1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.27 2001/12/31 17:30:09 matthew Exp $
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: # 12/15/01 Matthew
29: # 12/17 12/18 12/19 12/20 12/21 12/27 12/28 12/30 Matthew
30: package Apache::lonplot;
31:
32: use strict;
33: use Apache::File;
34: use Apache::response;
35: use Apache::lonxml;
36: use Apache::edit;
37:
38: sub BEGIN {
39: &Apache::lonxml::register('Apache::lonplot',('plot'));
40: }
41:
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
55: ## align
56: ##
57: ## @labels: $labels[$i] = \%label
58: ## %label: text, xpos, ypos, justify
59: ##
60: ## @curves: $curves[$i] = \%curve
61: ## %curve: name, linestyle, ( function | data )
62: ##
63: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
64: ## [y1,y2,y3,y4] ]
65: ##
66:
67: ###################################################################
68: ## ##
69: ## Tests used in checking the validitity of input ##
70: ## ##
71: ###################################################################
72: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
73: my $real_test =
74: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
75: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-f]{6}$/};
76: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
77: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
78: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
79: my $linestyle_test = sub {$_[0]=~/^(lines|linespoints|dots|points|steps)$/};
80: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w\(\)]+ ?)+$/};
81:
82: ###################################################################
83: ## ##
84: ## Attribute metadata ##
85: ## ##
86: ###################################################################
87: my %plot_defaults =
88: (
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: }
145: );
146:
147: my %key_defaults =
148: (
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: }
169: );
170:
171: my %label_defaults =
172: (
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: }
192: );
193:
194: my %axis_defaults =
195: (
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: }
233: );
234:
235: my %curve_defaults =
236: (
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 => $linestyle_test,
252: description => 'Style of the axis lines',
253: edit_type => 'choice',
254: choices => ['lines','linespoints','dots','points','steps']
255: }
256: );
257:
258: ###################################################################
259: ## ##
260: ## parsing and edit rendering ##
261: ## ##
262: ###################################################################
263: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves);
264:
265: sub start_plot {
266: %plot = (); %key = (); %axis = ();
267: $title = undef; $xlabel = undef; $ylabel = undef;
268: $#labels = -1; $#curves = -1;
269: #
270: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
271: my $result='';
272: &Apache::lonxml::register('Apache::lonplot',
273: ('title','xlabel','ylabel','key','axis','label','curve'));
274: push (@Apache::lonxml::namespace,'plot');
275: my $inside = &Apache::lonxml::get_all_text("/plot",$$parser[-1]);
276: if ($target eq 'web') {
277: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
278: }
279: &Apache::lonxml::newparser($parser,\$inside);
280: if ($target eq 'web') {
281: &get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval,
282: $tagstack->[-1]);
283: } elsif ($target eq 'edit') {
284: $result .= &Apache::edit::tag_start($target,$token,'Plot');
285: $result .= &edit_attributes($target,$token,\%plot_defaults);
286: } elsif ($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: }
293: }
294: return $result;
295: }
296:
297: sub end_plot {
298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
299:
300: pop @Apache::lonxml::namespace;
301: &Apache::lonxml::deregister('Apache::lonplot',
302: ('title','xlabel','ylabel','key','axis','label','curve'));
303: my $result = '';
304: if ($target eq 'web') {
305: &check_inputs(); # Make sure we have all the data we need
306: ##
307: ## Determine filename
308: my $tmpdir = '/home/httpd/perl/tmp/';
309: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
310: '_'.time.'_'.$$.'_plot.data';
311: ## Write the plot description to the file
312: my $fh=Apache::File->new(">$tmpdir$filename");
313: print $fh &write_gnuplot_file();
314: close($fh);
315: ## return image tag for the plot
316: $result .= <<"ENDIMAGE";
317: <img src = "/cgi-bin/plot.gif?$filename"
318: width = "$plot{'width'}"
319: height = "$plot{'height'}"
320: align = "$plot{'align'}"
321: alt = "/cgi-bin/plot.gif?$filename" />
322: ENDIMAGE
323: } elsif ($target eq 'edit') {
324: $result.=&Apache::edit::tag_end($target,$token);
325: }
326: return $result;
327: }
328:
329: ##----------------------------------------------------------------- key
330: sub start_key {
331: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
332: my $result='';
333: if ($target eq 'web') {
334: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
335: $tagstack->[-1]);
336: } elsif ($target eq 'edit') {
337: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
338: $result .= &edit_attributes($target,$token,\%key_defaults);
339: } elsif ($target eq 'modified') {
340: my $constructtag=&Apache::edit::get_new_args
341: ($token,$parstack,$safeeval,keys(%key_defaults));
342: if ($constructtag) {
343: $result = &Apache::edit::rebuild_tag($token);
344: $result.= &Apache::edit::handle_insert();
345: }
346: }
347: return $result;
348: }
349:
350: sub end_key {
351: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
352: my $result = '';
353: if ($target eq 'web') {
354: } elsif ($target eq 'edit') {
355: $result.=&Apache::edit::tag_end($target,$token);
356: }
357: return $result;
358: }
359:
360: ##------------------------------------------------------------------- title
361: sub start_title {
362: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
363: my $result='';
364: if ($target eq 'web') {
365: $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
366: } elsif ($target eq 'edit') {
367: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
368: my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]);
369: $result.='</td></tr><tr><td colspan="3">'.
