Annotation of loncom/xml/lonplot.pm, revision 1.23
1.1 matthew 1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
1.23 ! matthew 4: # $Id: lonplot.pm,v 1.22 2001/12/28 19:04:56 matthew Exp $
1.1 matthew 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: #
1.3 matthew 28: # 12/15/01 Matthew
1.22 matthew 29: # 12/17 12/18 12/19 12/20 12/21 12/27 12/28 Matthew
1.1 matthew 30: package Apache::lonplot;
1.10 matthew 31:
1.1 matthew 32: use strict;
1.10 matthew 33: use Apache::File;
1.1 matthew 34: use Apache::response;
1.2 matthew 35: use Apache::lonxml;
1.20 matthew 36: use Apache::edit;
1.10 matthew 37:
1.1 matthew 38: sub BEGIN {
39: &Apache::lonxml::register('Apache::lonplot',('plot'));
40: }
41:
1.10 matthew 42: ##
43: ## Description of data structures:
44: ##
45: ## %plot %key %axis
46: ## --------------------------
47: ## height title color
48: ## width box xmin
49: ## bgcolor pos xmax
50: ## fgcolor ymin
51: ## transparent ymax
52: ## grid
53: ## border
54: ## font
1.19 matthew 55: ## align
1.10 matthew 56: ##
57: ## @labels: $labels[$i] = \%label
58: ## %label: text, xpos, ypos, justify
1.14 matthew 59: ##
1.10 matthew 60: ## @curves: $curves[$i] = \%curve
1.14 matthew 61: ## %curve: name, linestyle, ( function | data )
1.10 matthew 62: ##
63: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
64: ## [y1,y2,y3,y4] ]
65: ##
1.21 matthew 66:
67: ###################################################################
68: ## ##
69: ## Tests used in checking the validitity of input ##
70: ## ##
71: ###################################################################
1.11 matthew 72: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
1.19 matthew 73: my $real_test =
74: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
1.11 matthew 75: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-f]{6}$/};
1.1 matthew 76: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
1.15 matthew 77: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
1.1 matthew 78: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
79: my $linestyle_test = sub {$_[0]=~/^(lines|linespoints|dots|points|steps)$/};
1.15 matthew 80: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w\(\)]+ ?)+$/};
1.21 matthew 81:
82: ###################################################################
83: ## ##
84: ## Attribute metadata ##
85: ## ##
86: ###################################################################
1.1 matthew 87: my %plot_defaults =
88: (
1.20 matthew 89: height => {
90: default => 200,
91: test => $int_test,
92: description => 'vertical size of image (pixels)',
93: edit_type => 'entry'
94: },
95: width => {
96: default => 200,
97: test => $int_test,
98: description => 'horizontal size of image (pixels)',
99: edit_type => 'entry'
100: },
101: bgcolor => {
102: default => 'xffffff',
103: test => $color_test,
104: description => 'background color of image (xffffff)',
105: edit_type => 'entry'
106: },
107: fgcolor => {
108: default => 'x000000',
109: test => $color_test,
110: description => 'foreground color of image (x000000)',
111: edit_type => 'entry'
112: },
113: transparent => {
114: default => 'off',
115: test => $onoff_test,
116: description => '',
117: edit_type => 'on_off'
118: },
119: grid => {
120: default => 'off',
121: test => $onoff_test,
122: description => '',
123: edit_type => 'on_off'
124: },
125: border => {
126: default => 'on',
127: test => $onoff_test,
128: description => '',
129: edit_type => 'on_off'
130: },
131: font => {
132: default => 'medium',
133: test => $sml_test,
134: description => 'Size of font to use',
135: edit_type => 'choice',
136: choices => ['small','medium','large']
137: },
138: align => {
139: default => 'left',
140: test => sub {$_[0]=~/^(left|right|center)$/},
141: description => 'alignment for image in html',
142: edit_type => 'choice',
143: choices => ['left','right','center']
