1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.115 2007/02/21 20:34:58 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: use lib '/home/httpd/lib/perl/';
40: use LONCAPA;
41:
42:
43: use vars qw/$weboutputformat $versionstring/;
44:
45:
46:
47: BEGIN {
48: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
49: #
50: # Determine the version of GNUPLOT
51: $weboutputformat = 'gif';
52: $versionstring = `gnuplot --version 2>/dev/null`;
53: if ($versionstring =~ /^gnuplot 4/) {
54: $weboutputformat = 'png';
55: }
56:
57: }
58:
59:
60: ##
61: ## Description of data structures:
62: ##
63: ## %plot %key %axis
64: ## --------------------------
65: ## height title color
66: ## width box xmin
67: ## bgcolor pos xmax
68: ## fgcolor ymin
69: ## transparent ymax
70: ## grid
71: ## border
72: ## font
73: ## align
74: ##
75: ## @labels: $labels[$i] = \%label
76: ## %label: text, xpos, ypos, justify
77: ##
78: ## @curves: $curves[$i] = \%curve
79: ## %curve: name, linestyle, ( function | data )
80: ##
81: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
82: ## [y1,y2,y3,y4] ]
83: ##
84:
85: ###################################################################
86: ## ##
87: ## Tests used in checking the validitity of input ##
88: ## ##
89: ###################################################################
90:
91: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
92: # is longer than this, it will be truncated.
93:
94: my %linestyles =
95: (
96: lines => 2, # Maybe this will be used in the future
97: linespoints => 2, # to check on whether or not they have
98: dots => 2, # supplied enough <data></data> fields
99: points => 2, # to use the given line style. But for
100: steps => 2, # now there are more important things
101: fsteps => 2, # for me to deal with.
102: histeps => 2,
103: errorbars => 3,
104: xerrorbars => [3,4],
105: yerrorbars => [3,4],
106: xyerrorbars => [4,6],
107: boxes => 3,
108: filledcurves => 2,
109: vector => 4
110: );
111:
112: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
113: my $real_test =
114: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
115: my $pos_real_test =
116: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
117: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
118: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
119: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
120: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
121: my $linestyle_test = sub {exists($linestyles{$_[0]})};
122: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
123:
124: ###################################################################
125: ## ##
126: ## Attribute metadata ##
127: ## ##
128: ###################################################################
129: my @gnuplot_edit_order =
130: qw/alttag bgcolor fgcolor height width font transparent grid samples
131: border align texwidth texfont plotcolor plottype gridtype lmargin rmargin
132: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
133: pattern solid/;
134:
135: my $margin_choices = ['default',0..20];
136:
137: my %gnuplot_defaults =
138: (
139: alttag => {
140: default => 'dynamically generated plot',
141: test => $words_test,
142: description => 'brief description of the plot',
143: edit_type => 'entry',
144: size => '40'
145: },
146: height => {
147: default => 300,
148: test => $int_test,
149: description => 'height of image (pixels)',
150: edit_type => 'entry',
151: size => '10'
152: },
153: width => {
154: default => 400,
155: test => $int_test,
156: description => 'width of image (pixels)',
157: edit_type => 'entry',
158: size => '10'
159: },
160: bgcolor => {
161: default => 'xffffff',
162: test => $color_test,
163: description => 'background color of image (xffffff)',
164: edit_type => 'entry',
165: size => '10'
166: },
167: fgcolor => {
168: default => 'x000000',
169: test => $color_test,
170: description => 'foreground color of image (x000000)',
171: edit_type => 'entry',
172: size => '10'
173: },
174: transparent => {
175: default => 'off',
176: test => $onoff_test,
177: description => 'Transparent image',
178: edit_type => 'onoff'
179: },
180: grid => {
181: default => 'on',
182: test => $onoff_test,
183: description => 'Display grid',
184: edit_type => 'onoff'
185: },
186: gridlayer => {
187: default => 'off',
188: test => $onoff_test,
189: description => 'Display grid front layer over filled boxes or filled curves',
190: edit_type => 'onoff'
191: },
192: box_border => {
193: default => 'noborder',
194: test => sub {$_[0]=~/^(noborder|border)$/},
195: description => 'Draw border for boxes',
196: edit_type => 'choice',
197: choices => ['border','noborder']
198: },
199: border => {
200: default => 'on',
201: test => $onoff_test,
202: description => 'Draw border around plot',
203: edit_type => 'onoff'
204: },
205: font => {
206: default => 'medium',
207: test => $sml_test,
208: description => 'Size of font to use',
209: edit_type => 'choice',
210: choices => ['small','medium','large']
211: },
212: samples => {
213: default => '100',
214: test => $int_test,
215: description => 'Number of samples for non-data plots',
216: edit_type => 'choice',
217: choices => ['100','200','500','1000','2000','5000']
218: },
219: align => {
220: default => 'center',
221: test => sub {$_[0]=~/^(left|right|center)$/},
222: description => 'alignment for image in html',
223: edit_type => 'choice',
224: choices => ['left','right','center']
225: },
226: texwidth => {
227: default => '93',
228: test => $int_test,
229: description => 'Width of plot when printed (mm)',
230: edit_type => 'entry',
231: size => '5'
232: },
233: texfont => {
234: default => '22',
235: test => $int_test,
236: description => 'Font size to use in TeX output (pts):',
