php生成图形(Libchart)实例
统计图形就我们会常到的数据图形了,如果三个数组以图形显示或楼盘以图形走向我们都会要用到图形,下面我来介绍一个php LIbchart图形生成类吧,很用的有需要的朋友可参考。 代码如下: /* update by Leo It's draw the pic of Sheet,and it will take all the num on the pic. */ require "./libchart/classes/libchart.php"; class drawPic{ var $chart; var $style; function drawPic($style="1",$width="500",$height="250"){ $this->style=$style; if($style==1){ //cylinder $this->chart = new VerticalBarChart($width,$height); }else if($style==2){ //line $this->chart = new LineChart($width,$height); }else if($style==3){ //Lump $this->chart = new PieChart($width,$height); }else{ //cross $this->chart=new HorizontalBarChart($width,$height); } } function draw($obj){ if($this->style==1||$this->style=="1"){ //cylinder $dataSet = new XYDataSet() ; $this->chart->setTitle($obj->title);//title $arr=array(); $arr=$obj->dataArray; foreach($arr as $key => $val){ $dataSet->addPoint ( new Point($key,$val)) ; } $this->chart->setDataSet ( $dataSet ) ; $this->chart->render(); }else if($this->style==2||$this->style=="2"){ //line $this->chart->setTitle($obj->title);//title $arr=array(); $arr=$obj->dataArray; $i=0; $dataSet = new XYSeriesDataSet(); foreach($arr as $key => $val){ $serie{$i}= new XYDataSet(); foreach($val as $k => $v){ $serie{$i}->addPoint(new Point($k,$v)); } $dataSet->addSerie($key,$serie{$i}); $i=$i+1; } $this->chart->setDataSet($dataSet); $this->chart->render(); }else if($style==3){ //Lump $dataSet = new XYDataSet() ; $this->chart->setTitle($obj->title);//title $arr=array(); $arr=$obj->dataArray; foreach($arr as $key => $val){ $dataSet->addPoint ( new Point($key."($val)",$val)) ; } $this->chart->setDataSet ( $dataSet ) ; $this->chart->render(); }else{ //cross $dataSet = new XYDataSet(); $this->chart->setTitle($obj->title);//title $arr=array(); $arr=$obj->dataArray; foreach($arr as $key => $val){ $dataSet->addPoint ( new Point($key,$val)) ; } $this->chart->setDataSet($dataSet); $this->chart->render(); } }} class kkk{}; $n=new drawPic("4");//it will set 1 or 2 or 3 or 4 $k=new kkk(); $k->dataArray=array("2000"=>"30","2001"=>"40","2002"=>"50","2003"=>"60","2004"=>"70","2005"=>"80","20020"=>"90");//style==1 or style=2 or style=4 //$k->dataArray=array("2000"=>"30","20020"=>"90");//style==3 //$k->dataArray=array("yi"=>array("2000"=>"30","2004"=>"60"),"er"=>array("2003"=>"60","20020"=>"90"),"san"=>array("33"=>"12","45"=>"56","89"=>"45","86"=>"49"));//style==2 and the years will show first array to block.(it will be show 2000 2001 2002 2004) $k->title="The Sheet title"; $n->draw($k); ?> 红色字体为调用。方法1,2,4为相同的数组。3为线性图,有可能有两条线或者多条线的比较(也可以单线)。 如果要使用中文可能会发现libchart中文乱码 了,下面找了一个办法 我们的应用主源代码如下: 代码如下: header("content-type:image/png"); require_once('libchart/classes/libchart.php'); $chart = new VerticalBarChart( 500,250 ) ; // 参数表示需要创建的图像的宽和高 $dataSet = new XYDataSet() ; // 实例化一个 XY 轴数据对象 // 为这个对象增加四组数据集合, Point 对象的第一个参数表示 X 轴坐标, $dataSet -> addPoint ( new Point( "Jan 2005",273 )) ; 标红字的地方是为了解决中文乱码的。 2、标题乱码: 默认显示中文是乱码,这是由于编码的原因,做如下修改: 首先,更改libchar/libchart/classes/view/chart/Chart.php,找到如下内容: 代码如下: public function setTitle($title) { $this->plot->setTitle($title); } 更改为: 代码如下: public function setTitle($title) { $title = mb_convert_encoding($title,"utf-8" ); $this->plot->setTitle($title); } 第三步:就是上面某个博客里讲到的: 1、自己写的使用Libchart 库生成图表的php 文件以utf-8编码保存 2、找几个中文字体库,比如华文行楷、宋体等等,复制到libchart fonts目录下 3、修改libchart classes目录下的text.php 文件 第47、48行 代码如下: $this->fontCondensed = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed.ttf"; $this->fontCondensedBold = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed-Bold.ttf"; 改为 代码如下: $this->fontCondensed = dirname(__FILE__) . "/../fonts/你找来的中文字体";
$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/你找来的中文字体"; 我修改的: 代码如下: public function Text() { $baseDir = dirname(__FILE__) . "/../../../"; // Free low-res fonts based on Bitstream Vera $this->fontCondensed = $baseDir . "fonts/FANGZHENGFANGSONG.ttf"; $this->fontCondensedBold = $baseDir . "fonts/FANGZHENGFANGSONG.ttf"; } FANGZHENGFANGSONG.ttf 这个文件是我找的方正仿宋简体字库,我把中文名字改成那个样子了,其实不改也是可以的。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |