ext 图表

[xix17]

我的图表有几根线要显示,
然后我想把那几跟线的颜色分别表示什么显示出来

如:图表上有2个线一个线的表示最大值,一根绿的表示最小值,然后我想把这两根线的颜色放旁边标示出来这些线表示什么意思..

new Ext.Panel({
iconCls:'chart',
title: 'ExtJS.com Visits and Pageviews, 2007/2008 (Full styling)',
frame:true,
renderTo: 'container',
width:500,
height:300,
layout:'fit',

items: {
xtype: 'columnchart',
store: store,
url:'../../resources/charts.swf',
xField: 'name',
yAxis: new Ext.chart.NumericAxis({
displayName: 'Visits',
labelRenderer : Ext.util.Format.numberRenderer('0,0')
}),
tipRenderer : function(chart, record, index, series){
if(series.yField == 'visits'){
return Ext.util.Format.number(record.data.visits, '0,0') + ' visits in ' + record.data.name;
}else{
return Ext.util.Format.number(record.data.views, '0,0') + ' page views in ' + record.data.name;
}
},
chartStyle: {
padding: 10,
animationEnabled: true,
font: {
name: 'Tahoma',
color: 0x444444,
size: 11
},
dataTip: {
padding: 5,
border: {
color: 0x99bbe8,
size:1
},
background: {
color: 0xDAE7F6,
alpha: .9
},
font: {
name: 'Tahoma',
color: 0x15428B,
size: 10,
bold: true
}
},
xAxis: {
color: 0x69aBc8,
majorTicks: {color: 0x69aBc8, length: 4},
minorTicks: {color: 0x69aBc8, length: 2},
majorGridLines: {size: 1, color: 0xeeeeee}
},
yAxis: {
color: 0x69aBc8,
majorTicks: {color: 0x69aBc8, length: 4},
minorTicks: {color: 0x69aBc8, length: 2},
majorGridLines: {size: 1, color: 0xdfe8f6}
}
},
series: [{
type: 'column',
displayName: 'Page Views',
yField: 'views',
style: {
image:'bar.gif',
mode: 'stretch',
color:0x99BBE8
}
},{
type:'line',
displayName: 'Visits',
yField: 'visits',
style: {
color: 0x15428B
}
}]
}
});