144: }
1.1 matthew 145: );
146:
147: my %key_defaults =
148: (
1.20 matthew 149: title => {
150: default => '',
151: test => $words_test,
152: description => 'Title of key',
153: edit_type => 'entry'
154: },
155: box => {
156: default => 'off',
157: test => $onoff_test,
158: description => 'Draw a box around the key?',
159: edit_type => 'on_off'
160: },
161: pos => {
162: default => 'top right',
163: test => $key_pos_test,
164: description => 'position of the key on the plot',
165: edit_type => 'choice',
166: choices => ['top left','top right','bottom left','bottom right',
167: 'outside','below']
168: }
1.1 matthew 169: );
170:
171: my %label_defaults =
172: (
1.20 matthew 173: xpos => {
174: default => 0,
175: test => $real_test,
176: description => 'x position of label (graph coordinates)',
177: edit_type => 'entry'
178: },
179: ypos => {
180: default => 0,
181: test => $real_test,
182: description => 'y position of label (graph coordinates)',
183: edit_type => 'entry'
184: },
185: justify => {
186: default => 'left',
187: test => sub {$_[0]=~/^(left|right|center)$/},
188: description => 'justification of the label text on the plot',
189: edit_type => 'choice',
190: choices => ['left','right','center']
191: }
1.1 matthew 192: );
193:
194: my %axis_defaults =
195: (
1.20 matthew 196: color => {
197: default => 'x000000',
198: test => $color_test,
199: description => 'color of axes (x000000)',
200: edit_type => 'entry'
201: },
202: xmin => {
203: default => '-10.0',
204: test => $real_test,
205: description => 'minimum x-value shown in plot',
206: edit_type => 'entry'
207: },
208: xmax => {
209: default => ' 10.0',
210: test => $real_test,
211: description => 'maximum x-value shown in plot',
212: edit_type => 'entry'
213: },
214: ymin => {
215: default => '-10.0',
216: test => $real_test,
217: description => 'minimum y-value shown in plot',
218: edit_type => 'entry'
219: },
220: ymax => {
221: default => ' 10.0',
222: test => $real_test,
223: description => 'maximum y-value shown in plot',
224: edit_type => 'entry'
225: },
226: linestyle => {
227: default => 'points',
228: test => $linestyle_test,
229: description => 'Style of the axis lines',
230: edit_type => 'choice',
231: choices => ['lines','linespoints','dots','points']
232: }
1.1 matthew 233: );
234:
235: my %curve_defaults =
236: (
1.20 matthew 237: color => {
238: default => 'x000000',
239: test => $color_test,
240: description => 'color of curve (x000000)',
241: edit_type => 'entry'
242: },
243: name => {
244: default => '',
245: test => $words_test,
246: description => 'name of curve to appear in key',
247: edit_type => 'entry'
248: },
249: linestyle => {
250: default => 'lines',
251: test => $linestyle_test,
252: description => 'Style of the axis lines',
253: edit_type => 'choice',
254: choices => ['lines','linespoints','dots','points','steps']
255: }
1.1 matthew 256: );
257:
1.21 matthew 258: ###################################################################
259: ## ##
260: ## parsing and edit rendering ##
261: ## ##
262: ###################################################################
1.1 matthew 263: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves);
264:
265: sub start_plot {
1.23 ! matthew 266: %plot = (); %key = (); %axis = ();
1.10 matthew 267: $title = undef; $xlabel = undef; $ylabel = undef;
268: $#labels = -1; $#curves = -1;
1.6 matthew 269: #
1.1 matthew 270: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
271: my $result='';
1.4 matthew 272: if ($target eq 'web') {
1.17 matthew 273: &Apache::lonxml::register('Apache::lonplot',
274: ('title','xlabel','ylabel','key','axis','label','curve'));
275: push (@Apache::lonxml::namespace,'plot');
276: ## Always evaluate the insides of the <plot></plot> tags
277: my $inside = &Apache::lonxml::get_all_text("/plot",$$parser[-1]);
