Ext图表：解决报表中关键问题与X轴Y轴优化

new Ext.Panel({ 

iconCls : 'chart',// 样式 

title : 'ExtJS.com Visits and Pageviews, 2007/2008 (复杂样式)', 

frame : true, 

renderTo : 'container', width : 500, height : 300, layout : 'fit',

 items : {

                       xtype : 'columnchart',// 柱状图 

                       store : json_store, 

                         url : '../extjs/resources/charts.swf',

                        xField : 'name',// X轴显示的值 

                         yAxis : new Ext.chart.NumericAxis({ displayName : 'Visits',

                                                       labelRenderer : Ext.util.Format .numberRenderer('0,0') }), // Y 轴显示的值                      

                       tipRenderer : function(chart, record, index, series) {// tip渲染 

                                                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,// 是否支持动态数据变化 

                       font : {// 图表整体字体 name : 'Tahoma', color : 'silver', size : 11 }, 

                       border : { // color:'#3399FF', // size:1 },

                       background : { color : '#CCCCCC',// 背景颜色 

                        alpha : 0.1 // 透明度 // image: // mode:stretch }, 

legend : {// 图例 

                       display : "bottom", spacing : 2, padding : 5,

                       font : { name : 'Tahoma', color : '#3366FF', size : 12, bold : true} },

 dataTip : { // 鼠标经过,数据提示样式 padding : 5,// 提示内容与边框的距离 border : { color : "#FF3333", size : 1 },background : { color : 0xDAE7F6,// 背景颜色透明度 alpha : .8 // 背景颜色透明度 }, font : { name : 'Tahoma', color : '#FF3300', size : 10, bold : true} }, 

xAxis : { // X 轴 color : 0x69aBc8, // X轴颜色 

                       majorTicks : {// 大刻度值 color : 0x69aBc8, length : 4 }, 

                        minorTicks : {// 小刻度值 color : 0x69aBc8, length : 2 }, 

                        majorGridLines : { size : 1, color : '#999999'}, // showLabels:false, labelDistance : 4 },

 yAxis : { color : 0x69aBc8, majorTicks : {// 大刻度值 color : 0x69aBc8, length : 4 }, minorTicks : {// 小刻度值 color : 0x69aBc8, length : 2 }, majorGridLines : { size : 1, color : '#999999'} } },