常用php函数[08]：生成曲线图的類

1. <?php
2.     class LabelFormat{
3.         var $width;
4.         var $precision;
5.         var $specific;
6.         var $vertical;
7.         var $fontsize;
8.         var $fun;
9.  
10.         function LabelFormat ($width=0, $prec=1, $spec="f", $fontsize=3, $vert=0, $function="") {
11.             $this->fun=$function;
12.             $this->width=$width;
13.             $this->precision=$prec;
14.             $this->specific=$spec;
15.             $this->fontsize=$fontsize;
16.             $this->vertical=$vert;
17.         }
18.  
19.         function Out ($value){
20.              //$this->fun=$fun;
21.             $format_string="%";
22.             if ($this->width)
23.             $format_string.=$this->width;
24.             if ($this->precision)
25.                 $format_string.=".".$this->precision;
26.             $format_string.=$this->specific;
27.             if (!empty($this->fun)){
28.                 $out=call_user_func ($this->fun, $value);
29.                 $wstring=sprintf($format_string, $out);
30.             }
31.             else
32.                 $wstring=sprintf($format_string, $value);
33.             return $wstring;
34.         }
35.     }
36.  
37.     class graph2d{
38.         var $image_type;
39.         var $dimx;
40.         var $dimy;
41.  
42.         var $xmin;
43.         var $xmax;
44.  
45.         var $ymin;
46.         var $ymax;
47.  
48.         var $xstep;
49.         var $ystep;
50.  
51.         var $xskip;
52.         var $yskip;
53.  
54.         var $xformat;
55.         var $yformat;
56.  
57.         var $b_red;
58.         var $b_green;
59.         var $b_blue;
60.         var $b_alpha;
61.         var $a_red;
62.         var $a_green;
63.         var $a_blue;
64.         var $a_alpha;
65.  
66.         var $is_grid;
67.         var $grid_red;
68.         var $grid_green;
69.         var $grid_blue;
70.         //var $grid_style;
71.  
72.         var $top;
73.         var $left;
74.         var $right;
75.         var $bottom;
76.  
77.         var $xlegend;
78.         var $ylegend;
79.         var $title;
80.  
81.         var $image;
82.  
83.         function graph2d ($image_type, $width, $height, $xleft=0, $ytop=0, $xright=0, $ybottom=0, $br=0xFF, $bg=0xFF, $bb=0xFF, $b_alpha=0, $ar=0, $ag=0, $ab=0, $a_alpha=0)
84.         {
85.             $this->image_type=$image_type;
86.             $this->dimx=(int)$width;
87.             $this->dimy=(int)$height;
88.            
89.             $this->b_red=(int)$br;
90.             $this->b_green=(int)$bg;
91.             $this->b_blue=(int)$bb;
92.  
93.             $this->a_red=(int)$ar;
94.             $this->a_green=(int)$ag;
95.             $this->a_blue=(int)$ab;
96.  
97.  
98.             $this->a_alpha=(int)$a_alpha;
99.             $this->b_alpha=(int)$b_alpha;
100.  
101.             $this->left=(int)$xleft;
102.             $this->top=(int)$ytop;
103.             $this->right=(int)$xright;
104.             $this->bottom=(int)$ybottom;
105.  
106.             $this->xskip=1;
107.             $this->yskip=1;
108.  
109.             $this->xformat=new LabelFormat();
110.             $this->yformat=new LabelFormat();
111.  
112.             $this->xlegend="";
113.             $this->ylegend="";
114.             $this->title="";
115.  
116.             $this->is_grid=FALSE;
117.             //$this->grid_style=array();
118.  
119.             $imtype="Content-type: image/".$this->image_type;
120.             header ($imtype);
121.             $this->image=@imagecreate ($this->dimx, $this->dimy);// or die "Cannot initialize new GD Image stream";
122.         }
123.  
124.         function SetAxisScales ($xmin, $xmax, $xstep, $xskip, $ymin, $ymax, $ystep, $yskip)
125.         {
126.             $this->xmin=(double)$xmin;
127.             $this->xmax=(double)$xmax;
128.             $this->xstep=(double)$xstep;
129.             $this->xskip=(int)$xskip;
130.  