278: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
279: &Apache::lonxml::newparser($parser,\$inside);
280: ##-------------------------------------------------------
281: &get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval,
282: $tagstack->[-1]);
1.20 matthew 283: } elsif ($target eq 'edit') {
1.21 matthew 284: $result .= &Apache::edit::tag_start($target,$token);
285: $result .= &edit_attributes($target,$token,\%plot_defaults);
1.20 matthew 286: } elsif ($target eq 'modified') {
287: my $constructtag=&Apache::edit::get_new_args
288: ($token,$parstack,$safeeval,keys %plot_defaults);
289: if ($constructtag) {
290: $result = &Apache::edit::rebuild_tag($token);
291: $result.= &Apache::edit::handle_insert();
292: }
1.4 matthew 293: }
1.21 matthew 294: return $result;
1.1 matthew 295: }
296:
297: sub end_plot {
298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
299: pop @Apache::lonxml::namespace;
1.4 matthew 300: &Apache::lonxml::deregister('Apache::lonplot',
301: ('title','xlabel','ylabel','key','axis','label','curve'));
302: my $result = '';
303: if ($target eq 'web') {
1.21 matthew 304: &check_inputs(); # Make sure we have all the data we need
1.13 matthew 305: ##
306: ## Determine filename
1.4 matthew 307: my $tmpdir = '/home/httpd/perl/tmp/';
1.12 matthew 308: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
1.13 matthew 309: '_'.time.'_'.$$.'_plot.data';
1.4 matthew 310: ## Write the plot description to the file
1.12 matthew 311: my $fh=Apache::File->new(">$tmpdir$filename");
312: print $fh &write_gnuplot_file();
1.14 matthew 313: close($fh);
1.4 matthew 314: ## return image tag for the plot
1.12 matthew 315: $result .= <<"ENDIMAGE";
1.16 matthew 316: <img src = "/cgi-bin/plot.gif?$filename"
317: width = "$plot{'width'}"
318: height = "$plot{'height'}"
319: align = "$plot{'align'}"
320: alt = "/cgi-bin/plot.gif?$filename" />
1.12 matthew 321: ENDIMAGE
1.20 matthew 322: } elsif ($target eq 'edit') {
1.21 matthew 323: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 324: }
1.1 matthew 325: return $result;
326: }
1.2 matthew 327:
1.1 matthew 328: ##----------------------------------------------------------------- key
329: sub start_key {
330: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
331: my $result='';
1.17 matthew 332: if ($target eq 'web') {
333: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
1.11 matthew 334: $tagstack->[-1]);
1.20 matthew 335: } elsif ($target eq 'edit') {
1.21 matthew 336: $result .= &Apache::edit::tag_start($target,$token);
337: $result .= &edit_attributes($target,$token,\%key_defaults);
1.20 matthew 338: } elsif ($target eq 'modified') {
339: my $constructtag=&Apache::edit::get_new_args
340: ($token,$parstack,$safeeval,keys %key_defaults);
341: if ($constructtag) {
342: $result = &Apache::edit::rebuild_tag($token);
343: $result.= &Apache::edit::handle_insert();
344: }
1.4 matthew 345: }
1.1 matthew 346: return $result;
347: }
348:
349: sub end_key {
350: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
351: my $result = '';
1.4 matthew 352: if ($target eq 'web') {
1.20 matthew 353: } elsif ($target eq 'edit') {
1.21 matthew 354: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 355: }
1.1 matthew 356: return $result;
357: }
1.21 matthew 358:
1.1 matthew 359: ##------------------------------------------------------------------- title
360: sub start_title {
361: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
362: my $result='';
1.4 matthew 363: if ($target eq 'web') {
1.17 matthew 364: $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
1.20 matthew 365: } elsif ($target eq 'edit') {
1.22 matthew 366: $result.=&Apache::edit::tag_start($target,$token);
367: my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]);
368: $result.='</td></tr><tr><td colspan="3">'.
369: &Apache::edit::editfield('',$text,'',20,1).