237: edit_type => 'choice',
238: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
239: },
240: plotcolor => {
241: default => 'monochrome',
242: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
243: description => 'Color setting for printing:',
244: edit_type => 'choice',
245: choices => [qw/monochrome color colour/],
246: },
247: pattern => {
248: default => '',
249: test => $int_test,
250: description => 'pattern value for boxes:',
251: edit_type => 'choice',
252: choices => [0,1,2,3,4,5,6]
253: },
254: solid => {
255: default => 0,
256: test => $real_test,
257: description => 'The density of fill style for boxes',
258: edit_type => 'entry',
259: size => '5'
260: },
261: fillstyle => {
262: default => 'empty',
263: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
264: description => 'Filled style for boxes:',
265: edit_type => 'choice',
266: choices => ['empty','solid','pattern']
267: },
268: plottype => {
269: default => 'Cartesian',
270: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
271: description => 'Plot type:',
272: edit_type => 'choice',
273: choices => ['Cartesian','Polar']
274: },
275: gridtype => {
276: default => 'Cartesian',
277: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
278: description => 'Grid type:',
279: edit_type => 'choice',
280: choices => ['Cartesian','Polar']
281: },
282: lmargin => {
283: default => 'default',
284: test => sub {$_[0]=~/^(default|\d+)$/},
285: description => 'Left margin width (pts):',
286: edit_type => 'choice',
287: choices => $margin_choices,
288: },
289: rmargin => {
290: default => 'default',
291: test => sub {$_[0]=~/^(default|\d+)$/},
292: description => 'Right margin width (pts):',
293: edit_type => 'choice',
294: choices => $margin_choices,
295: },
296: tmargin => {
297: default => 'default',
298: test => sub {$_[0]=~/^(default|\d+)$/},
299: description => 'Top margin width (pts):',
300: edit_type => 'choice',
301: choices => $margin_choices,
302: },
303: bmargin => {
304: default => 'default',
305: test => sub {$_[0]=~/^(default|\d+)$/},
306: description => 'Bottom margin width (pts):',
307: edit_type => 'choice',
308: choices => $margin_choices,
309: },
310: boxwidth => {
311: default => '',
312: test => $real_test,
313: description => 'width of boxes default auto',
314: edit_type => 'entry',
315: size => '5'
316: },
317: major_ticscale => {
318: default => '1',
319: test => $real_test,
320: description => 'Size of major tic marks (plot coordinates)',
321: edit_type => 'entry',
322: size => '5'
323: },
324: minor_ticscale => {
325: default => '0.5',
326: test => $real_test,
327: description => 'Size of minor tic mark (plot coordinates)',
328: edit_type => 'entry',
329: size => '5'
330: },
331: );
332:
333: my %key_defaults =
334: (
335: title => {
336: default => '',
337: test => $words_test,
338: description => 'Title of key',
339: edit_type => 'entry',
340: size => '40'
341: },
342: box => {
343: default => 'off',
344: test => $onoff_test,
345: description => 'Draw a box around the key?',
346: edit_type => 'onoff'
347: },
348: pos => {
349: default => 'top right',
350: test => $key_pos_test,
351: description => 'position of the key on the plot',
352: edit_type => 'choice',
353: choices => ['top left','top right','bottom left','bottom right',
354: 'outside','below']
355: }
356: );
357:
358: my %label_defaults =
359: (
360: xpos => {
361: default => 0,
362: test => $real_test,
363: description => 'x position of label (graph coordinates)',
364: edit_type => 'entry',
365: size => '10'
366: },
367: ypos => {
368: default => 0,
369: test => $real_test,
370: description => 'y position of label (graph coordinates)',
371: edit_type => 'entry',
372: size => '10'
373: },
374: justify => {
375: default => 'left',
376: test => sub {$_[0]=~/^(left|right|center)$/},
377: description => 'justification of the label text on the plot',
378: edit_type => 'choice',
379: choices => ['left','right','center']
380: }
381: );
382:
383: my @tic_edit_order = ('location','mirror','start','increment','end',
384: 'minorfreq');
385: my %tic_defaults =
386: (
387: location => {
388: default => 'border',
389: test => sub {$_[0]=~/^(border|axis)$/},
390: description => 'Location of major tic marks',
391: edit_type => 'choice',
392: choices => ['border','axis']
393: },
394: mirror => {
395: default => 'on',
396: test => $onoff_test,
397: description => 'mirror tics on opposite axis?',
398: edit_type => 'onoff'
399: },
400: start => {
401: default => '-10.0',
402: test => $real_test,
403: description => 'Start major tics at',
404: edit_type => 'entry',
405: size => '10'
406: },
407: increment => {
408: default => '1.0',
409: test => $real_test,
410: description => 'Place a major tic every',
411: edit_type => 'entry',
412: size => '10'
413: },
414: end => {
415: default => ' 10.0',
416: test => $real_test,
417: description => 'Stop major tics at ',
418: edit_type => 'entry',
419: size => '10'
420: },
421: minorfreq => {
422: default => '0',
423: test => $int_test,
424: description => 'Number of minor tics per major tic mark',
425: edit_type => 'entry',
426: size => '10'
427: },
428: );
429:
430: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
431: my %axis_defaults =
432: (
433: color => {
434: default => 'x000000',
435: test => $color_test,
436: description => 'color of grid lines (x000000)',
437: edit_type => 'entry',
438: size => '10'
439: },
440: xmin => {
441: default => '-10.0',
442: test => $real_test,
443: description => 'minimum x-value shown in plot',
444: edit_type => 'entry',
445: size => '10'
446: },
447: xmax => {
448: default => ' 10.0',
449: test => $real_test,
450: description => 'maximum x-value shown in plot',
451: edit_type => 'entry',
452: size => '10'
