1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.123 2007/08/03 06:00:18 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 texwidth fontface font texfont
131: transparent grid samples
132: border align plotcolor plottype gridtype lmargin rmargin
133: tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
134: pattern solid/;
135:
136: my $margin_choices = ['default',0..20];
137:
138: my %gnuplot_defaults =
139: (
140: alttag => {
141: default => 'dynamically generated plot',
142: test => $words_test,
143: description => 'Brief description of the plot',
144: edit_type => 'entry',
145: size => '40'
146: },
147: height => {
148: default => 300,
149: test => $int_test,
150: description => 'Height of image (pixels)',
151: edit_type => 'entry',
152: size => '10'
153: },
154: width => {
155: default => 400,
156: test => $int_test,
157: description => 'Width of image (pixels)',
158: edit_type => 'entry',
159: size => '10'
160: },
161: bgcolor => {
162: default => 'xffffff',
163: test => $color_test,
164: description => 'Background color of image (xffffff)',
165: edit_type => 'entry',
166: size => '10'
167: },
168: fgcolor => {
169: default => 'x000000',
170: test => $color_test,
171: description => 'Foreground color of image (x000000)',
172: edit_type => 'entry',
173: size => '10'
174: },
175: transparent => {
176: default => 'off',
177: test => $onoff_test,
178: description => 'Transparent image',
179: edit_type => 'onoff'
180: },
181: grid => {
182: default => 'on',
183: test => $onoff_test,
184: description => 'Display grid',
185: edit_type => 'onoff'
186: },
187: gridlayer => {
188: default => 'off',
189: test => $onoff_test,
190: description => 'Display grid front layer over filled boxes or filled curves',
191: edit_type => 'onoff'
192: },
193: box_border => {
194: default => 'noborder',
195: test => sub {$_[0]=~/^(noborder|border)$/},
196: description => 'Draw border for boxes',
197: edit_type => 'choice',
198: choices => ['border','noborder']
199: },
200: border => {
201: default => 'on',
202: test => $onoff_test,
203: description => 'Draw border around plot',
204: edit_type => 'onoff'
205: },
206: font => {
207: default => '9',
208: test => $sml_test,
209: description => 'Size of font to use',
210: edit_type => 'choice',
211: choices => [['5','5 (small)'],'7',['9','9 (medium)'],'10','12',['15','15 (large)']]
212: },
213: fontface => {
214: default => 'sans-serif',
215: test => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
216: description => 'Type of font to use',
217: edit_type => 'choice',
218: choices => ['sans-serif','serif', 'classic']
219: },
220: samples => {
221: default => '100',
222: test => $int_test,
223: description => 'Number of samples for non-data plots',
224: edit_type => 'choice',
225: choices => ['100','200','500','1000','2000','5000']
226: },
227: align => {
228: default => 'middle',
229: test => sub {$_[0]=~/^(left|right|middle|center)$/},
230: description => 'Alignment for image in HTML',
231: edit_type => 'choice',
232: choices => ['left','right','middle']
233: },
234: texwidth => {
235: default => '93',
236: test => $int_test,
237: description => 'Width of plot when printed (mm)',
238: edit_type => 'entry',
239: size => '5'
240: },
241: texfont => {
242: default => '22',
243: test => $int_test,
244: description => 'Font size to use in TeX output (pts):',
245: edit_type => 'choice',
246: choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
247: },
248: plotcolor => {
249: default => 'monochrome',
250: test => sub {$_[0]=~/^(monochrome|color|colour)$/},
251: description => 'Color setting for printing:',
252: edit_type => 'choice',
253: choices => [qw/monochrome color colour/],
254: },
255: pattern => {
256: default => '',
257: test => $int_test,
258: description => 'Pattern value for boxes:',
259: edit_type => 'choice',
260: choices => [0,1,2,3,4,5,6]
261: },
262: solid => {
263: default => 0,
264: test => $real_test,
265: description => 'The density of fill style for boxes',
266: edit_type => 'entry',
267: size => '5'
268: },
269: fillstyle => {
270: default => 'empty',
271: test => sub {$_[0]=~/^(empty|solid|pattern)$/},
272: description => 'Filled style for boxes:',
273: edit_type => 'choice',
274: choices => ['empty','solid','pattern']
275: },
276: plottype => {
277: default => 'Cartesian',
278: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
279: description => 'Plot type:',
280: edit_type => 'choice',
281: choices => ['Cartesian','Polar']
282: },
283: gridtype => {
284: default => 'Cartesian',