370: &Apache::edit::end_table();
1.20 matthew 371: } elsif ($target eq 'modified') {
1.21 matthew 372: my $text=$$parser[-1]->get_text("/function");
373: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 374: }
1.1 matthew 375: return $result;
376: }
377:
378: sub end_title {
379: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
380: my $result = '';
1.4 matthew 381: if ($target eq 'web') {
1.20 matthew 382: } elsif ($target eq 'edit') {
1.22 matthew 383: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 384: }
1.1 matthew 385: return $result;
386: }
387: ##------------------------------------------------------------------- xlabel
388: sub start_xlabel {
389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
390: my $result='';
1.4 matthew 391: if ($target eq 'web') {
1.17 matthew 392: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
1.20 matthew 393: } elsif ($target eq 'edit') {
1.22 matthew 394: $result.=&Apache::edit::tag_start($target,$token);
395: my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
396: $result.='</td></tr><tr><td colspan="3">'.
397: &Apache::edit::editfield('',$text,'',20,1).
398: &Apache::edit::end_table();
1.20 matthew 399: } elsif ($target eq 'modified') {
1.21 matthew 400: my $text=$$parser[-1]->get_text("/function");
401: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 402: }
1.1 matthew 403: return $result;
404: }
405:
406: sub end_xlabel {
407: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
408: my $result = '';
1.4 matthew 409: if ($target eq 'web') {
1.20 matthew 410: } elsif ($target eq 'edit') {
1.22 matthew 411: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 412: }
1.1 matthew 413: return $result;
414: }
1.21 matthew 415:
1.1 matthew 416: ##------------------------------------------------------------------- ylabel
417: sub start_ylabel {
418: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
419: my $result='';
1.4 matthew 420: if ($target eq 'web') {
1.17 matthew 421: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
1.20 matthew 422: } elsif ($target eq 'edit') {
1.22 matthew 423: $result .= &Apache::edit::tag_start($target,$token);
424: my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
425: $result .= '</td></tr><tr><td colspan="3">'.
426: &Apache::edit::editfield('',$text,'',20,1).
427: &Apache::edit::end_table();
1.20 matthew 428: } elsif ($target eq 'modified') {
1.21 matthew 429: my $text=$$parser[-1]->get_text("/function");
430: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 431: }
1.1 matthew 432: return $result;
433: }
434:
435: sub end_ylabel {
436: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
437: my $result = '';
1.4 matthew 438: if ($target eq 'web') {
1.20 matthew 439: } elsif ($target eq 'edit') {
1.22 matthew 440: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 441: }
1.1 matthew 442: return $result;
443: }
1.21 matthew 444:
1.1 matthew 445: ##------------------------------------------------------------------- label
446: sub start_label {
447: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
448: my $result='';
1.17 matthew 449: if ($target eq 'web') {
450: my %label;
451: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1.11 matthew 452: $tagstack->[-1]);
1.17 matthew 453: $label{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
454: if (! &$words_test($label{'text'})) {
455: # I should probably warn about it, too.
456: $label{'text'} = 'Illegal text';
457: }
458: push(@labels,\%label);
1.20 matthew 459: } elsif ($target eq 'edit') {
1.21 matthew 460: $result .= &Apache::edit::tag_start($target,$token);
461: $result .= &edit_attributes($target,$token,\%label_defaults);
1.22 matthew 462: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
463: $result .= '</td></tr><tr><td colspan="3">'.
464: &Apache::edit::editfield('',$text,'',20,1).