453: },
454: ymin => {
455: default => '-10.0',
456: test => $real_test,
457: description => 'minimum y-value shown in plot',
458: edit_type => 'entry',
459: size => '10'
460: },
461: ymax => {
462: default => ' 10.0',
463: test => $real_test,
464: description => 'maximum y-value shown in plot',
465: edit_type => 'entry',
466: size => '10'
467: }
468: );
469:
470: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize','limit');
471:
472: my %curve_defaults =
473: (
474: color => {
475: default => 'x000000',
476: test => $color_test,
477: description => 'color of curve (x000000)',
478: edit_type => 'entry',
479: size => '10'
480: },
481: name => {
482: default => '',
483: test => $words_test,
484: description => 'name of curve to appear in key',
485: edit_type => 'entry',
486: size => '20'
487: },
488: linestyle => {
489: default => 'lines',
490: test => $linestyle_test,
491: description => 'Line style',
492: edit_type => 'choice',
493: choices => [keys(%linestyles)]
494: },
495: # gnuplots term=gif driver does not handle linewidth :(
496: # linewidth => {
497: # default => 1,
498: # test => $int_test,
499: # description => 'Line width (may not apply to all line styles)',
500: # edit_type => 'choice',
501: # choices => [1,2,3,4,5,6,7,8,9,10]
502: # },
503: pointsize => {
504: default => 1,
505: test => $pos_real_test,
506: description => 'point size (may not apply to all line styles)',
507: edit_type => 'entry',
508: size => '5'
509: },
510: pointtype => {
511: default => 1,
512: test => $int_test,
513: description => 'point type (may not apply to all line styles)',
514: edit_type => 'choice',
515: choices => [0,1,2,3,4,5,6]
516: },
517: limit => {
518: default => 'closed',
519: test => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
520: description => 'point to fill -- for filledcurves',
521: edit_type => 'choice',
522: choices => ['closed','x1','x2','y1','y2']
523: },
524: );
525:
526: ###################################################################
527: ## ##
528: ## parsing and edit rendering ##
529: ## ##
530: ###################################################################
531:
532: undef %Apache::lonplot::plot;
533: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
534:
535: sub start_gnuplot {
536: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
537: undef($title); undef($xlabel); undef($ylabel);
538: undef(@labels); undef(@curves);
539: undef(%xtics); undef(%ytics);
540: #
541: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
542: my $result='';
543: &Apache::lonxml::register('Apache::lonplot',
544: ('title','xlabel','ylabel','key','axis','label','curve',
545: 'xtics','ytics'));
546: push (@Apache::lonxml::namespace,'lonplot');
547: if ($target eq 'web' || $target eq 'tex') {
548: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
549: $tagstack->[-1]);
550: } elsif ($target eq 'edit') {
551: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
552: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
553: \@gnuplot_edit_order);
554: } elsif ($target eq 'modified') {
555: my $constructtag=&Apache::edit::get_new_args
556: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
557: if ($constructtag) {
558: $result = &Apache::edit::rebuild_tag($token);
559: }
560: }
561: return $result;
562: }
563:
564: sub end_gnuplot {
565: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
566: pop @Apache::lonxml::namespace;
567: &Apache::lonxml::deregister('Apache::lonplot',
568: ('title','xlabel','ylabel','key','axis','label','curve'));
569: my $result = '';
570: my $randnumber;
571: # need to call rand everytime start_script would evaluate, as the
572: # safe space rand number generator and the global rand generator
573: # are not separate
574: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
575: $target eq 'answer') {
576: $randnumber=int(rand(1000));
577: }
578: if ($target eq 'web' || $target eq 'tex') {
579: &check_inputs(); # Make sure we have all the data we need
580: ##
581: ## Determine filename
582: my $tmpdir = '/home/httpd/perl/tmp/';
583: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
584: '_'.time.'_'.$$.$randnumber.'_plot';
585: ## Write the plot description to the file
586: &write_gnuplot_file($tmpdir,$filename,$target);
587: $filename = &escape($filename);
588: ## return image tag for the plot
589: if ($target eq 'web') {
590: $result .= <<"ENDIMAGE";
591: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
592: width = "$Apache::lonplot::plot{'width'}"
593: height = "$Apache::lonplot::plot{'height'}"
594: align = "$Apache::lonplot::plot{'align'}"
595: alt = "$Apache::lonplot::plot{'alttag'}" />
596: ENDIMAGE
597: } elsif ($target eq 'tex') {
598: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
599: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
600: #might be inside the safe space, register the URL for later
601: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
602: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
603: $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
604: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
605: }
606: } elsif ($target eq 'edit') {
607: $result.=&Apache::edit::tag_end($target,$token);
608: }
609: return $result;
610: }
611:
612:
613: ##--------------------------------------------------------------- xtics
614: sub start_xtics {
615: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
616: my $result='';
617: if ($target eq 'web' || $target eq 'tex') {
618: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
619: $tagstack->[-1]);
620: } elsif ($target eq 'edit') {
621: $result .= &Apache::edit::tag_start($target,$token,'xtics');
622: $result .= &edit_attributes($target,$token,\%tic_defaults,
623: \@tic_edit_order);