285: test => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
286: description => 'Grid type:',
287: edit_type => 'choice',
288: choices => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
289: },
290: lmargin => {
291: default => 'default',
292: test => sub {$_[0]=~/^(default|\d+)$/},
293: description => 'Left margin width (pts):',
294: edit_type => 'choice',
295: choices => $margin_choices,
296: },
297: rmargin => {
298: default => 'default',
299: test => sub {$_[0]=~/^(default|\d+)$/},
300: description => 'Right margin width (pts):',
301: edit_type => 'choice',
302: choices => $margin_choices,
303: },
304: tmargin => {
305: default => 'default',
306: test => sub {$_[0]=~/^(default|\d+)$/},
307: description => 'Top margin width (pts):',
308: edit_type => 'choice',
309: choices => $margin_choices,
310: },
311: bmargin => {
312: default => 'default',
313: test => sub {$_[0]=~/^(default|\d+)$/},
314: description => 'Bottom margin width (pts):',
315: edit_type => 'choice',
316: choices => $margin_choices,
317: },
318: boxwidth => {
319: default => '',
320: test => $real_test,
321: description => 'Width of boxes, default is auto',
322: edit_type => 'entry',
323: size => '5'
324: },
325: major_ticscale => {
326: default => '1',
327: test => $real_test,
328: description => 'Size of major tic marks (plot coordinates)',
329: edit_type => 'entry',
330: size => '5'
331: },
332: minor_ticscale => {
333: default => '0.5',
334: test => $real_test,
335: description => 'Size of minor tic mark (plot coordinates)',
336: edit_type => 'entry',
337: size => '5'
338: },
339: );
340:
341: my %key_defaults =
342: (
343: title => {
344: default => '',
345: test => $words_test,
346: description => 'Title of key',
347: edit_type => 'entry',
348: size => '40'
349: },
350: box => {
351: default => 'off',
352: test => $onoff_test,
353: description => 'Draw a box around the key?',
354: edit_type => 'onoff'
355: },
356: pos => {
357: default => 'top right',
358: test => $key_pos_test,
359: description => 'Position of the key on the plot',
360: edit_type => 'choice',
361: choices => ['top left','top right','bottom left','bottom right',
362: 'outside','below']
363: }
364: );
365:
366: my %label_defaults =
367: (
368: xpos => {
369: default => 0,
370: test => $real_test,
371: description => 'X position of label (graph coordinates)',
372: edit_type => 'entry',
373: size => '10'
374: },
375: ypos => {
376: default => 0,
377: test => $real_test,
378: description => 'Y position of label (graph coordinates)',
379: edit_type => 'entry',
380: size => '10'
381: },
382: justify => {
383: default => 'left',
384: test => sub {$_[0]=~/^(left|right|center)$/},
385: description => 'justification of the label text on the plot',
386: edit_type => 'choice',
387: choices => ['left','right','center']
388: }
389: );
390:
391: my @tic_edit_order = ('location','mirror','start','increment','end',
392: 'minorfreq');
393: my %tic_defaults =
394: (
395: location => {
396: default => 'border',
397: test => sub {$_[0]=~/^(border|axis)$/},
398: description => 'Location of major tic marks',
399: edit_type => 'choice',
400: choices => ['border','axis']
401: },
402: mirror => {
403: default => 'on',
404: test => $onoff_test,
405: description => 'Mirror tics on opposite axis?',
406: edit_type => 'onoff'
407: },
408: start => {
409: default => '-10.0',
410: test => $real_test,
411: description => 'Start major tics at',
412: edit_type => 'entry',
413: size => '10'
414: },
415: increment => {
416: default => '1.0',
417: test => $real_test,
418: description => 'Place a major tic every',
419: edit_type => 'entry',
420: size => '10'
421: },
422: end => {
423: default => ' 10.0',
424: test => $real_test,
425: description => 'Stop major tics at ',
426: edit_type => 'entry',
427: size => '10'
428: },
429: minorfreq => {
430: default => '0',
431: test => $int_test,
432: description => 'Number of minor tics per major tic mark',
433: edit_type => 'entry',
434: size => '10'
435: },
436: );
437:
438: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
439: my %axis_defaults =
440: (
441: color => {
442: default => 'x000000',
443: test => $color_test,
444: description => 'Color of grid lines (x000000)',
445: edit_type => 'entry',
446: size => '10'
447: },
448: xmin => {
449: default => '-10.0',
450: test => $real_test,
451: description => 'Minimum x-value shown in plot',
452: edit_type => 'entry',
453: size => '10'
454: },
455: xmax => {
456: default => ' 10.0',
457: test => $real_test,
458: description => 'Maximum x-value shown in plot',
