jpgraph 生成类型数据以图表，走势图的形式表现出来

/**
 *  ecshop jpgraph图表类库
 *  ==============================================================
 *  利用开源的jpgraph库实现对各类型数据以图表，走势图的形式表现出来。
 *  ==============================================================
**/

class cls_jpgraph
{
 var $db = null;
 var $ydata = array();
 var $width = 350;
 var $height = 250;

 var $graph = ''; //图形对象
 var $piegraph = ''; //丙状图形

 var $lineplot = ''; //线性对象
 var $barpot = ''; //柱状对象
 var $gbplat = ''; //柱状组对象
 var $txt = '';  //文本对象
 var $p1 = '';  //丙状图对象

 var $scale = ''; //图表类型? (textlin,textlog,intlin)
 var $yscale = '';   // (log,)
 var $xgrid = false; //x轴网格显示
 var $ygrid = false; //y轴网格显示
 var $title = ''; //标题
 var $subtitle = ''; //子标题(一般为日期)
 var $xaxis = ''; //x轴名称
 var $yaxis = ''; //y轴名称

 /*margin position*/
 var $left = 0;
 var $right = 0;
 var $top = 0;
 var $bottom = 0;

 /**
 *构造函数
 */
 function cls_jpgraph($width=350,$height=250)
 {
  $this->width = $width;
  $this->height = $height;

  $this->graph = new graph($this->width,$this->height);

 }

 /**
 * 图表类库的构造函数
 *
 */
 /*
 function __construct($parms,$width,$height)
 {
  cls_jpgraph($parms,$width,$height);
 }
 */

 /*图片基本信息设置*/
 function set_jpgraph($scale='intlin',$title='',$subtitle='',$bgcolor='',$xaxis='',
               $yaxis='',$xgrid=false,$ygrid=false,$margin='') {

  $this->scale = $scale;
  $this->title = $title;
  $this->subtitle = $subtitle;
  $this->xaxis = $xaxis;
  $this->yaxis = $yaxis;
  $this->xgrid = $xgrid;
  $this->ygrid = $ygrid;

  if(!empty($scale)) {
   $this->graph->setscale($this->scale);
  }
  else {
  $this->graph->setscale('intlin');
  }
  $this->graph->xgrid->show($this->xgrid,$this->xgrid);
  $this->graph->ygrid->show($this->ygrid,$this->ygrid);

  if(!empty($bgcolor)) {
   $this->graph->setmargincolor($bgcolor);
  }

  /*如果手工设置了图片位置*/
  if(is_array($margin)) {
   while(list($key,$val) = each($margin)) {
    $this->$key = $val;
   }
   $this->graph->setmargin($this->left,$this->right,$this->top,$this->bottom);
  }

  if(!empty($this->title)) {
   $this->graph->title->set($this->title);
  }
  if(!empty($this->subtitle)) {
   $this->graph->subtitle->set($this->subtitle);
  }
  else {
   $this->graph->subtitle->set('('.date('y-m-d').')'); //默认子标题设置为当前日期
  }
  if(!empty($this->xaxis)) {
   $this->graph->xaxis->title->set($this->xaxis);
  }
  if(!empty($this->yaxis)) {
   $this->graph->yaxis->title->set($this->yaxis);
  }

 }

 /*创建线性关系图表(linear plot)*/
 function create_lineplot($parms,$color='black',$weight=1)
 {
  $this->ydata = $parms;
  $this->lineplot = new lineplot($this->ydata);
  $this->lineplot->setcolor($color);
  $this->lineplot->setweight($weight);

  return $this->lineplot;
 }

 /*创建柱状图表(bar pot)*/
 function create_barpot($parms,$color='black',$width='0')
 {
  $this->ydata = $parms;
  $this->barpot = new barplot($this->ydata);
  $this->barpot->setfillcolor($color);
  if(!empty($width)) {
   $this->barpot->setwidth($width);
  }

  return $this->barpot;
 }

 /*创建数据柱状图表组*/
 function create_bargroup($plotarr,$width='0.8')
 {
  $this->gbplot = new groupbarplot($plotarr);
  $this->gbplot->setwidth($width);

  return $this->gbplot;
 }

 /*创建文本内容*/
 function create_text($str,$postion='',$color='black')
 {
  $this->txt = new text($str);

  if(is_array($postion)) {
   while(list($key,$val) = each($postion)) {
    $this->$key = $val;
   }
   $this->txt->setpos($this->left,$this->top);
  }
  else {
   $this->txt->setpos(10,20);
  }
  $this->txt->setcolor($color);

  $this->graph->add($this->txt);
 }

 /*创建丙状图表*/
 function create_pie($parms,$title,$type='3d',$size='0.5',$center='0.5',$width='350',$height='250')
 {
  $this->width = $width;
  $this->height = $height;

  $this->piegraph = new piegraph(300,200);
  $this->piegraph->setshadow();

  $this->piegraph->title->set($title);

  if('3d' != $type) {
   $this->p1 = new pieplot($parms);
   $this->piegraph->add($this->p1);
  }
  else {
   $this->p1 = new pieplot3d($parms);
   $this->p1->setsize($size);
   $this->p1->setcenter($center);
//   $this->p1->setlegends($gdatelocale->getshortmonth());
   $this->piegraph->add($this->p1);
  }
  $this->piegraph->stroke();
 }

 function get_auth_code($length=4)
 {
  $spam = new antispam();
  $chars = $spam->rand($length);

  if( $spam->stroke() === false ) {
   return false;
  }

  return $chars;
 }

 /*完成图形创建并显示*/
 function display($obj)
 {
  $this->graph->add($obj);
  $this->graph->stroke();
 }
}

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