1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.105 2005/02/24 22:01:40 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
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:
39: use vars qw/$weboutputformat $versionstring/;
40:
41: BEGIN {
42: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
43: #
44: # Determine the version of GNUPLOT
45: $weboutputformat = 'gif';
46: $versionstring = `gnuplot --version 2>/dev/null`;
47: if ($versionstring =~ /^gnuplot 4/) {
48: $weboutputformat = 'png';
49: }
50: }
51:
52: ##
53: ## Description of data structures:
54: ##
55: ## %plot %key %axis
56: ## --------------------------
57: ## height title color
58: ## width box xmin
59: ## bgcolor pos xmax
60: ## fgcolor ymin
61: ## transparent ymax
62: ## grid
63: ## border
64: ## font
65: ## align
66: ##
67: ## @labels: $labels[$i] = \%label
68: ## %label: text, xpos, ypos, justify
69: ##
70: ## @curves: $curves[$i] = \%curve
71: ## %curve: name, linestyle, ( function | data )
72: ##
73: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
74: ## [y1,y2,y3,y4] ]
75: ##
76:
77: ###################################################################
78: ## ##
79: ## Tests used in checking the validitity of input ##
80: ## ##
81: ###################################################################
82:
83: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
84: # is longer than this, it will be truncated.
85:
86: my %linestyles =
87: (
88: lines => 2, # Maybe this will be used in the future
89: linespoints => 2, # to check on whether or not they have
90: dots => 2, # supplied enough <data></data> fields
91: points => 2, # to use the given line style. But for
92: steps => 2, # now there are more important things
93: fsteps => 2, # for me to deal with.
94: histeps => 2,
95: errorbars => 3,
96: xerrorbars => [3,4],
97: yerrorbars => [3,4],
98: xyerrorbars => [4,6],
99: boxes => 3,
100: vector => 4
101: );
102:
103: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
104: my $real_test =
105: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
106: my $pos_real_test =
107: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
108: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
109: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
110: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
111: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
112: my $linestyle_test = sub {exists($linestyles{$_[0]})};
113: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
114:
115: ###################################################################
116: ## ##
117: ## Attribute metadata ##
118: ## ##
119: ###################################################################
120: my @gnuplot_edit_order =
121: qw/alttag bgcolor fgcolor height width font transparent grid samples
122: border align texwidth texfont plotcolor plottype lmargin rmargin tmargin
123: bmargin major_ticscale minor_ticscale/;
124:
125: my $margin_choices = ['default',0..20];
126:
127: my %gnuplot_defaults =
128: (
129: alttag => {
130: default => 'dynamically generated plot',
131: test => $words_test,
132: description => 'brief description of the plot',
133: edit_type => 'entry',
134: size => '40'
135: },
136: height => {
137: default => 300,
138: test => $int_test,
139: description => 'height of image (pixels)',
140: edit_type => 'entry',
141: size => '10'
142: },
143: width => {
144: default => 400,
145: test => $int_test,
146: description => 'width of image (pixels)',
147: edit_type => 'entry',
148: size => '10'
149: },
150: bgcolor => {
151: default => 'xffffff',
152: test => $color_test,
153: description => 'background color of image (xffffff)',
154: edit_type => 'entry',
155: size => '10'
156: },
157: fgcolor => {
158: default => 'x000000',
159: test => $color_test,
160: description => 'foreground color of image (x000000)',
161: edit_type => 'entry',
162: size => '10'
163: },
164: transparent => {
165: default => 'off',
166: test => $onoff_test,
167: description => 'Transparent image',
168: edit_type => 'onoff'
169: },
170: grid => {
171: default => 'on',
172: test => $onoff_test,
173: description => 'Display grid',
174: edit_type => 'onoff'
175: },
176: border => {
177: default => 'on',
178: test => $onoff_test,
179: description => 'Draw border around plot',
180: edit_type => 'onoff'
181: },
182: font => {
183: default => 'medium',
184: test => $sml_test,
185: description => 'Size of font to use',
186: edit_type => 'choice',
187: choices => ['small','medium','large']
188: },
189: samples => {
190: default => '100',
191: test => $int_test,
192: description => 'Number of samples for non-data plots',
193: edit_type => 'choice',
194: choices => ['100','200','500','1000','2000','5000']
195: },
196: align => {
197: default => 'center',
198: test => sub {$_[0]=~/^(left|right|center)$/},
199: description => 'alignment for image in html',
200: edit_type => 'choice',
201: choices => ['left','right','center']
202: },
203: texwidth => {
204: default => '93',
205: test => $int_test,
206: description => 'Width of plot when printed (mm)',
207: edit_type => 'entry',
208: size => '5'
209: },
210: texfont => {
211: default => '22',
212: test => $int_test,
213: description => 'Font size to use in TeX output (pts):',
214: edit_type => 'choice',
215: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
216: },
217: plotcolor => {
218: default => 'monochrome',
219: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
220: description => 'Color setting for printing:',
221: edit_type => 'choice',
222: choices => [qw/monochrome color colour/],
223: },