624: } elsif ($target eq 'modified') {
625: my $constructtag=&Apache::edit::get_new_args
626: ($token,$parstack,$safeeval,keys(%tic_defaults));
627: if ($constructtag) {
628: $result = &Apache::edit::rebuild_tag($token);
629: }
630: }
631: return $result;
632: }
633:
634: sub end_xtics {
635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
636: my $result = '';
637: if ($target eq 'web' || $target eq 'tex') {
638: } elsif ($target eq 'edit') {
639: $result.=&Apache::edit::tag_end($target,$token);
640: }
641: return $result;
642: }
643:
644: ##--------------------------------------------------------------- ytics
645: sub start_ytics {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
647: my $result='';
648: if ($target eq 'web' || $target eq 'tex') {
649: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
650: $tagstack->[-1]);
651: } elsif ($target eq 'edit') {
652: $result .= &Apache::edit::tag_start($target,$token,'ytics');
653: $result .= &edit_attributes($target,$token,\%tic_defaults,
654: \@tic_edit_order);
655: } elsif ($target eq 'modified') {
656: my $constructtag=&Apache::edit::get_new_args
657: ($token,$parstack,$safeeval,keys(%tic_defaults));
658: if ($constructtag) {
659: $result = &Apache::edit::rebuild_tag($token);
660: }
661: }
662: return $result;
663: }
664:
665: sub end_ytics {
666: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
667: my $result = '';
668: if ($target eq 'web' || $target eq 'tex') {
669: } elsif ($target eq 'edit') {
670: $result.=&Apache::edit::tag_end($target,$token);
671: }
672: return $result;
673: }
674:
675:
676: ##----------------------------------------------------------------- key
677: sub start_key {
678: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
679: my $result='';
680: if ($target eq 'web' || $target eq 'tex') {
681: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
682: $tagstack->[-1]);
683: } elsif ($target eq 'edit') {
684: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
685: $result .= &edit_attributes($target,$token,\%key_defaults);
686: } elsif ($target eq 'modified') {
687: my $constructtag=&Apache::edit::get_new_args
688: ($token,$parstack,$safeeval,keys(%key_defaults));
689: if ($constructtag) {
690: $result = &Apache::edit::rebuild_tag($token);
691: }
692: }
693: return $result;
694: }
695:
696: sub end_key {
697: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
698: my $result = '';
699: if ($target eq 'web' || $target eq 'tex') {
700: } elsif ($target eq 'edit') {
701: $result.=&Apache::edit::tag_end($target,$token);
702: }
703: return $result;
704: }
705:
706: ##------------------------------------------------------------------- title
707: sub start_title {
708: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
709: my $result='';
710: if ($target eq 'web' || $target eq 'tex') {
711: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
712: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
713: $title =~ s/\n/ /g;
714: if (length($title) > $max_str_len) {
715: $title = substr($title,0,$max_str_len);
716: }
717: } elsif ($target eq 'edit') {
718: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
719: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
720: $result.=&Apache::edit::end_row().
721: &Apache::edit::start_spanning_row().
722: &Apache::edit::editline('',$text,'',60);
723: } elsif ($target eq 'modified') {
724: $result.=&Apache::edit::rebuild_tag($token);
725: $result.=&Apache::edit::modifiedfield("/title",$parser);
726: }
727: return $result;
728: }
729:
730: sub end_title {
731: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
732: my $result = '';
733: if ($target eq 'web' || $target eq 'tex') {
734: } elsif ($target eq 'edit') {
735: $result.=&Apache::edit::tag_end($target,$token);
736: }
737: return $result;
738: }
739: ##------------------------------------------------------------------- xlabel
740: sub start_xlabel {
741: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
742: my $result='';
743: if ($target eq 'web' || $target eq 'tex') {
744: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
745: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
746: $xlabel =~ s/\n/ /g;
747: if (length($xlabel) > $max_str_len) {
748: $xlabel = substr($xlabel,0,$max_str_len);
749: }
750: } elsif ($target eq 'edit') {
751: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
752: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
753: $result.=&Apache::edit::end_row().
754: &Apache::edit::start_spanning_row().
755: &Apache::edit::editline('',$text,'',60);
756: } elsif ($target eq 'modified') {
757: $result.=&Apache::edit::rebuild_tag($token);
758: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
759: }
760: return $result;
761: }
762:
763: sub end_xlabel {
764: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
765: my $result = '';
766: if ($target eq 'web' || $target eq 'tex') {
767: } elsif ($target eq 'edit') {
768: $result.=&Apache::edit::tag_end($target,$token);
769: }
770: return $result;
771: }
772:
773: ##------------------------------------------------------------------- ylabel
774: sub start_ylabel {
775: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
776: my $result='';
777: if ($target eq 'web' || $target eq 'tex') {
778: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
779: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
780: $ylabel =~ s/\n/ /g;
781: if (length($ylabel) > $max_str_len) {
782: $ylabel = substr($ylabel,0,$max_str_len);
783: }
784: } elsif ($target eq 'edit') {
785: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
786: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
787: $result .= &Apache::edit::end_row().
788: &Apache::edit::start_spanning_row().
