1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.109 2005/06/07 22:30:42 foxr 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:
29: package Apache::lonplot;
30:
31: use strict;
32: use warnings FATAL=>'all';
33: no warnings 'uninitialized';
34: use Apache::File;
35: use Apache::response;
36: use Apache::lonxml;
37: use Apache::edit;
38: use Apache::lonnet;
39:
40: use vars qw/$weboutputformat $versionstring/;
41:
42:
43:
44: BEGIN {
45: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
46: #
47: # Determine the version of GNUPLOT
48: $weboutputformat = 'gif';
49: $versionstring = `gnuplot --version 2>/dev/null`;
50: if ($versionstring =~ /^gnuplot 4/) {
51: $weboutputformat = 'png';
52: }
53:
54: }
55:
56:
57: ##
58: ## Description of data structures:
59: ##
60: ## %plot %key %axis
61: ## --------------------------
62: ## height title color
63: ## width box xmin
64: ## bgcolor pos xmax
65: ## fgcolor ymin
66: ## transparent ymax
67: ## grid
68: ## border
69: ## font
70: ## align
71: ##
72: ## @labels: $labels[$i] = \%label
73: ## %label: text, xpos, ypos, justify
74: ##
75: ## @curves: $curves[$i] = \%curve
76: ## %curve: name, linestyle, ( function | data )
77: ##
78: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
79: ## [y1,y2,y3,y4] ]
80: ##
81:
82: ###################################################################
83: ## ##
84: ## Tests used in checking the validitity of input ##
85: ## ##
86: ###################################################################
87:
88: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
89: # is longer than this, it will be truncated.
90:
91: my %linestyles =
92: (
93: lines => 2, # Maybe this will be used in the future
94: linespoints => 2, # to check on whether or not they have
95: dots => 2, # supplied enough <data></data> fields
96: points => 2, # to use the given line style. But for
97: steps => 2, # now there are more important things
98: fsteps => 2, # for me to deal with.
99: histeps => 2,
100: errorbars => 3,
101: xerrorbars => [3,4],
102: yerrorbars => [3,4],
103: xyerrorbars => [4,6],
104: boxes => 3,
105: vector => 4
106: );
107:
108: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
109: my $real_test =
110: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
111: my $pos_real_test =
112: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
113: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
114: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
115: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
116: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
117: my $linestyle_test = sub {exists($linestyles{$_[0]})};
118: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
119:
120: ###################################################################
121: ## ##
122: ## Attribute metadata ##
123: ## ##
124: ###################################################################
125: my @gnuplot_edit_order =
126: qw/alttag bgcolor fgcolor height width font transparent grid samples
127: border align texwidth texfont plotcolor plottype lmargin rmargin tmargin
128: bmargin major_ticscale minor_ticscale/;
129:
130: my $margin_choices = ['default',0..20];
131:
132: my %gnuplot_defaults =
133: (
134: alttag => {
135: default => 'dynamically generated plot',
136: test => $words_test,
137: description => 'brief description of the plot',
138: edit_type => 'entry',
139: size => '40'
140: },
141: height => {
142: default => 300,
143: test => $int_test,
144: description => 'height of image (pixels)',
145: edit_type => 'entry',
146: size => '10'
147: },
148: width => {
149: default => 400,
150: test => $int_test,
151: description => 'width of image (pixels)',
152: edit_type => 'entry',
153: size => '10'
154: },
155: bgcolor => {
156: default => 'xffffff',
157: test => $color_test,
158: description => 'background color of image (xffffff)',
159: edit_type => 'entry',
160: size => '10'
161: },
162: fgcolor => {
163: default => 'x000000',
164: test => $color_test,
165: description => 'foreground color of image (x000000)',
166: edit_type => 'entry',
167: size => '10'
168: },
169: transparent => {
170: default => 'off',
171: test => $onoff_test,
172: description => 'Transparent image',
173: edit_type => 'onoff'
174: },
175: grid => {
176: default => 'on',
177: test => $onoff_test,
178: description => 'Display grid',
179: edit_type => 'onoff'
180: },
181: border => {
182: default => 'on',
183: test => $onoff_test,
184: description => 'Draw border around plot',
185: edit_type => 'onoff'
186: },
187: font => {
188: default => 'medium',
189: test => $sml_test,
190: description => 'Size of font to use',
191: edit_type => 'choice',
192: choices => ['small','medium','large']
193: },
194: samples => {
195: default => '100',
196: test => $int_test,
197: description => 'Number of samples for non-data plots',
198: edit_type => 'choice',
199: choices => ['100','200','500','1000','2000','5000']
200: },
201: align => {
202: default => 'center',
203: test => sub {$_[0]=~/^(left|right|center)$/},
204: description => 'alignment for image in html',
205: edit_type => 'choice',
206: choices => ['left','right','center']
207: },
208: texwidth => {
209: default => '93',
210: test => $int_test,
211: description => 'Width of plot when printed (mm)',
212: edit_type => 'entry',
213: size => '5'
214: },
215: texfont => {
216: default => '22',
