1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.119 2007/06/19 01:15:24 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]=~/^(\d+|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 => '9',
207: test => $sml_test,
208: description => 'Size of font to use',
209: edit_type => 'choice',
210: choices => [['5','5 (small)'],'7',['9','9 (medium)'],'10','12',['15','15 (large)']]
211: },
212: samples => {
213: default => '100',
214: test => $int_test,
215: description => 'Number of samples for non-data plots',
216: edit_type => 'choice',
217: choices => ['100','200','500','1000','2000','5000']
218: },
219: align => {
220: default => 'middle',
221: test => sub {$_[0]=~/^(left|right|middle|center)$/},
222: description => 'alignment for image in html',
223: edit_type => 'choice',
224: choices => ['left','right','middle']
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|Linear-Log|Log-Linear|Log-Log)$/},
278: description => 'Grid type:',
279: edit_type => 'choice',
280: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
281: },
282: lmargin => {
283: default => 'default',
284: test => sub {$_[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','linewidth','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: linewidth => {
496: default => 4,
497: test => $int_test,
498: description => 'Line width (may not apply to all line styles)',
499: edit_type => 'choice',
500: choices => [1,2,3,4,5,6,7,8,9,10]
501: },
502: pointsize => {
503: default => 1,
504: test => $pos_real_test,
505: description => 'point size (may not apply to all line styles)',
506: edit_type => 'entry',
507: size => '5'
508: },
509: pointtype => {
510: default => 1,
511: test => $int_test,
512: description => 'point type (may not apply to all line styles)',
513: edit_type => 'choice',
514: choices => [0,1,2,3,4,5,6]
515: },
516: limit => {
517: default => 'closed',
518: test => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
519: description => 'point to fill -- for filledcurves',
520: edit_type => 'choice',
521: choices => ['closed','x1','x2','y1','y2']
522: },
523: );
524:
525: ###################################################################
526: ## ##
527: ## parsing and edit rendering ##
528: ## ##
529: ###################################################################
530:
531: undef %Apache::lonplot::plot;
532: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
533:
534: sub start_gnuplot {
535: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
536: undef($title); undef($xlabel); undef($ylabel);
537: undef(@labels); undef(@curves);
538: undef(%xtics); undef(%ytics);
539: #
540: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
541: my $result='';
542: &Apache::lonxml::register('Apache::lonplot',
543: ('title','xlabel','ylabel','key','axis','label','curve',
544: 'xtics','ytics'));
545: push (@Apache::lonxml::namespace,'lonplot');
546: if ($target eq 'web' || $target eq 'tex') {
547: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
548: $tagstack->[-1]);
549: } elsif ($target eq 'edit') {
550: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
551: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
552: \@gnuplot_edit_order)
553: .&Apache::edit::end_row()
554: .&Apache::edit::start_spanning_row();
555: } elsif ($target eq 'modified') {
556: my $constructtag=&Apache::edit::get_new_args
557: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
558: if ($constructtag) {
559: $result = &Apache::edit::rebuild_tag($token);
560: }
561: }
562: return $result;
563: }
564:
565: sub end_gnuplot {
566: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
567: pop @Apache::lonxml::namespace;
568: &Apache::lonxml::deregister('Apache::lonplot',
569: ('title','xlabel','ylabel','key','axis','label','curve'));
570: my $result = '';
571: my $randnumber;
572: # need to call rand everytime start_script would evaluate, as the
573: # safe space rand number generator and the global rand generator
574: # are not separate
575: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
576: $target eq 'answer') {
577: $randnumber=int(rand(1000));
578: }
579: if ($target eq 'web' || $target eq 'tex') {
580: &check_inputs(); # Make sure we have all the data we need
581: ##
582: ## Determine filename
583: my $tmpdir = '/home/httpd/perl/tmp/';
584: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
585: '_'.time.'_'.$$.$randnumber.'_plot';
586: ## Write the plot description to the file
587: &write_gnuplot_file($tmpdir,$filename,$target);