370: &Apache::edit::editfield('',$text,'',20,1);
371: } elsif ($target eq 'modified') {
372: my $text=$$parser[-1]->get_text("/function");
373: $result.=&Apache::edit::modifiedfield($token);
374: }
375: return $result;
376: }
377:
378: sub end_title {
379: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
380: my $result = '';
381: if ($target eq 'web') {
382: } elsif ($target eq 'edit') {
383: $result.=&Apache::edit::tag_end($target,$token);
384: }
385: return $result;
386: }
387: ##------------------------------------------------------------------- xlabel
388: sub start_xlabel {
389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
390: my $result='';
391: if ($target eq 'web') {
392: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
393: } elsif ($target eq 'edit') {
394: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
395: my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
396: $result.='</td></tr><tr><td colspan="3">'.
397: &Apache::edit::editfield('',$text,'',20,1);
398: } elsif ($target eq 'modified') {
399: my $text=$$parser[-1]->get_text("/function");
400: $result.=&Apache::edit::modifiedfield($token);
401: }
402: return $result;
403: }
404:
405: sub end_xlabel {
406: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
407: my $result = '';
408: if ($target eq 'web') {
409: } elsif ($target eq 'edit') {
410: $result.=&Apache::edit::tag_end($target,$token);
411: }
412: return $result;
413: }
414:
415: ##------------------------------------------------------------------- ylabel
416: sub start_ylabel {
417: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
418: my $result='';
419: if ($target eq 'web') {
420: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
421: } elsif ($target eq 'edit') {
422: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
423: my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
424: $result .= '</td></tr><tr><td colspan="3">'.
425: &Apache::edit::editfield('',$text,'',20,1);
426: } elsif ($target eq 'modified') {
427: my $text=$$parser[-1]->get_text("/function");
428: $result.=&Apache::edit::modifiedfield($token);
429: }
430: return $result;
431: }
432:
433: sub end_ylabel {
434: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
435: my $result = '';
436: if ($target eq 'web') {
437: } elsif ($target eq 'edit') {
438: $result.=&Apache::edit::tag_end($target,$token);
439: }
440: return $result;
441: }
442:
443: ##------------------------------------------------------------------- label
444: sub start_label {
445: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
446: my $result='';
447: if ($target eq 'web') {
448: my %label;
449: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
450: $tagstack->[-1]);
451: $label{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
452: if (! &$words_test($label{'text'})) {
453: # I should probably warn about it, too.
454: $label{'text'} = 'Illegal text';
455: }
456: push(@labels,\%label);
457: } elsif ($target eq 'edit') {
458: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
459: $result .= &edit_attributes($target,$token,\%label_defaults);
460: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
461: $result .= '</td></tr><tr><td colspan="3">'.