459: edit_type => 'entry',
460: size => '10'
461: },
462: ymin => {
463: default => '-10.0',
464: test => $real_test,
465: description => 'Minimum y-value shown in plot',
466: edit_type => 'entry',
467: size => '10'
468: },
469: ymax => {
470: default => ' 10.0',
471: test => $real_test,
472: description => 'Maximum y-value shown in plot',
473: edit_type => 'entry',
474: size => '10'
475: }
476: );
477:
478: my @curve_edit_order = ('color','name','linestyle','linewidth','pointtype','pointsize','limit');
479:
480: my %curve_defaults =
481: (
482: color => {
483: default => 'x000000',
484: test => $color_test,
485: description => 'Color of curve (x000000)',
486: edit_type => 'entry',
487: size => '10'
488: },
489: name => {
490: default => '',
491: test => $words_test,
492: description => 'Name of curve to appear in key',
493: edit_type => 'entry',
494: size => '20'
495: },
496: linestyle => {
497: default => 'lines',
498: test => $linestyle_test,
499: description => 'Line style',
500: edit_type => 'choice',
501: choices => [keys(%linestyles)]
502: },
503: linewidth => {
504: default => 4,
505: test => $int_test,
506: description => 'Line width (may not apply to all line styles)',
507: edit_type => 'choice',
508: choices => [1,2,3,4,5,6,7,8,9,10]
509: },
510: pointsize => {
511: default => 1,
512: test => $pos_real_test,
513: description => 'Point size (may not apply to all line styles)',
514: edit_type => 'entry',
515: size => '5'
516: },
517: pointtype => {
518: default => 1,
519: test => $int_test,
520: description => 'Point type (may not apply to all line styles)',
521: edit_type => 'choice',
522: choices => [0,1,2,3,4,5,6]
523: },
524: limit => {
525: default => 'closed',
526: test => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
527: description => 'Point to fill -- for filledcurves',
528: edit_type => 'choice',
529: choices => ['closed','x1','x2','y1','y2']
530: },
531: );
532:
533: ###################################################################
534: ## ##
535: ## parsing and edit rendering ##
536: ## ##
537: ###################################################################
538:
539: undef %Apache::lonplot::plot;
540: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
541:
542: sub start_gnuplot {
543: undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
544: undef($title); undef($xlabel); undef($ylabel);
545: undef(@labels); undef(@curves);
546: undef(%xtics); undef(%ytics);
547: #
548: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
549: my $result='';
550: &Apache::lonxml::register('Apache::lonplot',
551: ('title','xlabel','ylabel','key','axis','label','curve',
552: 'xtics','ytics'));
553: push (@Apache::lonxml::namespace,'lonplot');
554: if ($target eq 'web' || $target eq 'tex') {
555: &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
556: $tagstack->[-1]);
557: } elsif ($target eq 'edit') {
558: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
559: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
560: \@gnuplot_edit_order)
561: .&Apache::edit::end_row()
562: .&Apache::edit::start_spanning_row();
563: } elsif ($target eq 'modified') {
564: my $constructtag=&Apache::edit::get_new_args
565: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
566: if ($constructtag) {
567: $result = &Apache::edit::rebuild_tag($token);
568: }
569: }
570: return $result;
571: }
572:
573: sub end_gnuplot {
574: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
575: pop @Apache::lonxml::namespace;
576: &Apache::lonxml::deregister('Apache::lonplot',
577: ('title','xlabel','ylabel','key','axis','label','curve'));
578: my $result = '';
579: my $randnumber;
580: # need to call rand everytime start_script would evaluate, as the
581: # safe space rand number generator and the global rand generator
582: # are not separate
583: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
584: $target eq 'answer') {
585: $randnumber=int(rand(1000));
586: }
587: if ($target eq 'web' || $target eq 'tex') {
588: &check_inputs(); # Make sure we have all the data we need
589: ##
590: ## Determine filename
591: my $tmpdir = '/home/httpd/perl/tmp/';
592: my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
593: '_'.time.'_'.$$.$randnumber.'_plot';
594: ## Write the plot description to the file
595: &write_gnuplot_file($tmpdir,$filename,$target);
596: $filename = &escape($filename);
597: ## return image tag for the plot
598: if ($target eq 'web') {
599: $result .= <<"ENDIMAGE";
600: <img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
601: width = "$Apache::lonplot::plot{'width'}"
