<?php

//最后一次修改:2004-6-21

//一个生成矩形图，曲线图的图形分析类

//作者：tonera

//说明：

//任何人可在任何场合*使用这个类。但由此所发生的损害跟作者无关。

//可根据数据自适应X和Y轴大小。

//在同一个图形中可显示多个曲线图

//用户可给出生成的图的尺寸大小，数据参数。类根据数据的值来判断生成的图形的高（默认10格）和宽各分几格。

//若用户没有给出图的尺寸大小，则图形高和宽为255像素

//数据参数通过一个方法add_data($array)来多次添加，每次一个数组。

//可自设定图形边框，矩形图内线，深色边框线，浅色边框线，曲线，点的颜色。若用户没有指定，则为默认值

//set_colors方法设定不同曲线的不同色彩

//可进行图形的叠加显示:点，线，矩形

//注意：需要GD库支持

/*

 //使用示例

 $gg=new build_graph();

 $d1=array(0,62,25,20,20,100,99);

 $d2=array(0,80,75,65,100,56,79);

 $d3=array(0,60,50,25,12,56,45);

 $gg->add_data($d1);

 $gg->add_data($d2);

 $gg->add_data($d3);

 $gg->set_colors("ee00ff,dd8800,00ff00");

 //生成曲线图

 $gg->build("line",0);          //参数0表示显示所有曲线，1为显示第一条，依次类推

 //生成矩形图

 //$gg->build("rectangle","2");    //参数0表示显示第一个矩形，1也为显示第一条，其余依次类推

 */

class build_graph {

        var $graphwidth = 300;

        var $graphheight = 300;

        var $width_num = 0;                //宽分多少等分

        var $height_num = 10;                //高分多少等分，默认为10

        var $height_var = 0;                //高度增量（用户数据平均数）

        var $width_var=0;                //宽度增量（用户数据平均数）

        var $height_max=0;                //最大数据值

        var $array_data=array();          //用户待分析的数据的二维数组

        var $array_error=array();          //收集错误信息

        var $colorBg=array(255,255,255);    //图形背景-白色

        var $colorGrey=array(192,192,192);    //灰色画框

        var $colorBlue=array(0,0,255);       //蓝色

        var $colorRed=array(255,0,0);       //红色（点）

        var $colorDarkBlue=array(0,0,255);    //深色

        var $colorLightBlue=array(200,200,255);       //浅色

        var $colorLightBlack = array(138,138,120); //浅黑

        var $colorBlack = array(30,30,30); //黑

        var $rgbArray = array("ee00ff","dd8800","00ff00","104E8B");

        var $array_color;                //曲线着色（存储十六进制数）

        var $image;                      //我们的图像

        var $lineType = ''; //画底线时标的数字值，则x的值,范围为'day', 'hour'两值

        var $beginDay = '';

        //方法：接受用户数据

        function add_data($array_user_data, $dataKey = 0){

                if(!is_array($array_user_data)){

                        $array_user_data = array();

                }

                if(!is_array($array_user_data) or empty($array_user_data)){

                        $this->array_error['add_data']="没有可供分析的数据";

                        return false;

                        exit();

                }

                if($dataKey == 0 || array_key_exists($dataKey, $this->array_data)){

                        $dataKey = count($this->array_data);

                }

                $this->array_data[$dataKey] = $array_user_data;

        }

        //方法：定义画布宽和长

        function set_img($img_width,$img_height){

                $this->graphwidth = $img_width;

                $this->graphheight = $img_height;

        }

        //设定Y轴的增量等分，默认为10份

        function set_height_num($var_y){

                $this->height_num=$var_y;

        }

        //定义各图形各部分色彩

        function get_RGB($color){             //得到十进制色彩

                $R=($color>>16) & 0xff;

                $G=($color>>8) & 0xff;

                $B=($color) & 0xff;

                return (array($R,$G,$B));

        }

        //---------------------------------------------------------------

        #定义背景色

        function set_color_bg($c1,$c2,$c3){

                $this->colorBg=array($c1,$c2,$c3);

        }

        #定义画框色

        function set_color_Grey($c1,$c2,$c3){

                $this->colorGrey=array($c1,$c2,$c3);

        }

        #定义蓝色

        function set_color_Blue($c1,$c2,$c3){

                $this->colorBlue=array($c1,$c2,$c3);

        }

        #定义色Red

        function set_color_Red($c1,$c2,$c3){

                $this->colorRed=array($c1,$c2,$c3);

        }

        #定义深色

        function set_color_DarkBlue($c1,$c2,$c3){

                $this->colorDarkBlue=array($c1,$c2,$c3);

        }

        #定义浅色

        function set_color_LightBlue($c1,$c2,$c3){

                $this->colorLightBlue=array($c1,$c2,$c3);

        }

        //设定画底线时标的数字值，则x的值,范围为'day', 'hour'两值

        function  setLineStrinType($type){

                if(!in_array($type, array('day', 'hour'))){

                        return false;