217: test => $int_test,
218: description => 'Font size to use in TeX output (pts):',
219: edit_type => 'choice',
220: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
221: },
222: plotcolor => {
223: default => 'monochrome',
224: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
225: description => 'Color setting for printing:',
226: edit_type => 'choice',
227: choices => [qw/monochrome color colour/],
228: },
229: plottype => {
230: default => 'Cartesian',
231: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
232: description => 'Plot type:',
233: edit_type => 'choice',
234: choices => ['Cartesian','Polar']
235: },
236: lmargin => {
237: default => 'default',
238: test => sub {$_[0]=~/^(default|\d+)$/},
239: description => 'Left margin width (pts):',
240: edit_type => 'choice',
241: choices => $margin_choices,
242: },
243: rmargin => {
244: default => 'default',
245: test => sub {$_[0]=~/^(default|\d+)$/},
246: description => 'Right margin width (pts):',
247: edit_type => 'choice',
248: choices => $margin_choices,
249: },
250: tmargin => {
251: default => 'default',
252: test => sub {$_[0]=~/^(default|\d+)$/},
253: description => 'Top margin width (pts):',
254: edit_type => 'choice',
255: choices => $margin_choices,
256: },
257: bmargin => {
258: default => 'default',
259: test => sub {$_[0]=~/^(default|\d+)$/},
260: description => 'Bottom margin width (pts):',
261: edit_type => 'choice',
262: choices => $margin_choices,
263: },
264: major_ticscale => {
265: default => '1',
266: test => $real_test,
267: description => 'Size of major tic marks (plot coordinates)',
268: edit_type => 'entry',
269: size => '5'
270: },
271: minor_ticscale => {
272: default => '0.5',
273: test => $real_test,
274: description => 'Size of minor tic mark (plot coordinates)',
275: edit_type => 'entry',
276: size => '5'
277: },
278: );
279:
280: my %key_defaults =
281: (
282: title => {
283: default => '',
284: test => $words_test,
285: description => 'Title of key',
286: edit_type => 'entry',
287: size => '40'
288: },
289: box => {
290: default => 'off',
291: test => $onoff_test,
292: description => 'Draw a box around the key?',
293: edit_type => 'onoff'
294: },
295: pos => {
296: default => 'top right',
297: test => $key_pos_test,
298: description => 'position of the key on the plot',
299: edit_type => 'choice',
300: choices => ['top left','top right','bottom left','bottom right',
301: 'outside','below']
302: }
303: );
304:
305: my %label_defaults =
306: (
307: xpos => {
308: default => 0,
309: test => $real_test,
310: description => 'x position of label (graph coordinates)',
311: edit_type => 'entry',
312: size => '10'
313: },
314: ypos => {
315: default => 0,
316: test => $real_test,
317: description => 'y position of label (graph coordinates)',
318: edit_type => 'entry',
319: size => '10'
320: },
321: justify => {
322: default => 'left',
323: test => sub {$_[0]=~/^(left|right|center)$/},
324: description => 'justification of the label text on the plot',
325: edit_type => 'choice',
326: choices => ['left','right','center']
327: }
328: );
329:
330: my @tic_edit_order = ('location','mirror','start','increment','end',
331: 'minorfreq');
332: my %tic_defaults =
333: (
334: location => {
335: default => 'border',
336: test => sub {$_[0]=~/^(border|axis)$/},
337: description => 'Location of major tic marks',
338: edit_type => 'choice',
339: choices => ['border','axis']
340: },
341: mirror => {
342: default => 'on',
343: test => $onoff_test,
344: description => 'mirror tics on opposite axis?',
345: edit_type => 'onoff'
346: },
347: start => {
348: default => '-10.0',
349: test => $real_test,
350: description => 'Start major tics at',
351: edit_type => 'entry',
352: size => '10'
353: },
354: increment => {
355: default => '1.0',
356: test => $real_test,
357: description => 'Place a major tic every',
358: edit_type => 'entry',
359: size => '10'
360: },
361: end => {
362: default => ' 10.0',
363: test => $real_test,
364: description => 'Stop major tics at ',
365: edit_type => 'entry',
366: size => '10'
367: },
368: minorfreq => {
369: default => '0',
370: test => $int_test,
371: description => 'Number of minor tics per major tic mark',
372: edit_type => 'entry',
373: size => '10'
374: },
375: );
376:
377: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
378: my %axis_defaults =
379: (
380: color => {
381: default => 'x000000',
382: test => $color_test,
383: description => 'color of grid lines (x000000)',
384: edit_type => 'entry',
385: size => '10'
386: },
387: xmin => {
388: default => '-10.0',
389: test => $real_test,
390: description => 'minimum x-value shown in plot',
391: edit_type => 'entry',
392: size => '10'
393: },
394: xmax => {
395: default => ' 10.0',
396: test => $real_test,
397: description => 'maximum x-value shown in plot',
398: edit_type => 'entry',
399: size => '10'
400: },
401: ymin => {
402: default => '-10.0',
403: test => $real_test,
404: description => 'minimum y-value shown in plot',
405: edit_type => 'entry',
406: size => '10'
407: },
408: ymax => {
409: default => ' 10.0',
410: test => $real_test,
411: description => 'maximum y-value shown in plot',
412: edit_type => 'entry',
413: size => '10'
414: }
415: );
416:
417: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
418:
419: my %curve_defaults =
420: (
421: color => {
422: default => 'x000000',
423: test => $color_test,
