1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.106 2005/04/07 06:56:27 albertel 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: BEGIN {
43: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
44: #
45: # Determine the version of GNUPLOT
46: $weboutputformat = 'gif';
47: $versionstring = `gnuplot --version 2>/dev/null`;
48: if ($versionstring =~ /^gnuplot 4/) {
49: $weboutputformat = 'png';
50: }
51: }
52:
53: ##
54: ## Description of data structures:
55: ##
56: ## %plot %key %axis
57: ## --------------------------
58: ## height title color
59: ## width box xmin
60: ## bgcolor pos xmax
61: ## fgcolor ymin
62: ## transparent ymax
63: ## grid
64: ## border
65: ## font
66: ## align
67: ##
68: ## @labels: $labels[$i] = \%label
69: ## %label: text, xpos, ypos, justify
70: ##
71: ## @curves: $curves[$i] = \%curve
72: ## %curve: name, linestyle, ( function | data )
73: ##
74: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
75: ## [y1,y2,y3,y4] ]
76: ##
77:
78: ###################################################################
79: ## ##
80: ## Tests used in checking the validitity of input ##
81: ## ##
82: ###################################################################
83:
84: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
85: # is longer than this, it will be truncated.
86:
87: my %linestyles =
88: (
89: lines => 2, # Maybe this will be used in the future
90: linespoints => 2, # to check on whether or not they have
91: dots => 2, # supplied enough <data></data> fields
92: points => 2, # to use the given line style. But for
93: steps => 2, # now there are more important things
94: fsteps => 2, # for me to deal with.
95: histeps => 2,
96: errorbars => 3,
97: xerrorbars => [3,4],
98: yerrorbars => [3,4],
99: xyerrorbars => [4,6],
100: boxes => 3,
101: vector => 4
102: );
103:
104: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
105: my $real_test =
106: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
107: my $pos_real_test =
108: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
109: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
110: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
111: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
112: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
113: my $linestyle_test = sub {exists($linestyles{$_[0]})};
114: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
115:
116: ###################################################################
117: ## ##
118: ## Attribute metadata ##
119: ## ##
120: ###################################################################
121: my @gnuplot_edit_order =
122: qw/alttag bgcolor fgcolor height width font transparent grid samples
123: border align texwidth texfont plotcolor plottype lmargin rmargin tmargin
124: bmargin major_ticscale minor_ticscale/;
125:
126: my $margin_choices = ['default',0..20];
127:
128: my %gnuplot_defaults =
129: (
130: alttag => {
131: default => 'dynamically generated plot',
132: test => $words_test,
133: description => 'brief description of the plot',
134: edit_type => 'entry',
135: size => '40'
136: },
137: height => {
138: default => 300,
139: test => $int_test,
140: description => 'height of image (pixels)',
141: edit_type => 'entry',
142: size => '10'
143: },
144: width => {
145: default => 400,
146: test => $int_test,
147: description => 'width of image (pixels)',
148: edit_type => 'entry',
149: size => '10'
150: },
151: bgcolor => {
152: default => 'xffffff',
153: test => $color_test,
154: description => 'background color of image (xffffff)',
155: edit_type => 'entry',
156: size => '10'
157: },
158: fgcolor => {
159: default => 'x000000',
160: test => $color_test,
161: description => 'foreground color of image (x000000)',
162: edit_type => 'entry',
163: size => '10'
164: },
165: transparent => {
166: default => 'off',
167: test => $onoff_test,
168: description => 'Transparent image',
169: edit_type => 'onoff'
170: },
171: grid => {
172: default => 'on',
173: test => $onoff_test,
174: description => 'Display grid',
175: edit_type => 'onoff'
176: },
177: border => {
178: default => 'on',
179: test => $onoff_test,
180: description => 'Draw border around plot',
181: edit_type => 'onoff'
182: },
183: font => {
184: default => 'medium',
185: test => $sml_test,
186: description => 'Size of font to use',
187: edit_type => 'choice',
188: choices => ['small','medium','large']
189: },
190: samples => {
191: default => '100',
192: test => $int_test,
193: description => 'Number of samples for non-data plots',
194: edit_type => 'choice',
195: choices => ['100','200','500','1000','2000','5000']
196: },
197: align => {
198: default => 'center',
199: test => sub {$_[0]=~/^(left|right|center)$/},
200: description => 'alignment for image in html',
201: edit_type => 'choice',
202: choices => ['left','right','center']
203: },
204: texwidth => {
205: default => '93',
206: test => $int_test,
207: description => 'Width of plot when printed (mm)',
208: edit_type => 'entry',
209: size => '5'
210: },
211: texfont => {
212: default => '22',
213: test => $int_test,
214: description => 'Font size to use in TeX output (pts):',
215: edit_type => 'choice',
216: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
217: },
218: plotcolor => {
219: default => 'monochrome',
220: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
221: description => 'Color setting for printing:',
222: edit_type => 'choice',
223: choices => [qw/monochrome color colour/],
224: },
225: plottype => {
226: default => 'Cartesian',
227: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