588: $filename = &escape($filename);
589: ## return image tag for the plot
590: if ($target eq 'web') {
591: $result .= <<"ENDIMAGE";
592: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
593: width = "$Apache::lonplot::plot{'width'}"
594: height = "$Apache::lonplot::plot{'height'}"
595: align = "$Apache::lonplot::plot{'align'}"
596: alt = "$Apache::lonplot::plot{'alttag'}" />
597: ENDIMAGE
598: } elsif ($target eq 'tex') {
599: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
600: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
601: #might be inside the safe space, register the URL for later
602: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
603: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
604: $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
605: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
606: }
607: } elsif ($target eq 'edit') {
608: $result.=&Apache::edit::tag_end($target,$token);
609: }
610: return $result;
611: }
612:
613:
614: ##--------------------------------------------------------------- xtics
615: sub start_xtics {
616: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
617: my $result='';
618: if ($target eq 'web' || $target eq 'tex') {
619: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
620: $tagstack->[-1]);
621: } elsif ($target eq 'edit') {
622: $result .= &Apache::edit::tag_start($target,$token,'xtics');
623: $result .= &edit_attributes($target,$token,\%tic_defaults,
624: \@tic_edit_order);
625: } elsif ($target eq 'modified') {
626: my $constructtag=&Apache::edit::get_new_args
627: ($token,$parstack,$safeeval,keys(%tic_defaults));
628: if ($constructtag) {
629: $result = &Apache::edit::rebuild_tag($token);
630: }
631: }
632: return $result;
633: }
634:
635: sub end_xtics {
636: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
637: my $result = '';
638: if ($target eq 'web' || $target eq 'tex') {
639: } elsif ($target eq 'edit') {
640: $result.=&Apache::edit::tag_end($target,$token);
641: }
642: return $result;
643: }
644:
645: ##--------------------------------------------------------------- ytics
646: sub start_ytics {
647: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
648: my $result='';
649: if ($target eq 'web' || $target eq 'tex') {
650: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
651: $tagstack->[-1]);
652: } elsif ($target eq 'edit') {
653: $result .= &Apache::edit::tag_start($target,$token,'ytics');
654: $result .= &edit_attributes($target,$token,\%tic_defaults,
655: \@tic_edit_order);
656: } elsif ($target eq 'modified') {
657: my $constructtag=&Apache::edit::get_new_args
658: ($token,$parstack,$safeeval,keys(%tic_defaults));
659: if ($constructtag) {
660: $result = &Apache::edit::rebuild_tag($token);
661: }
662: }
663: return $result;
664: }
665:
666: sub end_ytics {
667: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
668: my $result = '';
669: if ($target eq 'web' || $target eq 'tex') {
670: } elsif ($target eq 'edit') {
671: $result.=&Apache::edit::tag_end($target,$token);
672: }
673: return $result;
674: }
675:
676: ##-----------------------------------------------------------------font
677: sub get_font {
678: my ($size);
679: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
680: if ( $Apache::lonplot::plot{'font'} eq 'small') {
681: $size = '5';
682: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
683: $size = '9';
684: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
685: $size = '15';
686: } else {
687: $size = '9';
688: }
689: } else {
690: $size = $Apache::lonplot::plot{'font'};
691: }
692: return ($size);
693: }
694:
695: ##----------------------------------------------------------------- key
696: sub start_key {
697: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
698: my $result='';
699: if ($target eq 'web' || $target eq 'tex') {
700: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
701: $tagstack->[-1]);
702: } elsif ($target eq 'edit') {
703: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
704: $result .= &edit_attributes($target,$token,\%key_defaults);
705: } elsif ($target eq 'modified') {
706: my $constructtag=&Apache::edit::get_new_args
707: ($token,$parstack,$safeeval,keys(%key_defaults));
708: if ($constructtag) {
709: $result = &Apache::edit::rebuild_tag($token);
710: }
711: }
712: return $result;
713: }
714:
715: sub end_key {
716: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
717: my $result = '';