424: description => 'color of curve (x000000)',
425: edit_type => 'entry',
426: size => '10'
427: },
428: name => {
429: default => '',
430: test => $words_test,
431: description => 'name of curve to appear in key',
432: edit_type => 'entry',
433: size => '20'
434: },
435: linestyle => {
436: default => 'lines',
437: test => $linestyle_test,
438: description => 'Line style',
439: edit_type => 'choice',
440: choices => [keys(%linestyles)]
441: },
442: # gnuplots term=gif driver does not handle linewidth :(
443: # linewidth => {
444: # default => 1,
445: # test => $int_test,
446: # description => 'Line width (may not apply to all line styles)',
447: # edit_type => 'choice',
448: # choices => [1,2,3,4,5,6,7,8,9,10]
449: # },
450: pointsize => {
451: default => 1,
452: test => $pos_real_test,
453: description => 'point size (may not apply to all line styles)',
454: edit_type => 'entry',
455: size => '5'
456: },
457: pointtype => {
458: default => 1,
459: test => $int_test,
460: description => 'point type (may not apply to all line styles)',
461: edit_type => 'choice',
462: choices => [0,1,2,3,4,5,6]
463: }
464: );
465:
466: ###################################################################
467: ## ##
468: ## parsing and edit rendering ##
469: ## ##
470: ###################################################################
471:
472: undef %Apache::lonplot::plot;
473: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
474:
475: sub start_gnuplot {
476: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
477: undef($title); undef($xlabel); undef($ylabel);
478: undef(@labels); undef(@curves);
479: undef(%xtics); undef(%ytics);
480: #
481: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
482: my $result='';
483: &Apache::lonxml::register('Apache::lonplot',
484: ('title','xlabel','ylabel','key','axis','label','curve',
485: 'xtics','ytics'));
486: push (@Apache::lonxml::namespace,'lonplot');
487: if ($target eq 'web' || $target eq 'tex') {
488: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
489: $tagstack->[-1]);
490: } elsif ($target eq 'edit') {
491: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
492: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
493: \@gnuplot_edit_order);
494: } elsif ($target eq 'modified') {
495: my $constructtag=&Apache::edit::get_new_args
496: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
497: if ($constructtag) {
498: $result = &Apache::edit::rebuild_tag($token);
499: }
500: }
501: return $result;
502: }
503:
504: sub end_gnuplot {
505: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
506: pop @Apache::lonxml::namespace;
507: &Apache::lonxml::deregister('Apache::lonplot',
508: ('title','xlabel','ylabel','key','axis','label','curve'));
509: my $result = '';
510: my $randnumber;
511: # need to call rand everytime start_script would evaluate, as the
512: # safe space rand number generator and the global rand generator
513: # are not separate
514: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
515: $target eq 'answer') {
516: $randnumber=int(rand(1000));
517: }
518: if ($target eq 'web' || $target eq 'tex') {
519: &check_inputs(); # Make sure we have all the data we need
520: ##
521: ## Determine filename
522: my $tmpdir = '/home/httpd/perl/tmp/';
523: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
524: '_'.time.'_'.$$.$randnumber.'_plot';
525: ## Write the plot description to the file
526: &write_gnuplot_file($tmpdir,$filename,$target);
527: $filename = &Apache::lonnet::escape($filename);
528: ## return image tag for the plot
529: if ($target eq 'web') {
530: $result .= <<"ENDIMAGE";
531: <img src = "/cgi-bin/plot.gif?file=$filename.data&output=$weboutputformat"
532: width = "$Apache::lonplot::plot{'width'}"
533: height = "$Apache::lonplot::plot{'height'}"
534: align = "$Apache::lonplot::plot{'align'}"
535: alt = "$Apache::lonplot::plot{'alttag'}" />
536: ENDIMAGE
537: } elsif ($target eq 'tex') {
538: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
539: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
540: #might be inside the safe space, register the URL for later
541: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
542: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'} \n";
543: $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
544: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.eps}';
545: }
546: } elsif ($target eq 'edit') {
547: $result.=&Apache::edit::tag_end($target,$token);
548: }
549: return $result;
550: }
551:
552:
553: ##--------------------------------------------------------------- xtics
554: sub start_xtics {
555: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
556: my $result='';
557: if ($target eq 'web' || $target eq 'tex') {
558: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
559: $tagstack->[-1]);
560: } elsif ($target eq 'edit') {
561: $result .= &Apache::edit::tag_start($target,$token,'xtics');
562: $result .= &edit_attributes($target,$token,\%tic_defaults,
563: \@tic_edit_order);
564: } elsif ($target eq 'modified') {
565: my $constructtag=&Apache::edit::get_new_args
566: ($token,$parstack,$safeeval,keys(%tic_defaults));
567: if ($constructtag) {
568: $result = &Apache::edit::rebuild_tag($token);
569: }
570: }
571: return $result;
572: }
573:
574: sub end_xtics {
575: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
576: my $result = '';