465: &Apache::edit::end_table();
1.20 matthew 466: } elsif ($target eq 'modified') {
467: my $constructtag=&Apache::edit::get_new_args
468: ($token,$parstack,$safeeval,keys %label_defaults);
469: if ($constructtag) {
470: $result = &Apache::edit::rebuild_tag($token);
471: $result.= &Apache::edit::handle_insert();
472: }
1.22 matthew 473: my $text=$$parser[-1]->get_text("/label");
1.21 matthew 474: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 475: }
1.1 matthew 476: return $result;
477: }
478:
479: sub end_label {
480: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
481: my $result = '';
1.4 matthew 482: if ($target eq 'web') {
1.20 matthew 483: } elsif ($target eq 'edit') {
1.21 matthew 484: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 485: }
1.1 matthew 486: return $result;
487: }
488:
489: ##------------------------------------------------------------------- curve
490: sub start_curve {
491: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
492: my $result='';
1.17 matthew 493: if ($target eq 'web') {
494: my %curve;
495: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1.11 matthew 496: $tagstack->[-1]);
1.17 matthew 497: push (@curves,\%curve);
498: &Apache::lonxml::register('Apache::lonplot',('function','data'));
499: push (@Apache::lonxml::namespace,'curve');
1.20 matthew 500: } elsif ($target eq 'edit') {
1.21 matthew 501: $result .= &Apache::edit::tag_start($target,$token);
502: $result .= &edit_attributes($target,$token,\%curve_defaults);
1.20 matthew 503: } elsif ($target eq 'modified') {
504: my $constructtag=&Apache::edit::get_new_args
505: ($token,$parstack,$safeeval,keys %label_defaults);
506: if ($constructtag) {
507: $result = &Apache::edit::rebuild_tag($token);
508: $result.= &Apache::edit::handle_insert();
509: }
1.4 matthew 510: }
1.1 matthew 511: return $result;
512: }
513:
514: sub end_curve {
515: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
516: my $result = '';
1.4 matthew 517: if ($target eq 'web') {
1.17 matthew 518: pop @Apache::lonxml::namespace;
519: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1.20 matthew 520: } elsif ($target eq 'edit') {
1.21 matthew 521: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 522: }
1.1 matthew 523: return $result;
524: }
1.21 matthew 525:
1.1 matthew 526: ##------------------------------------------------------------ curve function
527: sub start_function {
528: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
529: my $result='';
1.4 matthew 530: if ($target eq 'web') {
1.17 matthew 531: if (exists($curves[-1]->{'data'})) {
532: &Apache::lonxml::warning('Use of <function> precludes use of <data>. The <data> will be omitted in favor of the <function> declaration.');
533: delete $curves[-1]->{'data'} ;
534: }
535: $curves[-1]->{'function'} =
536: &Apache::lonxml::get_all_text("/function",$$parser[-1]);
1.20 matthew 537: } elsif ($target eq 'edit') {
1.22 matthew 538: $result .= &Apache::edit::tag_start($target,$token);
539: my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
540: $result .= '</td></tr><tr><td colspan="3">'.
1.20 matthew 541: &Apache::edit::editfield('',$text,'',20,1).
542: &Apache::edit::end_table();
1.22 matthew 543:
1.20 matthew 544: } elsif ($target eq 'modified') {
545: # Why do I do this?
546: my $text=$$parser[-1]->get_text("/function");
547: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 548: }
1.1 matthew 549: return $result;
550: }
551:
552: sub end_function {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
554: my $result = '';
1.4 matthew 555: if ($target eq 'web') {
1.20 matthew 556: } elsif ($target eq 'edit') {
1.4 matthew 557: }
1.1 matthew 558: return $result;
559: }
1.21 matthew 560:
1.1 matthew 561: ##------------------------------------------------------------ curve data
562: sub start_data {
563: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
564: my $result='';
1.4 matthew 565: if ($target eq 'web') {
1.17 matthew 566: if (exists($curves[-1]->{'function'})) {
567: &Apache::lonxml::warning('Use of <data> precludes use of .'.
568: '<function>. The <function> will be omitted in favor of '.
569: 'the <data> declaration.');
570: delete($curves[-1]->{'function'});
571: }
572: my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
573: $datatext =~ s/\s+/ /g;
574: # Need to do some error checking on the @data array -
575: # make sure it's all numbers and make sure each array
576: # is of the same length.
577: my @data;
578: if ($datatext =~ /,/) {
579: @data = split /,/,$datatext;
580: } else { # Assume it's space seperated.