228: description => 'Plot type:',
229: edit_type => 'choice',
230: choices => ['Cartesian','Polar']
231: },
232: lmargin => {
233: default => 'default',
234: test => sub {$_[0]=~/^(default|\d+)$/},
235: description => 'Left margin width (pts):',
236: edit_type => 'choice',
237: choices => $margin_choices,
238: },
239: rmargin => {
240: default => 'default',
241: test => sub {$_[0]=~/^(default|\d+)$/},
242: description => 'Right margin width (pts):',
243: edit_type => 'choice',
244: choices => $margin_choices,
245: },
246: tmargin => {
247: default => 'default',
248: test => sub {$_[0]=~/^(default|\d+)$/},
249: description => 'Top margin width (pts):',
250: edit_type => 'choice',
251: choices => $margin_choices,
252: },
253: bmargin => {
254: default => 'default',
255: test => sub {$_[0]=~/^(default|\d+)$/},
256: description => 'Bottom margin width (pts):',
257: edit_type => 'choice',
258: choices => $margin_choices,
259: },
260: major_ticscale => {
261: default => '1',
262: test => $real_test,
263: description => 'Size of major tic marks (plot coordinates)',
264: edit_type => 'entry',
265: size => '5'
266: },
267: minor_ticscale => {
268: default => '0.5',
269: test => $real_test,
270: description => 'Size of minor tic mark (plot coordinates)',
271: edit_type => 'entry',
272: size => '5'
273: },
274: );
275:
276: my %key_defaults =
277: (
278: title => {
279: default => '',
280: test => $words_test,
281: description => 'Title of key',
282: edit_type => 'entry',
283: size => '40'
284: },
285: box => {
286: default => 'off',
287: test => $onoff_test,
288: description => 'Draw a box around the key?',
289: edit_type => 'onoff'
290: },
291: pos => {
292: default => 'top right',
293: test => $key_pos_test,
294: description => 'position of the key on the plot',
295: edit_type => 'choice',
296: choices => ['top left','top right','bottom left','bottom right',
297: 'outside','below']
298: }
299: );
300:
301: my %label_defaults =
302: (
303: xpos => {
304: default => 0,
305: test => $real_test,
306: description => 'x position of label (graph coordinates)',
307: edit_type => 'entry',
308: size => '10'
309: },
310: ypos => {
311: default => 0,
312: test => $real_test,
313: description => 'y position of label (graph coordinates)',
314: edit_type => 'entry',
315: size => '10'
316: },
317: justify => {
318: default => 'left',
319: test => sub {$_[0]=~/^(left|right|center)$/},
320: description => 'justification of the label text on the plot',
321: edit_type => 'choice',
322: choices => ['left','right','center']
323: }
324: );
325:
326: my @tic_edit_order = ('location','mirror','start','increment','end',
327: 'minorfreq');
328: my %tic_defaults =
329: (
330: location => {
331: default => 'border',
332: test => sub {$_[0]=~/^(border|axis)$/},
333: description => 'Location of major tic marks',
334: edit_type => 'choice',
335: choices => ['border','axis']
336: },
337: mirror => {
338: default => 'on',
339: test => $onoff_test,
340: description => 'mirror tics on opposite axis?',
341: edit_type => 'onoff'
342: },
343: start => {
344: default => '-10.0',
345: test => $real_test,
346: description => 'Start major tics at',
347: edit_type => 'entry',
348: size => '10'
349: },
350: increment => {
351: default => '1.0',
352: test => $real_test,
353: description => 'Place a major tic every',
354: edit_type => 'entry',
355: size => '10'
356: },
357: end => {
358: default => ' 10.0',
359: test => $real_test,
360: description => 'Stop major tics at ',
361: edit_type => 'entry',
362: size => '10'
363: },
364: minorfreq => {
365: default => '0',
366: test => $int_test,
367: description => 'Number of minor tics per major tic mark',
368: edit_type => 'entry',
369: size => '10'
370: },
371: );
372:
373: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
374: my %axis_defaults =
375: (
376: color => {
377: default => 'x000000',
378: test => $color_test,
379: description => 'color of grid lines (x000000)',
380: edit_type => 'entry',
381: size => '10'
382: },
383: xmin => {
384: default => '-10.0',
385: test => $real_test,
386: description => 'minimum x-value shown in plot',
387: edit_type => 'entry',
388: size => '10'
389: },
390: xmax => {
391: default => ' 10.0',
392: test => $real_test,
393: description => 'maximum x-value shown in plot',
394: edit_type => 'entry',
395: size => '10'
396: },
397: ymin => {
398: default => '-10.0',
399: test => $real_test,
400: description => 'minimum y-value shown in plot',
401: edit_type => 'entry',
402: size => '10'
403: },
404: ymax => {
405: default => ' 10.0',
406: test => $real_test,
407: description => 'maximum y-value shown in plot',
408: edit_type => 'entry',
409: size => '10'
410: }
411: );
412:
413: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
414:
415: my %curve_defaults =
416: (
417: color => {
418: default => 'x000000',
419: test => $color_test,
420: description => 'color of curve (x000000)',
421: edit_type => 'entry',
422: size => '10'
423: },
424: name => {
425: default => '',
426: test => $words_test,
427: description => 'name of curve to appear in key',
428: edit_type => 'entry',
429: size => '20'
430: },
431: linestyle => {
432: default => 'lines',
433: test => $linestyle_test,
434: description => 'Line style',
435: edit_type => 'choice',
436: choices => [keys(%linestyles)]
437: },
438: # gnuplots term=gif driver does not handle linewidth :(
439: # linewidth => {
440: # default => 1,
441: # test => $int_test,
442: # description => 'Line width (may not apply to all line styles)',
443: # edit_type => 'choice',