577: if ($target eq 'web' || $target eq 'tex') {
578: } elsif ($target eq 'edit') {
579: $result.=&Apache::edit::tag_end($target,$token);
580: }
581: return $result;
582: }
583:
584: ##--------------------------------------------------------------- ytics
585: sub start_ytics {
586: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
587: my $result='';
588: if ($target eq 'web' || $target eq 'tex') {
589: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
590: $tagstack->[-1]);
591: } elsif ($target eq 'edit') {
592: $result .= &Apache::edit::tag_start($target,$token,'ytics');
593: $result .= &edit_attributes($target,$token,\%tic_defaults,
594: \@tic_edit_order);
595: } elsif ($target eq 'modified') {
596: my $constructtag=&Apache::edit::get_new_args
597: ($token,$parstack,$safeeval,keys(%tic_defaults));
598: if ($constructtag) {
599: $result = &Apache::edit::rebuild_tag($token);
600: }
601: }
602: return $result;
603: }
604:
605: sub end_ytics {
606: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
607: my $result = '';
608: if ($target eq 'web' || $target eq 'tex') {
609: } elsif ($target eq 'edit') {
610: $result.=&Apache::edit::tag_end($target,$token);
611: }
612: return $result;
613: }
614:
615:
616: ##----------------------------------------------------------------- key
617: sub start_key {
618: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
619: my $result='';
620: if ($target eq 'web' || $target eq 'tex') {
621: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
622: $tagstack->[-1]);
623: } elsif ($target eq 'edit') {
624: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
625: $result .= &edit_attributes($target,$token,\%key_defaults);
626: } elsif ($target eq 'modified') {
627: my $constructtag=&Apache::edit::get_new_args
628: ($token,$parstack,$safeeval,keys(%key_defaults));
629: if ($constructtag) {
630: $result = &Apache::edit::rebuild_tag($token);
631: }
632: }
633: return $result;
634: }
635:
636: sub end_key {
637: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
638: my $result = '';
639: if ($target eq 'web' || $target eq 'tex') {
640: } elsif ($target eq 'edit') {
641: $result.=&Apache::edit::tag_end($target,$token);
642: }
643: return $result;
644: }
645:
646: ##------------------------------------------------------------------- title
647: sub start_title {
648: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
649: my $result='';
650: if ($target eq 'web' || $target eq 'tex') {
651: $title = &Apache::lonxml::get_all_text("/title",$parser);
652: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
653: $title =~ s/\n/ /g;
654: if (length($title) > $max_str_len) {
655: $title = substr($title,0,$max_str_len);
656: }
657: } elsif ($target eq 'edit') {
658: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
659: my $text=&Apache::lonxml::get_all_text("/title",$parser);
660: $result.=&Apache::edit::end_row().
661: &Apache::edit::start_spanning_row().
662: &Apache::edit::editline('',$text,'',60);
663: } elsif ($target eq 'modified') {
664: $result.=&Apache::edit::rebuild_tag($token);
665: $result.=&Apache::edit::modifiedfield("/title",$parser);
666: }
667: return $result;
668: }
669:
670: sub end_title {
671: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
672: my $result = '';
673: if ($target eq 'web' || $target eq 'tex') {
674: } elsif ($target eq 'edit') {
675: $result.=&Apache::edit::tag_end($target,$token);
676: }
677: return $result;
678: }
679: ##------------------------------------------------------------------- xlabel
680: sub start_xlabel {
681: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
682: my $result='';
683: if ($target eq 'web' || $target eq 'tex') {
684: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
685: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
686: $xlabel =~ s/\n/ /g;
687: if (length($xlabel) > $max_str_len) {
688: $xlabel = substr($xlabel,0,$max_str_len);
689: }
690: } elsif ($target eq 'edit') {
691: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
692: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
693: $result.=&Apache::edit::end_row().
694: &Apache::edit::start_spanning_row().
695: &Apache::edit::editline('',$text,'',60);
696: } elsif ($target eq 'modified') {
697: $result.=&Apache::edit::rebuild_tag($token);
698: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
699: }
700: return $result;
701: }
702:
703: sub end_xlabel {
704: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
705: my $result = '';
706: if ($target eq 'web' || $target eq 'tex') {
707: } elsif ($target eq 'edit') {
708: $result.=&Apache::edit::tag_end($target,$token);
709: }
710: return $result;
711: }
712:
713: ##------------------------------------------------------------------- ylabel
714: sub start_ylabel {
715: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
716: my $result='';
717: if ($target eq 'web' || $target eq 'tex') {
718: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
719: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
720: $ylabel =~ s/\n/ /g;
721: if (length($ylabel) > $max_str_len) {
722: $ylabel = substr($ylabel,0,$max_str_len);
723: }
724: } elsif ($target eq 'edit') {
725: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
726: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
727: $result .= &Apache::edit::end_row().
728: &Apache::edit::start_spanning_row().