131.             $this->ymin=(double)$ymin;
132.             $this->ymax=(double)$ymax;
133.             $this->ystep=(double)$ystep;
134.             $this->yskip=(int)$yskip;
135.         }
136.  
137.         function SetXLegend ($xleg) { $this->xlegend=$xleg; }
138.  
139.         function SetYLegend ($yleg) { $this->ylegend=$yleg; }
140.  
141.         function SetTitle ($title) { $this->title=$title; }
142.  
143.         function SetLineThickness ($thikness)
144.         {
145.             if ( is_resource ($this->image) && is_int ($thikness))
146.                 imagesetthickness ($this->image, $thikness);
147.         }
148.  
149.         function SetGrid($grid, $red, $green, $blue)
150.         {
151.             $this->is_grid=$grid;
152.             $this->grid_red=$red;
153.             $this->grid_green=$green;
154.             $this->grid_blue=$blue;
155.             //$this->grid_style=$style;
156.         }
157.  
158.         function GraphCoord ()
159.         {
160.             if (function_exists("imagecolorallocatealpha"))
161.             {
162.                 $background=imagecolorallocatealpha ($this->image, $this->b_red, $this->b_green, $this->b_blue, $this->b_alpha);
163.                 $foreground=imagecolorallocatealpha ($this->image, $this->a_red, $this->a_green, $this->a_blue, $this->a_alpha);
164.             }
165.             else
166.             {
167.                 $background=imagecolorallocate ($this->image, $this->b_red, $this->b_green, $this->b_blue);
168.                 if ($this->b_alpha)
169.                     imagecolortransparent($this->image, $background);
170.                 $foreground=imagecolorallocate ($this->image, $this->a_red, $this->a_green, $this->a_blue);
171.             }
172.  
173.             $X=$this->dimx-($this->left+$this->right);
174.             $Y=$this->dimy-($this->top+$this->bottom);
175.  
176.             $scaleX=($this->xmax-$this->xmin)/$X;
177.             $scaleY=($this->ymax-$this->ymin)/$Y;
178.  
179.             $gcolor=imagecolorallocate ($this->image, $this->grid_red, $this->grid_green, $this->grid_blue);
180.             if ($this->is_grid)
181.                 $coord=imagerectangle($this->image, $this->left, $this->top, $this->dimx-$this->right, $this->dimy-$this->bottom, $gcolor);
182.             else
183.                 $coord=imagerectangle($this->image, $this->left, $this->top, $this->dimx-$this->right, $this->dimy-$this->bottom, $foreground);
184.             if (!empty($this->title))
185.                 imagestring ($this->image, 4, $this->left+$X/2-strlen($this->title)*imagefontwidth(4)/2, $this->top/2-imagefontheight(4)/2, $this->title, $foreground);
186.             $numx=($this->xmax-$this->xmin)/$this->xstep+1;
187.             $numy=($this->ymax-$this->ymin)/$this->ystep+1;
188.             for ($i=0; $i<$numx; $i++)
189.             {
190.                 $x=($i*$X)/($numx-1)+$this->left;
191.                 if ($i>0 && $i<$numx-1)
192.                     if ($this->is_grid)
193.                         imageline ($this->image, $x, $Y+$this->top, $x, $this->top, $gcolor);
194.                     else
195.                         imageline ($this->image, $x, $Y+$this->top-5, $x, $Y+$this->top+5, $foreground);
196.                 if ($i%$this->xskip==0)
197.                 {
198.                     $xstr=$this->xformat->Out($this->xmin+($i*$X)*$scaleX/($numx-1));
199.                     if ($this->xformat->vertical)
200.                         imagestringup ($this->image, $this->xformat->fontsize, $x-imagefontwidth($this->xformat->fontsize), $Y+$this->top+strlen($xstr)*imagefontheight($this->xformat->fontsize)/2+5, $xstr, $foreground);
201.                     else
202.                         imagestring ($this->image, $this->xformat->fontsize, $x-strlen($xstr)*imagefontwidth($this->xformat->fontsize)/2, $Y+$this->top+imagefontheight($this->xformat->fontsize)/2, $xstr, $foreground);
203.                 }
204.             }
205.             if (!empty($this->xlegend))
