CI中使用pChart绘制图表,支持多种图表

因为一个codeigniter开发的项目上要用到图表。FusionChart是flash技术，在某些情况下可能造成无法使用(如ipad)。因此不禁想起了之前用Pchart做的图表项目。
但是毕竟是在CI里，有时候为了吻合框架的特性，不得不去迁就而修改自己的代码。
最初我的想法是把Pchart的类文件放在libraries文件里，然后在controllers控制器里调用，可以总是出现各种错误。尝试了很多次都是失败，难道在CI里用Pchart这么难？！！！
于是去百度+谷歌上去找相关的资料。找到了N多篇相同的标题为“在CI中使用pChart库”这类的文章，并且内容都95%惊人的相似。看来世界的确是大同了，思想都一样了(不太喜欢贴别人文章不表明转载的，人家博主写篇文章多费劲啊，你这得了便宜还卖乖，粘贴下成自己的了。).
好吧，看下思路，大致是在libraries里多创建一个类，来调用Pchart的类，进而达到使用目的。不知道大伙有没有测试，不过我这边测试的时候总有问题，于是心里很着急，又尝试了很多次，还是失败。于是就想自己写算了。不过还是运用了网络上文章的思路。即把Pchart类包放置于libraries下。但是调用类中的方法确实自己运用之前非CI框架下的方法。
目录架构类似于这样：
--demoweb
  --application
    --....
    --libraries
      --pChart
--pChart的众类文件
      --Mychart.php
    --...
  --system

  个人是把字体都和Pchart的类文件都放在pChart这个目录里的。等下看代码的时候大家就会注意到了。
  下面贴出来Mychart.php(即调用的pchart的类文件)，以及控制器里方法的测试示例代码：

Mychart.php示例代码：

 
<?php  if (!defined('BASEPATH')) exit('No direct script access allowed'); 
/**
* FOR:调用pchart类绘制图表
*  @author  cheng.yafei
*  @version 1.0
**/
class Mychart {
  
/**
* FOR:画图，立体饼图
*  @param $dataArray 详细票数数组
*  @param $reportArr 详细票数对应选项数组
**/
function draw3DPieImage($dataArray, $lableArray)
{
  include(dirname(__FILE__)."/pChart/pData.class");
  include(dirname(__FILE__)."/pChart/pChart.class");
 
  $datanum = $dataArray;
  $dataname = $lableArray;
  
  // Dataset definition 
  $DataSet = new pData;
  $DataSet->AddPoint($datanum,"Serie1");
  $DataSet->AddPoint($dataname,"Serie2");
  $DataSet->AddAllSeries();
  $DataSet->SetAbsciseLabelSerie("Serie2");
  
  $Test = new pChart(420,220);
  $Test->drawFilledRoundedRectangle(7,7,415,213,5,240,240,240);//灰色圆角背景
  $Test->drawRoundedRectangle(5,5,417,215,5,230,230,230);//灰色圆角框
 
  // Draw the pie chart
  $Test->setFontProperties(dirname(__FILE__)."/pChart/yahei.ttf",8);
  $Test->drawPieGraph($DataSet->GetData(),$DataSet->GetDataDescription(),150,90,110,PIE_PERCENTAGE,TRUE,50,20,5);
  $Test->drawPieLegend(310,15,$DataSet->GetData(),$DataSet->GetDataDescription(),250,250,250);
  $totalStr = '(共'.array_sum($datanum).'票)';
  $Test->drawTitle(20,20,$totalStr,50,50,50,380);//标题；drawTitle(20,20,参数名,50,50,50,380)   20左边距，
  
  $rand = rand(100,300);
  $image_name = $rand.'_3dpie.png';
  $image_file_name = dirname(dirname(dirname(__FILE__))).'/actpic/'.$image_name; 
  
  $Test->Render($image_file_name);
//  header("content-type:text/html;charset=utf-8;");
  echo dirname(dirname(dirname(__FILE__))).'/actpic'."<br>";
   echo "<h3>饼图:</h3><img src='http://localhost/repaction/actpic/".$image_name."'><br>";
}//end function draw3DPieImage 立体饼图
 
/*******************************
*   FOR:画图，分离的饼图
*  @param $dataArray 详细票数数组
*  @param $reportArr 详细票数对应选项数组
********************************/
function drawDepartPieImage($dataArray, $lableArray)
{  
   include(dirname(__FILE__)."/pChart/pData.class");
    include(dirname(__FILE__)."/pChart/pChart.class");
  
   $datanum = $dataArray;
   $dataname = $lableArray;
   
   // Dataset definition 
   $DataSet = new pData;
   $DataSet->AddPoint($datanum,"Serie1");//投票数字
   $DataSet->AddPoint($dataname,"Serie2");//对应文本
   $DataSet->AddAllSeries();
   $DataSet->SetAbsciseLabelSerie("Serie2");
  