602: height = "$Apache::lonplot::plot{'height'}"
603: align = "$Apache::lonplot::plot{'align'}"
604: alt = "$Apache::lonplot::plot{'alttag'}" />
605: ENDIMAGE
606: } elsif ($target eq 'tex') {
607: &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
608: &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
609: #might be inside the safe space, register the URL for later
610: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
611: $result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
612: $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
613: $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
614: }
615: } elsif ($target eq 'edit') {
616: $result.=&Apache::edit::tag_end($target,$token);
617: }
618: return $result;
619: }
620:
621:
622: ##--------------------------------------------------------------- xtics
623: sub start_xtics {
624: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
625: my $result='';
626: if ($target eq 'web' || $target eq 'tex') {
627: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
628: $tagstack->[-1]);
629: } elsif ($target eq 'edit') {
630: $result .= &Apache::edit::tag_start($target,$token,'xtics');
631: $result .= &edit_attributes($target,$token,\%tic_defaults,
632: \@tic_edit_order);
633: } elsif ($target eq 'modified') {
634: my $constructtag=&Apache::edit::get_new_args
635: ($token,$parstack,$safeeval,keys(%tic_defaults));
636: if ($constructtag) {
637: $result = &Apache::edit::rebuild_tag($token);
638: }
639: }
640: return $result;
641: }
642:
643: sub end_xtics {
644: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
645: my $result = '';
646: if ($target eq 'web' || $target eq 'tex') {
647: } elsif ($target eq 'edit') {
648: $result.=&Apache::edit::tag_end($target,$token);
649: }
650: return $result;
651: }
652:
653: ##--------------------------------------------------------------- ytics
654: sub start_ytics {
655: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
656: my $result='';
657: if ($target eq 'web' || $target eq 'tex') {
658: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
659: $tagstack->[-1]);
660: } elsif ($target eq 'edit') {
661: $result .= &Apache::edit::tag_start($target,$token,'ytics');
662: $result .= &edit_attributes($target,$token,\%tic_defaults,
663: \@tic_edit_order);
664: } elsif ($target eq 'modified') {
665: my $constructtag=&Apache::edit::get_new_args
666: ($token,$parstack,$safeeval,keys(%tic_defaults));
667: if ($constructtag) {
668: $result = &Apache::edit::rebuild_tag($token);
669: }
670: }
671: return $result;
672: }
673:
674: sub end_ytics {
675: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
676: my $result = '';
677: if ($target eq 'web' || $target eq 'tex') {
678: } elsif ($target eq 'edit') {
679: $result.=&Apache::edit::tag_end($target,$token);
680: }
681: return $result;
682: }
683:
684: ##-----------------------------------------------------------------font
685: my %font_properties =
686: (
687: 'classic' => {
688: face => 'classic',
689: file => 'DejaVuSansMono-Bold',
690: printname => 'Helvetica',
691: tex_no_file => 1,
692: },
693: 'sans-serif' => {
694: face => 'sans-serif',
695: file => 'DejaVuSans',
696: printname => 'DejaVuSans',
697: },
698: 'serif' => {
699: face => 'serif',
700: file => 'DejaVuSerif',
701: printname => 'DejaVuSerif',
702: },
703: );
704:
705: sub get_font {
706: my ($size, $selected_font);
707:
708: if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
709: $selected_font = $font_properties{'classic'};
710: if ( $Apache::lonplot::plot{'font'} eq 'small') {
711: $size = '5';
712: } elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
713: $size = '9';
714: } elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
715: $size = '15';
716: } else {
717: $size = '9';
718: }
719: } else {
720: $size = $Apache::lonplot::plot{'font'};
721: $selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
722: }
723: return ($size, $selected_font);
724: }
725:
726: ##----------------------------------------------------------------- key
727: sub start_key {
728: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
729: my $result='';
730: if ($target eq 'web' || $target eq 'tex') {
731: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
732: $tagstack->[-1]);
733: } elsif ($target eq 'edit') {
734: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
735: $result .= &edit_attributes($target,$token,\%key_defaults);
736: } elsif ($target eq 'modified') {
737: my $constructtag=&Apache::edit::get_new_args
