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1 <?php
2 /*=======================================================================
3 // File:        JPGRAPH_STOCK.PHP
4 // Description: Stock plot extension for JpGraph
5 // Created:     2003-01-27
6 // Author:      Johan Persson (johanp@aditus.nu)
7 // Ver:         $Id: jpgraph_stock.php,v 1.5 2003/02/10 16:38:04 aditus Exp $
8 //
9 // License:     This code is released under QPL
10 // Copyright (C) 2003 Johan Persson
11 //========================================================================
12 */
13
14 //===================================================
15 // CLASS StockPlot
16 //===================================================
17 class StockPlot extends Plot {
18     var $iWidth=9;
19     var $iEndLines=1;
20     var $iStockColor1='white',$iStockColor2='darkred',$iStockColor3='darkred';
21     var $iTupleSize = 4;
22 //---------------
23 // CONSTRUCTOR
24     function StockPlot(&$datay,$datax=false) {
25         if( count($datay) % $this->iTupleSize ) {
26             JpGraphError::Raise('Data values for Stock charts must contain an even multiple of '.$this->iTupleSize.' data points.');
27         }
28         $this->Plot($datay,$datax);
29         $this->numpoints /= $this->iTupleSize;
30     }
31 //---------------
32 // PUBLIC METHODS
33         
34     function SetColor($aColor,$aColor1='white',$aColor2='darkred',$aColor3='darkred') {
35         $this->color = $aColor;
36         $this->iStockColor1 = $aColor1;
37         $this->iStockColor2 = $aColor2;
38         $this->iStockColor3 = $aColor3;
39     }
40
41     function SetWidth($aWidth) {
42         // Make sure it's odd
43         $this->iWidth = 2*floor($aWidth/2)+1;
44     }
45
46     function HideEndLines($aHide=true) {
47         $this->iEndLines = !$aHide;
48     }
49
50     // Gets called before any axis are stroked
51     function PreStrokeAdjust(&$graph) {
52         if( $this->center ) {
53             $a=0.5; $b=0.5;
54             $this->numpoints++;
55         } else {
56             $a=0; $b=0;
57         }
58         $graph->xaxis->scale->ticks->SetXLabelOffset($a);
59         $graph->SetTextScaleOff($b);                                            
60     }
61         
62     // Method description
63     function Stroke($img,$xscale,$yscale) {
64         $n=$this->numpoints;
65         if( $this->center ) $n--;
66         if( isset($this->coords[1]) ) {
67             if( count($this->coords[1])!=$n )
68                 JpGraphError::Raise("Number of X and Y points are not equal. Number of X-points:".count($this->coords[1])." Number of Y-points:$numpoints");
69             else
70                 $exist_x = true;
71         }
72         else 
73             $exist_x = false;
74
75         if( $exist_x )
76             $xs=$this->coords[1][0];
77         else
78             $xs=0;
79                 
80         $ts = $this->iTupleSize;
81         $this->csimareas = '';
82         for( $i=0; $i<$n; ++$i) {
83
84             //If value is NULL, then don't draw a bar at all
85             if ($this->coords[0][$i] === null) continue;
86
87             if( $exist_x ) $x=$this->coords[1][$i];
88             else $x=$i;
89             $xt = $xscale->Translate($x);
90             
91             $neg = $this->coords[0][$i*4] > $this->coords[0][$i*$ts+1] ;
92             $yopen  = $yscale->Translate($this->coords[0][$i*$ts]);
93             $yclose = $yscale->Translate($this->coords[0][$i*$ts+1]);
94             $ymin   = $yscale->Translate($this->coords[0][$i*$ts+2]);
95             $ymax   = $yscale->Translate($this->coords[0][$i*$ts+3]);
96
97             $dx = floor($this->iWidth/2);
98             $xl = $xt - $dx;
99             $xr = $xt + $dx;
100
101             if( $neg ) 
102                 $img->SetColor($this->iStockColor3);
103             else
104                 $img->SetColor($this->iStockColor1);
105             $img->FilledRectangle($xl,$yopen,$xr,$yclose);
106             $img->SetLineWeight($this->weight);
107             if( $neg ) 
108                 $img->SetColor($this->iStockColor2);
109             else
110                 $img->SetColor($this->color);
111         
112             $img->Rectangle($xl,$yopen,$xr,$yclose);
113
114             if( $yopen < $yclose ) {
115                 $ytop = $yopen ;
116                 $ybottom = $yclose ;
117             }
118             else {
119                 $ytop = $yclose ;
120                 $ybottom = $yopen ;
121             }
122             $img->SetColor($this->color);
123             $img->Line($xt,$ytop,$xt,$ymax);
124             $img->Line($xt,$ybottom,$xt,$ymin);
125
126             if( $this->iEndLines ) {
127                 $img->Line($xl,$ymax,$xr,$ymax);
128                 $img->Line($xl,$ymin,$xr,$ymin);
129             }
130
131             // A chance for subclasses to add things to the bar
132             // for data point i
133             $this->ModBox($img,$xscale,$yscale,$i,$xl,$xr,$neg);
134
135             // Setup image maps
136             if( !empty($this->csimtargets[$i]) ) {
137                 $this->csimareas.= '<area shape="rect" coords="'.
138                     round($xl).','.round($ytop).','.
139                     round($xr).','.round($ybottom).'" ';   
140                 $this->csimareas .= ' href="'.$this->csimtargets[$i].'"';
141                 if( !empty($this->csimalts[$i]) ) {
142                     $sval=$this->csimalts[$i];
143                     $this->csimareas .= " alt=\"$sval\" title=\"$sval\" ";
144                 }
145                 $this->csimareas.= ">\n";
146             }
147         }                       
148         return true;
149     }
150
151     // A hook for subclasses to modify the plot
152     function ModBox($img,$xscale,$yscale,$i,$xl,$xr,$neg) {}
153
154 } // Class
155
156 //===================================================
157 // CLASS BoxPlot
158 //===================================================
159 class BoxPlot extends StockPlot {
160     var $iPColor='black',$iNColor='white';
161     function BoxPlot($datay,$datax=false) {
162         $this->iTupleSize=5;
163         parent::StockPlot($datay,$datax);
164     }
165
166     function SetMedianColor($aPos,$aNeg) {
167         $this->iPColor = $aPos;
168         $this->iNColor = $aNeg;
169     }
170
171     function ModBox($img,$xscale,$yscale,$i,$xl,$xr,$neg) {
172         if( $neg ) 
173             $img->SetColor($this->iNColor);
174         else
175             $img->SetColor($this->iPColor);
176         
177         $y = $yscale->Translate($this->coords[0][$i*5+4]);
178         $img->Line($xl,$y,$xr,$y);
179     }
180 }
181
182 /* EOF */
183 ?>