444: # choices => [1,2,3,4,5,6,7,8,9,10]
445: # },
446: pointsize => {
447: default => 1,
448: test => $pos_real_test,
449: description => 'point size (may not apply to all line styles)',
450: edit_type => 'entry',
451: size => '5'
452: },
453: pointtype => {
454: default => 1,
455: test => $int_test,
456: description => 'point type (may not apply to all line styles)',
457: edit_type => 'choice',
458: choices => [0,1,2,3,4,5,6]
459: }
460: );
461:
462: ###################################################################
463: ## ##
464: ## parsing and edit rendering ##
465: ## ##
466: ###################################################################
467: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
468:
469: sub start_gnuplot {
470: undef(%plot); undef(%key); undef(%axis);
471: undef($title); undef($xlabel); undef($ylabel);
472: undef(@labels); undef(@curves);
473: undef(%xtics); undef(%ytics);
474: #
475: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
476: my $result='';
477: &Apache::lonxml::register('Apache::lonplot',
478: ('title','xlabel','ylabel','key','axis','label','curve',
479: 'xtics','ytics'));
480: push (@Apache::lonxml::namespace,'lonplot');
481: if ($target eq 'web' || $target eq 'tex') {
482: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
483: $tagstack->[-1]);
484: } elsif ($target eq 'edit') {
485: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
486: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
487: \@gnuplot_edit_order);
488: } elsif ($target eq 'modified') {
489: my $constructtag=&Apache::edit::get_new_args
490: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
491: if ($constructtag) {
492: $result = &Apache::edit::rebuild_tag($token);
493: }
494: }
495: return $result;
496: }
497:
498: sub end_gnuplot {
499: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
500: pop @Apache::lonxml::namespace;
501: &Apache::lonxml::deregister('Apache::lonplot',
502: ('title','xlabel','ylabel','key','axis','label','curve'));
503: my $result = '';
504: my $randnumber;
505: # need to call rand everytime start_script would evaluate, as the
506: # safe space rand number generator and the global rand generator
507: # are not separate
508: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
509: $target eq 'answer') {
510: $randnumber=int(rand(1000));
511: }
512: if ($target eq 'web' || $target eq 'tex') {
513: &check_inputs(); # Make sure we have all the data we need
514: ##
515: ## Determine filename
516: my $tmpdir = '/home/httpd/perl/tmp/';
517: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
518: '_'.time.'_'.$$.$randnumber.'_plot';
519: ## Write the plot description to the file
520: &write_gnuplot_file($tmpdir,$filename,$target);
521: $filename = &Apache::lonnet::escape($filename);
522: ## return image tag for the plot
523: if ($target eq 'web') {
524: $result .= <<"ENDIMAGE";
525: <img src = "/cgi-bin/plot.gif?file=$filename.data&output=$weboutputformat"
526: width = "$plot{'width'}"
527: height = "$plot{'height'}"
528: align = "$plot{'align'}"
529: alt = "$plot{'alttag'}" />
530: ENDIMAGE
531: } elsif ($target eq 'tex') {
532: #might be inside the safe space, register the URL for later
533: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
534: $result = '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics[width='.$plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.eps}';
535: }
536: } elsif ($target eq 'edit') {
537: $result.=&Apache::edit::tag_end($target,$token);
538: }
539: return $result;
540: }
541:
542:
543: ##--------------------------------------------------------------- xtics
544: sub start_xtics {
545: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
546: my $result='';
547: if ($target eq 'web' || $target eq 'tex') {
548: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
549: $tagstack->[-1]);
550: } elsif ($target eq 'edit') {
551: $result .= &Apache::edit::tag_start($target,$token,'xtics');
552: $result .= &edit_attributes($target,$token,\%tic_defaults,
553: \@tic_edit_order);
554: } elsif ($target eq 'modified') {
555: my $constructtag=&Apache::edit::get_new_args
556: ($token,$parstack,$safeeval,keys(%tic_defaults));
557: if ($constructtag) {
558: $result = &Apache::edit::rebuild_tag($token);
559: }
560: }
561: return $result;
562: }
563:
564: sub end_xtics {
565: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
566: my $result = '';
567: if ($target eq 'web' || $target eq 'tex') {
568: } elsif ($target eq 'edit') {
569: $result.=&Apache::edit::tag_end($target,$token);
570: }
571: return $result;
572: }
573:
574: ##--------------------------------------------------------------- ytics
575: sub start_ytics {
576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
577: my $result='';
578: if ($target eq 'web' || $target eq 'tex') {
579: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
580: $tagstack->[-1]);
581: } elsif ($target eq 'edit') {
582: $result .= &Apache::edit::tag_start($target,$token,'ytics');
583: $result .= &edit_attributes($target,$token,\%tic_defaults,
584: \@tic_edit_order);
585: } elsif ($target eq 'modified') {
586: my $constructtag=&Apache::edit::get_new_args
587: ($token,$parstack,$safeeval,keys(%tic_defaults));
588: if ($constructtag) {
589: $result = &Apache::edit::rebuild_tag($token);
590: }
591: }
592: return $result;
593: }
594:
595: sub end_ytics {
596: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
597: my $result = '';
598: if ($target eq 'web' || $target eq 'tex') {
599: } elsif ($target eq 'edit') {
600: $result.=&Apache::edit::tag_end($target,$token);