581: @data = split / /,$datatext;
582: }
583: for (my $i=0;$i<=$#data;$i++) {
584: # Check that it's non-empty
1.19 matthew 585: if (! defined($data[$i])) {
586: &Apache::lonxml::warning(
587: 'undefined <data> value. Replacing with '.
588: ' pi/e = 1.15572734979092');
589: $data[$i] = 1.15572734979092;
590: }
1.17 matthew 591: # Check that it's a number
1.19 matthew 592: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
593: &Apache::lonxml::warning(
594: 'Bad <data> value of '.$data[$i].' Replacing with '.
595: ' pi/e = 1.15572734979092');
596: $data[$i] = 1.15572734979092;
597: }
1.17 matthew 598: }
599: push @{$curves[-1]->{'data'}},\@data;
1.20 matthew 600: } elsif ($target eq 'edit') {
1.22 matthew 601: $result .= &Apache::edit::tag_start($target,$token);
602: my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
603: $result .= '</td></tr><tr><td colspan="3">'.
604: &Apache::edit::editfield('',$text,'',20,1).
605: &Apache::edit::end_table();
1.20 matthew 606: } elsif ($target eq 'modified') {
1.21 matthew 607: my $text=$$parser[-1]->get_text("/data");
608: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 609: }
1.1 matthew 610: return $result;
611: }
612:
613: sub end_data {
614: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
615: my $result = '';
1.4 matthew 616: if ($target eq 'web') {
1.20 matthew 617: } elsif ($target eq 'edit') {
1.4 matthew 618: }
1.1 matthew 619: return $result;
620: }
621:
622: ##------------------------------------------------------------------- axis
623: sub start_axis {
624: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
625: my $result='';
1.4 matthew 626: if ($target eq 'web') {
1.17 matthew 627: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
628: $tagstack->[-1]);
1.20 matthew 629: } elsif ($target eq 'edit') {
1.21 matthew 630: $result .= &Apache::edit::tag_start($target,$token);
631: $result .= &edit_attributes($target,$token,\%axis_defaults);
1.20 matthew 632: } elsif ($target eq 'modified') {
1.4 matthew 633: }
1.1 matthew 634: return $result;
635: }
636:
637: sub end_axis {
638: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
639: my $result = '';
1.4 matthew 640: if ($target eq 'web') {
1.20 matthew 641: } elsif ($target eq 'edit') {
1.21 matthew 642: $result.=&Apache::edit::tag_end($target,$token);
1.20 matthew 643: } elsif ($target eq 'modified') {
644: my $constructtag=&Apache::edit::get_new_args
645: ($token,$parstack,$safeeval,keys %axis_defaults);
646: if ($constructtag) {
647: $result = &Apache::edit::rebuild_tag($token);
648: $result.= &Apache::edit::handle_insert();
649: }
1.4 matthew 650: }
1.1 matthew 651: return $result;
652: }
653:
1.21 matthew 654: ###################################################################
655: ## ##
656: ## Utility Functions ##
657: ## ##
658: ###################################################################
659:
1.13 matthew 660: ##----------------------------------------------------------- set_defaults
661: sub set_defaults {
1.21 matthew 662: my ($var,$defaults) = @_;
1.13 matthew 663: my $key;
664: foreach $key (keys %$defaults) {
665: $var->{$key} = $defaults->{$key}->{'default'};
666: }
667: }
668:
1.1 matthew 669: ##------------------------------------------------------------------- misc
1.2 matthew 670: sub get_attributes{
1.21 matthew 671: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1.19 matthew 672: foreach my $attr (keys %{$defaults}) {
1.10 matthew 673: $values->{$attr} =
1.15 matthew 674: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1.10 matthew 675: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1.11 matthew 676: $values->{$attr} = $defaults->{$attr}->{'default'};
1.6 matthew 677: next;
678: }
1.10 matthew 679: my $test = $defaults->{$attr}->{'test'};
680: if (! &$test($values->{$attr})) {
1.6 matthew 681: &Apache::lonxml::warning
682: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1.11 matthew 683: .$defaults->{$attr}->{'default'} );
684: $values->{$attr} = $defaults->{$attr}->{'default'};
1.10 matthew 685: }
1.2 matthew 686: }
1.11 matthew 687: return ;
1.6 matthew 688: }
1.15 matthew 689: ##------------------------------------------------------- write_gnuplot_file
1.6 matthew 690: sub write_gnuplot_file {
691: my $gnuplot_input = '';
1.10 matthew 692: my $curve;
1.6 matthew 693: # Collect all the colors
694: my @Colors;
695: push @Colors, $plot{'bgcolor'};
696: push @Colors, $plot{'fgcolor'};
1.13 matthew 697: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1.9 matthew 698: foreach $curve (@curves) {
699: push @Colors, ($curve->{'color'} ne '' ?