718: if ($target eq 'web' || $target eq 'tex') {
719: } elsif ($target eq 'edit') {
720: $result.=&Apache::edit::tag_end($target,$token);
721: }
722: return $result;
723: }
724:
725: ##------------------------------------------------------------------- title
726: sub start_title {
727: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
728: my $result='';
729: if ($target eq 'web' || $target eq 'tex') {
730: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
731: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
732: $title =~ s/\n/ /g;
733: if (length($title) > $max_str_len) {
734: $title = substr($title,0,$max_str_len);
735: }
736: } elsif ($target eq 'edit') {
737: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
738: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
739: $result.=&Apache::edit::editline('',$text,'',60);
740: } elsif ($target eq 'modified') {
741: $result.=&Apache::edit::rebuild_tag($token);
742: $result.=&Apache::edit::modifiedfield("/title",$parser);
743: }
744: return $result;
745: }
746:
747: sub end_title {
748: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
749: my $result = '';
750: if ($target eq 'web' || $target eq 'tex') {
751: } elsif ($target eq 'edit') {
752: $result.=&Apache::edit::tag_end($target,$token);
753: }
754: return $result;
755: }
756: ##------------------------------------------------------------------- xlabel
757: sub start_xlabel {
758: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
759: my $result='';
760: if ($target eq 'web' || $target eq 'tex') {
761: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
762: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
763: $xlabel =~ s/\n/ /g;
764: if (length($xlabel) > $max_str_len) {
765: $xlabel = substr($xlabel,0,$max_str_len);
766: }
767: } elsif ($target eq 'edit') {
768: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
769: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
770: $result.=&Apache::edit::editline('',$text,'',60);
771: } elsif ($target eq 'modified') {
772: $result.=&Apache::edit::rebuild_tag($token);
773: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
774: }
775: return $result;
776: }
777:
778: sub end_xlabel {
779: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
780: my $result = '';
781: if ($target eq 'web' || $target eq 'tex') {
782: } elsif ($target eq 'edit') {
783: $result.=&Apache::edit::tag_end($target,$token);
784: }
785: return $result;
786: }
787:
788: ##------------------------------------------------------------------- ylabel
789: sub start_ylabel {
790: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
791: my $result='';
792: if ($target eq 'web' || $target eq 'tex') {
793: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
794: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
795: $ylabel =~ s/\n/ /g;
796: if (length($ylabel) > $max_str_len) {
797: $ylabel = substr($ylabel,0,$max_str_len);
798: }
799: } elsif ($target eq 'edit') {
800: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
801: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
802: $result .= &Apache::edit::editline('',$text,'',60);
803: } elsif ($target eq 'modified') {
804: $result.=&Apache::edit::rebuild_tag($token);
805: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
806: }
807: return $result;
808: }
809:
810: sub end_ylabel {
811: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
812: my $result = '';
813: if ($target eq 'web' || $target eq 'tex') {
814: } elsif ($target eq 'edit') {
815: $result.=&Apache::edit::tag_end($target,$token);
816: }
817: return $result;
818: }
819:
820: ##------------------------------------------------------------------- label
821: sub start_label {
822: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
823: my $result='';
824: if ($target eq 'web' || $target eq 'tex') {
825: my %label;
826: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
827: $tagstack->[-1]);
828: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
829: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
830: $text =~ s/\n/ /g;
831: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
832: $label{'text'} = $text;
833: push(@labels,\%label);
834: } elsif ($target eq 'edit') {
835: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
836: $result .= &edit_attributes($target,$token,\%label_defaults);
837: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
838: $result .= &Apache::edit::end_row().
839: &Apache::edit::start_spanning_row().
