source: trunk/client/modules/Elezioni/grafici-old/jpgraph_canvtools.php@ 11

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1<?php
2/*=======================================================================
3// File: JPGRAPH_CANVTOOLS.PHP
4// Description: Some utilities for text and shape drawing on a canvas
5// Created: 2002-08-23
6// Author: Johan Persson (johanp@aditus.nu)
7// Ver: $Id: jpgraph_canvtools.php,v 1.9 2002/12/01 10:00:40 aditus Exp $
8//
9// License: This code is released under QPL
10// Copyright (C) 2001,2002 Johan Persson
11//========================================================================
12*/
13
14DEFINE('CORNER_TOPLEFT',0);
15DEFINE('CORNER_TOPRIGHT',1);
16DEFINE('CORNER_BOTTOMRIGHT',2);
17DEFINE('CORNER_BOTTOMLEFT',3);
18
19
20//===================================================
21// CLASS CanvasScale
22// Description: Define a scale for canvas so we
23// can abstract away with absolute pixels
24//===================================================
25
26class CanvasScale {
27 var $g;
28 var $w,$h;
29 var $ixmin=0,$ixmax=10,$iymin=0,$iymax=10;
30
31 function CanvasScale(&$graph,$xmin=0,$xmax=10,$ymin=0,$ymax=10) {
32 $this->g = &$graph;
33 $this->w = $graph->img->width;
34 $this->h = $graph->img->height;
35 $this->ixmin = $xmin;
36 $this->ixmax = $xmax;
37 $this->iymin = $ymin;
38 $this->iymax = $ymax;
39 }
40
41 function Set($xmin=0,$xmax=10,$ymin=0,$ymax=10) {
42 $this->ixmin = $xmin;
43 $this->ixmax = $xmax;
44 $this->iymin = $ymin;
45 $this->iymax = $ymax;
46 }
47
48 function Translate($x,$y) {
49 $xp = round(($x-$this->ixmin)/($this->ixmax - $this->ixmin) * $this->w);
50 $yp = round(($y-$this->iymin)/($this->iymax - $this->iymin) * $this->h);
51 return array($xp,$yp);
52 }
53
54 function TranslateX($x) {
55 $xp = round(($x-$this->ixmin)/($this->ixmax - $this->ixmin) * $this->w);
56 return $xp;
57 }
58
59 function TranslateY($y) {
60 $yp = round(($y-$this->iymin)/($this->iymax - $this->iymin) * $this->h);
61 return $yp;
62 }
63
64}
65
66
67//===================================================
68// CLASS Shape
69// Description: Methods to draw shapes on canvas
70//===================================================
71class Shape {
72 var $img,$scale;
73
74 function Shape(&$aGraph,&$scale) {
75 $this->img = &$aGraph->img;
76 $this->img->SetColor('black');
77 $this->scale = &$scale;
78 }
79
80 function SetColor($aColor) {
81 $this->img->SetColor($aColor);
82 }
83
84 function Line($x1,$y1,$x2,$y2) {
85 list($x1,$y1) = $this->scale->Translate($x1,$y1);
86 list($x2,$y2) = $this->scale->Translate($x2,$y2);
87 $this->img->Line($x1,$y1,$x2,$y2);
88 }
89
90 function Polygon($p,$aClosed=false) {
91 $n=count($p);
92 for($i=0; $i < $n; $i+=2 ) {
93 $p[$i] = $this->scale->TranslateX($p[$i]);
94 $p[$i+1] = $this->scale->TranslateY($p[$i+1]);
95 }
96 $this->img->Polygon($p,$aClosed);
97 }
98
99 function FilledPolygon($p) {
100 $n=count($p);
101 for($i=0; $i < $n; $i+=2 ) {
102 $p[$i] = $this->scale->TranslateX($p[$i]);
103 $p[$i+1] = $this->scale->TranslateY($p[$i+1]);
104 }
105 $this->img->FilledPolygon($p);
106 }
107
108
109 // Draw a bezier curve with defining points in the $aPnts array
110 // using $aSteps steps.