789: &Apache::edit::editline('',$text,'',60);
790: } elsif ($target eq 'modified') {
791: $result.=&Apache::edit::rebuild_tag($token);
792: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
793: }
794: return $result;
795: }
796:
797: sub end_ylabel {
798: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
799: my $result = '';
800: if ($target eq 'web' || $target eq 'tex') {
801: } elsif ($target eq 'edit') {
802: $result.=&Apache::edit::tag_end($target,$token);
803: }
804: return $result;
805: }
806:
807: ##------------------------------------------------------------------- label
808: sub start_label {
809: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
810: my $result='';
811: if ($target eq 'web' || $target eq 'tex') {
812: my %label;
813: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
814: $tagstack->[-1]);
815: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
816: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
817: $text =~ s/\n/ /g;
818: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
819: $label{'text'} = $text;
820: push(@labels,\%label);
821: } elsif ($target eq 'edit') {
822: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
823: $result .= &edit_attributes($target,$token,\%label_defaults);
824: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
825: $result .= &Apache::edit::end_row().
826: &Apache::edit::start_spanning_row().
827: &Apache::edit::editline('',$text,'',60);
828: } elsif ($target eq 'modified') {
829: &Apache::edit::get_new_args
830: ($token,$parstack,$safeeval,keys(%label_defaults));
831: $result.=&Apache::edit::rebuild_tag($token);
832: $result.=&Apache::edit::modifiedfield("/label",$parser);
833: }
834: return $result;
835: }
836:
837: sub end_label {
838: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
839: my $result = '';
840: if ($target eq 'web' || $target eq 'tex') {
841: } elsif ($target eq 'edit') {
842: $result.=&Apache::edit::tag_end($target,$token);
843: }
844: return $result;
845: }
846:
847: ##------------------------------------------------------------------- curve
848: sub start_curve {
849: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
850: my $result='';
851: &Apache::lonxml::register('Apache::lonplot',('function','data'));
852: push (@Apache::lonxml::namespace,'curve');
853: if ($target eq 'web' || $target eq 'tex') {
854: my %curve;
855: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
856: $tagstack->[-1]);
857: push (@curves,\%curve);
858: } elsif ($target eq 'edit') {
859: $result .= &Apache::edit::tag_start($target,$token,'Curve');
860: $result .= &edit_attributes($target,$token,\%curve_defaults,
861: \@curve_edit_order);
862: } elsif ($target eq 'modified') {
863: my $constructtag=&Apache::edit::get_new_args
864: ($token,$parstack,$safeeval,keys(%curve_defaults));
865: if ($constructtag) {
866: $result = &Apache::edit::rebuild_tag($token);
867: $result.= &Apache::edit::handle_insert();
868: }
869: }
870: return $result;
871: }
872:
873: sub end_curve {
874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
875: my $result = '';
876: pop @Apache::lonxml::namespace;
877: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
878: if ($target eq 'web' || $target eq 'tex') {
879: } elsif ($target eq 'edit') {
880: $result.=&Apache::edit::tag_end($target,$token);
881: }
882: return $result;
883: }
884:
885: ##------------------------------------------------------------ curve function
886: sub start_function {
887: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
888: my $result='';
889: if ($target eq 'web' || $target eq 'tex') {
890: if (exists($curves[-1]->{'data'})) {
891: &Apache::lonxml::warning
892: ('Use of the <b>curve function</b> tag precludes use of '.
893: ' the <b>curve data</b> tag. '.
894: 'The curve data tag will be omitted in favor of the '.
895: 'curve function declaration.');
896: delete $curves[-1]->{'data'} ;
897: }
898: my $function = &Apache::lonxml::get_all_text("/function",$parser,
899: $style);
900: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
901: $curves[-1]->{'function'} = $function;
902: } elsif ($target eq 'edit') {
903: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
904: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
905: $result .= &Apache::edit::end_row().
906: &Apache::edit::start_spanning_row().
907: &Apache::edit::editline('',$text,'',60);
908: } elsif ($target eq 'modified') {
909: $result.=&Apache::edit::rebuild_tag($token);
910: $result.=&Apache::edit::modifiedfield("/function",$parser);
911: }
912: return $result;
913: }
914:
915: sub end_function {
916: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
917: my $result = '';
918: if ($target eq 'web' || $target eq 'tex') {
919: } elsif ($target eq 'edit') {
920: $result .= &Apache::edit::end_table();
921: }
922: return $result;
923: }
924:
925: ##------------------------------------------------------------ curve data
926: sub start_data {
927: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
928: my $result='';
929: if ($target eq 'web' || $target eq 'tex') {
930: if (exists($curves[-1]->{'function'})) {
931: &Apache::lonxml::warning
932: ('Use of the <b>curve function</b> tag precludes use of '.
933: ' the <b>curve data</b> tag. '.
934: 'The curve function tag will be omitted in favor of the '.
935: 'curve data declaration.');
936: delete($curves[-1]->{'function'});
937: }
938: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
939: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
940: # Deal with cases where we're given an array...
941: if ($datatext =~ /^\@/) {
942: $datatext = &Apache::run::run('return "'.$datatext.'"',
943: $safeeval,1);
944: }
945: $datatext =~ s/\s+/ /g;
946: # Need to do some error checking on the @data array -
947: # make sure it's all numbers and make sure each array
948: # is of the same length.
949: my @data;
950: if ($datatext =~ /,/) { # comma deliminated
951: @data = split /,/,$datatext;
952: } else { # Assume it's space separated.