224: plottype => {
225: default => 'Cartesian',
226: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
227: description => 'Plot type:',
228: edit_type => 'choice',
229: choices => ['Cartesian','Polar']
230: },
231: lmargin => {
232: default => 'default',
233: test => sub {$_[0]=~/^(default|\d+)$/},
234: description => 'Left margin width (pts):',
235: edit_type => 'choice',
236: choices => $margin_choices,
237: },
238: rmargin => {
239: default => 'default',
240: test => sub {$_[0]=~/^(default|\d+)$/},
241: description => 'Right margin width (pts):',
242: edit_type => 'choice',
243: choices => $margin_choices,
244: },
245: tmargin => {
246: default => 'default',
247: test => sub {$_[0]=~/^(default|\d+)$/},
248: description => 'Top margin width (pts):',
249: edit_type => 'choice',
250: choices => $margin_choices,
251: },
252: bmargin => {
253: default => 'default',
254: test => sub {$_[0]=~/^(default|\d+)$/},
255: description => 'Bottom margin width (pts):',
256: edit_type => 'choice',
257: choices => $margin_choices,
258: },
259: major_ticscale => {
260: default => '1',
261: test => $real_test,
262: description => 'Size of major tic marks (plot coordinates)',
263: edit_type => 'entry',
264: size => '5'
265: },
266: minor_ticscale => {
267: default => '0.5',
268: test => $real_test,
269: description => 'Size of minor tic mark (plot coordinates)',
270: edit_type => 'entry',
271: size => '5'
272: },
273: );
274:
275: my %key_defaults =
276: (
277: title => {
278: default => '',
279: test => $words_test,
280: description => 'Title of key',
281: edit_type => 'entry',
282: size => '40'
283: },
284: box => {
285: default => 'off',
286: test => $onoff_test,
287: description => 'Draw a box around the key?',
288: edit_type => 'onoff'
289: },
290: pos => {
291: default => 'top right',
292: test => $key_pos_test,
293: description => 'position of the key on the plot',
294: edit_type => 'choice',
295: choices => ['top left','top right','bottom left','bottom right',
296: 'outside','below']
297: }
298: );
299:
300: my %label_defaults =
301: (
302: xpos => {
303: default => 0,
304: test => $real_test,
305: description => 'x position of label (graph coordinates)',
306: edit_type => 'entry',
307: size => '10'
308: },
309: ypos => {
310: default => 0,
311: test => $real_test,
312: description => 'y position of label (graph coordinates)',
313: edit_type => 'entry',
314: size => '10'
315: },
316: justify => {
317: default => 'left',
318: test => sub {$_[0]=~/^(left|right|center)$/},
319: description => 'justification of the label text on the plot',
320: edit_type => 'choice',
321: choices => ['left','right','center']
322: }
323: );
324:
325: my @tic_edit_order = ('location','mirror','start','increment','end',
326: 'minorfreq');
327: my %tic_defaults =
328: (
329: location => {
330: default => 'border',
331: test => sub {$_[0]=~/^(border|axis)$/},
332: description => 'Location of major tic marks',
333: edit_type => 'choice',
334: choices => ['border','axis']
335: },
336: mirror => {
337: default => 'on',
338: test => $onoff_test,
339: description => 'mirror tics on opposite axis?',
340: edit_type => 'onoff'
341: },
342: start => {
343: default => '-10.0',
344: test => $real_test,
345: description => 'Start major tics at',
346: edit_type => 'entry',
347: size => '10'
348: },
349: increment => {
350: default => '1.0',
351: test => $real_test,
352: description => 'Place a major tic every',
353: edit_type => 'entry',
354: size => '10'
355: },
356: end => {
357: default => ' 10.0',
358: test => $real_test,
359: description => 'Stop major tics at ',
360: edit_type => 'entry',
361: size => '10'
362: },
363: minorfreq => {
364: default => '0',
365: test => $int_test,
366: description => 'Number of minor tics per major tic mark',
367: edit_type => 'entry',
368: size => '10'
369: },
370: );
371:
372: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
373: my %axis_defaults =
374: (
375: color => {
376: default => 'x000000',
377: test => $color_test,
378: description => 'color of grid lines (x000000)',
379: edit_type => 'entry',
380: size => '10'
381: },
382: xmin => {
383: default => '-10.0',
384: test => $real_test,
385: description => 'minimum x-value shown in plot',
386: edit_type => 'entry',
387: size => '10'
388: },
389: xmax => {
390: default => ' 10.0',
391: test => $real_test,
392: description => 'maximum x-value shown in plot',
393: edit_type => 'entry',
394: size => '10'
395: },
396: ymin => {
397: default => '-10.0',
398: test => $real_test,
399: description => 'minimum y-value shown in plot',
400: edit_type => 'entry',
401: size => '10'
402: },
403: ymax => {
404: default => ' 10.0',
405: test => $real_test,
406: description => 'maximum y-value shown in plot',
407: edit_type => 'entry',
408: size => '10'
409: }
410: );
411:
412: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
413:
414: my %curve_defaults =
415: (
416: color => {
417: default => 'x000000',
418: test => $color_test,
419: description => 'color of curve (x000000)',
420: edit_type => 'entry',
421: size => '10'
422: },
423: name => {
424: default => '',
425: test => $words_test,
426: description => 'name of curve to appear in key',
427: edit_type => 'entry',
428: size => '20'
429: },
430: linestyle => {
431: default => 'lines',
432: test => $linestyle_test,
433: description => 'Line style',
434: edit_type => 'choice',
435: choices => [keys(%linestyles)]
436: },
437: # gnuplots term=gif driver does not handle linewidth :(
438: # linewidth => {
439: # default => 1,
440: # test => $int_test,
441: # description => 'Line width (may not apply to all line styles)',