206.                 imagestring ($this->image, 3, $this->left+$X/2, $this->top+$Y+3*imagefontheight(3)/2, $this->xlegend, $foreground);
207.             for ($i=0; $i<$numy; $i++)
208.             {
209.                 $y=($i*$Y)/($numy-1);
210.                 if ($i>0 && $i<$numy-1)
211.                     if ($this->is_grid)
212.                         imageline ($this->image, $this->left-5, $y+$this->top, $this->left+$X, $y+$this->top, $gcolor);
213.                     else
214.                         imageline ($this->image, $this->left-5, $y+$this->top, $this->left+5, $y+$this->top, $foreground);
215.                 if ($i%$this->yskip==0)
216.                 {
217.                     $ystr=$this->yformat->Out($this->ymin+($i*$Y)*$scaleY/($numy-1));
218.                     if ($this->yformat->vertical)
219.                         imagestringup ($this->image, $this->yformat->fontsize, $this->left-imagefontheight($this->yformat->fontsize)-5, $Y+$this->top+$this->bottom-$y-3*strlen($ystr)*imagefontwidth($this->yformat->fontsize)/2, $ystr, $foreground);
220.                     else
221.                         imagestring ($this->image, $this->yformat->fontsize, $this->left-strlen($ystr)*imagefontwidth($this->yformat->fontsize)-5, $Y+$this->top-$y-imagefontheight($this->yformat->fontsize)/2, $ystr, $foreground);
222.                 }
223.             }
224.             if (!empty($this->ylegend))
225.                 imagestringup ($this->image, 3, $this->left/2-3*imagefontheight(3)/2, $this->top+$Y/2+strlen($this->ylegend)*imagefontwidth(3)/2, $this->ylegend, $foreground);
226.         }
227.  
228.         function Draw ($xarray, $yarray, $r=0, $g=0, $b=0)
229.         {
230.             if (!is_array($xarray) || !is_array($yarray)) return;
231.  
232.             if (function_exists("imagecolorallocatealpha"))
233.             {
234.                 $background=imagecolorallocatealpha ($this->image, $this->b_red, $this->b_green, $this->b_blue, $this->b_alpha);
235.                 $foreground=imagecolorallocatealpha ($this->image, $this->a_red, $this->a_green, $this->a_blue, $this->a_alpha);
236.             }
237.             else
238.             {
239.                 $background=imagecolorallocate ($this->image, $this->b_red, $this->b_green, $this->b_blue);
240.                 if ($this->b_alpha)
241.                     imagecolortransparent($this->image, $background);
242.                 $foreground=imagecolorallocate ($this->image, $this->a_red, $this->a_green, $this->a_blue);
243.             }
244.             $graphcolor=imagecolorallocate ($this->image, $r, $g, $b);
245.  
246.             $X=$this->dimx-($this->left+$this->right);
247.             $Y=$this->dimy-($this->top+$this->bottom);
248.  
249.             $scaleX=($this->xmax-$this->xmin)/$X;
250.             $scaleY=($this->ymax-$this->ymin)/$Y;
251.  
252.             $numx=($this->xmax-$this->xmin)/$this->xstep+1;
253.             $numy=($this->ymax-$this->ymin)/$this->ystep+1;
254.  
255.             $nx=count($xarray);
256.             $ny=count($yarray);
257.             $n=min($nx, $ny);
258.  
259.             for ($i=1; $i<$n; $i++)
260.                 imageline($this->image, $this->left+($xarray[$i-1]-$this->xmin)/$scaleX, $this->top+($this->ymax-$yarray[$i-1])/$scaleY, $this->left+($xarray[$i]-$this->xmin)/$scaleX, $this->top+($this->ymax-$yarray[$i])/$scaleY, $graphcolor);
261.         }
262.  
263.         function ImageOut ($filename)
264.         {
265.             if (strcasecmp ($this->image_type, "jpeg")==0)
266.                 imagejpeg ($this->image, $filename, 100);
267.             elseif (strcasecmp ($this->image_type, "png")==0)
268.                 imagepng ($this->image, $filename, 100);
269.             elseif (strcasecmp ($this->image_type, "gif")==0)
270.                 imagegif ($this->image, $filename, 100);
271.             elseif (strcasecmp ($this->image_type, "wbmp")==0)
272.                 imagewbmp ($this->image, $filename, 100);
273.         }
274.  
275.         function Close ()
276.         {
277.             imagedestroy ($this->image);
278.         }
279.     }
280. ?>