700: $curve->{'color'} :
1.13 matthew 701: $plot{'fgcolor'} );
1.6 matthew 702: }
703: # set term
704: $gnuplot_input .= 'set term gif ';
705: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
706: $gnuplot_input .= $plot{'font'} . ' ';
1.10 matthew 707: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1.6 matthew 708: $gnuplot_input .= "@Colors\n";
1.7 matthew 709: # grid
1.10 matthew 710: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1.7 matthew 711: # border
1.9 matthew 712: $gnuplot_input .= ($plot{'border'} eq 'on'?
713: 'set border'.$/ :
714: 'set noborder'.$/ ); # title, xlabel, ylabel
1.13 matthew 715: $gnuplot_input .= "set output\n";
716: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
717: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
718: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
1.23 ! matthew 719: if (%axis) {
1.13 matthew 720: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
721: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1.6 matthew 722: }
723: # Key
1.23 ! matthew 724: if (%key) {
1.9 matthew 725: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
726: if ($key{'title'} ne '') {
1.11 matthew 727: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
728: }
729: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1.6 matthew 730: } else {
1.9 matthew 731: $gnuplot_input .= 'set nokey'.$/;
1.13 matthew 732: }
1.6 matthew 733: # labels
1.10 matthew 734: my $label;
1.6 matthew 735: foreach $label (@labels) {
736: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1.9 matthew 737: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
1.6 matthew 738: }
739: # curves
740: $gnuplot_input .= 'plot ';
741: my $datatext = '';
1.9 matthew 742: for (my $i = 0;$i<=$#curves;$i++) {
743: $curve = $curves[$i];
744: $gnuplot_input.= ', ' if ($i > 0);
1.6 matthew 745: if (exists($curve->{'function'})) {
1.9 matthew 746: $gnuplot_input.=
747: $curve->{'function'}.' title "'.
748: $curve->{'name'}.'" with '.
749: $curve->{'linestyle'};
1.6 matthew 750: } elsif (exists($curve->{'data'})) {
1.9 matthew 751: $gnuplot_input.= '\'-\' title "'.
752: $curve->{'name'}.'" with '.
753: $curve->{'linestyle'};
1.6 matthew 754: my @Data = @{$curve->{'data'}};
1.9 matthew 755: my @Data0 = @{$Data[0]};
756: for (my $i =0; $i<=$#Data0; $i++) {
1.10 matthew 757: my $dataset;
1.6 matthew 758: foreach $dataset (@Data) {
1.9 matthew 759: $datatext .= $dataset->[$i] . ' ';
1.6 matthew 760: }
1.9 matthew 761: $datatext .= $/;
1.6 matthew 762: }
1.9 matthew 763: $datatext .=$/;
1.6 matthew 764: }
765: }
1.9 matthew 766: $gnuplot_input .= $/.$datatext;
1.10 matthew 767: return $gnuplot_input;
1.2 matthew 768: }
1.21 matthew 769:
770: #---------------------------------------------- check_inputs
771: sub check_inputs {
772: ## Note: no inputs, no outputs - this acts only on global variables.