729: &Apache::edit::editline('',$text,'',60);
730: } elsif ($target eq 'modified') {
731: $result.=&Apache::edit::rebuild_tag($token);
732: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
733: }
734: return $result;
735: }
736:
737: sub end_ylabel {
738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
739: my $result = '';
740: if ($target eq 'web' || $target eq 'tex') {
741: } elsif ($target eq 'edit') {
742: $result.=&Apache::edit::tag_end($target,$token);
743: }
744: return $result;
745: }
746:
747: ##------------------------------------------------------------------- label
748: sub start_label {
749: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
750: my $result='';
751: if ($target eq 'web' || $target eq 'tex') {
752: my %label;
753: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
754: $tagstack->[-1]);
755: my $text = &Apache::lonxml::get_all_text("/label",$parser);
756: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
757: $text =~ s/\n/ /g;
758: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
759: $label{'text'} = $text;
760: push(@labels,\%label);
761: } elsif ($target eq 'edit') {
762: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
763: $result .= &edit_attributes($target,$token,\%label_defaults);
764: my $text = &Apache::lonxml::get_all_text("/label",$parser);
765: $result .= &Apache::edit::end_row().
766: &Apache::edit::start_spanning_row().
767: &Apache::edit::editline('',$text,'',60);
768: } elsif ($target eq 'modified') {
769: &Apache::edit::get_new_args
770: ($token,$parstack,$safeeval,keys(%label_defaults));
771: $result.=&Apache::edit::rebuild_tag($token);
772: $result.=&Apache::edit::modifiedfield("/label",$parser);
773: }
774: return $result;
775: }
776:
777: sub end_label {
778: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
779: my $result = '';
780: if ($target eq 'web' || $target eq 'tex') {
781: } elsif ($target eq 'edit') {
782: $result.=&Apache::edit::tag_end($target,$token);
783: }
784: return $result;
785: }
786:
787: ##------------------------------------------------------------------- curve
788: sub start_curve {
789: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
790: my $result='';
791: &Apache::lonxml::register('Apache::lonplot',('function','data'));
792: push (@Apache::lonxml::namespace,'curve');
793: if ($target eq 'web' || $target eq 'tex') {
794: my %curve;
795: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
796: $tagstack->[-1]);
797: push (@curves,\%curve);
798: } elsif ($target eq 'edit') {
799: $result .= &Apache::edit::tag_start($target,$token,'Curve');
800: $result .= &edit_attributes($target,$token,\%curve_defaults,
801: \@curve_edit_order);
802: } elsif ($target eq 'modified') {
803: my $constructtag=&Apache::edit::get_new_args
804: ($token,$parstack,$safeeval,keys(%curve_defaults));
805: if ($constructtag) {
806: $result = &Apache::edit::rebuild_tag($token);
807: $result.= &Apache::edit::handle_insert();
808: }
809: }
810: return $result;
811: }
812:
813: sub end_curve {
814: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
815: my $result = '';
816: pop @Apache::lonxml::namespace;
817: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
818: if ($target eq 'web' || $target eq 'tex') {
819: } elsif ($target eq 'edit') {
820: $result.=&Apache::edit::tag_end($target,$token);
821: }
822: return $result;
823: }
824:
825: ##------------------------------------------------------------ curve function
826: sub start_function {
827: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
828: my $result='';
829: if ($target eq 'web' || $target eq 'tex') {
830: if (exists($curves[-1]->{'data'})) {
831: &Apache::lonxml::warning
832: ('Use of the <b>curve function</b> tag precludes use of '.
833: ' the <b>curve data</b> tag. '.
834: 'The curve data tag will be omitted in favor of the '.
835: 'curve function declaration.');
836: delete $curves[-1]->{'data'} ;
837: }
838: my $function = &Apache::lonxml::get_all_text("/function",$parser);
839: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
840: $curves[-1]->{'function'} = $function;
841: } elsif ($target eq 'edit') {
842: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
843: my $text = &Apache::lonxml::get_all_text("/function",$parser);
844: $result .= &Apache::edit::end_row().
845: &Apache::edit::start_spanning_row().
846: &Apache::edit::editline('',$text,'',60);
847: } elsif ($target eq 'modified') {
848: $result.=&Apache::edit::rebuild_tag($token);
849: $result.=&Apache::edit::modifiedfield("/function",$parser);
850: }
851: return $result;
852: }
853:
854: sub end_function {
855: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
856: my $result = '';
857: if ($target eq 'web' || $target eq 'tex') {
858: } elsif ($target eq 'edit') {
859: $result .= &Apache::edit::end_table();
860: }
861: return $result;
862: }
863:
864: ##------------------------------------------------------------ curve data
865: sub start_data {
866: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
867: my $result='';
868: if ($target eq 'web' || $target eq 'tex') {
869: if (exists($curves[-1]->{'function'})) {
870: &Apache::lonxml::warning
871: ('Use of the <b>curve function</b> tag precludes use of '.
872: ' the <b>curve data</b> tag. '.
873: 'The curve function tag will be omitted in favor of the '.
874: 'curve data declaration.');
875: delete($curves[-1]->{'function'});
876: }
877: my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
878: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
879: # Deal with cases where we're given an array...
880: if ($datatext =~ /^\@/) {
881: $datatext = &Apache::run::run('return "'.$datatext.'"',
882: $safeeval,1);
883: }
884: $datatext =~ s/\s+/ /g;
885: # Need to do some error checking on the @data array -
886: # make sure it's all numbers and make sure each array
887: # is of the same length.
888: my @data;
889: if ($datatext =~ /,/) { # comma deliminated
890: @data = split /,/,$datatext;
891: } else { # Assume it's space separated.