953: @data = split / /,$datatext;
954: }
955: for (my $i=0;$i<=$#data;$i++) {
956: # Check that it's non-empty
957: if (! defined($data[$i])) {
958: &Apache::lonxml::warning(
959: 'undefined curve data value. Replacing with '.
960: ' pi/e = 1.15572734979092');
961: $data[$i] = 1.15572734979092;
962: }
963: # Check that it's a number
964: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
965: &Apache::lonxml::warning(
966: 'Bad curve data value of '.$data[$i].' Replacing with '.
967: ' pi/e = 1.15572734979092');
968: $data[$i] = 1.15572734979092;
969: }
970: }
971: # complain if the number of data points is not the same as
972: # in previous sets of data.
973: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
974: &Apache::lonxml::warning
975: ('Number of data points is not consistent with previous '.
976: 'number of data points');
977: }
978: push @{$curves[-1]->{'data'}},\@data;
979: } elsif ($target eq 'edit') {
980: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
981: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
982: $result .= &Apache::edit::end_row().
983: &Apache::edit::start_spanning_row().
984: &Apache::edit::editline('',$text,'',60);
985: } elsif ($target eq 'modified') {
986: $result.=&Apache::edit::rebuild_tag($token);
987: $result.=&Apache::edit::modifiedfield("/data",$parser);
988: }
989: return $result;
990: }
991:
992: sub end_data {
993: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
994: my $result = '';
995: if ($target eq 'web' || $target eq 'tex') {
996: } elsif ($target eq 'edit') {
997: $result .= &Apache::edit::end_table();
998: }
999: return $result;
1000: }
1001:
1002: ##------------------------------------------------------------------- axis
1003: sub start_axis {
1004: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1005: my $result='';
1006: if ($target eq 'web' || $target eq 'tex') {
1007: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1008: $tagstack->[-1]);
1009: } elsif ($target eq 'edit') {
1010: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1011: $result .= &edit_attributes($target,$token,\%axis_defaults,
1012: \@axis_edit_order);
1013: } elsif ($target eq 'modified') {
1014: my $constructtag=&Apache::edit::get_new_args
1015: ($token,$parstack,$safeeval,keys(%axis_defaults));
1016: if ($constructtag) {
1017: $result = &Apache::edit::rebuild_tag($token);
1018: }
1019: }
1020: return $result;
1021: }
1022:
1023: sub end_axis {
1024: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1025: my $result = '';
1026: if ($target eq 'web' || $target eq 'tex') {
1027: } elsif ($target eq 'edit') {
1028: $result.=&Apache::edit::tag_end($target,$token);
1029: } elsif ($target eq 'modified') {
1030: }
1031: return $result;
1032: }
1033:
1034: ###################################################################
1035: ## ##
1036: ## Utility Functions ##
1037: ## ##
1038: ###################################################################
1039:
1040: ##----------------------------------------------------------- set_defaults
1041: sub set_defaults {
1042: my ($var,$defaults) = @_;
1043: my $key;
1044: foreach $key (keys(%$defaults)) {
1045: $var->{$key} = $defaults->{$key}->{'default'};
1046: }
1047: }
1048:
1049: ##------------------------------------------------------------------- misc
1050: sub get_attributes{
1051: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1052: foreach my $attr (keys(%{$defaults})) {
1053: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1054: $values->{$attr} =
1055: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1056: } else {
1057: $values->{$attr} =
1058: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1059: }
1060: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1061: $values->{$attr} = $defaults->{$attr}->{'default'};
1062: next;
1063: }
1064: my $test = $defaults->{$attr}->{'test'};
1065: if (! &$test($values->{$attr})) {
1066: &Apache::lonxml::warning
1067: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1068: .$defaults->{$attr}->{'default'} );
1069: $values->{$attr} = $defaults->{$attr}->{'default'};
1070: }
1071: }
1072: return ;
1073: }
1074:
1075: ##------------------------------------------------------- write_gnuplot_file
1076: sub write_gnuplot_file {
1077: my ($tmpdir,$filename,$target)= @_;
1078: my $gnuplot_input = '';
1079: my $curve;
1080: my $pt = $Apache::lonplot::plot{'texfont'};
1081: #
1082: # Check to be sure we do not have any empty curves
1083: my @curvescopy;
1084: foreach my $curve (@curves) {
1085: if (exists($curve->{'function'})) {
1086: if ($curve->{'function'} !~ /^\s*$/) {
1087: push(@curvescopy,$curve);
1088: }
1089: } elsif (exists($curve->{'data'})) {
1090: foreach my $data (@{$curve->{'data'}}) {
1091: if (scalar(@$data) > 0) {
1092: push(@curvescopy,$curve);
1093: last;
1094: }
1095: }
1096: }
1097: }
1098: @curves = @curvescopy;
1099: # Collect all the colors
1100: my @Colors;
1101: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1102: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1103: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1104: foreach $curve (@curves) {
1105: push @Colors, ($curve->{'color'} ne '' ?
1106: $curve->{'color'} :
1107: $Apache::lonplot::plot{'fgcolor'} );
1108: }
1109: # set term
1110: if ($target eq 'web') {
1111: $gnuplot_input .= 'set term '.$weboutputformat .' ';
1112: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1113: $gnuplot_input .= $Apache::lonplot::plot{'font'} . ' ';
1114: $gnuplot_input .= 'size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1115: $gnuplot_input .= "@Colors\n";
1116: # set output
1117: $gnuplot_input .= "set output\n";
1118: } elsif ($target eq 'tex') {
1119: $gnuplot_input .= "set term postscript eps $Apache::lonplot::plot{'plotcolor'} solid \"Helvetica\" $pt \n";
1120: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1121: &unescape($filename).".eps\"\n";
1122: }
1123: # cartesian or polar plot?