442: # edit_type => 'choice',
443: # choices => [1,2,3,4,5,6,7,8,9,10]
444: # },
445: pointsize => {
446: default => 1,
447: test => $pos_real_test,
448: description => 'point size (may not apply to all line styles)',
449: edit_type => 'entry',
450: size => '5'
451: },
452: pointtype => {
453: default => 1,
454: test => $int_test,
455: description => 'point type (may not apply to all line styles)',
456: edit_type => 'choice',
457: choices => [0,1,2,3,4,5,6]
458: }
459: );
460:
461: ###################################################################
462: ## ##
463: ## parsing and edit rendering ##
464: ## ##
465: ###################################################################
466: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
467:
468: sub start_gnuplot {
469: undef(%plot); undef(%key); undef(%axis);
470: undef($title); undef($xlabel); undef($ylabel);
471: undef(@labels); undef(@curves);
472: undef(%xtics); undef(%ytics);
473: #
474: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
475: my $result='';
476: &Apache::lonxml::register('Apache::lonplot',
477: ('title','xlabel','ylabel','key','axis','label','curve',
478: 'xtics','ytics'));
479: push (@Apache::lonxml::namespace,'lonplot');
480: if ($target eq 'web' || $target eq 'tex') {
481: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
482: $tagstack->[-1]);
483: } elsif ($target eq 'edit') {
484: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
485: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
486: \@gnuplot_edit_order);
487: } elsif ($target eq 'modified') {
488: my $constructtag=&Apache::edit::get_new_args
489: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
490: if ($constructtag) {
491: $result = &Apache::edit::rebuild_tag($token);
492: }
493: }
494: return $result;
495: }
496:
497: sub end_gnuplot {
498: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
499: pop @Apache::lonxml::namespace;
500: &Apache::lonxml::deregister('Apache::lonplot',
501: ('title','xlabel','ylabel','key','axis','label','curve'));
502: my $result = '';
503: my $randnumber;
504: # need to call rand everytime start_script would evaluate, as the
505: # safe space rand number generator and the global rand generator
506: # are not separate
507: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
508: $target eq 'answer') {
509: $randnumber=int(rand(1000));
510: }
511: if ($target eq 'web' || $target eq 'tex') {
512: &check_inputs(); # Make sure we have all the data we need
513: ##
514: ## Determine filename
515: my $tmpdir = '/home/httpd/perl/tmp/';
516: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
517: '_'.time.'_'.$$.$randnumber.'_plot';
518: ## Write the plot description to the file
519: &write_gnuplot_file($tmpdir,$filename,$target);
520: $filename = &Apache::lonnet::escape($filename);
521: ## return image tag for the plot
522: if ($target eq 'web') {
523: $result .= <<"ENDIMAGE";
524: <img src = "/cgi-bin/plot.gif?file=$filename.data&output=$weboutputformat"
525: width = "$plot{'width'}"
526: height = "$plot{'height'}"
527: align = "$plot{'align'}"
528: alt = "$plot{'alttag'}" />
529: ENDIMAGE
530: } elsif ($target eq 'tex') {
531: #might be inside the safe space, register the URL for later
532: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
533: $result = '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics[width='.$plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.eps}';
534: }
535: } elsif ($target eq 'edit') {
536: $result.=&Apache::edit::tag_end($target,$token);
537: }
538: return $result;
539: }
540:
541:
542: ##--------------------------------------------------------------- xtics
543: sub start_xtics {
544: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
545: my $result='';
546: if ($target eq 'web' || $target eq 'tex') {
547: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
548: $tagstack->[-1]);
549: } elsif ($target eq 'edit') {
550: $result .= &Apache::edit::tag_start($target,$token,'xtics');
551: $result .= &edit_attributes($target,$token,\%tic_defaults,
552: \@tic_edit_order);
553: } elsif ($target eq 'modified') {
554: my $constructtag=&Apache::edit::get_new_args
555: ($token,$parstack,$safeeval,keys(%tic_defaults));
556: if ($constructtag) {
557: $result = &Apache::edit::rebuild_tag($token);
558: }
559: }
560: return $result;
561: }
562:
563: sub end_xtics {
564: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
565: my $result = '';
566: if ($target eq 'web' || $target eq 'tex') {
567: } elsif ($target eq 'edit') {
568: $result.=&Apache::edit::tag_end($target,$token);
569: }
570: return $result;
571: }
572:
573: ##--------------------------------------------------------------- ytics
574: sub start_ytics {
575: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
576: my $result='';
577: if ($target eq 'web' || $target eq 'tex') {
578: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
579: $tagstack->[-1]);
580: } elsif ($target eq 'edit') {
581: $result .= &Apache::edit::tag_start($target,$token,'ytics');
582: $result .= &edit_attributes($target,$token,\%tic_defaults,
583: \@tic_edit_order);
584: } elsif ($target eq 'modified') {
585: my $constructtag=&Apache::edit::get_new_args
586: ($token,$parstack,$safeeval,keys(%tic_defaults));
587: if ($constructtag) {
588: $result = &Apache::edit::rebuild_tag($token);
589: }
590: }
591: return $result;
592: }
593:
594: sub end_ytics {
595: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
596: my $result = '';
597: if ($target eq 'web' || $target eq 'tex') {
598: } elsif ($target eq 'edit') {