   // Initialise the graph
   $Test = new pChart(370,220);//(长，宽)画布长宽
   $Test->drawFilledRoundedRectangle(7,7,353,213,5,240,240,240);//灰色圆角背景
   $Test->drawRoundedRectangle(5,5,355,215,5,230,230,230);//灰色圆角框
   // Draw the pie chart
   $Test->setFontProperties(dirname(__FILE__)."/pChart/yahei.ttf",8);
   $Test->AntialiasQuality = 0;
   $Test->drawFlatPieGraph($DataSet->GetData(),$DataSet->GetDataDescription(),120,100,60,PIE_PERCENTAGE,10);//画饼图
   $Test->drawPieLegend(230,15,$DataSet->GetData(),$DataSet->GetDataDescription(),250,250,250);//画选项图
   $totalStr = '(共'.array_sum($datanum).'票)';
   $Test->drawTitle(20,20,$totalStr,50,50,50,380);//标题；drawTitle(20,20,参数名,50,50,50,380)   20左边距，  
   
   $rand = rand(100,300);
   $image_name = $rand.'_departpie.png';
   $image_file_name = dirname(dirname(dirname(__FILE__))).'/actpic/'.$image_name; 
   
   $Test->Render($image_file_name);
   
   echo "<h3>离散饼图:</h3><img src='http://localhost/repaction/actpic/".$image_name."'><br>";
}// end drawDepartPieImage
/*******************************
*  FOR:画图，柱状图
*  @param $dataArray 详细票数数组
*  @param $reportArr 详细票数对应选项数组
********************************/
function drawBarImage($dataArray, $lableArray)
{
   include(dirname(__FILE__)."/pChart/pData.class");
    include(dirname(__FILE__)."/pChart/pChart.class");
  
   // Dataset definition    
   $DataSet = new pData;
   foreach($dataArray as $k=>$v){
   $DataSet->AddPoint($v, "Serie".$k);
   $DataSet->SetSerieName($lableArray[$k], "Serie".$k);
   }
   $DataSet->AddAllSeries();
   $DataSet->SetAbsciseLabelSerie();
  
   // Initialise the graph
   $Test = new pChart(700,230);
   $Test->setFontProperties(dirname(__FILE__)."/pChart/yahei.ttf",8);
   $Test->setGraphArea(50,30,550,200);
   $Test->drawFilledRoundedRectangle(7,7,693,223,5,240,240,240);
   $Test->drawRoundedRectangle(5,5,695,225,5,230,230,230);
   $Test->drawGraphArea(255,255,255,TRUE);
   $Test->drawScale($DataSet->GetData(),$DataSet->GetDataDescription(),SCALE_NORMAL,150,150,150,TRUE,0,2,TRUE);
   $Test->drawGrid(4,TRUE,230,230,230,50);
  
   // Draw the 0 line
   $Test->setFontProperties(dirname(__FILE__)."/pChart/yahei.ttf",6);
   $Test->drawTreshold(0,143,55,72,TRUE,TRUE);
  
   // Draw the bar graph
   $Test->drawBarGraph($DataSet->GetData(),$DataSet->GetDataDescription(),TRUE);
  
   // Finish the graph
   $Test->setFontProperties(dirname(__FILE__)."/pChart/yahei.ttf",8);
//   $Test->drawLegend(596,150,$DataSet->GetDataDescription(),255,255,255);
   $Test->drawLegend(580,30,$DataSet->GetDataDescription(),255,255,255);//(左边距，上边距，描述....)
   $Test->setFontProperties(dirname(__FILE__)."/pChart/yahei.ttf",10);
   $Test->drawTitle(50,22,"投票",50,50,50,585);
     
     $rand = rand(100,300);
   $image_name = $rand.'_zhuzhuang.png';
   $image_file_name = dirname(dirname(dirname(__FILE__))).'/actpic/'.$image_name; 
   
   $Test->Render($image_file_name);
   
   echo "<h3>离散饼图:</h3><img src='http://localhost/repaction/actpic/".$image_name."'><br>";
    
   
}//end function drawBarImage 柱状图
 
}//END class
 

然后再在控制器的方法里调用这个类使用：

 
 function test(){
     $this->load->library('mychart'); //载入pChart库
     
 $dataArray = array('54','95','158','241','19');
 $lableArray = array('成龙','施瓦辛格','龙格尔','史泰龙','李连杰');
 
 $this->mychart->draw3DPieImage($dataArray,$lableArray);
   
 }//end function
 
 function test2(){
     $this->load->library('mychart'); //载入pChart库
     
 $dataArray = array('555','95','158','241','19');
 $lableArray = array('黄家驹','平克弗洛伊德','谭咏麟','张学友','刘德华');
 
 $this->mychart->drawDepartPieImage($dataArray,$lableArray);
   
 }//end function
 function test3(){
     $this->load->library('mychart'); //载入pChart库
     
 $dataArray = array('369','95','158','241','19');
 $lableArray = array('黄家驹','平克弗洛伊德','谭咏麟','张学友','刘德华');
 
 $this->mychart->drawBarImage($dataArray,$lableArray);
   
 }//end function
 
 

测试代码，稍微显的有些凌乱，大体是这个思路。

 

在项目使用过程中，大家注意字体的调用的路径。