601: }
602: return $result;
603: }
604:
605:
606: ##----------------------------------------------------------------- key
607: sub start_key {
608: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
609: my $result='';
610: if ($target eq 'web' || $target eq 'tex') {
611: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
612: $tagstack->[-1]);
613: } elsif ($target eq 'edit') {
614: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
615: $result .= &edit_attributes($target,$token,\%key_defaults);
616: } elsif ($target eq 'modified') {
617: my $constructtag=&Apache::edit::get_new_args
618: ($token,$parstack,$safeeval,keys(%key_defaults));
619: if ($constructtag) {
620: $result = &Apache::edit::rebuild_tag($token);
621: }
622: }
623: return $result;
624: }
625:
626: sub end_key {
627: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
628: my $result = '';
629: if ($target eq 'web' || $target eq 'tex') {
630: } elsif ($target eq 'edit') {
631: $result.=&Apache::edit::tag_end($target,$token);
632: }
633: return $result;
634: }
635:
636: ##------------------------------------------------------------------- title
637: sub start_title {
638: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
639: my $result='';
640: if ($target eq 'web' || $target eq 'tex') {
641: $title = &Apache::lonxml::get_all_text("/title",$parser);
642: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
643: $title =~ s/\n/ /g;
644: if (length($title) > $max_str_len) {
645: $title = substr($title,0,$max_str_len);
646: }
647: } elsif ($target eq 'edit') {
648: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
649: my $text=&Apache::lonxml::get_all_text("/title",$parser);
650: $result.=&Apache::edit::end_row().
651: &Apache::edit::start_spanning_row().
652: &Apache::edit::editline('',$text,'',60);
653: } elsif ($target eq 'modified') {
654: $result.=&Apache::edit::rebuild_tag($token);
655: $result.=&Apache::edit::modifiedfield("/title",$parser);
656: }
657: return $result;
658: }
659:
660: sub end_title {
661: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
662: my $result = '';
663: if ($target eq 'web' || $target eq 'tex') {
664: } elsif ($target eq 'edit') {
665: $result.=&Apache::edit::tag_end($target,$token);
666: }
667: return $result;
668: }
669: ##------------------------------------------------------------------- xlabel
670: sub start_xlabel {
671: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
672: my $result='';
673: if ($target eq 'web' || $target eq 'tex') {
674: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
675: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
676: $xlabel =~ s/\n/ /g;
677: if (length($xlabel) > $max_str_len) {
678: $xlabel = substr($xlabel,0,$max_str_len);
679: }
680: } elsif ($target eq 'edit') {
681: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
682: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
683: $result.=&Apache::edit::end_row().
684: &Apache::edit::start_spanning_row().
685: &Apache::edit::editline('',$text,'',60);
686: } elsif ($target eq 'modified') {
687: $result.=&Apache::edit::rebuild_tag($token);
688: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
689: }
690: return $result;
691: }
692:
693: sub end_xlabel {
694: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
695: my $result = '';
696: if ($target eq 'web' || $target eq 'tex') {
697: } elsif ($target eq 'edit') {
698: $result.=&Apache::edit::tag_end($target,$token);
699: }
700: return $result;
701: }
702:
703: ##------------------------------------------------------------------- ylabel
704: sub start_ylabel {
705: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
706: my $result='';
707: if ($target eq 'web' || $target eq 'tex') {
708: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
709: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
710: $ylabel =~ s/\n/ /g;
711: if (length($ylabel) > $max_str_len) {
712: $ylabel = substr($ylabel,0,$max_str_len);
713: }
714: } elsif ($target eq 'edit') {
715: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
716: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
717: $result .= &Apache::edit::end_row().
718: &Apache::edit::start_spanning_row().
719: &Apache::edit::editline('',$text,'',60);
720: } elsif ($target eq 'modified') {
721: $result.=&Apache::edit::rebuild_tag($token);
722: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
723: }
724: return $result;
725: }
726:
727: sub end_ylabel {
728: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
729: my $result = '';
730: if ($target eq 'web' || $target eq 'tex') {
731: } elsif ($target eq 'edit') {
732: $result.=&Apache::edit::tag_end($target,$token);
733: }
734: return $result;
735: }
736:
737: ##------------------------------------------------------------------- label
738: sub start_label {
739: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
740: my $result='';
741: if ($target eq 'web' || $target eq 'tex') {
742: my %label;
743: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
744: $tagstack->[-1]);
745: my $text = &Apache::lonxml::get_all_text("/label",$parser);
746: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
747: $text =~ s/\n/ /g;
748: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
749: $label{'text'} = $text;
750: push(@labels,\%label);
751: } elsif ($target eq 'edit') {
752: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
753: $result .= &edit_attributes($target,$token,\%label_defaults);
754: my $text = &Apache::lonxml::get_all_text("/label",$parser);
755: $result .= &Apache::edit::end_row().