738: ($token,$parstack,$safeeval,keys(%key_defaults));
739: if ($constructtag) {
740: $result = &Apache::edit::rebuild_tag($token);
741: }
742: }
743: return $result;
744: }
745:
746: sub end_key {
747: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
748: my $result = '';
749: if ($target eq 'web' || $target eq 'tex') {
750: } elsif ($target eq 'edit') {
751: $result.=&Apache::edit::tag_end($target,$token);
752: }
753: return $result;
754: }
755:
756: ##------------------------------------------------------------------- title
757: sub start_title {
758: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
759: my $result='';
760: if ($target eq 'web' || $target eq 'tex') {
761: $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
762: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
763: $title =~ s/\n/ /g;
764: if (length($title) > $max_str_len) {
765: $title = substr($title,0,$max_str_len);
766: }
767: } elsif ($target eq 'edit') {
768: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
769: my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
770: $result.=&Apache::edit::editline('',$text,'',60);
771: } elsif ($target eq 'modified') {
772: $result.=&Apache::edit::rebuild_tag($token);
773: $result.=&Apache::edit::modifiedfield("/title",$parser);
774: }
775: return $result;
776: }
777:
778: sub end_title {
779: my ($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 $result;
786: }
787: ##------------------------------------------------------------------- xlabel
788: sub start_xlabel {
789: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
790: my $result='';
791: if ($target eq 'web' || $target eq 'tex') {
792: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
793: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
794: $xlabel =~ s/\n/ /g;
795: if (length($xlabel) > $max_str_len) {
796: $xlabel = substr($xlabel,0,$max_str_len);
797: }
798: } elsif ($target eq 'edit') {
799: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
800: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
801: $result.=&Apache::edit::editline('',$text,'',60);
802: } elsif ($target eq 'modified') {
803: $result.=&Apache::edit::rebuild_tag($token);
804: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
805: }
806: return $result;
807: }
808:
809: sub end_xlabel {
810: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
811: my $result = '';
812: if ($target eq 'web' || $target eq 'tex') {
813: } elsif ($target eq 'edit') {
814: $result.=&Apache::edit::tag_end($target,$token);
815: }
816: return $result;
817: }
818:
819: ##------------------------------------------------------------------- ylabel
820: sub start_ylabel {
821: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
822: my $result='';
823: if ($target eq 'web' || $target eq 'tex') {
824: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
825: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
826: $ylabel =~ s/\n/ /g;
827: if (length($ylabel) > $max_str_len) {
828: $ylabel = substr($ylabel,0,$max_str_len);
829: }
830: } elsif ($target eq 'edit') {
831: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
832: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
833: $result .= &Apache::edit::editline('',$text,'',60);
834: } elsif ($target eq 'modified') {
835: $result.=&Apache::edit::rebuild_tag($token);
836: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
837: }
838: return $result;
839: }
840:
841: sub end_ylabel {
842: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
843: my $result = '';
844: if ($target eq 'web' || $target eq 'tex') {
845: } elsif ($target eq 'edit') {
846: $result.=&Apache::edit::tag_end($target,$token);
847: }
848: return $result;
849: }
850:
851: ##------------------------------------------------------------------- label
852: sub start_label {
853: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
854: my $result='';
855: if ($target eq 'web' || $target eq 'tex') {
856: my %label;
857: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
858: $tagstack->[-1]);
859: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
860: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
861: $text =~ s/\n/ /g;
862: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
863: $label{'text'} = $text;
864: push(@labels,\%label);
865: } elsif ($target eq 'edit') {
866: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
867: $result .= &edit_attributes($target,$token,\%label_defaults);
868: my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
869: $result .= &Apache::edit::end_row().