599: $result.=&Apache::edit::tag_end($target,$token);
600: }
601: return $result;
602: }
603:
604:
605: ##----------------------------------------------------------------- key
606: sub start_key {
607: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
608: my $result='';
609: if ($target eq 'web' || $target eq 'tex') {
610: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
611: $tagstack->[-1]);
612: } elsif ($target eq 'edit') {
613: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
614: $result .= &edit_attributes($target,$token,\%key_defaults);
615: } elsif ($target eq 'modified') {
616: my $constructtag=&Apache::edit::get_new_args
617: ($token,$parstack,$safeeval,keys(%key_defaults));
618: if ($constructtag) {
619: $result = &Apache::edit::rebuild_tag($token);
620: }
621: }
622: return $result;
623: }
624:
625: sub end_key {
626: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
627: my $result = '';
628: if ($target eq 'web' || $target eq 'tex') {
629: } elsif ($target eq 'edit') {
630: $result.=&Apache::edit::tag_end($target,$token);
631: }
632: return $result;
633: }
634:
635: ##------------------------------------------------------------------- title
636: sub start_title {
637: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
638: my $result='';
639: if ($target eq 'web' || $target eq 'tex') {
640: $title = &Apache::lonxml::get_all_text("/title",$parser);
641: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
642: $title =~ s/\n/ /g;
643: if (length($title) > $max_str_len) {
644: $title = substr($title,0,$max_str_len);
645: }
646: } elsif ($target eq 'edit') {
647: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
648: my $text=&Apache::lonxml::get_all_text("/title",$parser);
649: $result.=&Apache::edit::end_row().
650: &Apache::edit::start_spanning_row().
651: &Apache::edit::editline('',$text,'',60);
652: } elsif ($target eq 'modified') {
653: $result.=&Apache::edit::rebuild_tag($token);
654: $result.=&Apache::edit::modifiedfield("/title",$parser);
655: }
656: return $result;
657: }
658:
659: sub end_title {
660: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
661: my $result = '';
662: if ($target eq 'web' || $target eq 'tex') {
663: } elsif ($target eq 'edit') {
664: $result.=&Apache::edit::tag_end($target,$token);
665: }
666: return $result;
667: }
668: ##------------------------------------------------------------------- xlabel
669: sub start_xlabel {
670: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
671: my $result='';
672: if ($target eq 'web' || $target eq 'tex') {
673: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
674: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
675: $xlabel =~ s/\n/ /g;
676: if (length($xlabel) > $max_str_len) {
677: $xlabel = substr($xlabel,0,$max_str_len);
678: }
679: } elsif ($target eq 'edit') {
680: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
681: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
682: $result.=&Apache::edit::end_row().
683: &Apache::edit::start_spanning_row().
684: &Apache::edit::editline('',$text,'',60);
685: } elsif ($target eq 'modified') {
686: $result.=&Apache::edit::rebuild_tag($token);
687: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
688: }
689: return $result;
690: }
691:
692: sub end_xlabel {
693: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
694: my $result = '';
695: if ($target eq 'web' || $target eq 'tex') {
696: } elsif ($target eq 'edit') {
697: $result.=&Apache::edit::tag_end($target,$token);
698: }
699: return $result;
700: }
701:
702: ##------------------------------------------------------------------- ylabel
703: sub start_ylabel {
704: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
705: my $result='';
706: if ($target eq 'web' || $target eq 'tex') {
707: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
708: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
709: $ylabel =~ s/\n/ /g;
710: if (length($ylabel) > $max_str_len) {
711: $ylabel = substr($ylabel,0,$max_str_len);
712: }
713: } elsif ($target eq 'edit') {
714: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
715: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
716: $result .= &Apache::edit::end_row().
717: &Apache::edit::start_spanning_row().
718: &Apache::edit::editline('',$text,'',60);
719: } elsif ($target eq 'modified') {
720: $result.=&Apache::edit::rebuild_tag($token);
721: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
722: }
723: return $result;
724: }
725:
726: sub end_ylabel {
727: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
728: my $result = '';
729: if ($target eq 'web' || $target eq 'tex') {
730: } elsif ($target eq 'edit') {
731: $result.=&Apache::edit::tag_end($target,$token);
732: }
733: return $result;
734: }
735:
736: ##------------------------------------------------------------------- label
737: sub start_label {
738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
739: my $result='';
740: if ($target eq 'web' || $target eq 'tex') {
741: my %label;
742: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
743: $tagstack->[-1]);
744: my $text = &Apache::lonxml::get_all_text("/label",$parser);
745: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
746: $text =~ s/\n/ /g;
747: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
748: $label{'text'} = $text;
749: push(@labels,\%label);
750: } elsif ($target eq 'edit') {
751: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
752: $result .= &edit_attributes($target,$token,\%label_defaults);
753: my $text = &Apache::lonxml::get_all_text("/label",$parser);
754: $result .= &Apache::edit::end_row().