756: &Apache::edit::start_spanning_row().
757: &Apache::edit::editline('',$text,'',60);
758: } elsif ($target eq 'modified') {
759: &Apache::edit::get_new_args
760: ($token,$parstack,$safeeval,keys(%label_defaults));
761: $result.=&Apache::edit::rebuild_tag($token);
762: $result.=&Apache::edit::modifiedfield("/label",$parser);
763: }
764: return $result;
765: }
766:
767: sub end_label {
768: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
769: my $result = '';
770: if ($target eq 'web' || $target eq 'tex') {
771: } elsif ($target eq 'edit') {
772: $result.=&Apache::edit::tag_end($target,$token);
773: }
774: return $result;
775: }
776:
777: ##------------------------------------------------------------------- curve
778: sub start_curve {
779: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
780: my $result='';
781: &Apache::lonxml::register('Apache::lonplot',('function','data'));
782: push (@Apache::lonxml::namespace,'curve');
783: if ($target eq 'web' || $target eq 'tex') {
784: my %curve;
785: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
786: $tagstack->[-1]);
787: push (@curves,\%curve);
788: } elsif ($target eq 'edit') {
789: $result .= &Apache::edit::tag_start($target,$token,'Curve');
790: $result .= &edit_attributes($target,$token,\%curve_defaults,
791: \@curve_edit_order);
792: } elsif ($target eq 'modified') {
793: my $constructtag=&Apache::edit::get_new_args
794: ($token,$parstack,$safeeval,keys(%curve_defaults));
795: if ($constructtag) {
796: $result = &Apache::edit::rebuild_tag($token);
797: $result.= &Apache::edit::handle_insert();
798: }
799: }
800: return $result;
801: }
802:
803: sub end_curve {
804: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
805: my $result = '';
806: pop @Apache::lonxml::namespace;
807: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
808: if ($target eq 'web' || $target eq 'tex') {
809: } elsif ($target eq 'edit') {
810: $result.=&Apache::edit::tag_end($target,$token);
811: }
812: return $result;
813: }
814:
815: ##------------------------------------------------------------ curve function
816: sub start_function {
817: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
818: my $result='';
819: if ($target eq 'web' || $target eq 'tex') {
820: if (exists($curves[-1]->{'data'})) {
821: &Apache::lonxml::warning
822: ('Use of the <b>curve function</b> tag precludes use of '.
823: ' the <b>curve data</b> tag. '.
824: 'The curve data tag will be omitted in favor of the '.
825: 'curve function declaration.');
826: delete $curves[-1]->{'data'} ;
827: }
828: my $function = &Apache::lonxml::get_all_text("/function",$parser);
829: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
830: $curves[-1]->{'function'} = $function;
831: } elsif ($target eq 'edit') {
832: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
833: my $text = &Apache::lonxml::get_all_text("/function",$parser);
834: $result .= &Apache::edit::end_row().
835: &Apache::edit::start_spanning_row().
836: &Apache::edit::editline('',$text,'',60);
837: } elsif ($target eq 'modified') {
838: $result.=&Apache::edit::rebuild_tag($token);
839: $result.=&Apache::edit::modifiedfield("/function",$parser);
840: }
841: return $result;
842: }
843:
844: sub end_function {
845: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
846: my $result = '';
847: if ($target eq 'web' || $target eq 'tex') {
848: } elsif ($target eq 'edit') {
849: $result .= &Apache::edit::end_table();
850: }
851: return $result;
852: }
853:
854: ##------------------------------------------------------------ curve data
855: sub start_data {
856: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
857: my $result='';
858: if ($target eq 'web' || $target eq 'tex') {
859: if (exists($curves[-1]->{'function'})) {
860: &Apache::lonxml::warning
861: ('Use of the <b>curve function</b> tag precludes use of '.
862: ' the <b>curve data</b> tag. '.
863: 'The curve function tag will be omitted in favor of the '.
864: 'curve data declaration.');
865: delete($curves[-1]->{'function'});
866: }
867: my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
868: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
869: # Deal with cases where we're given an array...
870: if ($datatext =~ /^\@/) {
871: $datatext = &Apache::run::run('return "'.$datatext.'"',
872: $safeeval,1);
873: }
874: $datatext =~ s/\s+/ /g;
875: # Need to do some error checking on the @data array -
876: # make sure it's all numbers and make sure each array
877: # is of the same length.
878: my @data;
879: if ($datatext =~ /,/) { # comma deliminated
880: @data = split /,/,$datatext;
881: } else { # Assume it's space separated.
882: @data = split / /,$datatext;
883: }
884: for (my $i=0;$i<=$#data;$i++) {
885: # Check that it's non-empty
886: if (! defined($data[$i])) {
887: &Apache::lonxml::warning(
888: 'undefined curve data value. Replacing with '.
889: ' pi/e = 1.15572734979092');
890: $data[$i] = 1.15572734979092;
891: }
892: # Check that it's a number
893: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
894: &Apache::lonxml::warning(
895: 'Bad curve data value of '.$data[$i].' Replacing with '.