773: ## Make sure we have all the input we need:
1.23 ! matthew 774: if (! %plot) { &set_defaults(\%plot,\%plot_defaults); }
! 775: if (! %key ) {} # No key for this plot, thats okay
! 776: if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1.21 matthew 777: if (! defined($title )) {} # No title for this plot, thats okay
778: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
779: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
780: if ($#labels < 0) { } # No labels for this plot, thats okay
781: if ($#curves < 0) {
782: &Apache::lonxml::warning("No curves specified for plot!!!!");
783: return '';
784: }
785: my $curve;
786: foreach $curve (@curves) {
787: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
788: &Apache::lonxml::warning("One of the curves specified did not contain any <data> or <function> declarations\n");
789: return '';
790: }
791: }
792: }
793:
1.20 matthew 794: #------------------------------------------------ make_edit
795: sub edit_attributes {
1.21 matthew 796: my ($target,$token,$defaults) = @_;
1.20 matthew 797: my $result;
1.21 matthew 798: foreach my $attr (%$defaults) {
1.20 matthew 799: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
800: $result .= &Apache::edit::text_arg(
801: $defaults->{$attr}->{'description'},
802: $attr,
803: $token);
804: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
805: $result .= &Apache::edit::select_arg(
806: $defaults->{$attr}->{'description'},
807: $attr,
808: $defaults->{$attr}->{'choices'},
809: $token);
810: }
811: }
812: return $result;
813: }
1.1 matthew 814:
1.21 matthew 815:
816: ###################################################################
817: ## ##
818: ## Insertion functions for editing plots ##
819: ## ##
820: ###################################################################
821:
1.20 matthew 822: #------------------------------------------------ insert_xxxxxxx
823: sub insert_plot {
824: my $result;
825: # plot attributes
826: $result .= '<plot ';
827: foreach my $attr (%plot_defaults) {
828: $result .= ' '.$attr.' "'.$plot_defaults{$attr}->{'default'}.
829: "\"\n";
830: }
831: $result .= ">\n";
832: # Add the components
833: $result .= &insert_key();
834: $result .= &insert_axis();
835: $result .= &insert_label();
836: $result .= &insert_curve();
837: $result .= &insert_function();
838: $result .= "</curve>\n";
839: $result .= &insert_curve();
840: $result .= &insert_data();
841: $result .= "</curve>\n";
842: # close up the <plot>
843: $result .= "</plot>\n";
844: return $result;
845: }
846:
847: sub insert_key {
848: my $result;
849: $result .= ' <key ';
850: foreach my $attr (%key_defaults) {
851: $result .= ' '.$attr.' "'.$key_defaults{$attr}->{'default'}.
852: "\"\n";
853: }
854: $result .= " />\n";
855: return $result;
856: }
857:
858: sub insert_axis{
859: my $result;
860: $result .= ' <axis ';
861: foreach my $attr (%axis_defaults) {
862: $result .= ' '.$attr.' "'.$axis_defaults{$attr}->{'default'}.
863: "\"\n";
864: }
865: $result .= " />\n";
866: return $result;
867: }
868:
869: sub insert_label {
870: my $result;
871: $result .= ' <label ';
872: foreach my $attr (%label_defaults) {
873: $result .= ' '.$attr.' "'.
874: $label_defaults{$attr}->{'default'}."\"\n";
875: }
876: $result .= " ></label>\n";
877: return $result;
878: }
879:
880: sub insert_curve {
881: my $result;
882: $result .= ' <curve ';
883: foreach my $attr (%curve_defaults) {
884: $result .= ' '.$attr.' "'.
885: $curve_defaults{$attr}->{'default'}."\"\n";
886: }
887: $result .= " >\n";
888: }
1.4 matthew 889:
1.20 matthew 890: sub insert_function {
891: my $result;
892: $result .= "<function></function>\n";
893: return $result;
894: }
1.4 matthew 895:
1.20 matthew 896: sub insert_data {
897: my $result;
898: $result .= " <data></data>\n";
899: $result .= " <data></data>\n";
900: return $result;
901: }
1.4 matthew 902:
1.21 matthew 903: ##----------------------------------------------------------------------
1.20 matthew 904: 1;
905: __END__
1.4 matthew 906:
907:
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