755: &Apache::edit::start_spanning_row().
756: &Apache::edit::editline('',$text,'',60);
757: } elsif ($target eq 'modified') {
758: &Apache::edit::get_new_args
759: ($token,$parstack,$safeeval,keys(%label_defaults));
760: $result.=&Apache::edit::rebuild_tag($token);
761: $result.=&Apache::edit::modifiedfield("/label",$parser);
762: }
763: return $result;
764: }
765:
766: sub end_label {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
768: my $result = '';
769: if ($target eq 'web' || $target eq 'tex') {
770: } elsif ($target eq 'edit') {
771: $result.=&Apache::edit::tag_end($target,$token);
772: }
773: return $result;
774: }
775:
776: ##------------------------------------------------------------------- curve
777: sub start_curve {
778: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
779: my $result='';
780: &Apache::lonxml::register('Apache::lonplot',('function','data'));
781: push (@Apache::lonxml::namespace,'curve');
782: if ($target eq 'web' || $target eq 'tex') {
783: my %curve;
784: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
785: $tagstack->[-1]);
786: push (@curves,\%curve);
787: } elsif ($target eq 'edit') {
788: $result .= &Apache::edit::tag_start($target,$token,'Curve');
789: $result .= &edit_attributes($target,$token,\%curve_defaults,
790: \@curve_edit_order);
791: } elsif ($target eq 'modified') {
792: my $constructtag=&Apache::edit::get_new_args
793: ($token,$parstack,$safeeval,keys(%curve_defaults));
794: if ($constructtag) {
795: $result = &Apache::edit::rebuild_tag($token);
796: $result.= &Apache::edit::handle_insert();
797: }
798: }
799: return $result;
800: }
801:
802: sub end_curve {
803: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
804: my $result = '';
805: pop @Apache::lonxml::namespace;
806: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
807: if ($target eq 'web' || $target eq 'tex') {
808: } elsif ($target eq 'edit') {
809: $result.=&Apache::edit::tag_end($target,$token);
810: }
811: return $result;
812: }
813:
814: ##------------------------------------------------------------ curve function
815: sub start_function {
816: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
817: my $result='';
818: if ($target eq 'web' || $target eq 'tex') {
819: if (exists($curves[-1]->{'data'})) {
820: &Apache::lonxml::warning
821: ('Use of the <b>curve function</b> tag precludes use of '.
822: ' the <b>curve data</b> tag. '.
823: 'The curve data tag will be omitted in favor of the '.
824: 'curve function declaration.');
825: delete $curves[-1]->{'data'} ;
826: }
827: my $function = &Apache::lonxml::get_all_text("/function",$parser);
828: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
829: $curves[-1]->{'function'} = $function;
830: } elsif ($target eq 'edit') {
831: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
832: my $text = &Apache::lonxml::get_all_text("/function",$parser);
833: $result .= &Apache::edit::end_row().
834: &Apache::edit::start_spanning_row().
835: &Apache::edit::editline('',$text,'',60);
836: } elsif ($target eq 'modified') {
837: $result.=&Apache::edit::rebuild_tag($token);
838: $result.=&Apache::edit::modifiedfield("/function",$parser);
839: }
840: return $result;
841: }
842:
843: sub end_function {
844: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
845: my $result = '';
846: if ($target eq 'web' || $target eq 'tex') {
847: } elsif ($target eq 'edit') {
848: $result .= &Apache::edit::end_table();
849: }
850: return $result;
851: }
852:
853: ##------------------------------------------------------------ curve data
854: sub start_data {
855: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
856: my $result='';
857: if ($target eq 'web' || $target eq 'tex') {
858: if (exists($curves[-1]->{'function'})) {
859: &Apache::lonxml::warning
860: ('Use of the <b>curve function</b> tag precludes use of '.
861: ' the <b>curve data</b> tag. '.
862: 'The curve function tag will be omitted in favor of the '.
863: 'curve data declaration.');
864: delete($curves[-1]->{'function'});
865: }
866: my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
867: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
868: # Deal with cases where we're given an array...
869: if ($datatext =~ /^\@/) {
870: $datatext = &Apache::run::run('return "'.$datatext.'"',
871: $safeeval,1);
872: }
873: $datatext =~ s/\s+/ /g;
874: # Need to do some error checking on the @data array -
875: # make sure it's all numbers and make sure each array
876: # is of the same length.
877: my @data;
878: if ($datatext =~ /,/) { # comma deliminated
879: @data = split /,/,$datatext;
880: } else { # Assume it's space separated.
881: @data = split / /,$datatext;
882: }
883: for (my $i=0;$i<=$#data;$i++) {
884: # Check that it's non-empty
885: if (! defined($data[$i])) {
886: &Apache::lonxml::warning(
887: 'undefined curve data value. Replacing with '.
888: ' pi/e = 1.15572734979092');
889: $data[$i] = 1.15572734979092;
890: }
891: # Check that it's a number
892: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
893: &Apache::lonxml::warning(
894: 'Bad curve data value of '.$data[$i].' Replacing with '.
895: ' pi/e = 1.15572734979092');
896: $data[$i] = 1.15572734979092;
897: }
898: }
899: # complain if the number of data points is not the same as
900: # in previous sets of data.