111 // 0=x0, 1=y0
112 // 2=x1, 3=y1
113 // 4=x2, 5=y2
114 // 6=x3, 7=y3
115 function Bezier($p,$aSteps=40) {
116 $x0 = $p[0];
117 $y0 = $p[1];
118 // Calculate coefficients
119 $cx = 3*($p[2]-$p[0]);
120 $bx = 3*($p[4]-$p[2])-$cx;
121 $ax = $p[6]-$p[0]-$cx-$bx;
122 $cy = 3*($p[3]-$p[1]);
123 $by = 3*($p[5]-$p[3])-$cy;
124 $ay = $p[7]-$p[1]-$cy-$by;
125
126 // Step size
127 $delta = 1.0/$aSteps;
128
129 $x_old = $x0;
130 $y_old = $y0;
131 for($t=$delta; $t<=1.0; $t+=$delta) {
132 $tt = $t*$t; $ttt=$tt*$t;
133 $x = $ax*$ttt + $bx*$tt + $cx*$t + $x0;
134 $y = $ay*$ttt + $by*$tt + $cy*$t + $y0;
135 $this->Line($x_old,$y_old,$x,$y);
136 $x_old = $x;
137 $y_old = $y;
138 }
139 $this->Line($x_old,$y_old,$p[6],$p[7]);
140 }
141
142 function Rectangle($x1,$y1,$x2,$y2) {
143 list($x1,$y1) = $this->scale->Translate($x1,$y1);
144 list($x2,$y2) = $this->scale->Translate($x2,$y2);
145 $this->img->Rectangle($x1,$y1,$x2,$y2);
146 }
147
148 function FilledRectangle($x1,$y1,$x2,$y2) {
149 list($x1,$y1) = $this->scale->Translate($x1,$y1);
150 list($x2,$y2) = $this->scale->Translate($x2,$y2);
151 $this->img->FilledRectangle($x1,$y1,$x2,$y2);
152 }
153
154 function Circle($x1,$y1,$r) {
155 list($x1,$y1) = $this->scale->Translate($x1,$y1);
156 if( $r >= 0 )
157 $r = $this->scale->TranslateX($r);
158 else
159 $r = -$r;
160 $this->img->Circle($x1,$y1,$r);
161 }
162
163 function FilledCircle($x1,$y1,$r) {
164 list($x1,$y1) = $this->scale->Translate($x1,$y1);
165 if( $r >= 0 )
166 $r = $this->scale->TranslateX($r);
167 else
168 $r = -$r;
169 $this->img->FilledCircle($x1,$y1,$r);
170 }
171
172 function RoundedRectangle($x1,$y1,$x2,$y2,$r=null) {
173 list($x1,$y1) = $this->scale->Translate($x1,$y1);
174 list($x2,$y2) = $this->scale->Translate($x2,$y2);
175
176 if( $r == null )
177 $r = 5;
178 elseif( $r >= 0 )
179 $r = $this->scale->TranslateX($r);
180 else
181 $r = -$r;
182 $this->img->RoundedRectangle($x1,$y1,$x2,$y2,$r);
183 }
184
185 function FilledRoundedRectangle($x1,$y1,$x2,$y2,$r=null) {
186 list($x1,$y1) = $this->scale->Translate($x1,$y1);
187 list($x2,$y2) = $this->scale->Translate($x2,$y2);
188
189 if( $r == null )
190 $r = 5;
191 elseif( $r > 0 )
192 $r = $this->scale->TranslateX($r);
193 else
194 $r = -$r;
195 $this->img->FilledRoundedRectangle($x1,$y1,$x2,$y2,$r);
196 }
197
198 function ShadowRectangle($x1,$y1,$x2,$y2,$fcolor=false,$shadow_width=null,$shadow_color=array(102,102,102)) {
199 list($x1,$y1) = $this->scale->Translate($x1,$y1);
200 list($x2,$y2) = $this->scale->Translate($x2,$y2);
201 if( $shadow_width == null )
202 $shadow_width=4;
203 else
204 $shadow_width=$this->scale->TranslateX($shadow_width);
205 $this->img->ShadowRectangle($x1,$y1,$x2,$y2,$fcolor,$shadow_width,$shadow_color);
206 }
207
208 function SetTextAlign($halign,$valign="bottom") {