                }

                $this->lineType = $type;

        }

        //---------------------------------------------------------------

        //方法:由用户数据将画布分成若干等份宽

        //并计算出每份多少像素

        function get_width_num(){

                $dataCount = array();

                foreach ($this->array_data as $key => $oneData){

                        $dataCount[] = count($oneData);

                }

                $this->width_num = max($dataCount);

        }

        function get_max_height(){

                //获得用户数据的最大值

                $tmpvar = array();

                foreach($this->array_data as $tmp_value){

                        $tmpvar[]= max($tmp_value);

                }

                if(isset($tmpvar[0])){

                        $more = $tmpvar[0];

                }

                $this->height_max = max($tmpvar) + $this->height_var;

                return max($tmpvar);

        }

        function get_height_length(){

                //计算出每格的增量长度(用户数据，而不是图形的像素值)

                $max_var = $this->get_max_height();

                $max_var = round($max_var/$this->height_num);

                $first_num = substr($max_var,0,1);

                if(substr($max_var,1,1)){

                        if(substr($max_var,1,1)>=5)

                        $first_num += 1;

                }

                for($i = 1; $i < strlen($max_var); $i++){

                        $first_num .= "0";

                }

                return (int)$first_num;

        }

        function get_var_wh(){          //得到高和宽的增量

                $this->get_width_num();

                //得到高度增量和宽度增量

                $this->height_var = $this->get_height_length();

                $this->width_var = round($this->graphwidth/$this->width_num, 3);

        }

        function set_colors($str_colors){

                //用于多条曲线的不同着色，如$str_colors="ee00ff,dd0000,cccccc"

                $this->array_color = split(",",$str_colors);

        }

        function set_begin_day($beginDay){

                if(!is_numeric($beginDay)){

                        return false;

                }

                $this->beginDay = $beginDay;

        }

        ######################################################################################################

        function build_line($var_num){

                if(!empty($var_num)){                   //如果用户只选择显示一条曲线

                        $array_tmp[0] = $this->array_data[$var_num-1];

                        $this->array_data = $array_tmp;

                }

                for($j=0;$j<count($this->array_data);$j++){

                        list($R,$G,$B)=$this->get_RGB(hexdec($this->array_color[$j]));

                        $colorBlue=imagecolorallocate($this->image,$R,$G,$B);

                        for($i = 0;$i < $this->width_num - 1;$i++){

                                $height_pix = round(($this->array_data[$j][$i]/$this->height_max)*$this->graphheight);

                                $height_next_pix = round($this->array_data[$j][$i + 1]/$this->height_max*$this->graphheight);

                                imageline($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,$this->width_var*($i + 2),$this->graphheight-$height_next_pix,$colorBlue);

                        }

                }

                //画点

                $colorRed = imagecolorallocate($this->image, $this->colorBlue[0], $this->colorBlue[1], $this->colorBlue[2]);

                for($j = 0; $j < count($this->array_data); $j++){

                        list($R,$G,$B) = $this->get_RGB(hexdec($this->array_color[$j]));

                        $colorPoint = imagecolorallocate($this->image,$R,$G,$B);

                        for($i = 0; $i < $this->width_num; $i++){

                                if(isset($this->array_data[$j][$i])){

                                        $height_pix = round(($this->array_data[$j][$i]/$this->height_max)*$this->graphheight);

                                        $arcRet = imagearc($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,6,5,0,360,$colorPoint);

                                        $borderRet = imagefilltoborder($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,$colorPoint,$colorPoint);

                                        if(!$arcRet || !$borderRet){

                                                break;

                                        }

                                }

                        }

                }

                for($j = 0; $j < count($this->array_data); $j++){

                        list($R,$G,$B) = $this->get_RGB(hexdec($this->array_color[$j]));

                        $colorPoint = imagecolorallocate($this->image,$R,$G,$B);

                        for($i = 0; $i < $this->width_num; $i++){

                                $height_pix = round(($this->array_data[$j][$i]/$this->height_max) * $this->graphheight);

                                $arcRet = imagearc($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,6,5,0,360,$colorPoint);

                                $arcRet = imagefilltoborder($this->image,$this->width_var*($i + 1),$this->graphheight-$height_pix,$colorPoint,$colorPoint);

                                if(!$arcRet || !$borderRet){

                                        break;

                                }

                        }

                }

        }

        ######################################################################################################

        function build_rectangle($select_gra){

                if(!empty($select_gra)){                   //用户选择显示一个矩形

                        $select_gra-=1;

                }

                //画矩形

                //配色

                $colorDarkBlue=imagecolorallocate($this->image, $this->colorDarkBlue[0], $this->colorDarkBlue[1], $this->colorDarkBlue[2]);

                $colorLightBlue=imagecolorallocate($this->image, $this->colorLightBlue[0], $this->colorLightBlue[1], $this->colorLightBlue[2]);

                if(empty($select_gra))