840: &Apache::edit::editline('',$text,'',60);
841: } elsif ($target eq 'modified') {
842: &Apache::edit::get_new_args
843: ($token,$parstack,$safeeval,keys(%label_defaults));
844: $result.=&Apache::edit::rebuild_tag($token);
845: $result.=&Apache::edit::modifiedfield("/label",$parser);
846: }
847: return $result;
848: }
849:
850: sub end_label {
851: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
852: my $result = '';
853: if ($target eq 'web' || $target eq 'tex') {
854: } elsif ($target eq 'edit') {
855: $result.=&Apache::edit::tag_end($target,$token);
856: }
857: return $result;
858: }
859:
860: ##------------------------------------------------------------------- curve
861: sub start_curve {
862: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
863: my $result='';
864: &Apache::lonxml::register('Apache::lonplot',('function','data'));
865: push (@Apache::lonxml::namespace,'curve');
866: if ($target eq 'web' || $target eq 'tex') {
867: my %curve;
868: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
869: $tagstack->[-1]);
870: push (@curves,\%curve);
871: } elsif ($target eq 'edit') {
872: $result .= &Apache::edit::tag_start($target,$token,'Curve');
873: $result .= &edit_attributes($target,$token,\%curve_defaults,
874: \@curve_edit_order)
875: .&Apache::edit::end_row()
876: .&Apache::edit::start_spanning_row();
877:
878: } elsif ($target eq 'modified') {
879: my $constructtag=&Apache::edit::get_new_args
880: ($token,$parstack,$safeeval,keys(%curve_defaults));
881: if ($constructtag) {
882: $result = &Apache::edit::rebuild_tag($token);
883: }
884: }
885: return $result;
886: }
887:
888: sub end_curve {
889: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
890: my $result = '';
891: pop @Apache::lonxml::namespace;
892: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
893: if ($target eq 'web' || $target eq 'tex') {
894: } elsif ($target eq 'edit') {
895: $result.=&Apache::edit::tag_end($target,$token);
896: }
897: return $result;
898: }
899:
900: ##------------------------------------------------------------ curve function
901: sub start_function {
902: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
903: my $result='';
904: if ($target eq 'web' || $target eq 'tex') {
905: if (exists($curves[-1]->{'data'})) {
906: &Apache::lonxml::warning
907: ('Use of the <b>curve function</b> tag precludes use of '.
908: ' the <b>curve data</b> tag. '.
909: 'The curve data tag will be omitted in favor of the '.
910: 'curve function declaration.');
911: delete $curves[-1]->{'data'} ;
912: }
913: my $function = &Apache::lonxml::get_all_text("/function",$parser,
914: $style);
915: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
916: $curves[-1]->{'function'} = $function;
917: } elsif ($target eq 'edit') {
918: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
919: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
920: $result .= &Apache::edit::editline('',$text,'',60);
921: } elsif ($target eq 'modified') {
922: $result.=&Apache::edit::rebuild_tag($token);
923: $result.=&Apache::edit::modifiedfield("/function",$parser);
924: }
925: return $result;
926: }
927:
928: sub end_function {
929: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
930: my $result = '';
931: if ($target eq 'web' || $target eq 'tex') {
932: } elsif ($target eq 'edit') {
933: $result .= &Apache::edit::end_table();
934: }
935: return $result;
936: }
937:
938: ##------------------------------------------------------------ curve data
939: sub start_data {
940: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
941: my $result='';
942: if ($target eq 'web' || $target eq 'tex') {
943: if (exists($curves[-1]->{'function'})) {
944: &Apache::lonxml::warning
945: ('Use of the <b>curve function</b> tag precludes use of '.
946: ' the <b>curve data</b> tag. '.
947: 'The curve function tag will be omitted in favor of the '.
948: 'curve data declaration.');
949: delete($curves[-1]->{'function'});
950: }
951: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
952: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
953: # Deal with cases where we're given an array...
954: if ($datatext =~ /^\@/) {
955: $datatext = &Apache::run::run('return "'.$datatext.'"',
956: $safeeval,1);
957: }
958: $datatext =~ s/\s+/ /g;
959: # Need to do some error checking on the @data array -
960: # make sure it's all numbers and make sure each array
961: # is of the same length.
962: my @data;
963: if ($datatext =~ /,/) { # comma deliminated
964: @data = split /,/,$datatext;
965: } else { # Assume it's space separated.
966: @data = split / /,$datatext;
967: }
968: for (my $i=0;$i<=$#data;$i++) {
969: # Check that it's non-empty
970: if (! defined($data[$i])) {
971: &Apache::lonxml::warning(
972: 'undefined curve data value. Replacing with '.
