
markerConfig: {
type: 'circle',
size: 4,
radius: 4,
'stroke-width': 0
}
}
]
});
});
</script>
</head>
<body>
</body>
</html>
运行结果：
鼠标悬浮时，曲线加粗，可以显示tip
