Annotation of loncom/homework/drawimage.pm, revision 1.10
1.1 albertel 1: # The LearningOnline Network with CAPA
2: # programatic image drawing
3: #
1.10 ! raeburn 4: # $Id: drawimage.pm,v 1.9 2006/05/30 12:45:36 www Exp $
1.1 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::drawimage;
30: use strict;
31: use Apache::loncommon;
1.9 www 32: use lib '/home/httpd/lib/perl/';
33: use LONCAPA;
34:
1.1 albertel 35:
36: my %args;
37: my $cgi_id;
1.7 albertel 38: my @cgi_ids;
1.1 albertel 39: BEGIN {
40: &Apache::lonxml::register('Apache::drawimage',('drawimage'));
41: }
42:
43: sub start_drawimage {
44: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7 albertel 45: &Apache::lonxml::register('Apache::drawimage',('text','line','rectangle','arc','fill','polygon','image'));
1.1 albertel 46: if ($target eq 'web' || $target eq 'tex') {
1.7 albertel 47: my $new_id=&Apache::loncommon::get_cgi_id();
48: if ($cgi_id) { push(@cgi_ids,$cgi_id); } else { undef(%args); }
49: $cgi_id=$new_id;
1.1 albertel 50: }
1.7 albertel 51: return '';
1.1 albertel 52: }
53:
54: sub end_drawimage {
55: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
56: my $result;
57: if ($target eq 'web' || $target eq 'tex') {
1.7 albertel 58: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
59: my $height =&Apache::lonxml::get_param('height',$parstack,$safeeval);
60: my $bgcolor =&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
61: if (!$width) { $width=300; }
62: if (!$height) { $height=300; }
63: $result.="<img width='$width' height='$height'
1.1 albertel 64: src='/adm/randomlabel.png?token=$cgi_id' />\n";
1.7 albertel 65: $args{"cgi.$cgi_id.SIZE"}=join(':',($width,$height));
66: $args{"cgi.$cgi_id.BGCOLOR"}=join(':',($bgcolor));
1.10 ! raeburn 67: &Apache::lonnet::appenv(\%args);
1.7 albertel 68: if (@cgi_ids) {
69: $cgi_id=pop(@cgi_ids);
70: } else {
71: undef($cgi_id);
1.1 albertel 72: }
1.7 albertel 73: } elsif ($target eq 'edit') {
74: } elsif ($target eq 'modified') {
1.1 albertel 75: }
1.7 albertel 76:
77: &Apache::lonxml::register('Apache::drawimage',
78: ('text','line','rectangle','arc','fill',
79: 'polygon'));
1.4 matthew 80: return $result;
81: }
82:
1.5 albertel 83: sub start_text {
1.4 matthew 84: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
85: my $result;
86: if ($target eq 'web' || $target eq 'tex') {
1.6 albertel 87: &Apache::lonxml::startredirection();
88: }
89: return $result;
90: }
91:
92: sub end_text {
93: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
94: my $result;
95: if ($target eq 'web' || $target eq 'tex') {
1.4 matthew 96: my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
97: my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
98: my $font = &Apache::lonxml::get_param('font',$parstack,$safeeval);
99: my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
1.5 albertel 100: my $direction = &Apache::lonxml::get_param('direction',$parstack,$safeeval);
1.6 albertel 101: my $text = &Apache::lonxml::endredirection();
1.9 www 102: $text = &escape($text);
1.4 matthew 103: $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
104: my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.5 albertel 105: $args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$text,$font,$color,$direction));
1.4 matthew 106: }
1.1 albertel 107: return $result;
108: }
109:
110: sub start_line {
111: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
112: my $result;
113: if ($target eq 'web' || $target eq 'tex') {
114: my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
115: my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
116: my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
117: my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
118: my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
119: my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
1.3 albertel 120: my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1 albertel 121: $args{"cgi.$cgi_id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,$color,$thickness));
122: $args{"cgi.$cgi_id.OBJTYPE"}.='LINE:';
123: }
124: return $result;
125: }
126:
127: sub end_line {
128: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
129: my $result;
130: return $result;
131: }
132:
133: sub start_rectangle {
134: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
135: my $result;
136: if ($target eq 'web' || $target eq 'tex') {
137: my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
138: my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
139: my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
140: my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
141: my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
142: my $thickness = &Apache::lonxml::get_param('thickness',$parstack,
143: $safeeval);
144: my $filled = &Apache::lonxml::get_param('filled',$parstack,
145: $safeeval);
1.3 albertel 146: my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1 albertel 147: $args{"cgi.$cgi_id.OBJ$i"}=
148: join(':',($x1,$y1,$x2,$y2,$color,$thickness,$filled));
149: $args{"cgi.$cgi_id.OBJTYPE"}.='RECTANGLE:';
150: }
151: return $result;
152: }
153:
154: sub end_rectangle {