973: ' pi/e = 1.15572734979092');
974: $data[$i] = 1.15572734979092;
975: }
976: # Check that it's a number
977: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
978: &Apache::lonxml::warning(
979: 'Bad curve data value of '.$data[$i].' Replacing with '.
980: ' pi/e = 1.15572734979092');
981: $data[$i] = 1.15572734979092;
982: }
983: }
984: # complain if the number of data points is not the same as
985: # in previous sets of data.
986: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
987: &Apache::lonxml::warning
988: ('Number of data points is not consistent with previous '.
989: 'number of data points');
990: }
991: push @{$curves[-1]->{'data'}},\@data;
992: } elsif ($target eq 'edit') {
993: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
994: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
995: $result .= &Apache::edit::editline('',$text,'',60);
996: } elsif ($target eq 'modified') {
997: $result.=&Apache::edit::rebuild_tag($token);
998: $result.=&Apache::edit::modifiedfield("/data",$parser);
999: }
1000: return $result;
1001: }
1002:
1003: sub end_data {
1004: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1005: my $result = '';
1006: if ($target eq 'web' || $target eq 'tex') {
1007: } elsif ($target eq 'edit') {
1008: $result .= &Apache::edit::end_table();
1009: }
1010: return $result;
1011: }
1012:
1013: ##------------------------------------------------------------------- axis
1014: sub start_axis {
1015: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1016: my $result='';
1017: if ($target eq 'web' || $target eq 'tex') {
1018: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1019: $tagstack->[-1]);
1020: } elsif ($target eq 'edit') {
1021: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1022: $result .= &edit_attributes($target,$token,\%axis_defaults,
1023: \@axis_edit_order);
1024: } elsif ($target eq 'modified') {
1025: my $constructtag=&Apache::edit::get_new_args
1026: ($token,$parstack,$safeeval,keys(%axis_defaults));
1027: if ($constructtag) {
1028: $result = &Apache::edit::rebuild_tag($token);
1029: }
1030: }
1031: return $result;
1032: }
1033:
1034: sub end_axis {
1035: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1036: my $result = '';
1037: if ($target eq 'web' || $target eq 'tex') {
1038: } elsif ($target eq 'edit') {
1039: $result.=&Apache::edit::tag_end($target,$token);
1040: } elsif ($target eq 'modified') {
1041: }
1042: return $result;
1043: }
1044:
1045: ###################################################################
1046: ## ##
1047: ## Utility Functions ##
1048: ## ##
1049: ###################################################################
1050:
1051: ##----------------------------------------------------------- set_defaults
1052: sub set_defaults {
1053: my ($var,$defaults) = @_;
1054: my $key;
1055: foreach $key (keys(%$defaults)) {
1056: $var->{$key} = $defaults->{$key}->{'default'};
1057: }
1058: }
1059:
1060: ##------------------------------------------------------------------- misc
1061: sub get_attributes{
1062: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1063: foreach my $attr (keys(%{$defaults})) {
1064: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1065: $values->{$attr} =
1066: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1067: } else {
1068: $values->{$attr} =
1069: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1070: }
1071: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1072: $values->{$attr} = $defaults->{$attr}->{'default'};
1073: next;
1074: }
1075: my $test = $defaults->{$attr}->{'test'};
1076: if (! &$test($values->{$attr})) {
1077: &Apache::lonxml::warning
1078: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1079: .$defaults->{$attr}->{'default'} );
1080: $values->{$attr} = $defaults->{$attr}->{'default'};
1081: }
1082: }
1083: return ;
1084: }
1085:
1086: ##------------------------------------------------------- write_gnuplot_file
1087: sub write_gnuplot_file {
1088: my ($tmpdir,$filename,$target)= @_;
1089: my $gnuplot_input = '';
1090: my $curve;
1091: my $pt = $Apache::lonplot::plot{'texfont'};
1092: #
1093: # Check to be sure we do not have any empty curves
1094: my @curvescopy;
1095: foreach my $curve (@curves) {
1096: if (exists($curve->{'function'})) {
1097: if ($curve->{'function'} !~ /^\s*$/) {
1098: push(@curvescopy,$curve);
1099: }
1100: } elsif (exists($curve->{'data'})) {
1101: foreach my $data (@{$curve->{'data'}}) {
1102: if (scalar(@$data) > 0) {
1103: push(@curvescopy,$curve);
1104: last;
1105: }
1106: }
1107: }
1108: }
1109: @curves = @curvescopy;
1110: # Collect all the colors
1111: my @Colors;
1112: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1113: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1114: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1115: foreach $curve (@curves) {
1116: push @Colors, ($curve->{'color'} ne '' ?