896: ' pi/e = 1.15572734979092');
897: $data[$i] = 1.15572734979092;
898: }
899: }
900: # complain if the number of data points is not the same as
901: # in previous sets of data.
902: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
903: &Apache::lonxml::warning
904: ('Number of data points is not consistent with previous '.
905: 'number of data points');
906: }
907: push @{$curves[-1]->{'data'}},\@data;
908: } elsif ($target eq 'edit') {
909: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
910: my $text = &Apache::lonxml::get_all_text("/data",$parser);
911: $result .= &Apache::edit::end_row().
912: &Apache::edit::start_spanning_row().
913: &Apache::edit::editline('',$text,'',60);
914: } elsif ($target eq 'modified') {
915: $result.=&Apache::edit::rebuild_tag($token);
916: $result.=&Apache::edit::modifiedfield("/data",$parser);
917: }
918: return $result;
919: }
920:
921: sub end_data {
922: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
923: my $result = '';
924: if ($target eq 'web' || $target eq 'tex') {
925: } elsif ($target eq 'edit') {
926: $result .= &Apache::edit::end_table();
927: }
928: return $result;
929: }
930:
931: ##------------------------------------------------------------------- axis
932: sub start_axis {
933: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
934: my $result='';
935: if ($target eq 'web' || $target eq 'tex') {
936: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
937: $tagstack->[-1]);
938: } elsif ($target eq 'edit') {
939: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
940: $result .= &edit_attributes($target,$token,\%axis_defaults,
941: \@axis_edit_order);
942: } elsif ($target eq 'modified') {
943: my $constructtag=&Apache::edit::get_new_args
944: ($token,$parstack,$safeeval,keys(%axis_defaults));
945: if ($constructtag) {
946: $result = &Apache::edit::rebuild_tag($token);
947: }
948: }
949: return $result;
950: }
951:
952: sub end_axis {
953: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
954: my $result = '';
955: if ($target eq 'web' || $target eq 'tex') {
956: } elsif ($target eq 'edit') {
957: $result.=&Apache::edit::tag_end($target,$token);
958: } elsif ($target eq 'modified') {
959: }
960: return $result;
961: }
962:
963: ###################################################################
964: ## ##
965: ## Utility Functions ##
966: ## ##
967: ###################################################################
968:
969: ##----------------------------------------------------------- set_defaults
970: sub set_defaults {
971: my ($var,$defaults) = @_;
972: my $key;
973: foreach $key (keys(%$defaults)) {
974: $var->{$key} = $defaults->{$key}->{'default'};
975: }
976: }
977:
978: ##------------------------------------------------------------------- misc
979: sub get_attributes{
980: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
981: foreach my $attr (keys(%{$defaults})) {
982: if ($attr eq 'texwidth' || $attr eq 'texfont') {
983: $values->{$attr} =
984: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
985: } else {
986: $values->{$attr} =
987: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
988: }
989: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
990: $values->{$attr} = $defaults->{$attr}->{'default'};
991: next;
992: }
993: my $test = $defaults->{$attr}->{'test'};
994: if (! &$test($values->{$attr})) {
995: &Apache::lonxml::warning
996: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
997: .$defaults->{$attr}->{'default'} );
998: $values->{$attr} = $defaults->{$attr}->{'default'};
999: }
1000: }
1001: return ;
1002: }
1003:
1004: ##------------------------------------------------------- write_gnuplot_file
1005: sub write_gnuplot_file {
1006: my ($tmpdir,$filename,$target)= @_;
1007: my $gnuplot_input = '';
1008: my $curve;
1009: my $pt = $plot{'texfont'};
1010: #
1011: # Check to be sure we do not have any empty curves
1012: my @curvescopy;
1013: foreach my $curve (@curves) {
1014: if (exists($curve->{'function'})) {
1015: if ($curve->{'function'} !~ /^\s*$/) {
1016: push(@curvescopy,$curve);
1017: }
1018: } elsif (exists($curve->{'data'})) {
1019: foreach my $data (@{$curve->{'data'}}) {
1020: if (scalar(@$data) > 0) {
1021: push(@curvescopy,$curve);
1022: last;
1023: }
1024: }
1025: }
1026: }
1027: @curves = @curvescopy;
1028: # Collect all the colors
1029: my @Colors;
1030: push @Colors, $plot{'bgcolor'};
1031: push @Colors, $plot{'fgcolor'};
1032: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1033: foreach $curve (@curves) {
1034: push @Colors, ($curve->{'color'} ne '' ?
1035: $curve->{'color'} :
1036: $plot{'fgcolor'} );
1037: }
1038: # set term
1039: if ($target eq 'web') {
1040: $gnuplot_input .= 'set term '.$weboutputformat .' ';
1041: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
1042: $gnuplot_input .= $plot{'font'} . ' ';
1043: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1044: $gnuplot_input .= "@Colors\n";
1045: # set output
1046: $gnuplot_input .= "set output\n";
1047: } elsif ($target eq 'tex') {
1048: $gnuplot_input .= "set term postscript eps $plot{'plotcolor'} solid \"Helvetica\" $pt \n";
1049: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1050: &Apache::lonnet::unescape($filename).".eps\"\n";
1051: }
1052: # cartesian or polar?
