Detailed explanation of PHP data statistics chart example code_PHP tutorial

2. /***
3. * Time 2010-8-9
4. * www .ite5e.com
5. * Note: If you have any questions, please reply.
6. * There is a calling test code at the bottom of the program.
7. ***/
8. define("DEFAULT_FONT_PATH", "c:/windows/fonts/simhei.ttf");
9. class barbarism
10. {
11.     private $_x;
12.     private $_y;
13.     private $_h;
14.     public $_l = 50;
15.     private $_w = null;
16.     private $_srcPoints = array();
17.     private $_points = array();
18.     
19.     public function __construct($x, $y, $h, $l = 50, $w = null)
20.     {
21.         $this->_x = $x;
22.         $this->_y = $y;
23.         $this->_h = $h;
24.         $this->_l = $l;
25.         $this->_w = $w;
26.         $this->_srcPoints = $this->getSrcPoints();
27.         $this->_points = $this->getPoints();
28.     }
29.     
30.     public function getSrcPoints()
31.     {
32.         return array(
33.             array($this->_x                 , $this->_y),
34.             array($this->_x $this->_l       , $this->_y),
35.             array($this->_x (1.35*$this->_l), $this->_y-(0.35*$this->_l)),
36.             array($this->_x (0.35*$this->_l), $this->_y-(0.35*$this->_l)),
37.             array($this->_x                 , $this->_y $this->_h),
38.             array($this->_x $this->_l       , $this->_y $this->_h),
39.             array($this->_x (1.35*$this->_l), $this->_y $this->_h-(0.35*$this->_l))
40.         );
41.     }
42.     
43.     public function getPoints()
44.     {
45.         $points = array();
46.         foreach($this->_srcPoints as $key => $val)
47.         {
48.             $points[] = $val[0];
49.             $points[] = $val[1];
50.         }
51.         return $points;
52.     }
53.     
54.     public function getTopPoints()
55.     {
56.         return array_slice($this->_points, 0, 8); //顶坐标
57.     }
58.     
59.     public function getBelowPoints()
60.     {
61.         return array_merge(array_slice($this->_points, 0, 2), array_slice($this->_points, 8, 4), array_slice($this->_points, 2, 2)); //下坐标
62.     }
63.     
64.     public function getRightSidePoints()
65.     {
66.         return array_merge(array_slice($this->_points, 2, 2), array_slice($this->_points, 10, 4), array_slice($this->_points, 4, 2)); //右侧坐标
67.     }
68.     
69.     public function draw($image, $topColor, $belowColor, $sideColor, $borderColor = null, $type = LEFT)
70.     {
71.         if (is_null($borderColor))
72.         {
73.             $borderColor = 0xcccccc;
74.         }
75.         
76.         $top_rgb = $this->getRGB($topColor);
77.         $below_rgb = $this->getRGB($belowColor);
78.         $side_rgb = $this->getRGB($sideColor);
79.         $top_color = imagecolorallocate($image, $top_rgb[R], $top_rgb[G], $top_rgb[B]);
80.         $below_color = imagecolorallocate($image, $below_rgb[R], $below_rgb[G], $below_rgb[B]);
81.         $side_color = imagecolorallocate($image, $side_rgb[R], $side_rgb[G], $side_rgb[B]);
82.         
83.         imagefilledpolygon($image, $this->getTopPoints(), 4, $top_color); //画顶面
84.         imagepolygon($image, $this->getTopPoints(), 4, $borderColor); //画顶面边线
85.         
86.         imagefilledpolygon($image, $this->getBelowPoints(), 4, $below_color); //画下面
87.         imagepolygon($image, $this->getBelowPoints(), 4, $borderColor); //画下面边线
88.         
89.         if ($type == LEFT)
90.         {
91.             imagefilledpolygon($image, $this->getRightSidePoints(), 4, $side_color); //画右侧面
92.             imagepolygon($image, $this->getRightSidePoints(), 4, $borderColor); //画侧面边线
93.         }    
94.     }
95.     
96.     public function getRGB($color)
97.     {
98.         $ar = array();
99.         $color = hexdec($color);
100.         $ar[R] = ($color>>16) & 0xff;
101.         $ar[G] = ($color>>8) & 0xff;
102.         $ar[B] = ($color) & 0xff;
103.         return $ar;
104.     }
105. }
107. class Bardate
108. {
109.     private $_W;
110.     private $_H;
111.     private $_bgColor = "ffffff";
112.     private $_barHeights = array();
113.     private $_barTexts = array();
114.     private $_barColors = array();
115.     public $_title;
116.     public $_paddingTop = 30;
117.     public $_paddingBottom = 100;
118.     public $_paddingLeft = 45;
119.     public $_paddingRight = 2;
120.     public $_barL = 50;
121.     public $image;
     http://www.bkjia.com/PHPjc/486183.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/486183.htmlTechArticle?php /*** * Time 2010-8-9 * www.ite5e.com * Note: If you have any questions, please reply. * There is a calling test code at the bottom of the program. ***/ define("DEFAULT_FONT_PATH", "c:/windows/fonts/...