1117: $curve->{'color'} :
1118: $Apache::lonplot::plot{'fgcolor'} );
1119: }
1120: # set term
1121: if ($target eq 'web') {
1122: $gnuplot_input .= 'set term '.$weboutputformat .' enhanced ';
1123: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1124: $gnuplot_input .= $Apache::lonplot::plot{'font'} . ' ';
1125: $gnuplot_input .= 'size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1126: $gnuplot_input .= "@Colors\n";
1127: # set output
1128: $gnuplot_input .= "set output\n";
1129: } elsif ($target eq 'tex') {
1130: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} solid \"Helvetica\" $pt \n";
1131: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1132: &unescape($filename).".eps\"\n";
1133: }
1134: # cartesian or polar plot?
1135: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1136: $gnuplot_input .= 'set polar'.$/;
1137: } else {
1138: # Assume Cartesian
1139: }
1140: # cartesian or polar grid?
1141: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1142: $gnuplot_input .= 'set grid polar'.$/;
1143: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1144: $gnuplot_input .= 'set logscale x'.$/;
1145: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1146: $gnuplot_input .= 'set logscale y'.$/;
1147: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1148: $gnuplot_input .= 'set logscale x'.$/;
1149: $gnuplot_input .= 'set logscale y'.$/;
1150: } else {
1151: # Assume Cartesian
1152: }
1153: # solid or pattern for boxes?
1154: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1155: $gnuplot_input .= 'set style fill solid '.
1156: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1157: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1158: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1159: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1160: }
1161: # margin
1162: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1163: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1164: }
1165: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1166: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1167: }
1168: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1169: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1170: }
1171: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1172: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1173: }
1174: # tic scales
1175: $gnuplot_input .= 'set ticscale '.
1176: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1177: #boxwidth
1178: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1179: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1180: }
1181: # gridlayer
1182: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1183: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1184:
1185: # grid
1186: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1187: # border
1188: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1189: 'set border'.$/ :
1190: 'set noborder'.$/ );
1191: # sampling rate for non-data curves
1192: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1193: # title, xlabel, ylabel
1194: # titles
1195: if ($target eq 'tex') {
1196: $gnuplot_input .= "set title \"$title\" font \"Helvetica,".$pt."pt\"\n" if (defined($title)) ;
1197: $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
1198: $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
1199: } else {
1200: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1201: $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
1202: $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
1203: }
1204: # tics
1205: if (%xtics) {
1206: $gnuplot_input .= "set xtics $xtics{'location'} ";
1207: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1208: $gnuplot_input .= "$xtics{'start'}, ";
1209: $gnuplot_input .= "$xtics{'increment'}, ";
1210: $gnuplot_input .= "$xtics{'end'}\n";
1211: if ($xtics{'minorfreq'} != 0) {
1212: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1213: }
1214: }
1215: if (%ytics) {
1216: $gnuplot_input .= "set ytics $ytics{'location'} ";
1217: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1218: $gnuplot_input .= "$ytics{'start'}, ";
1219: $gnuplot_input .= "$ytics{'increment'}, ";
1220: $gnuplot_input .= "$ytics{'end'}\n";
1221: if ($ytics{'minorfreq'} != 0) {
1222: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1223: }
1224: }
1225: # axis
1226: if (%axis) {
1227: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1228: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1229: }
1230: # Key
1231: if (%key) {
1232: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1233: if ($key{'title'} ne '') {
1234: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1235: }
1236: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1237: } else {
1238: $gnuplot_input .= 'set nokey'.$/;
1239: }
1240: # labels
1241: my $label;
1242: foreach $label (@labels) {
1243: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1244: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
1245: if ($target eq 'tex') {
1246: $gnuplot_input .=' font "Helvetica,'.$pt.'pt"' ;
1247: }
1248: $gnuplot_input .= $/;
1249: }
1250: if ($target eq 'tex') {
1251: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1252: $gnuplot_input .="\n";
1253: }
1254: # curves
1255: $gnuplot_input .= 'plot ';
1256: for (my $i = 0;$i<=$#curves;$i++) {
1257: $curve = $curves[$i];
1258: $gnuplot_input.= ', ' if ($i > 0);
1259: if ($target eq 'tex') {
1260: $curve->{'linewidth'} *= 2;
1261: }
1262: if (exists($curve->{'function'})) {
1263: $gnuplot_input.=
1264: $curve->{'function'}.' title "'.