462: &Apache::edit::editfield('',$text,'',20,1);
463: } elsif ($target eq 'modified') {
464: my $constructtag=&Apache::edit::get_new_args
465: ($token,$parstack,$safeeval,keys(%label_defaults));
466: if ($constructtag) {
467: $result = &Apache::edit::rebuild_tag($token);
468: $result.= &Apache::edit::handle_insert();
469: }
470: my $text=$$parser[-1]->get_text("/label");
471: $result.=&Apache::edit::modifiedfield($token);
472: }
473: return $result;
474: }
475:
476: sub end_label {
477: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
478: my $result = '';
479: if ($target eq 'web') {
480: } elsif ($target eq 'edit') {
481: $result.=&Apache::edit::tag_end($target,$token);
482: }
483: return $result;
484: }
485:
486: ##------------------------------------------------------------------- curve
487: sub start_curve {
488: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
489: my $result='';
490: &Apache::lonxml::register('Apache::lonplot',('function','data'));
491: push (@Apache::lonxml::namespace,'curve');
492: if ($target eq 'web') {
493: my %curve;
494: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
495: $tagstack->[-1]);
496: push (@curves,\%curve);
497: } elsif ($target eq 'edit') {
498: $result .= &Apache::edit::tag_start($target,$token,'Curve');
499: $result .= &edit_attributes($target,$token,\%curve_defaults);
500: } elsif ($target eq 'modified') {
501: my $constructtag=&Apache::edit::get_new_args
502: ($token,$parstack,$safeeval,keys(%label_defaults));
503: if ($constructtag) {
504: $result = &Apache::edit::rebuild_tag($token);
505: $result.= &Apache::edit::handle_insert();
506: }
507: }
508: return $result;
509: }
510:
511: sub end_curve {
512: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
513: my $result = '';
514: pop @Apache::lonxml::namespace;
515: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
516: if ($target eq 'web') {
517: } elsif ($target eq 'edit') {
518: $result.=&Apache::edit::tag_end($target,$token);
519: }
520: return $result;
521: }
522:
523: ##------------------------------------------------------------ curve function
524: sub start_function {
525: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
526: my $result='';
527: if ($target eq 'web') {
528: if (exists($curves[-1]->{'data'})) {
529: &Apache::lonxml::warning('Use of <function> precludes use of <data>. The <data> will be omitted in favor of the <function> declaration.');
530: delete $curves[-1]->{'data'} ;
531: }
532: $curves[-1]->{'function'} =
533: &Apache::lonxml::get_all_text("/function",$$parser[-1]);
534: } elsif ($target eq 'edit') {
535: $result .= &Apache::edit::tag_start($target,$token,'Curve Function');
536: my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
537: $result .= '</td></tr><tr><td colspan="3">'.
538: &Apache::edit::editfield('',$text,'',20,1);
539: } elsif ($target eq 'modified') {
540: # Why do I do this?
541: my $text=$$parser[-1]->get_text("/function");
542: $result.=&Apache::edit::modifiedfield($token);
543: }
544: return $result;
545: }
546:
547: sub end_function {
548: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
549: my $result = '';
550: if ($target eq 'web') {
551: } elsif ($target eq 'edit') {
552: $result .= &Apache::edit::end_table();
553: }
554: return $result;
555: }
556:
557: ##------------------------------------------------------------ curve data
558: sub start_data {
559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
560: my $result='';
561: if ($target eq 'web') {
562: if (exists($curves[-1]->{'function'})) {
563: &Apache::lonxml::warning('Use of <data> precludes use of .'.
564: '<function>. The <function> will be omitted in favor of '.
565: 'the <data> declaration.');
566: delete($curves[-1]->{'function'});
567: }
568: my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
569: $datatext =~ s/\s+/ /g;
570: # Need to do some error checking on the @data array -
571: # make sure it's all numbers and make sure each array
572: # is of the same length.
573: my @data;
574: if ($datatext =~ /,/) {
575: @data = split /,/,$datatext;
576: } else { # Assume it's space seperated.
577: @data = split / /,$datatext;
578: }
579: for (my $i=0;$i<=$#data;$i++) {
580: # Check that it's non-empty
581: if (! defined($data[$i])) {
582: &Apache::lonxml::warning(
583: 'undefined <data> value. Replacing with '.
584: ' pi/e = 1.15572734979092');
585: $data[$i] = 1.15572734979092;
586: }
587: # Check that it's a number
588: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
589: &Apache::lonxml::warning(
590: 'Bad <data> value of '.$data[$i].' Replacing with '.
591: ' pi/e = 1.15572734979092');
592: $data[$i] = 1.15572734979092;
593: }
594: }
595: push @{$curves[-1]->{'data'}},\@data;
596: } elsif ($target eq 'edit') {
597: $result .= &Apache::edit::tag_start($target,$token,'Curve Data');
598: my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
599: $result .= '</td></tr><tr><td colspan="3">'.