901: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
902: &Apache::lonxml::warning
903: ('Number of data points is not consistent with previous '.
904: 'number of data points');
905: }
906: push @{$curves[-1]->{'data'}},\@data;
907: } elsif ($target eq 'edit') {
908: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
909: my $text = &Apache::lonxml::get_all_text("/data",$parser);
910: $result .= &Apache::edit::end_row().
911: &Apache::edit::start_spanning_row().
912: &Apache::edit::editline('',$text,'',60);
913: } elsif ($target eq 'modified') {
914: $result.=&Apache::edit::rebuild_tag($token);
915: $result.=&Apache::edit::modifiedfield("/data",$parser);
916: }
917: return $result;
918: }
919:
920: sub end_data {
921: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
922: my $result = '';
923: if ($target eq 'web' || $target eq 'tex') {
924: } elsif ($target eq 'edit') {
925: $result .= &Apache::edit::end_table();
926: }
927: return $result;
928: }
929:
930: ##------------------------------------------------------------------- axis
931: sub start_axis {
932: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
933: my $result='';
934: if ($target eq 'web' || $target eq 'tex') {
935: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
936: $tagstack->[-1]);
937: } elsif ($target eq 'edit') {
938: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
939: $result .= &edit_attributes($target,$token,\%axis_defaults,
940: \@axis_edit_order);
941: } elsif ($target eq 'modified') {
942: my $constructtag=&Apache::edit::get_new_args
943: ($token,$parstack,$safeeval,keys(%axis_defaults));
944: if ($constructtag) {
945: $result = &Apache::edit::rebuild_tag($token);
946: }
947: }
948: return $result;
949: }
950:
951: sub end_axis {
952: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
953: my $result = '';
954: if ($target eq 'web' || $target eq 'tex') {
955: } elsif ($target eq 'edit') {
956: $result.=&Apache::edit::tag_end($target,$token);
957: } elsif ($target eq 'modified') {
958: }
959: return $result;
960: }
961:
962: ###################################################################
963: ## ##
964: ## Utility Functions ##
965: ## ##
966: ###################################################################
967:
968: ##----------------------------------------------------------- set_defaults
969: sub set_defaults {
970: my ($var,$defaults) = @_;
971: my $key;
972: foreach $key (keys(%$defaults)) {
973: $var->{$key} = $defaults->{$key}->{'default'};
974: }
975: }
976:
977: ##------------------------------------------------------------------- misc
978: sub get_attributes{
979: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
980: foreach my $attr (keys(%{$defaults})) {
981: if ($attr eq 'texwidth' || $attr eq 'texfont') {
982: $values->{$attr} =
983: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
984: } else {
985: $values->{$attr} =
986: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
987: }
988: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
989: $values->{$attr} = $defaults->{$attr}->{'default'};
990: next;
991: }
992: my $test = $defaults->{$attr}->{'test'};
993: if (! &$test($values->{$attr})) {
994: &Apache::lonxml::warning
995: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
996: .$defaults->{$attr}->{'default'} );
997: $values->{$attr} = $defaults->{$attr}->{'default'};
998: }
999: }
1000: return ;
1001: }
1002:
1003: ##------------------------------------------------------- write_gnuplot_file
1004: sub write_gnuplot_file {
1005: my ($tmpdir,$filename,$target)= @_;
1006: my $gnuplot_input = '';
1007: my $curve;
1008: my $pt = $plot{'texfont'};
1009: #
1010: # Check to be sure we do not have any empty curves
1011: my @curvescopy;
1012: foreach my $curve (@curves) {
1013: if (exists($curve->{'function'})) {
1014: if ($curve->{'function'} !~ /^\s*$/) {
1015: push(@curvescopy,$curve);
1016: }
1017: } elsif (exists($curve->{'data'})) {
1018: foreach my $data (@{$curve->{'data'}}) {
1019: if (scalar(@$data) > 0) {
1020: push(@curvescopy,$curve);
1021: last;
1022: }
1023: }
1024: }
1025: }
1026: @curves = @curvescopy;
1027: # Collect all the colors
1028: my @Colors;
1029: push @Colors, $plot{'bgcolor'};
1030: push @Colors, $plot{'fgcolor'};
1031: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1032: foreach $curve (@curves) {
1033: push @Colors, ($curve->{'color'} ne '' ?
1034: $curve->{'color'} :
1035: $plot{'fgcolor'} );
1036: }
1037: # set term
1038: if ($target eq 'web') {
1039: $gnuplot_input .= 'set term '.$weboutputformat .' ';
1040: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
1041: $gnuplot_input .= $plot{'font'} . ' ';
1042: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1043: $gnuplot_input .= "@Colors\n";
1044: # set output
1045: $gnuplot_input .= "set output\n";
1046: } elsif ($target eq 'tex') {
1047: $gnuplot_input .= "set term postscript eps $plot{'plotcolor'} solid \"Helvetica\" $pt \n";
1048: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1049: &Apache::lonnet::unescape($filename).".eps\"\n";
1050: }
1051: # cartesian or polar?
