Ajax+Jpgraph实现的动态折线图功能示例

本文实例讲述了Ajax+Jpgraph实现的动态折线图功能。分享给大家供大家参考，具体如下：

一代码

fun.js：

var i=1;
function progress(){
  setInterval("beginProgress()", 600);
}
function beginProgress(){
 $("#img").attr("src", "img.php?m="+i);
 i++;
 if(i =12){
   i=1;
 }
}

index.php：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" 
<html xmlns="http://www.w3.org/1999/xhtml" 
<head 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" / 
<title Ajax+Jpgraph制作动态折线图</title 
</head 
<script language="javascript" src="js/jquery-1.3.2.js" </script 
<script language="javascript" src="js/fun.js" </script 
<body 
  <img id="img" src="img.php?m=0" / 
 <br 
 <input type="button" value="开始" onclick="progress()"/ 
</body 
</html

img.php：

<?php
require_once 'src/jpgraph.php';   //导入Jpgraph类库
require_once 'src/jpgraph_line.php';   //导入Jpgraph类库的柱状图功能
$dataTmp = array(56, 78, 34, 65, 89, 24 ,67 ,88, 45, 68, 70, 50);   //设置统计数据
$data1 = array(0, 0, 0, 0, 0, 0 ,0 ,0, 0, 0, 0, 0);   //设置统计数据
$m = $_GET['m'];
for($i=0; $i<$m; $i++){
  $data1[$i] = $dataTmp[$i];
}
$graph = new Graph(500, 320);
$graph- SetScale("textlin");
$graph- SetShadow();
$graph- img- SetMargin(40, 30, 30, 70);
$graph- title- Set("图书销售走势表");
$lineplot1 = new LinePlot($data1);
$graph- Add($lineplot1);
$graph- xaxis- title- Set("月份");
$graph- yaxis- title- Set("book A销售金额（万元）");
$graph- title- SetFont(FF_SIMSUN, FS_BOLD);
$graph- yaxis- title- SetFont(FF_SIMSUN, FS_BOLD);
$graph- xaxis- title- SetFont(FF_SIMSUN, FS_BOLD);
$lineplot1- SetColor('red');
$lineplot1- SetLegend('book A');
$graph- legend- SetLayout(LEGEND_HOR);
$graph- legend- Pos(0.4, 0.95, 'center', 'bottom');
$graph- Stroke();

二运行结果