892: @data = split / /,$datatext;
893: }
894: for (my $i=0;$i<=$#data;$i++) {
895: # Check that it's non-empty
896: if (! defined($data[$i])) {
897: &Apache::lonxml::warning(
898: 'undefined curve data value. Replacing with '.
899: ' pi/e = 1.15572734979092');
900: $data[$i] = 1.15572734979092;
901: }
902: # Check that it's a number
903: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
904: &Apache::lonxml::warning(
905: 'Bad curve data value of '.$data[$i].' Replacing with '.
906: ' pi/e = 1.15572734979092');
907: $data[$i] = 1.15572734979092;
908: }
909: }
910: # complain if the number of data points is not the same as
911: # in previous sets of data.
912: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
913: &Apache::lonxml::warning
914: ('Number of data points is not consistent with previous '.
915: 'number of data points');
916: }
917: push @{$curves[-1]->{'data'}},\@data;
918: } elsif ($target eq 'edit') {
919: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
920: my $text = &Apache::lonxml::get_all_text("/data",$parser);
921: $result .= &Apache::edit::end_row().
922: &Apache::edit::start_spanning_row().
923: &Apache::edit::editline('',$text,'',60);
924: } elsif ($target eq 'modified') {
925: $result.=&Apache::edit::rebuild_tag($token);
926: $result.=&Apache::edit::modifiedfield("/data",$parser);
927: }
928: return $result;
929: }
930:
931: sub end_data {
932: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
933: my $result = '';
934: if ($target eq 'web' || $target eq 'tex') {
935: } elsif ($target eq 'edit') {
936: $result .= &Apache::edit::end_table();
937: }
938: return $result;
939: }
940:
941: ##------------------------------------------------------------------- axis
942: sub start_axis {
943: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
944: my $result='';
945: if ($target eq 'web' || $target eq 'tex') {
946: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
947: $tagstack->[-1]);
948: } elsif ($target eq 'edit') {
949: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
950: $result .= &edit_attributes($target,$token,\%axis_defaults,
951: \@axis_edit_order);
952: } elsif ($target eq 'modified') {
953: my $constructtag=&Apache::edit::get_new_args
954: ($token,$parstack,$safeeval,keys(%axis_defaults));
955: if ($constructtag) {
956: $result = &Apache::edit::rebuild_tag($token);
957: }
958: }
959: return $result;
960: }
961:
962: sub end_axis {
963: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
964: my $result = '';
965: if ($target eq 'web' || $target eq 'tex') {
966: } elsif ($target eq 'edit') {
967: $result.=&Apache::edit::tag_end($target,$token);
968: } elsif ($target eq 'modified') {
969: }
970: return $result;
971: }
972:
973: ###################################################################
974: ## ##
975: ## Utility Functions ##
976: ## ##
977: ###################################################################
978:
979: ##----------------------------------------------------------- set_defaults
980: sub set_defaults {
981: my ($var,$defaults) = @_;
982: my $key;
983: foreach $key (keys(%$defaults)) {
984: $var->{$key} = $defaults->{$key}->{'default'};
985: }
986: }
987:
988: ##------------------------------------------------------------------- misc
989: sub get_attributes{
990: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
991: foreach my $attr (keys(%{$defaults})) {
992: if ($attr eq 'texwidth' || $attr eq 'texfont') {
993: $values->{$attr} =
994: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
995: } else {
996: $values->{$attr} =
997: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
998: }
999: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1000: $values->{$attr} = $defaults->{$attr}->{'default'};
1001: next;
1002: }
1003: my $test = $defaults->{$attr}->{'test'};
1004: if (! &$test($values->{$attr})) {
1005: &Apache::lonxml::warning
1006: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1007: .$defaults->{$attr}->{'default'} );
1008: $values->{$attr} = $defaults->{$attr}->{'default'};
1009: }
1010: }
1011: return ;
1012: }
1013:
1014: ##------------------------------------------------------- write_gnuplot_file
1015: sub write_gnuplot_file {
1016: my ($tmpdir,$filename,$target)= @_;
1017: my $gnuplot_input = '';
1018: my $curve;
1019: my $pt = $Apache::lonplot::plot{'texfont'};
1020: #
1021: # Check to be sure we do not have any empty curves
1022: my @curvescopy;
1023: foreach my $curve (@curves) {
1024: if (exists($curve->{'function'})) {
1025: if ($curve->{'function'} !~ /^\s*$/) {
1026: push(@curvescopy,$curve);
1027: }
1028: } elsif (exists($curve->{'data'})) {
1029: foreach my $data (@{$curve->{'data'}}) {
1030: if (scalar(@$data) > 0) {
1031: push(@curvescopy,$curve);
1032: last;
1033: }
1034: }
1035: }
1036: }
1037: @curves = @curvescopy;
1038: # Collect all the colors
1039: my @Colors;
1040: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1041: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1042: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1043: foreach $curve (@curves) {
1044: push @Colors, ($curve->{'color'} ne '' ?