1052: if (lc($plot{'plottype'}) eq 'polar') {
1053: $gnuplot_input .= 'set polar'.$/;
1054: } else {
1055: # Assume Cartesian
1056: }
1057: # margin
1058: if (lc($plot{'lmargin'}) ne 'default') {
1059: $gnuplot_input .= 'set lmargin '.$plot{'lmargin'}.$/;
1060: }
1061: if (lc($plot{'rmargin'}) ne 'default') {
1062: $gnuplot_input .= 'set rmargin '.$plot{'rmargin'}.$/;
1063: }
1064: if (lc($plot{'tmargin'}) ne 'default') {
1065: $gnuplot_input .= 'set tmargin '.$plot{'tmargin'}.$/;
1066: }
1067: if (lc($plot{'bmargin'}) ne 'default') {
1068: $gnuplot_input .= 'set bmargin '.$plot{'bmargin'}.$/;
1069: }
1070: # tic scales
1071: $gnuplot_input .= 'set ticscale '.
1072: $plot{'major_ticscale'}.' '.$plot{'minor_ticscale'}.$/;
1073: # grid
1074: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1075: # border
1076: $gnuplot_input .= ($plot{'border'} eq 'on'?
1077: 'set border'.$/ :
1078: 'set noborder'.$/ );
1079: # sampling rate for non-data curves
1080: $gnuplot_input .= "set samples $plot{'samples'}\n";
1081: # title, xlabel, ylabel
1082: # titles
1083: if ($target eq 'tex') {
1084: $gnuplot_input .= "set title \"$title\" font \"Helvetica,".$pt."pt\"\n" if (defined($title)) ;
1085: $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
1086: $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
1087: } else {
1088: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1089: $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
1090: $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
1091: }
1092: # tics
1093: if (%xtics) {
1094: $gnuplot_input .= "set xtics $xtics{'location'} ";
1095: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1096: $gnuplot_input .= "$xtics{'start'}, ";
1097: $gnuplot_input .= "$xtics{'increment'}, ";
1098: $gnuplot_input .= "$xtics{'end'}\n";
1099: if ($xtics{'minorfreq'} != 0) {
1100: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1101: }
1102: }
1103: if (%ytics) {
1104: $gnuplot_input .= "set ytics $ytics{'location'} ";
1105: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1106: $gnuplot_input .= "$ytics{'start'}, ";
1107: $gnuplot_input .= "$ytics{'increment'}, ";
1108: $gnuplot_input .= "$ytics{'end'}\n";
1109: if ($ytics{'minorfreq'} != 0) {
1110: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1111: }
1112: }
1113: # axis
1114: if (%axis) {
1115: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1116: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1117: }
1118: # Key
1119: if (%key) {
1120: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1121: if ($key{'title'} ne '') {
1122: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1123: }
1124: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1125: } else {
1126: $gnuplot_input .= 'set nokey'.$/;
1127: }
1128: # labels
1129: my $label;
1130: foreach $label (@labels) {
1131: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1132: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
1133: if ($target eq 'tex') {
1134: $gnuplot_input .=' font "Helvetica,'.$pt.'pt"' ;
1135: }
1136: $gnuplot_input .= $/;
1137: }
1138: if ($target eq 'tex') {
1139: $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
1140: $gnuplot_input .="\n";
1141: }
1142: # curves
1143: $gnuplot_input .= 'plot ';
1144: for (my $i = 0;$i<=$#curves;$i++) {
1145: $curve = $curves[$i];
1146: $gnuplot_input.= ', ' if ($i > 0);
1147: if (exists($curve->{'function'})) {
1148: $gnuplot_input.=
1149: $curve->{'function'}.' title "'.
1150: $curve->{'name'}.'" with '.
1151: $curve->{'linestyle'};
1152: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1153: if (($curve->{'linestyle'} eq 'points') ||
1154: ($curve->{'linestyle'} eq 'linespoints') ||
1155: ($curve->{'linestyle'} eq 'errorbars') ||
1156: ($curve->{'linestyle'} eq 'xerrorbars') ||
1157: ($curve->{'linestyle'} eq 'yerrorbars') ||
1158: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1159: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1160: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1161: }
1162: } elsif (exists($curve->{'data'})) {
1163: # Store data values in $datatext
1164: my $datatext = '';
1165: # get new filename
1166: my $datafilename = "$tmpdir/$filename.data.$i";
1167: my $fh=Apache::File->new(">$datafilename");
1168: # Compile data
1169: my @Data = @{$curve->{'data'}};
1170: my @Data0 = @{$Data[0]};
1171: for (my $i =0; $i<=$#Data0; $i++) {
1172: my $dataset;
1173: foreach $dataset (@Data) {
1174: $datatext .= $dataset->[$i] . ' ';
1175: }
1176: $datatext .= $/;
1177: }
1178: # write file
1179: print $fh $datatext;
1180: close ($fh);
1181: # generate gnuplot text
1182: $gnuplot_input.= '"'.$datafilename.'" title "'.
1183: $curve->{'name'}.'" with '.
1184: $curve->{'linestyle'};
1185: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1186: if (($curve->{'linestyle'} eq 'points') ||
1187: ($curve->{'linestyle'} eq 'linespoints') ||
1188: ($curve->{'linestyle'} eq 'errorbars') ||
1189: ($curve->{'linestyle'} eq 'xerrorbars') ||
1190: ($curve->{'linestyle'} eq 'yerrorbars') ||
1191: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1192: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1193: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1194: }
1195: }
1196: }
1197: # Write the output to a file.