870: &Apache::edit::start_spanning_row().
871: &Apache::edit::editline('',$text,'',60);
872: } elsif ($target eq 'modified') {
873: &Apache::edit::get_new_args
874: ($token,$parstack,$safeeval,keys(%label_defaults));
875: $result.=&Apache::edit::rebuild_tag($token);
876: $result.=&Apache::edit::modifiedfield("/label",$parser);
877: }
878: return $result;
879: }
880:
881: sub end_label {
882: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
883: my $result = '';
884: if ($target eq 'web' || $target eq 'tex') {
885: } elsif ($target eq 'edit') {
886: $result.=&Apache::edit::tag_end($target,$token);
887: }
888: return $result;
889: }
890:
891: ##------------------------------------------------------------------- curve
892: sub start_curve {
893: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
894: my $result='';
895: &Apache::lonxml::register('Apache::lonplot',('function','data'));
896: push (@Apache::lonxml::namespace,'curve');
897: if ($target eq 'web' || $target eq 'tex') {
898: my %curve;
899: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
900: $tagstack->[-1]);
901: push (@curves,\%curve);
902: } elsif ($target eq 'edit') {
903: $result .= &Apache::edit::tag_start($target,$token,'Curve');
904: $result .= &edit_attributes($target,$token,\%curve_defaults,
905: \@curve_edit_order)
906: .&Apache::edit::end_row()
907: .&Apache::edit::start_spanning_row();
908:
909: } elsif ($target eq 'modified') {
910: my $constructtag=&Apache::edit::get_new_args
911: ($token,$parstack,$safeeval,keys(%curve_defaults));
912: if ($constructtag) {
913: $result = &Apache::edit::rebuild_tag($token);
914: }
915: }
916: return $result;
917: }
918:
919: sub end_curve {
920: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
921: my $result = '';
922: pop @Apache::lonxml::namespace;
923: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
924: if ($target eq 'web' || $target eq 'tex') {
925: } elsif ($target eq 'edit') {
926: $result.=&Apache::edit::tag_end($target,$token);
927: }
928: return $result;
929: }
930:
931: ##------------------------------------------------------------ curve function
932: sub start_function {
933: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
934: my $result='';
935: if ($target eq 'web' || $target eq 'tex') {
936: if (exists($curves[-1]->{'data'})) {
937: &Apache::lonxml::warning
938: ('Use of the <b>curve function</b> tag precludes use of '.
939: ' the <b>curve data</b> tag. '.
940: 'The curve data tag will be omitted in favor of the '.