1053: if (lc($plot{'plottype'}) eq 'polar') {
1054: $gnuplot_input .= 'set polar'.$/;
1055: } else {
1056: # Assume Cartesian
1057: }
1058: # margin
1059: if (lc($plot{'lmargin'}) ne 'default') {
1060: $gnuplot_input .= 'set lmargin '.$plot{'lmargin'}.$/;
1061: }
1062: if (lc($plot{'rmargin'}) ne 'default') {
1063: $gnuplot_input .= 'set rmargin '.$plot{'rmargin'}.$/;
1064: }
1065: if (lc($plot{'tmargin'}) ne 'default') {
1066: $gnuplot_input .= 'set tmargin '.$plot{'tmargin'}.$/;
1067: }
1068: if (lc($plot{'bmargin'}) ne 'default') {
1069: $gnuplot_input .= 'set bmargin '.$plot{'bmargin'}.$/;
1070: }
1071: # tic scales
1072: $gnuplot_input .= 'set ticscale '.
1073: $plot{'major_ticscale'}.' '.$plot{'minor_ticscale'}.$/;
1074: # grid
1075: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1076: # border
1077: $gnuplot_input .= ($plot{'border'} eq 'on'?
1078: 'set border'.$/ :
1079: 'set noborder'.$/ );
1080: # sampling rate for non-data curves
1081: $gnuplot_input .= "set samples $plot{'samples'}\n";
1082: # title, xlabel, ylabel
1083: # titles
1084: if ($target eq 'tex') {
1085: $gnuplot_input .= "set title \"$title\" font \"Helvetica,".$pt."pt\"\n" if (defined($title)) ;
1086: $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
1087: $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
1088: } else {
1089: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1090: $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
1091: $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
1092: }
1093: # tics
1094: if (%xtics) {
1095: $gnuplot_input .= "set xtics $xtics{'location'} ";
1096: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1097: $gnuplot_input .= "$xtics{'start'}, ";
1098: $gnuplot_input .= "$xtics{'increment'}, ";
1099: $gnuplot_input .= "$xtics{'end'}\n";
1100: if ($xtics{'minorfreq'} != 0) {
1101: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1102: }
1103: }
1104: if (%ytics) {
1105: $gnuplot_input .= "set ytics $ytics{'location'} ";
1106: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1107: $gnuplot_input .= "$ytics{'start'}, ";
1108: $gnuplot_input .= "$ytics{'increment'}, ";
1109: $gnuplot_input .= "$ytics{'end'}\n";
1110: if ($ytics{'minorfreq'} != 0) {
1111: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1112: }
1113: }
1114: # axis
1115: if (%axis) {
1116: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1117: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1118: }
1119: # Key
1120: if (%key) {
1121: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1122: if ($key{'title'} ne '') {
1123: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1124: }
1125: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1126: } else {
1127: $gnuplot_input .= 'set nokey'.$/;
1128: }
1129: # labels
1130: my $label;
1131: foreach $label (@labels) {
1132: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1133: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
1134: if ($target eq 'tex') {
1135: $gnuplot_input .=' font "Helvetica,'.$pt.'pt"' ;
1136: }
1137: $gnuplot_input .= $/;
1138: }
1139: if ($target eq 'tex') {
1140: $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
1141: $gnuplot_input .="\n";
1142: }
1143: # curves
1144: $gnuplot_input .= 'plot ';
1145: for (my $i = 0;$i<=$#curves;$i++) {
1146: $curve = $curves[$i];
1147: $gnuplot_input.= ', ' if ($i > 0);
1148: if (exists($curve->{'function'})) {
1149: $gnuplot_input.=
1150: $curve->{'function'}.' title "'.
1151: $curve->{'name'}.'" with '.
1152: $curve->{'linestyle'};
1153: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1154: if (($curve->{'linestyle'} eq 'points') ||
1155: ($curve->{'linestyle'} eq 'linespoints') ||
1156: ($curve->{'linestyle'} eq 'errorbars') ||
1157: ($curve->{'linestyle'} eq 'xerrorbars') ||
1158: ($curve->{'linestyle'} eq 'yerrorbars') ||
1159: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1160: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1161: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1162: }
1163: } elsif (exists($curve->{'data'})) {
1164: # Store data values in $datatext
1165: my $datatext = '';
1166: # get new filename
1167: my $datafilename = "$tmpdir/$filename.data.$i";
1168: my $fh=Apache::File->new(">$datafilename");
1169: # Compile data
1170: my @Data = @{$curve->{'data'}};
1171: my @Data0 = @{$Data[0]};
1172: for (my $i =0; $i<=$#Data0; $i++) {
1173: my $dataset;
1174: foreach $dataset (@Data) {
1175: $datatext .= $dataset->[$i] . ' ';
1176: }
1177: $datatext .= $/;
1178: }
1179: # write file
1180: print $fh $datatext;
1181: close ($fh);
1182: # generate gnuplot text
1183: $gnuplot_input.= '"'.$datafilename.'" title "'.
1184: $curve->{'name'}.'" with '.
1185: $curve->{'linestyle'};
1186: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1187: if (($curve->{'linestyle'} eq 'points') ||
1188: ($curve->{'linestyle'} eq 'linespoints') ||
1189: ($curve->{'linestyle'} eq 'errorbars') ||
1190: ($curve->{'linestyle'} eq 'xerrorbars') ||
1191: ($curve->{'linestyle'} eq 'yerrorbars') ||
1192: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1193: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1194: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1195: }
1196: }
1197: }
1198: # Write the output to a file.