209 $this->img->SetTextAlign($halign,$valign="bottom");
210 }
211
212 function StrokeText($x1,$y1,$txt,$dir=0,$paragraph_align="left") {
213 list($x1,$y1) = $this->scale->Translate($x1,$y1);
214 $this->img->StrokeText($x1,$y1,$txt,$dir,$paragraph_align);
215 }
216
217 // A rounded rectangle where one of the corner has been moved "into" the
218 // rectangle 'iw' width and 'ih' height. Corners:
219 // 0=Top left, 1=top right, 2=bottom right, 3=bottom left
220 function IndentedRectangle($xt,$yt,$w,$h,$iw=0,$ih=0,$aCorner=3,$aFillColor="",$r=4) {
221
222 list($xt,$yt) = $this->scale->Translate($xt,$yt);
223 list($w,$h) = $this->scale->Translate($w,$h);
224 list($iw,$ih) = $this->scale->Translate($iw,$ih);
225
226 $xr = $xt + $w - 0;
227 $yl = $yt + $h - 0;
228
229 switch( $aCorner ) {
230 case 0: // Upper left
231
232 // Bottom line, left & right arc
233 $this->img->Line($xt+$r,$yl,$xr-$r,$yl);
234 $this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);
235 $this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);
236
237 // Right line, Top right arc
238 $this->img->Line($xr,$yt+$r,$xr,$yl-$r);
239 $this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);
240
241 // Top line, Top left arc
242 $this->img->Line($xt+$iw+$r,$yt,$xr-$r,$yt);
243 $this->img->Arc($xt+$iw+$r,$yt+$r,$r*2,$r*2,180,270);
244
245 // Left line
246 $this->img->Line($xt,$yt+$ih+$r,$xt,$yl-$r);
247
248 // Indent horizontal, Lower left arc
249 $this->img->Line($xt+$r,$yt+$ih,$xt+$iw-$r,$yt+$ih);
250 $this->img->Arc($xt+$r,$yt+$ih+$r,$r*2,$r*2,180,270);
251
252 // Indent vertical, Indent arc
253 $this->img->Line($xt+$iw,$yt+$r,$xt+$iw,$yt+$ih-$r);
254 $this->img->Arc($xt+$iw-$r,$yt+$ih-$r,$r*2,$r*2,0,90);
255
256 if( $aFillColor != '' ) {
257 $bc = $this->img->current_color_name;
258 $this->img->PushColor($aFillColor);
259 $this->img->FillToBorder($xr-$r,$yl-$r,$bc);
260 $this->img->PopColor();
261 }
262
263 break;
264
265 case 1: // Upper right
266
267 // Bottom line, left & right arc
268 $this->img->Line($xt+$r,$yl,$xr-$r,$yl);
269 $this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);
270 $this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);
271
272 // Left line, Top left arc
273 $this->img->Line($xt,$yt+$r,$xt,$yl-$r);
274 $this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);
275
276 // Top line, Top right arc
277 $this->img->Line($xt+$r,$yt,$xr-$iw-$r,$yt);
278 $this->img->Arc($xr-$iw-$r,$yt+$r,$r*2,$r*2,270,360);
279
280 // Right line
281 $this->img->Line($xr,$yt+$ih+$r,$xr,$yl-$r);
282
283 // Indent horizontal, Lower right arc
284 $this->img->Line($xr-$iw+$r,$yt+$ih,$xr-$r,$yt+$ih);
285 $this->img->Arc($xr-$r,$yt+$ih+$r,$r*2,$r*2,270,360);
286
287 // Indent vertical, Indent arc
288 $this->img->Line($xr-$iw,$yt+$r,$xr-$iw,$yt+$ih-$r);