155: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
156: my $result;
157: return $result;
158: }
159:
160: sub start_arc {
161: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
162: my $result;
163: if ($target eq 'web' || $target eq 'tex') {
164: my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
165: my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
166: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
167: my $height = &Apache::lonxml::get_param('height',$parstack,$safeeval);
168: my $start = &Apache::lonxml::get_param('start',$parstack,$safeeval);
169: my $end = &Apache::lonxml::get_param('end',$parstack,$safeeval);
170: my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
171: my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
172: my $filled = &Apache::lonxml::get_param('filled',$parstack,$safeeval);
1.3 albertel 173: my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1 albertel 174: $args{"cgi.$cgi_id.OBJ$i"}=
175: join(':',($x,$y,$width,$height,$start,$end,$color,$thickness,
176: $filled));
177: $args{"cgi.$cgi_id.OBJTYPE"}.='ARC:';
178: }
179: return $result;
180: }
181:
182: sub end_arc {
183: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
184: my $result;
185: return $result;
186: }
187:
1.2 albertel 188: sub start_fill {
1.1 albertel 189: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
190: my $result;
191: if ($target eq 'web' || $target eq 'tex') {
192: my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
193: my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
194: my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
1.3 albertel 195: my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1 albertel 196: $args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$color));
197: $args{"cgi.$cgi_id.OBJTYPE"}.='FILL:';
198: }
199: return $result;
200: }
201:
1.2 albertel 202: sub end_fill {
1.1 albertel 203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
204: my $result;
205: return $result;
206: }
207:
1.7 albertel 208: my @polygon;
209: sub start_polygon {
210: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
211: my $result;
212: &Apache::lonxml::register('Apache::drawimage',('point'));
213: if ($target eq 'web') {
214: undef(@polygon);
215: }
216: return $result;
217: }
218:
219: sub end_polygon {
220: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
221: my $result;
222: if ($target eq 'web') {
223: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
224: my $filled=&Apache::lonxml::get_param('filled',$parstack,$safeeval);
225: my $open=&Apache::lonxml::get_param('open',$parstack,$safeeval);
226: my $thickness = &Apache::lonxml::get_param('thickness',$parstack,
227: $safeeval);
228: my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
229: $args{"cgi.$cgi_id.OBJTYPE"}.='POLYGON:';
230: $args{"cgi.$cgi_id.OBJ$i"}=join(':',($color,$thickness,$open,$filled));
231: $args{"cgi.$cgi_id.OBJEXTRA$i"}=join('-',@polygon);
232: }
233: &Apache::lonxml::deregister('Apache::drawimage',('point'));
234: return $result;
235: }
236:
237: sub start_point {
238: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
239: my $result;
240: if ($target eq 'web') {
241: my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
242: my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
243: push (@polygon,"($x,$y)");
244: }
245: return $result;
246: }
247:
248: sub end_point {
249: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
250: my $result;
251: return $result;
252: }
253:
254: sub start_image {
255: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
256: my $result;
257: if ($target eq 'web' || $target eq 'tex') {
258: &Apache::lonxml::startredirection();
259: }
260: return $result;
261: }
1.1 albertel 262:
1.7 albertel 263: sub end_image {
264: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
265: my $result;
266: if ($target eq 'web' || $target eq 'tex') {
267: my $bgimg=&Apache::lonxml::endredirection();
268: my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
269: my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
270: my $clipx = &Apache::lonxml::get_param('clipx',$parstack,$safeeval);
271: my $clipy = &Apache::lonxml::get_param('clipy',$parstack,$safeeval);
272: my $clipwidth =
273: &Apache::lonxml::get_param('clipwidth',$parstack,$safeeval);
274: my $clipheight =
275: &Apache::lonxml::get_param('clipheight',$parstack,$safeeval);
276: my $scaledwidth =
277: &Apache::lonxml::get_param('scaledwidth',$parstack,$safeeval);
278: my $scaledheight =
279: &Apache::lonxml::get_param('scaledheight',$parstack,$safeeval);
280: my $transparent =
281: &Apache::lonxml::get_param('transparent',$parstack,$safeeval);
282: $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
283: my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
284: $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
285: $args{"cgi.$cgi_id.OBJ$i"} =
1.9 www 286: join(':',($x,$y,&escape($bgimg),$transparent,
1.7 albertel 287: $clipx,$clipy,$scaledwidth,$scaledheight,$clipwidth,$clipheight));
288: }
289: return $result;
290: }
1.1 albertel 291: 1;
292: __END__
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