1124: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1125: $gnuplot_input .= 'set polar'.$/;
1126: } else {
1127: # Assume Cartesian
1128: }
1129: # cartesian or polar grid?
1130: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1131: $gnuplot_input .= 'set grid polar'.$/;
1132: } else {
1133: # Assume Cartesian
1134: }
1135: # solid or pattern for boxes?
1136: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1137: $gnuplot_input .= 'set style fill solid '.
1138: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1139: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1140: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1141: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1142: }
1143: # margin
1144: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1145: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1146: }
1147: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1148: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1149: }
1150: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1151: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1152: }
1153: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1154: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1155: }
1156: # tic scales
1157: $gnuplot_input .= 'set ticscale '.
1158: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1159: #boxwidth
1160: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1161: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1162: }
1163: # gridlayer
1164: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1165: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1166:
1167: # grid
1168: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1169: # border
1170: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1171: 'set border'.$/ :
1172: 'set noborder'.$/ );
1173: # sampling rate for non-data curves
1174: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1175: # title, xlabel, ylabel
1176: # titles
1177: if ($target eq 'tex') {
1178: $gnuplot_input .= "set title \"$title\" font \"Helvetica,".$pt."pt\"\n" if (defined($title)) ;
1179: $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
1180: $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
1181: } else {
1182: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1183: $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
1184: $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
1185: }
1186: # tics
1187: if (%xtics) {
1188: $gnuplot_input .= "set xtics $xtics{'location'} ";
1189: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1190: $gnuplot_input .= "$xtics{'start'}, ";
1191: $gnuplot_input .= "$xtics{'increment'}, ";
1192: $gnuplot_input .= "$xtics{'end'}\n";
1193: if ($xtics{'minorfreq'} != 0) {
1194: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1195: }
1196: }
1197: if (%ytics) {
1198: $gnuplot_input .= "set ytics $ytics{'location'} ";
1199: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1200: $gnuplot_input .= "$ytics{'start'}, ";
1201: $gnuplot_input .= "$ytics{'increment'}, ";
1202: $gnuplot_input .= "$ytics{'end'}\n";
1203: if ($ytics{'minorfreq'} != 0) {
1204: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1205: }
1206: }
1207: # axis
1208: if (%axis) {
1209: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1210: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1211: }
1212: # Key
1213: if (%key) {
1214: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1215: if ($key{'title'} ne '') {
1216: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1217: }
1218: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1219: } else {
1220: $gnuplot_input .= 'set nokey'.$/;
1221: }
1222: # labels
1223: my $label;
1224: foreach $label (@labels) {
1225: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1226: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
1227: if ($target eq 'tex') {
1228: $gnuplot_input .=' font "Helvetica,'.$pt.'pt"' ;
1229: }
1230: $gnuplot_input .= $/;
1231: }
1232: if ($target eq 'tex') {
1233: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1234: $gnuplot_input .="\n";
1235: }
1236: # curves
1237: $gnuplot_input .= 'plot ';
1238: for (my $i = 0;$i<=$#curves;$i++) {
1239: $curve = $curves[$i];
1240: $gnuplot_input.= ', ' if ($i > 0);
1241: if (exists($curve->{'function'})) {
1242: $gnuplot_input.=
1243: $curve->{'function'}.' title "'.
1244: $curve->{'name'}.'" with '.
1245: $curve->{'linestyle'};
1246: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1247: if (($curve->{'linestyle'} eq 'points') ||
1248: ($curve->{'linestyle'} eq 'linespoints') ||
1249: ($curve->{'linestyle'} eq 'errorbars') ||
1250: ($curve->{'linestyle'} eq 'xerrorbars') ||
1251: ($curve->{'linestyle'} eq 'yerrorbars') ||
1252: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1253: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1254: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1255: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1256: $gnuplot_input.= ' '.$curve->{'limit'};
1257: }
1258: } elsif (exists($curve->{'data'})) {
1259: # Store data values in $datatext
1260: my $datatext = '';
1261: # get new filename
1262: my $datafilename = "$tmpdir/$filename.data.$i";
1263: my $fh=Apache::File->new(">$datafilename");
1264: # Compile data
1265: my @Data = @{$curve->{'data'}};
1266: my @Data0 = @{$Data[0]};
1267: for (my $i =0; $i<=$#Data0; $i++) {
1268: my $dataset;
1269: foreach $dataset (@Data) {
1270: $datatext .= $dataset->[$i] . ' ';
1271: }
1272: $datatext .= $/;
1273: }
1274: # write file
1275: print $fh $datatext;
1276: close ($fh);
1277: # generate gnuplot text
1278: $gnuplot_input.= '"'.$datafilename.'" title "'.
1279: $curve->{'name'}.'" with '.
1280: $curve->{'linestyle'};
1281: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1282: if (($curve->{'linestyle'} eq 'points') ||
1283: ($curve->{'linestyle'} eq 'linespoints') ||
1284: ($curve->{'linestyle'} eq 'errorbars') ||
1285: ($curve->{'linestyle'} eq 'xerrorbars') ||
1286: ($curve->{'linestyle'} eq 'yerrorbars') ||
1287: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1288: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1289: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1290: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1291: $gnuplot_input.= ' '.$curve->{'limit'};
1292: }
1293: }
1294: }
1295: # Write the output to a file.