289 $this->img->Arc($xr-$iw+$r,$yt+$ih-$r,$r*2,$r*2,90,180);
290
291 if( $aFillColor != '' ) {
292 $bc = $this->img->current_color_name;
293 $this->img->PushColor($aFillColor);
294 $this->img->FillToBorder($xt+$r,$yl-$r,$bc);
295 $this->img->PopColor();
296 }
297
298 break;
299
300 case 2: // Lower right
301 // Top line, Top left & Top right arc
302 $this->img->Line($xt+$r,$yt,$xr-$r,$yt);
303 $this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);
304 $this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);
305
306 // Left line, Bottom left arc
307 $this->img->Line($xt,$yt+$r,$xt,$yl-$r);
308 $this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);
309
310 // Bottom line, Bottom right arc
311 $this->img->Line($xt+$r,$yl,$xr-$iw-$r,$yl);
312 $this->img->Arc($xr-$iw-$r,$yl-$r,$r*2,$r*2,0,90);
313
314 // Right line
315 $this->img->Line($xr,$yt+$r,$xr,$yl-$ih-$r);
316
317 // Indent horizontal, Lower right arc
318 $this->img->Line($xr-$r,$yl-$ih,$xr-$iw+$r,$yl-$ih);
319 $this->img->Arc($xr-$r,$yl-$ih-$r,$r*2,$r*2,0,90);
320
321 // Indent vertical, Indent arc
322 $this->img->Line($xr-$iw,$yl-$r,$xr-$iw,$yl-$ih+$r);
323 $this->img->Arc($xr-$iw+$r,$yl-$ih+$r,$r*2,$r*2,180,270);
324
325 if( $aFillColor != '' ) {
326 $bc = $this->img->current_color_name;
327 $this->img->PushColor($aFillColor);
328 $this->img->FillToBorder($xt+$r,$yt+$r,$bc);
329 $this->img->PopColor();
330 }
331
332 break;
333
334 case 3: // Lower left
335 // Top line, Top left & Top right arc
336 $this->img->Line($xt+$r,$yt,$xr-$r,$yt);
337 $this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);
338 $this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);
339
340 // Right line, Bottom right arc
341 $this->img->Line($xr,$yt+$r,$xr,$yl-$r);
342 $this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);
343
344 // Bottom line, Bottom left arc
345 $this->img->Line($xt+$iw+$r,$yl,$xr-$r,$yl);
346 $this->img->Arc($xt+$iw+$r,$yl-$r,$r*2,$r*2,90,180);
347
348 // Left line
349 $this->img->Line($xt,$yt+$r,$xt,$yl-$ih-$r);
350
351 // Indent horizontal, Lower left arc
352 $this->img->Line($xt+$r,$yl-$ih,$xt+$iw-$r,$yl-$ih);
353 $this->img->Arc($xt+$r,$yl-$ih-$r,$r*2,$r*2,90,180);
354
355 // Indent vertical, Indent arc
356 $this->img->Line($xt+$iw,$yl-$ih+$r,$xt+$iw,$yl-$r);
357 $this->img->Arc($xt+$iw-$r,$yl-$ih+$r,$r*2,$r*2,270,360);
358
359 if( $aFillColor != '' ) {
360 $bc = $this->img->current_color_name;
361 $this->img->PushColor($aFillColor);
362 $this->img->FillToBorder($xr-$r,$yt+$r,$bc);
363 $this->img->PopColor();
364 }
365
366 break;
367 }
368 }
369}
370
371
372//===================================================
373// CLASS RectangleText
374// Description: Draws a text paragraph inside a
375// rounded, possible filled, rectangle.