1045: $curve->{'color'} :
1046: $Apache::lonplot::plot{'fgcolor'} );
1047: }
1048: # set term
1049: if ($target eq 'web') {
1050: $gnuplot_input .= 'set term '.$weboutputformat .' ';
1051: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1052: $gnuplot_input .= $Apache::lonplot::plot{'font'} . ' ';
1053: $gnuplot_input .= 'size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1054: $gnuplot_input .= "@Colors\n";
1055: # set output
1056: $gnuplot_input .= "set output\n";
1057: } elsif ($target eq 'tex') {
1058: $gnuplot_input .= "set term postscript eps $Apache::lonplot::plot{'plotcolor'} solid \"Helvetica\" $pt \n";
1059: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1060: &Apache::lonnet::unescape($filename).".eps\"\n";
1061: }
1062: # cartesian or polar?
1063: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1064: $gnuplot_input .= 'set polar'.$/;
1065: } else {
1066: # Assume Cartesian
1067: }
1068: # margin
1069: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1070: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1071: }
1072: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1073: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1074: }
1075: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1076: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1077: }
1078: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1079: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1080: }
1081: # tic scales
1082: $gnuplot_input .= 'set ticscale '.
1083: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1084: # grid
1085: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1086: # border
1087: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1088: 'set border'.$/ :
1089: 'set noborder'.$/ );
1090: # sampling rate for non-data curves
1091: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1092: # title, xlabel, ylabel
1093: # titles
1094: if ($target eq 'tex') {
1095: $gnuplot_input .= "set title \"$title\" font \"Helvetica,".$pt."pt\"\n" if (defined($title)) ;
1096: $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
1097: $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
1098: } else {
1099: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1100: $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
1101: $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
1102: }
1103: # tics
1104: if (%xtics) {
1105: $gnuplot_input .= "set xtics $xtics{'location'} ";
1106: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1107: $gnuplot_input .= "$xtics{'start'}, ";
1108: $gnuplot_input .= "$xtics{'increment'}, ";
1109: $gnuplot_input .= "$xtics{'end'}\n";
1110: if ($xtics{'minorfreq'} != 0) {
1111: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1112: }
1113: }
1114: if (%ytics) {
1115: $gnuplot_input .= "set ytics $ytics{'location'} ";
1116: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1117: $gnuplot_input .= "$ytics{'start'}, ";
1118: $gnuplot_input .= "$ytics{'increment'}, ";
1119: $gnuplot_input .= "$ytics{'end'}\n";
1120: if ($ytics{'minorfreq'} != 0) {
1121: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1122: }
1123: }
1124: # axis
1125: if (%axis) {
1126: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1127: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1128: }
1129: # Key
1130: if (%key) {
1131: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1132: if ($key{'title'} ne '') {
1133: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1134: }
1135: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1136: } else {
1137: $gnuplot_input .= 'set nokey'.$/;
1138: }
1139: # labels
1140: my $label;
1141: foreach $label (@labels) {
1142: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1143: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
1144: if ($target eq 'tex') {
1145: $gnuplot_input .=' font "Helvetica,'.$pt.'pt"' ;
1146: }
1147: $gnuplot_input .= $/;
1148: }
1149: if ($target eq 'tex') {
1150: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1151: $gnuplot_input .="\n";
1152: }
1153: # curves
1154: $gnuplot_input .= 'plot ';
1155: for (my $i = 0;$i<=$#curves;$i++) {
1156: $curve = $curves[$i];
1157: $gnuplot_input.= ', ' if ($i > 0);
1158: if (exists($curve->{'function'})) {
1159: $gnuplot_input.=
1160: $curve->{'function'}.' title "'.
1161: $curve->{'name'}.'" with '.
1162: $curve->{'linestyle'};
1163: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1164: if (($curve->{'linestyle'} eq 'points') ||
1165: ($curve->{'linestyle'} eq 'linespoints') ||
1166: ($curve->{'linestyle'} eq 'errorbars') ||
1167: ($curve->{'linestyle'} eq 'xerrorbars') ||
1168: ($curve->{'linestyle'} eq 'yerrorbars') ||
1169: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1170: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1171: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1172: }
1173: } elsif (exists($curve->{'data'})) {
1174: # Store data values in $datatext
1175: my $datatext = '';
1176: # get new filename
1177: my $datafilename = "$tmpdir/$filename.data.$i";
1178: my $fh=Apache::File->new(">$datafilename");
1179: # Compile data
1180: my @Data = @{$curve->{'data'}};
1181: my @Data0 = @{$Data[0]};
1182: for (my $i =0; $i<=$#Data0; $i++) {
1183: my $dataset;
1184: foreach $dataset (@Data) {
1185: $datatext .= $dataset->[$i] . ' ';
1186: }
1187: $datatext .= $/;
1188: }
1189: # write file
1190: print $fh $datatext;
1191: close ($fh);
1192: # generate gnuplot text
1193: $gnuplot_input.= '"'.$datafilename.'" title "'.
1194: $curve->{'name'}.'" with '.
1195: $curve->{'linestyle'};
1196: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1197: if (($curve->{'linestyle'} eq 'points') ||
1198: ($curve->{'linestyle'} eq 'linespoints') ||
1199: ($curve->{'linestyle'} eq 'errorbars') ||
1200: ($curve->{'linestyle'} eq 'xerrorbars') ||
1201: ($curve->{'linestyle'} eq 'yerrorbars') ||
1202: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1203: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1204: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1205: }
1206: }
1207: }
1208: # Write the output to a file.