1296: my $fh=Apache::File->new(">$tmpdir$filename.data");
1297: print $fh $gnuplot_input;
1298: close($fh);
1299: # That's all folks.
1300: return ;
1301: }
1302:
1303: #---------------------------------------------- check_inputs
1304: sub check_inputs {
1305: ## Note: no inputs, no outputs - this acts only on global variables.
1306: ## Make sure we have all the input we need:
1307: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1308: if (! %key ) {} # No key for this plot, thats okay
1309: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1310: if (! defined($title )) {} # No title for this plot, thats okay
1311: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1312: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1313: if ($#labels < 0) { } # No labels for this plot, thats okay
1314: if ($#curves < 0) {
1315: &Apache::lonxml::warning("No curves specified for plot!!!!");
1316: return '';
1317: }
1318: my $curve;
1319: foreach $curve (@curves) {
1320: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1321: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1322: return '';
1323: }
1324: }
1325: }
1326:
1327: #------------------------------------------------ make_edit
1328: sub edit_attributes {
1329: my ($target,$token,$defaults,$keys) = @_;
1330: my ($result,@keys);
1331: if ($keys && ref($keys) eq 'ARRAY') {
1332: @keys = @$keys;
1333: } else {
1334: @keys = sort(keys(%$defaults));
1335: }
1336: foreach my $attr (@keys) {
1337: # append a ' ' to the description if it doesn't have one already.
1338: my $description = $defaults->{$attr}->{'description'};
1339: $description .= ' ' if ($description !~ / $/);
1340: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1341: $result .= &Apache::edit::text_arg
1342: ($description,$attr,$token,
1343: $defaults->{$attr}->{'size'});
1344: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1345: $result .= &Apache::edit::select_or_text_arg
1346: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1347: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1348: $result .= &Apache::edit::select_or_text_arg
1349: ($description,$attr,['on','off'],$token);
1350: }
1351: $result .= '<br />';
1352: }
1353: return $result;
1354: }
1355:
1356:
1357: ###################################################################
1358: ## ##
1359: ## Insertion functions for editing plots ##
1360: ## ##
1361: ###################################################################
1362:
1363: sub insert_gnuplot {
1364: my $result = '';
1365: # plot attributes
1366: $result .= "\n<gnuplot ";
1367: foreach my $attr (keys(%gnuplot_defaults)) {
1368: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1369: }
1370: $result .= ">";
1371: # Add the components (most are commented out for simplicity)
1372: # $result .= &insert_key();
1373: # $result .= &insert_axis();
1374: # $result .= &insert_title();
1375: # $result .= &insert_xlabel();
1376: # $result .= &insert_ylabel();
1377: $result .= &insert_curve();
1378: # close up the <gnuplot>
1379: $result .= "\n</gnuplot>";
1380: return $result;
1381: }
1382:
1383: sub insert_tics {
1384: my $result;
1385: $result .= &insert_xtics() . &insert_ytics;
1386: return $result;
1387: }
1388:
1389: sub insert_xtics {
1390: my $result;
1391: $result .= "\n <xtics ";
1392: foreach my $attr (keys(%tic_defaults)) {
1393: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1394: }
1395: $result .= "/>";
1396: return $result;
1397: }
1398:
1399: sub insert_ytics {
1400: my $result;
1401: $result .= "\n <ytics ";
1402: foreach my $attr (keys(%tic_defaults)) {
1403: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1404: }
1405: $result .= "/>";
1406: return $result;
1407: }
1408:
1409: sub insert_key {
1410: my $result;
1411: $result .= "\n <key ";
1412: foreach my $attr (keys(%key_defaults)) {
1413: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1414: }
1415: $result .= " />";
1416: return $result;
1417: }
1418:
1419: sub insert_axis{
1420: my $result;
1421: $result .= "\n <axis ";
1422: foreach my $attr (keys(%axis_defaults)) {
1423: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1424: }
1425: $result .= " />";
1426: return $result;
1427: }
1428:
1429: sub insert_title { return "\n <title></title>"; }
1430: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1431: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1432:
1433: sub insert_label {
1434: my $result;
1435: $result .= "\n <label ";
1436: foreach my $attr (keys(%label_defaults)) {
1437: $result .= "\n $attr=\"".
1438: $label_defaults{$attr}->{'default'}."\"";
1439: }
1440: $result .= "></label>";
1441: return $result;
1442: }
1443:
1444: sub insert_curve {
1445: my $result;
1446: $result .= "\n <curve ";
1447: foreach my $attr (keys(%curve_defaults)) {
1448: $result .= "\n $attr=\"".
1449: $curve_defaults{$attr}->{'default'}."\"";
1450: }
1451: $result .= " >";
1452: $result .= &insert_data().&insert_data()."\n </curve>";
1453: }
1454:
1455: sub insert_function {
1456: my $result;
1457: $result .= "\n <function></function>";
1458: return $result;
1459: }
1460:
1461: sub insert_data {
1462: my $result;
1463: $result .= "\n <data></data>";
1464: return $result;
1465: }
1466:
1467: ##----------------------------------------------------------------------
1468: 1;
1469: __END__
1470:
1471:
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