376//===================================================
377class CanvasRectangleText {
378 var $ix,$iy,$iw,$ih,$ir=4;
379 var $iTxt,$iColor='black',$iFillColor='',$iFontColor='black';
380 var $iParaAlign='center';
381 var $iAutoBoxMargin=5;
382 var $iShadowWidth=3,$iShadowColor='';
383
384 function CanvasRectangleText($aTxt='',$xl=0,$yt=0,$w=0,$h=0) {
385 $this->iTxt = new Text($aTxt);
386 $this->ix = $xl;
387 $this->iy = $yt;
388 $this->iw = $w;
389 $this->ih = $h;
390 }
391
392 function SetShadow($aColor='gray',$aWidth=3) {
393 $this->iShadowColor = $aColor;
394 $this->iShadowWidth = $aWidth;
395 }
396
397 function SetFont($FontFam,$aFontStyle,$aFontSize=12) {
398 $this->iTxt->SetFont($FontFam,$aFontStyle,$aFontSize);
399 }
400
401 function SetTxt($aTxt) {
402 $this->iTxt->Set($aTxt);
403 }
404
405 function ParagraphAlign($aParaAlign) {
406 $this->iParaAlign = $aParaAlign;
407 }
408
409 function SetFillColor($aFillColor) {
410 $this->iFillColor = $aFillColor;
411 }
412
413 function SetAutoMargin($aMargin) {
414 $this->iAutoBoxMargin=$aMargin;
415 }
416
417 function SetColor($aColor) {
418 $this->iColor = $aColor;
419 }
420
421 function SetFontColor($aColor) {
422 $this->iFontColor = $aColor;
423 }
424
425 function SetPos($xl=0,$yt=0,$w=0,$h=0) {
426 $this->ix = $xl;
427 $this->iy = $yt;
428 $this->iw = $w;
429 $this->ih = $h;
430 }
431
432 function Pos($xl=0,$yt=0,$w=0,$h=0) {
433 $this->ix = $xl;
434 $this->iy = $yt;
435 $this->iw = $w;
436 $this->ih = $h;
437 }
438
439 function Set($aTxt,$xl,$yt,$w=0,$h=0) {
440 $this->iTxt->Set($aTxt);
441 $this->ix = $xl;
442 $this->iy = $yt;
443 $this->iw = $w;
444 $this->ih = $h;
445 }
446
447 function SetCornerRadius($aRad=5) {
448 $this->ir = $aRad;
449 }
450
451 function Stroke($aImg,$scale) {
452
453 // If coordinates are specifed as negative this means we should
454 // treat them as abolsute (pixels) coordinates
455 if( $this->ix > 0 ) {
456 $this->ix = $scale->TranslateX($this->ix) ;
457 }
458 else {
459 $this->ix = -$this->ix;
460 }
461
462 if( $this->iy > 0 ) {
463 $this->iy = $scale->TranslateY($this->iy) ;
464 }
465 else {
466 $this->iy = -$this->iy;
467 }
468
469 list($this->iw,$this->ih) = $scale->Translate($this->iw,$this->ih) ;
470
471 if( $this->iw == 0 )
472 $this->iw = round($this->iTxt->GetWidth($aImg) + $this->iAutoBoxMargin);
473 if( $this->ih == 0 ) {
474 $this->ih = round($this->iTxt->GetTextHeight($aImg) + $this->iAutoBoxMargin);
475 }
476
477 if( $this->iShadowColor != '' ) {
478 $aImg->PushColor($this->iShadowColor);
479 $aImg->FilledRoundedRectangle($this->ix+$this->iShadowWidth,
480 $this->iy+$this->iShadowWidth,
481 $this->ix+$this->iw-1+$this->iShadowWidth,
482 $this->iy+$this->ih-1+$this->iShadowWidth,
483 $this->ir);
484 $aImg->PopColor();
485 }
486
487 if( $this->iFillColor != '' ) {
488 $aImg->PushColor($this->iFillColor);
489 $aImg->FilledRoundedRectangle($this->ix,$this->iy,
490 $this->ix+$this->iw-1,
491 $this->iy+$this->ih-1,
492 $this->ir);
493 $aImg->PopColor();
494 }
495
496 if( $this->iColor != '' ) {
497 $aImg->PushColor($this->iColor);
498 $aImg->RoundedRectangle($this->ix,$this->iy,
499 $this->ix+$this->iw-1,
500 $this->iy+$this->ih-1,
501 $this->ir);
502 $aImg->PopColor();
503 }
504
505 $this->iTxt->Align('center','center');
506 $this->iTxt->ParagraphAlign($this->iParaAlign);
507 $this->iTxt->SetColor($this->iFontColor);
508 $this->iTxt->Stroke($aImg, $this->ix+$this->iw/2, $this->iy+$this->ih/2);
509
510 return array($this->iw, $this->ih);
511
512 }
513
514}
515
516
517?>
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