1265: $curve->{'name'}.'" with '.
1266: $curve->{'linestyle'};
1267: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1268:
1269: if (($curve->{'linestyle'} eq 'points') ||
1270: ($curve->{'linestyle'} eq 'linespoints') ||
1271: ($curve->{'linestyle'} eq 'errorbars') ||
1272: ($curve->{'linestyle'} eq 'xerrorbars') ||
1273: ($curve->{'linestyle'} eq 'yerrorbars') ||
1274: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1275: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1276: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1277: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1278: $gnuplot_input.= ' '.$curve->{'limit'};
1279: }
1280: } elsif (exists($curve->{'data'})) {
1281: # Store data values in $datatext
1282: my $datatext = '';
1283: # get new filename
1284: my $datafilename = "$tmpdir/$filename.data.$i";
1285: my $fh=Apache::File->new(">$datafilename");
1286: # Compile data
1287: my @Data = @{$curve->{'data'}};
1288: my @Data0 = @{$Data[0]};
1289: for (my $i =0; $i<=$#Data0; $i++) {
1290: my $dataset;
1291: foreach $dataset (@Data) {
1292: $datatext .= $dataset->[$i] . ' ';
1293: }
1294: $datatext .= $/;
1295: }
1296: # write file
1297: print $fh $datatext;
1298: close($fh);
1299: # generate gnuplot text
1300: $gnuplot_input.= '"'.$datafilename.'" title "'.
1301: $curve->{'name'}.'" with '.
1302: $curve->{'linestyle'};
1303: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1304: if (($curve->{'linestyle'} eq 'points') ||
1305: ($curve->{'linestyle'} eq 'linespoints') ||
1306: ($curve->{'linestyle'} eq 'errorbars') ||
1307: ($curve->{'linestyle'} eq 'xerrorbars') ||
1308: ($curve->{'linestyle'} eq 'yerrorbars') ||
1309: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1310: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1311: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1312: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1313: $gnuplot_input.= ' '.$curve->{'limit'};
1314: }
1315: }
1316: }
1317: # Write the output to a file.
1318: my $fh=Apache::File->new(">$tmpdir$filename.data");
1319: print $fh $gnuplot_input;
1320: close($fh);
1321: # That's all folks.
1322: return ;
1323: }
1324:
1325: #---------------------------------------------- check_inputs
1326: sub check_inputs {
1327: ## Note: no inputs, no outputs - this acts only on global variables.
1328: ## Make sure we have all the input we need:
1329: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1330: if (! %key ) {} # No key for this plot, thats okay
1331: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1332: if (! defined($title )) {} # No title for this plot, thats okay
1333: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1334: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1335: if ($#labels < 0) { } # No labels for this plot, thats okay
1336: if ($#curves < 0) {
1337: &Apache::lonxml::warning("No curves specified for plot!!!!");
1338: return '';
1339: }
1340: my $curve;
1341: foreach $curve (@curves) {
1342: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1343: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1344: return '';
1345: }
1346: }
1347: }
1348:
1349: #------------------------------------------------ make_edit
1350: sub edit_attributes {
1351: my ($target,$token,$defaults,$keys) = @_;
1352: my ($result,@keys);
1353: if ($keys && ref($keys) eq 'ARRAY') {
1354: @keys = @$keys;
1355: } else {
1356: @keys = sort(keys(%$defaults));
1357: }
1358: foreach my $attr (@keys) {
1359: # append a ' ' to the description if it doesn't have one already.