                $select_gra=0;

                for($i=0; $i<$this->width_num; $i++){

                        $height_pix=round(($this->array_data[$select_gra][$i]/$this->height_max)*$this->graphheight);

                        imagefilledrectangle($this->image,$this->width_var*$i,$this->graphheight-$height_pix,$this->width_var*($i+1),$this->graphheight, $colorDarkBlue);

                        imagefilledrectangle($this->image,($i*$this->width_var)+1,($this->graphheight-$height_pix)+1,$this->width_var*($i+1)-5,$this->graphheight-2, $colorLightBlue);

                }

        }

        ######################################################################################################

        function create_cloths(){

                //创建画布

                $this->image = imagecreate($this->graphwidth+20,$this->graphheight+20);

        }

        function create_frame(){

                //创建画框

                $this->get_var_wh();

                //配色

                $colorBg=imagecolorallocate($this->image, $this->colorBg[0], $this->colorBg[1], $this->colorBg[2]);

                $colorGrey=imagecolorallocate($this->image, $this->colorGrey[0], $this->colorGrey[1], $this->colorGrey[2]);

                //创建图像周围的框

                imageline($this->image, 0, 0, 0, $this->graphheight,$colorGrey);

                imageline($this->image, 0, 0, $this->graphwidth, 0,$colorGrey);

                //imageline($this->image, ($this->graphwidth-1),0,($this->graphwidth-1),($this->graphheight-1),$colorGrey);

                imageline($this->image, 0,($this->graphheight-1),($this->graphwidth-1),($this->graphheight-1),$colorGrey);

        }

        function create_line(){

                //创建网格。

                $this->get_var_wh();

                $colorBg = imagecolorallocate($this->image, $this->colorBg[0], $this->colorBg[1], $this->colorBg[2]);

                $colorGrey = imagecolorallocate($this->image, $this->colorGrey[0], $this->colorGrey[1], $this->colorGrey[2]);

                $colorRed = imagecolorallocate($this->image, $this->colorRed[0], $this->colorRed[1], $this->colorRed[2]);

                $colorLightBlack = imagecolorallocate($this->image, $this->colorLightBlack[0], $this->colorLightBlack[1], $this->colorLightBlack[2]);

                $colorBlack = imagecolorallocate($this->image, $this->colorBlack[0], $this->colorBlack[1], $this->colorBlack[2]);

                for($i = 1 ;$i <= $this->height_num + 5; $i++){

                        //画横线

                        imageline($this->image,0,$this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i,$this->graphwidth,$this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i,$colorGrey);

                        //标出数字

                        imagestring($this->image,2,0,$this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i,$this->height_var*$i,$colorLightBlack);

                }

                $type = $this->lineType;

                if($type == "day"){

                        if($this->beginDay){

                                $j = $this->beginDay;

                        }else{

                                $j = 1;

                        }

                }elseif($type == "hour"){

                        $j = 0;

                }

                for($i = 1;$i <= $this->width_num; $i++){

                        //画竖线

                        imageline($this->image,$this->width_var*$i,0,$this->width_var*$i,$this->graphwidth,$colorGrey);

                        //标出数字

                        if($type == 'day'){

                                if($i == 1){

                                        imagestring($this->image,2,$this->width_var*$i,$this->graphheight-15,$j,$colorBlack);

                                }

                                imagestring($this->image,2,$this->width_var*($i + 1),$this->graphheight-15,$j + 1,$colorBlack);

                        }elseif($type == 'hour'){

                                if($i == 1){

                                        imagestring($this->image,2,$this->width_var*$i,$this->graphheight-15,$j,$colorBlack);

                                }

                                imagestring($this->image,2,$this->width_var*($i + 1),$this->graphheight-15,$j + 1,$colorBlack);

                        }else{

                                imagestring($this->image,2,$this->width_var*($i + 1),$this->graphheight-15,$i,$colorBlack);

                        }

                        $j++;

                        if($type == "day" && $j == 31){

                                 $j = 1;

                        }elseif($type == "hour" && $j == 23){

                                $j = -1;

                        }

                }

        }

        function build($graph,$str_var, $outpwd = ""){

                //$graph是用户指定的图形种类,$str_var是生成哪个数据的图

                if(empty($outpwd)){

                        header("Content-type: image/jpeg");

                }

                $this->create_cloths();          //先要有画布啊~~

                switch ($graph){

                        case "line":

                                $this->create_frame();          //画个框先：）

                                $this->create_line();          //打上底格线

                                $this->build_line($str_var);          //画曲线

                                break;

                        case "rectangle":

                                $this->create_frame();                   //画个框先：）

                                $this->build_rectangle($str_var);          //画矩形

                                $this->create_line();                   //打上底格线

                                break;

                }

                //输出图形并清除内存

                if(!empty($outpwd)){

                        imagepng($this->image, $outpwd);

                }else{

                        imagepng($this->image);

                }

                imagedestroy($this->image);

        }

        ######################################################################################################

}