600: &Apache::edit::editfield('',$text,'',20,1);
601: } elsif ($target eq 'modified') {
602: my $text=$$parser[-1]->get_text("/data");
603: $result.=&Apache::edit::modifiedfield($token);
604: }
605: return $result;
606: }
607:
608: sub end_data {
609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
610: my $result = '';
611: if ($target eq 'web') {
612: } elsif ($target eq 'edit') {
613: $result .= &Apache::edit::end_table();
614: }
615: return $result;
616: }
617:
618: ##------------------------------------------------------------------- axis
619: sub start_axis {
620: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
621: my $result='';
622: if ($target eq 'web') {
623: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
624: $tagstack->[-1]);
625: } elsif ($target eq 'edit') {
626: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
627: $result .= &edit_attributes($target,$token,\%axis_defaults);
628: } elsif ($target eq 'modified') {
629: }
630: return $result;
631: }
632:
633: sub end_axis {
634: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
635: my $result = '';
636: if ($target eq 'web') {
637: } elsif ($target eq 'edit') {
638: $result.=&Apache::edit::tag_end($target,$token);
639: } elsif ($target eq 'modified') {
640: my $constructtag=&Apache::edit::get_new_args
641: ($token,$parstack,$safeeval,keys(%axis_defaults));
642: if ($constructtag) {
643: $result = &Apache::edit::rebuild_tag($token);
644: $result.= &Apache::edit::handle_insert();
645: }
646: }
647: return $result;
648: }
649:
650: ###################################################################
651: ## ##
652: ## Utility Functions ##
653: ## ##
654: ###################################################################
655:
656: ##----------------------------------------------------------- set_defaults
657: sub set_defaults {
658: my ($var,$defaults) = @_;
659: my $key;
660: foreach $key (keys(%$defaults)) {
661: $var->{$key} = $defaults->{$key}->{'default'};
662: }
663: }
664:
665: ##------------------------------------------------------------------- misc
666: sub get_attributes{
667: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
668: foreach my $attr (keys(%{$defaults})) {
669: $values->{$attr} =
670: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
671: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
672: $values->{$attr} = $defaults->{$attr}->{'default'};
673: next;
674: }
675: my $test = $defaults->{$attr}->{'test'};
676: if (! &$test($values->{$attr})) {
677: &Apache::lonxml::warning
678: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
679: .$defaults->{$attr}->{'default'} );
680: $values->{$attr} = $defaults->{$attr}->{'default'};
681: }
682: }
683: return ;
684: }
685: ##------------------------------------------------------- write_gnuplot_file
686: sub write_gnuplot_file {
687: my $gnuplot_input = '';
688: my $curve;
689: # Collect all the colors
690: my @Colors;
691: push @Colors, $plot{'bgcolor'};
692: push @Colors, $plot{'fgcolor'};
693: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
694: foreach $curve (@curves) {
695: push @Colors, ($curve->{'color'} ne '' ?
696: $curve->{'color'} :
697: $plot{'fgcolor'} );
698: }
699: # set term
700: $gnuplot_input .= 'set term gif ';
701: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
702: $gnuplot_input .= $plot{'font'} . ' ';
703: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
704: $gnuplot_input .= "@Colors\n";
705: # grid
706: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
707: # border
708: $gnuplot_input .= ($plot{'border'} eq 'on'?
709: 'set border'.$/ :
710: 'set noborder'.$/ ); # title, xlabel, ylabel
711: $gnuplot_input .= "set output\n";
712: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
713: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
714: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
715: if (%axis) {
716: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
717: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
718: }
719: # Key
720: if (%key) {
721: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
722: if ($key{'title'} ne '') {
723: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
724: }
725: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
726: } else {
727: $gnuplot_input .= 'set nokey'.$/;
728: }
729: # labels
730: my $label;
731: foreach $label (@labels) {
732: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
733: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
734: }
735: # curves
736: $gnuplot_input .= 'plot ';
737: my $datatext = '';
738: for (my $i = 0;$i<=$#curves;$i++) {
739: $curve = $curves[$i];
740: $gnuplot_input.= ', ' if ($i > 0);
741: if (exists($curve->{'function'})) {
742: $gnuplot_input.=
743: $curve->{'function'}.' title "'.
744: $curve->{'name'}.'" with '.
745: $curve->{'linestyle'};
746: } elsif (exists($curve->{'data'})) {
747: $gnuplot_input.= '\'-\' title "'.
748: $curve->{'name'}.'" with '.