941: 'curve function declaration.');
942: delete $curves[-1]->{'data'} ;
943: }
944: my $function = &Apache::lonxml::get_all_text("/function",$parser,
945: $style);
946: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
947: $curves[-1]->{'function'} = $function;
948: } elsif ($target eq 'edit') {
949: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
950: my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
951: $result .= &Apache::edit::editline('',$text,'',60);
952: } elsif ($target eq 'modified') {
953: $result.=&Apache::edit::rebuild_tag($token);
954: $result.=&Apache::edit::modifiedfield("/function",$parser);
955: }
956: return $result;
957: }
958:
959: sub end_function {
960: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
961: my $result = '';
962: if ($target eq 'web' || $target eq 'tex') {
963: } elsif ($target eq 'edit') {
964: $result .= &Apache::edit::end_table();
965: }
966: return $result;
967: }
968:
969: ##------------------------------------------------------------ curve data
970: sub start_data {
971: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
972: my $result='';
973: if ($target eq 'web' || $target eq 'tex') {
974: if (exists($curves[-1]->{'function'})) {
975: &Apache::lonxml::warning
976: ('Use of the <b>curve function</b> tag precludes use of '.
977: ' the <b>curve data</b> tag. '.
978: 'The curve function tag will be omitted in favor of the '.
979: 'curve data declaration.');
980: delete($curves[-1]->{'function'});
981: }
982: my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
983: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
984: # Deal with cases where we're given an array...
985: if ($datatext =~ /^\@/) {
986: $datatext = &Apache::run::run('return "'.$datatext.'"',
987: $safeeval,1);
988: }
989: $datatext =~ s/\s+/ /g;
990: # Need to do some error checking on the @data array -
991: # make sure it's all numbers and make sure each array
992: # is of the same length.
993: my @data;
994: if ($datatext =~ /,/) { # comma deliminated
995: @data = split /,/,$datatext;
996: } else { # Assume it's space separated.
997: @data = split / /,$datatext;
998: }
999: for (my $i=0;$i<=$#data;$i++) {
1000: # Check that it's non-empty
1001: if (! defined($data[$i])) {
1002: &Apache::lonxml::warning(
1003: 'undefined curve data value. Replacing with '.
1004: ' pi/e = 1.15572734979092');
1005: $data[$i] = 1.15572734979092;
1006: }
1007: # Check that it's a number
1008: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
1009: &Apache::lonxml::warning(
1010: 'Bad curve data value of '.$data[$i].' Replacing with '.
1011: ' pi/e = 1.15572734979092');
1012: $data[$i] = 1.15572734979092;
1013: }
1014: }
1015: # complain if the number of data points is not the same as
1016: # in previous sets of data.
1017: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
1018: &Apache::lonxml::warning
1019: ('Number of data points is not consistent with previous '.
1020: 'number of data points');
1021: }
1022: push @{$curves[-1]->{'data'}},\@data;
1023: } elsif ($target eq 'edit') {
1024: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1025: my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1026: $result .= &Apache::edit::editline('',$text,'',60);
1027: } elsif ($target eq 'modified') {
1028: $result.=&Apache::edit::rebuild_tag($token);
1029: $result.=&Apache::edit::modifiedfield("/data",$parser);
1030: }
1031: return $result;
1032: }
1033:
1034: sub end_data {
1035: my ($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::end_table();
1040: }
1041: return $result;
1042: }
1043:
1044: ##------------------------------------------------------------------- axis
1045: sub start_axis {
1046: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1047: my $result='';
1048: if ($target eq 'web' || $target eq 'tex') {
1049: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
1050: $tagstack->[-1]);
1051: } elsif ($target eq 'edit') {
1052: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1053: $result .= &edit_attributes($target,$token,\%axis_defaults,
1054: \@axis_edit_order);
1055: } elsif ($target eq 'modified') {
1056: my $constructtag=&Apache::edit::get_new_args
1057: ($token,$parstack,$safeeval,keys(%axis_defaults));
1058: if ($constructtag) {
1059: $result = &Apache::edit::rebuild_tag($token);
1060: }
1061: }
1062: return $result;
1063: }
1064:
1065: sub end_axis {
1066: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1067: my $result = '';