1360: my $description = $defaults->{$attr}->{'description'};
1361: $description .= ' ' if ($description !~ / $/);
1362: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1363: $result .= &Apache::edit::text_arg
1364: ($description,$attr,$token,
1365: $defaults->{$attr}->{'size'});
1366: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1367: $result .= &Apache::edit::select_or_text_arg
1368: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1369: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1370: $result .= &Apache::edit::select_or_text_arg
1371: ($description,$attr,['on','off'],$token);
1372: }
1373: $result .= '<br />';
1374: }
1375: return $result;
1376: }
1377:
1378:
1379: ###################################################################
1380: ## ##
1381: ## Insertion functions for editing plots ##
1382: ## ##
1383: ###################################################################
1384:
1385: sub insert_gnuplot {
1386: my $result = '';
1387: # plot attributes
1388: $result .= "\n<gnuplot ";
1389: foreach my $attr (keys(%gnuplot_defaults)) {
1390: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1391: }
1392: $result .= ">";
1393: # Add the components (most are commented out for simplicity)
1394: # $result .= &insert_key();
1395: # $result .= &insert_axis();
1396: # $result .= &insert_title();
1397: # $result .= &insert_xlabel();
1398: # $result .= &insert_ylabel();
1399: $result .= &insert_curve();
1400: # close up the <gnuplot>
1401: $result .= "\n</gnuplot>";
1402: return $result;
1403: }
1404:
1405: sub insert_tics {
1406: my $result;
1407: $result .= &insert_xtics() . &insert_ytics;
1408: return $result;
1409: }
1410:
1411: sub insert_xtics {
1412: my $result;
1413: $result .= "\n <xtics ";
1414: foreach my $attr (keys(%tic_defaults)) {
1415: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1416: }
1417: $result .= "/>";
1418: return $result;
1419: }
1420:
1421: sub insert_ytics {
1422: my $result;
1423: $result .= "\n <ytics ";
1424: foreach my $attr (keys(%tic_defaults)) {
1425: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1426: }
1427: $result .= "/>";
1428: return $result;
1429: }
1430:
1431: sub insert_key {
1432: my $result;
1433: $result .= "\n <key ";
1434: foreach my $attr (keys(%key_defaults)) {
1435: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1436: }
1437: $result .= " />";
1438: return $result;
1439: }
1440:
1441: sub insert_axis{
1442: my $result;
1443: $result .= "\n <axis ";
1444: foreach my $attr (keys(%axis_defaults)) {
1445: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1446: }
1447: $result .= " />";
1448: return $result;
1449: }
1450:
1451: sub insert_title { return "\n <title></title>"; }
1452: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1453: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1454:
1455: sub insert_label {
1456: my $result;
1457: $result .= "\n <label ";
1458: foreach my $attr (keys(%label_defaults)) {
1459: $result .= "\n $attr=\"".
1460: $label_defaults{$attr}->{'default'}."\"";
1461: }
1462: $result .= "></label>";
1463: return $result;
1464: }
1465:
1466: sub insert_curve {
1467: my $result;
1468: $result .= "\n <curve ";
1469: foreach my $attr (keys(%curve_defaults)) {
1470: $result .= "\n $attr=\"".
1471: $curve_defaults{$attr}->{'default'}."\"";
1472: }
1473: $result .= " >";
1474: $result .= &insert_data().&insert_data()."\n </curve>";
1475: }
1476:
1477: sub insert_function {
1478: my $result;
1479: $result .= "\n <function></function>";
1480: return $result;
1481: }
1482:
1483: sub insert_data {
1484: my $result;
1485: $result .= "\n <data></data>";
1486: return $result;
1487: }
1488:
1489: ##----------------------------------------------------------------------
1490: 1;
1491: __END__
1492:
1493:
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