1198: my $fh=Apache::File->new(">$tmpdir$filename.data");
1199: print $fh $gnuplot_input;
1200: close($fh);
1201: # That's all folks.
1202: return ;
1203: }
1204:
1205: #---------------------------------------------- check_inputs
1206: sub check_inputs {
1207: ## Note: no inputs, no outputs - this acts only on global variables.
1208: ## Make sure we have all the input we need:
1209: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1210: if (! %key ) {} # No key for this plot, thats okay
1211: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1212: if (! defined($title )) {} # No title for this plot, thats okay
1213: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1214: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1215: if ($#labels < 0) { } # No labels for this plot, thats okay
1216: if ($#curves < 0) {
1217: &Apache::lonxml::warning("No curves specified for plot!!!!");
1218: return '';
1219: }
1220: my $curve;
1221: foreach $curve (@curves) {
1222: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1223: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1224: return '';
1225: }
1226: }
1227: }
1228:
1229: #------------------------------------------------ make_edit
1230: sub edit_attributes {
1231: my ($target,$token,$defaults,$keys) = @_;
1232: my ($result,@keys);
1233: if ($keys && ref($keys) eq 'ARRAY') {
1234: @keys = @$keys;
1235: } else {
1236: @keys = sort(keys(%$defaults));
1237: }
1238: foreach my $attr (@keys) {
1239: # append a ' ' to the description if it doesn't have one already.
1240: my $description = $defaults->{$attr}->{'description'};
1241: $description .= ' ' if ($description !~ / $/);
1242: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1243: $result .= &Apache::edit::text_arg
1244: ($description,$attr,$token,
1245: $defaults->{$attr}->{'size'});
1246: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1247: $result .= &Apache::edit::select_or_text_arg
1248: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1249: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1250: $result .= &Apache::edit::select_or_text_arg
1251: ($description,$attr,['on','off'],$token);
1252: }
1253: $result .= '<br />';
1254: }
1255: return $result;
1256: }
1257:
1258:
1259: ###################################################################
1260: ## ##
1261: ## Insertion functions for editing plots ##
1262: ## ##
1263: ###################################################################
1264:
1265: sub insert_gnuplot {
1266: my $result = '';
1267: # plot attributes
1268: $result .= "\n<gnuplot ";
1269: foreach my $attr (keys(%gnuplot_defaults)) {
1270: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1271: }
1272: $result .= ">";
1273: # Add the components (most are commented out for simplicity)
1274: # $result .= &insert_key();
1275: # $result .= &insert_axis();
1276: # $result .= &insert_title();
1277: # $result .= &insert_xlabel();
1278: # $result .= &insert_ylabel();
1279: $result .= &insert_curve();
1280: # close up the <gnuplot>
1281: $result .= "\n</gnuplot>";
1282: return $result;
1283: }
1284:
1285: sub insert_tics {
1286: my $result;
1287: $result .= &insert_xtics() . &insert_ytics;
1288: return $result;
1289: }
1290:
1291: sub insert_xtics {
1292: my $result;
1293: $result .= "\n <xtics ";
1294: foreach my $attr (keys(%tic_defaults)) {
1295: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1296: }
1297: $result .= "/>";
1298: return $result;
1299: }
1300:
1301: sub insert_ytics {
1302: my $result;
1303: $result .= "\n <ytics ";
1304: foreach my $attr (keys(%tic_defaults)) {
1305: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1306: }
1307: $result .= "/>";
1308: return $result;
1309: }
1310:
1311: sub insert_key {
1312: my $result;
1313: $result .= "\n <key ";
1314: foreach my $attr (keys(%key_defaults)) {
1315: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1316: }
1317: $result .= " />";
1318: return $result;
1319: }
1320:
1321: sub insert_axis{
1322: my $result;
1323: $result .= "\n <axis ";
1324: foreach my $attr (keys(%axis_defaults)) {
1325: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1326: }
1327: $result .= " />";
1328: return $result;
1329: }
1330:
1331: sub insert_title { return "\n <title></title>"; }
1332: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1333: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1334:
1335: sub insert_label {
1336: my $result;
1337: $result .= "\n <label ";
1338: foreach my $attr (keys(%label_defaults)) {
1339: $result .= "\n $attr=\"".
1340: $label_defaults{$attr}->{'default'}."\"";
1341: }
1342: $result .= "></label>";
1343: return $result;
1344: }
1345:
1346: sub insert_curve {
1347: my $result;
1348: $result .= "\n <curve ";
1349: foreach my $attr (keys(%curve_defaults)) {
1350: $result .= "\n $attr=\"".
1351: $curve_defaults{$attr}->{'default'}."\"";
1352: }
1353: $result .= " >";
1354: $result .= &insert_data().&insert_data()."\n </curve>";
1355: }
1356:
1357: sub insert_function {
1358: my $result;
1359: $result .= "\n <function></function>";
1360: return $result;
1361: }
1362:
1363: sub insert_data {
1364: my $result;
1365: $result .= "\n <data></data>";
1366: return $result;
1367: }
1368:
1369: ##----------------------------------------------------------------------
1370: 1;
1371: __END__
1372:
1373:
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