PHP封装的JpGraph类

在前面的JpGraph下载及使用中， 我对JpGraph项目进行了大概的介绍，并对一个简单样例程序进行了说明，下面是我经过1天的编写调试，整理出来的已经封装了部分常见常用函数的类，感 觉自己这个写的还是比较规范的，呵呵。下面是代码，想学php的可以深入看一下，并不太难，不过由于时间关系，我并没有把所有的图形对象进行封装，如果有 机会以后会出一个更全的类。

下面是具体的代码内容：

<?php

/**
* 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。
* ==============================================================
* $Author: 红心草 ([email protected]) $
* $WebSite: http://www.hongxincao.com
* $id: cls_jpgraph.php 2010-10-03 14:20 hongxincao $
**/

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();
}
}

?>

上面的类文件对JpGraph库文件进行了封装，减低了JpGraph库程序调用的难度，对于创建图形只需要简单的几行代码就可以实现了，具体大家可以仔细读一下代码（JpGraph库文件需要单独下载，如果你不清楚下载地址的话，可以查看我的上一篇文章：JpGraph下载及使用）。

本来还想继续写点内容，发现光代码就够多了，在这篇文章中就不多说了。在下一篇文章中，我会写一个具体的测试程序来详细介绍说明该类文件的调用，如果有想详细了解JpGraph库使用的话，可以随时关注我的红心草博客。

文章来源：红心草博客

原文地址：http://www.hongxincao.com/archives/330.html