749: $curve->{'linestyle'};
750: my @Data = @{$curve->{'data'}};
751: my @Data0 = @{$Data[0]};
752: for (my $i =0; $i<=$#Data0; $i++) {
753: my $dataset;
754: foreach $dataset (@Data) {
755: $datatext .= $dataset->[$i] . ' ';
756: }
757: $datatext .= $/;
758: }
759: $datatext .=$/;
760: }
761: }
762: $gnuplot_input .= $/.$datatext;
763: return $gnuplot_input;
764: }
765:
766: #---------------------------------------------- check_inputs
767: sub check_inputs {
768: ## Note: no inputs, no outputs - this acts only on global variables.
769: ## Make sure we have all the input we need:
770: if (! %plot) { &set_defaults(\%plot,\%plot_defaults); }
771: if (! %key ) {} # No key for this plot, thats okay
772: if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
773: if (! defined($title )) {} # No title for this plot, thats okay
774: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
775: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
776: if ($#labels < 0) { } # No labels for this plot, thats okay
777: if ($#curves < 0) {
778: &Apache::lonxml::warning("No curves specified for plot!!!!");
779: return '';
780: }
781: my $curve;
782: foreach $curve (@curves) {
783: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
784: &Apache::lonxml::warning("One of the curves specified did not contain any <data> or <function> declarations\n");
785: return '';
786: }
787: }
788: }
789:
790: #------------------------------------------------ make_edit
791: sub edit_attributes {
792: my ($target,$token,$defaults) = @_;
793: my $result;
794: foreach my $attr (sort keys(%$defaults)) {
795: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
796: $result .= &Apache::edit::text_arg(
797: $defaults->{$attr}->{'description'},
798: $attr,
799: $token);
800: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
801: $result .= &Apache::edit::select_arg(
802: $defaults->{$attr}->{'description'},
803: $attr,
804: $defaults->{$attr}->{'choices'},
805: $token);
806: }
807: $result .= '<br />';
808: }
809: return $result;
810: }
811:
812:
813: ###################################################################
814: ## ##
815: ## Insertion functions for editing plots ##
816: ## ##
817: ###################################################################
818:
819: #------------------------------------------------ insert_xxxxxxx
820: sub insert_plot {
821: my $result;
822: # plot attributes
823: $result .= '<plot ';
824: foreach my $attr (%plot_defaults) {
825: $result .= ' '.$attr.'="'.$plot_defaults{$attr}->{'default'}.
826: "\"\n";
827: }
828: $result .= ">\n";
829: # Add the components
830: $result .= &insert_key();
831: $result .= &insert_axis();
832: $result .= &insert_label();
833: $result .= &insert_curve();
834: $result .= &insert_function();
835: $result .= "</curve>\n";
836: $result .= &insert_curve();
837: $result .= &insert_data();
838: $result .= "</curve>\n";
839: # close up the <plot>
840: $result .= "</plot>\n";
841: return $result;
842: }
843:
844: sub insert_key {
845: my $result;
846: $result .= ' <key ';
847: foreach my $attr (%key_defaults) {
848: $result .= ' '.$attr.'="'.$key_defaults{$attr}->{'default'}.
849: "\"\n";
850: }
851: $result .= " />\n";
852: return $result;
853: }
854:
855: sub insert_axis{
856: my $result;
857: $result .= ' <axis ';
858: foreach my $attr (%axis_defaults) {
859: $result .= ' '.$attr.'="'.$axis_defaults{$attr}->{'default'}.
860: "\"\n";
861: }
862: $result .= " />\n";
863: return $result;
864: }
865:
866: sub insert_label {
867: my $result;
868: $result .= ' <label ';
869: foreach my $attr (%label_defaults) {
870: $result .= ' '.$attr.'="'.
871: $label_defaults{$attr}->{'default'}."\"\n";
872: }
873: $result .= " ></label>\n";
874: return $result;
875: }
876:
877: sub insert_curve {
878: my $result;
879: $result .= ' <curve ';
880: foreach my $attr (%curve_defaults) {
881: $result .= ' '.$attr.'="'.
882: $curve_defaults{$attr}->{'default'}."\"\n";
883: }
884: $result .= " >\n";
885: }
886:
887: sub insert_function {
888: my $result;
889: $result .= "<function></function>\n";
890: return $result;
891: }
892:
893: sub insert_data {
894: my $result;
895: $result .= " <data></data>\n";
896: $result .= " <data></data>\n";
897: return $result;
898: }
899:
900: ##----------------------------------------------------------------------
901: 1;
902: __END__
903:
904:
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