1209: my $fh=Apache::File->new(">$tmpdir$filename.data");
1210: print $fh $gnuplot_input;
1211: close($fh);
1212: # That's all folks.
1213: return ;
1214: }
1215:
1216: #---------------------------------------------- check_inputs
1217: sub check_inputs {
1218: ## Note: no inputs, no outputs - this acts only on global variables.
1219: ## Make sure we have all the input we need:
1220: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1221: if (! %key ) {} # No key for this plot, thats okay
1222: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1223: if (! defined($title )) {} # No title for this plot, thats okay
1224: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1225: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1226: if ($#labels < 0) { } # No labels for this plot, thats okay
1227: if ($#curves < 0) {
1228: &Apache::lonxml::warning("No curves specified for plot!!!!");
1229: return '';
1230: }
1231: my $curve;
1232: foreach $curve (@curves) {
1233: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1234: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1235: return '';
1236: }
1237: }
1238: }
1239:
1240: #------------------------------------------------ make_edit
1241: sub edit_attributes {
1242: my ($target,$token,$defaults,$keys) = @_;
1243: my ($result,@keys);
1244: if ($keys && ref($keys) eq 'ARRAY') {
1245: @keys = @$keys;
1246: } else {
1247: @keys = sort(keys(%$defaults));
1248: }
1249: foreach my $attr (@keys) {
1250: # append a ' ' to the description if it doesn't have one already.
1251: my $description = $defaults->{$attr}->{'description'};
1252: $description .= ' ' if ($description !~ / $/);
1253: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1254: $result .= &Apache::edit::text_arg
1255: ($description,$attr,$token,
1256: $defaults->{$attr}->{'size'});
1257: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1258: $result .= &Apache::edit::select_or_text_arg
1259: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1260: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1261: $result .= &Apache::edit::select_or_text_arg
1262: ($description,$attr,['on','off'],$token);
1263: }
1264: $result .= '<br />';
1265: }
1266: return $result;
1267: }
1268:
1269:
1270: ###################################################################
1271: ## ##
1272: ## Insertion functions for editing plots ##
1273: ## ##
1274: ###################################################################
1275:
1276: sub insert_gnuplot {
1277: my $result = '';
1278: # plot attributes
1279: $result .= "\n<gnuplot ";
1280: foreach my $attr (keys(%gnuplot_defaults)) {
1281: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1282: }
1283: $result .= ">";
1284: # Add the components (most are commented out for simplicity)
1285: # $result .= &insert_key();
1286: # $result .= &insert_axis();
1287: # $result .= &insert_title();
1288: # $result .= &insert_xlabel();
1289: # $result .= &insert_ylabel();
1290: $result .= &insert_curve();
1291: # close up the <gnuplot>
1292: $result .= "\n</gnuplot>";
1293: return $result;
1294: }
1295:
1296: sub insert_tics {
1297: my $result;
1298: $result .= &insert_xtics() . &insert_ytics;
1299: return $result;
1300: }
1301:
1302: sub insert_xtics {
1303: my $result;
1304: $result .= "\n <xtics ";
1305: foreach my $attr (keys(%tic_defaults)) {
1306: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1307: }
1308: $result .= "/>";
1309: return $result;
1310: }
1311:
1312: sub insert_ytics {
1313: my $result;
1314: $result .= "\n <ytics ";
1315: foreach my $attr (keys(%tic_defaults)) {
1316: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1317: }
1318: $result .= "/>";
1319: return $result;
1320: }
1321:
1322: sub insert_key {
1323: my $result;
1324: $result .= "\n <key ";
1325: foreach my $attr (keys(%key_defaults)) {
1326: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1327: }
1328: $result .= " />";
1329: return $result;
1330: }
1331:
1332: sub insert_axis{
1333: my $result;
1334: $result .= "\n <axis ";
1335: foreach my $attr (keys(%axis_defaults)) {
1336: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1337: }
1338: $result .= " />";
1339: return $result;
1340: }
1341:
1342: sub insert_title { return "\n <title></title>"; }
1343: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1344: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1345:
1346: sub insert_label {
1347: my $result;
1348: $result .= "\n <label ";
1349: foreach my $attr (keys(%label_defaults)) {
1350: $result .= "\n $attr=\"".
1351: $label_defaults{$attr}->{'default'}."\"";
1352: }
1353: $result .= "></label>";
1354: return $result;
1355: }
1356:
1357: sub insert_curve {
1358: my $result;
1359: $result .= "\n <curve ";
1360: foreach my $attr (keys(%curve_defaults)) {
1361: $result .= "\n $attr=\"".
1362: $curve_defaults{$attr}->{'default'}."\"";
1363: }
1364: $result .= " >";
1365: $result .= &insert_data().&insert_data()."\n </curve>";
1366: }
1367:
1368: sub insert_function {
1369: my $result;
1370: $result .= "\n <function></function>";
1371: return $result;
1372: }
1373:
1374: sub insert_data {
1375: my $result;
1376: $result .= "\n <data></data>";
1377: return $result;
1378: }
1379:
1380: ##----------------------------------------------------------------------
1381: 1;
1382: __END__
1383:
1384:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonplot.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / xml