1199: my $fh=Apache::File->new(">$tmpdir$filename.data");
1200: print $fh $gnuplot_input;
1201: close($fh);
1202: # That's all folks.
1203: return ;
1204: }
1205:
1206: #---------------------------------------------- check_inputs
1207: sub check_inputs {
1208: ## Note: no inputs, no outputs - this acts only on global variables.
1209: ## Make sure we have all the input we need:
1210: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1211: if (! %key ) {} # No key for this plot, thats okay
1212: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1213: if (! defined($title )) {} # No title for this plot, thats okay
1214: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1215: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1216: if ($#labels < 0) { } # No labels for this plot, thats okay
1217: if ($#curves < 0) {
1218: &Apache::lonxml::warning("No curves specified for plot!!!!");
1219: return '';
1220: }
1221: my $curve;
1222: foreach $curve (@curves) {
1223: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1224: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1225: return '';
1226: }
1227: }
1228: }
1229:
1230: #------------------------------------------------ make_edit
1231: sub edit_attributes {
1232: my ($target,$token,$defaults,$keys) = @_;
1233: my ($result,@keys);
1234: if ($keys && ref($keys) eq 'ARRAY') {
1235: @keys = @$keys;
1236: } else {
1237: @keys = sort(keys(%$defaults));
1238: }
1239: foreach my $attr (@keys) {
1240: # append a ' ' to the description if it doesn't have one already.
1241: my $description = $defaults->{$attr}->{'description'};
1242: $description .= ' ' if ($description !~ / $/);
1243: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1244: $result .= &Apache::edit::text_arg
1245: ($description,$attr,$token,
1246: $defaults->{$attr}->{'size'});
1247: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1248: $result .= &Apache::edit::select_or_text_arg
1249: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1250: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1251: $result .= &Apache::edit::select_or_text_arg
1252: ($description,$attr,['on','off'],$token);
1253: }
1254: $result .= '<br />';
1255: }
1256: return $result;
1257: }
1258:
1259:
1260: ###################################################################
1261: ## ##
1262: ## Insertion functions for editing plots ##
1263: ## ##
1264: ###################################################################
1265:
1266: sub insert_gnuplot {
1267: my $result = '';
1268: # plot attributes
1269: $result .= "\n<gnuplot ";
1270: foreach my $attr (keys(%gnuplot_defaults)) {
1271: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1272: }
1273: $result .= ">";
1274: # Add the components (most are commented out for simplicity)
1275: # $result .= &insert_key();
1276: # $result .= &insert_axis();
1277: # $result .= &insert_title();
1278: # $result .= &insert_xlabel();
1279: # $result .= &insert_ylabel();
1280: $result .= &insert_curve();
1281: # close up the <gnuplot>
1282: $result .= "\n</gnuplot>";
1283: return $result;
1284: }
1285:
1286: sub insert_tics {
1287: my $result;
1288: $result .= &insert_xtics() . &insert_ytics;
1289: return $result;
1290: }
1291:
1292: sub insert_xtics {
1293: my $result;
1294: $result .= "\n <xtics ";
1295: foreach my $attr (keys(%tic_defaults)) {
1296: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1297: }
1298: $result .= "/>";
1299: return $result;
1300: }
1301:
1302: sub insert_ytics {
1303: my $result;
1304: $result .= "\n <ytics ";
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_key {
1313: my $result;
1314: $result .= "\n <key ";
1315: foreach my $attr (keys(%key_defaults)) {
1316: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1317: }
1318: $result .= " />";
1319: return $result;
1320: }
1321:
1322: sub insert_axis{
1323: my $result;
1324: $result .= "\n <axis ";
1325: foreach my $attr (keys(%axis_defaults)) {
1326: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1327: }
1328: $result .= " />";
1329: return $result;
1330: }
1331:
1332: sub insert_title { return "\n <title></title>"; }
1333: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1334: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1335:
1336: sub insert_label {
1337: my $result;
1338: $result .= "\n <label ";
1339: foreach my $attr (keys(%label_defaults)) {
1340: $result .= "\n $attr=\"".
1341: $label_defaults{$attr}->{'default'}."\"";
1342: }
1343: $result .= "></label>";
1344: return $result;
1345: }
1346:
1347: sub insert_curve {
1348: my $result;
1349: $result .= "\n <curve ";
1350: foreach my $attr (keys(%curve_defaults)) {
1351: $result .= "\n $attr=\"".
1352: $curve_defaults{$attr}->{'default'}."\"";
1353: }
1354: $result .= " >";
1355: $result .= &insert_data().&insert_data()."\n </curve>";
1356: }
1357:
1358: sub insert_function {
1359: my $result;
1360: $result .= "\n <function></function>";
1361: return $result;
1362: }
1363:
1364: sub insert_data {
1365: my $result;
1366: $result .= "\n <data></data>";
1367: return $result;
1368: }
1369:
1370: ##----------------------------------------------------------------------
1371: 1;
1372: __END__
1373:
1374:
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