1068: if ($target eq 'web' || $target eq 'tex') {
1069: } elsif ($target eq 'edit') {
1070: $result.=&Apache::edit::tag_end($target,$token);
1071: } elsif ($target eq 'modified') {
1072: }
1073: return $result;
1074: }
1075:
1076: ###################################################################
1077: ## ##
1078: ## Utility Functions ##
1079: ## ##
1080: ###################################################################
1081:
1082: ##----------------------------------------------------------- set_defaults
1083: sub set_defaults {
1084: my ($var,$defaults) = @_;
1085: my $key;
1086: foreach $key (keys(%$defaults)) {
1087: $var->{$key} = $defaults->{$key}->{'default'};
1088: }
1089: }
1090:
1091: ##------------------------------------------------------------------- misc
1092: sub get_attributes{
1093: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1094: foreach my $attr (keys(%{$defaults})) {
1095: if ($attr eq 'texwidth' || $attr eq 'texfont') {
1096: $values->{$attr} =
1097: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
1098: } else {
1099: $values->{$attr} =
1100: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1101: }
1102: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1103: $values->{$attr} = $defaults->{$attr}->{'default'};
1104: next;
1105: }
1106: my $test = $defaults->{$attr}->{'test'};
1107: if (! &$test($values->{$attr})) {
1108: &Apache::lonxml::warning
1109: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1110: .$defaults->{$attr}->{'default'} );
1111: $values->{$attr} = $defaults->{$attr}->{'default'};
1112: }
1113: }
1114: return ;
1115: }
1116:
1117: ##------------------------------------------------------- write_gnuplot_file
1118: sub write_gnuplot_file {
1119: my ($tmpdir,$filename,$target)= @_;
1120: my ($fontsize, $font_properties) = &get_font();
1121: my $gnuplot_input = '';
1122: my $curve;
1123: my $pt = $Apache::lonplot::plot{'texfont'};
1124: #
1125: # Check to be sure we do not have any empty curves
1126: my @curvescopy;
1127: foreach my $curve (@curves) {
1128: if (exists($curve->{'function'})) {
1129: if ($curve->{'function'} !~ /^\s*$/) {
1130: push(@curvescopy,$curve);
1131: }
1132: } elsif (exists($curve->{'data'})) {
1133: foreach my $data (@{$curve->{'data'}}) {
1134: if (scalar(@$data) > 0) {
1135: push(@curvescopy,$curve);
1136: last;
1137: }
1138: }
1139: }
1140: }
1141: @curves = @curvescopy;
1142: # Collect all the colors
1143: my @Colors;
1144: push @Colors, $Apache::lonplot::plot{'bgcolor'};
1145: push @Colors, $Apache::lonplot::plot{'fgcolor'};
1146: push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1147: foreach $curve (@curves) {
1148: push @Colors, ($curve->{'color'} ne '' ?
1149: $curve->{'color'} :
1150: $Apache::lonplot::plot{'fgcolor'} );
1151: }
1152: # set term
1153: if ($target eq 'web') {
1154: $gnuplot_input .= 'set terminal png enhanced nocrop ';
1155: $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1156: $gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1157: '/'.$font_properties->{'file'}.'.ttf" ';
1158: $gnuplot_input .= $fontsize;
1159: $gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1160: $gnuplot_input .= "@Colors\n";
1161: # set output
1162: $gnuplot_input .= "set output\n";
1163: } elsif ($target eq 'tex') {
1164: $gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} solid ";
1165: if (!$font_properties->{'tex_no_file'}) {
1166: $gnuplot_input .=
1167: 'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
1168: '/'.$font_properties->{'file'}.'.pfb" ';
1169: }
1170: $gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
1171: $gnuplot_input .= $fontsize;
1172: $gnuplot_input .= "\nset output \"/home/httpd/perl/tmp/".
1173: &unescape($filename).".eps\"\n";
1174: }
1175: # cartesian or polar plot?
1176: if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1177: $gnuplot_input .= 'set polar'.$/;
1178: } else {
1179: # Assume Cartesian
1180: }
1181: # cartesian or polar grid?
1182: if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
1183: $gnuplot_input .= 'set grid polar'.$/;
1184: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
1185: $gnuplot_input .= 'set logscale x'.$/;
1186: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
1187: $gnuplot_input .= 'set logscale y'.$/;
1188: } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
1189: $gnuplot_input .= 'set logscale x'.$/;
1190: $gnuplot_input .= 'set logscale y'.$/;
1191: } else {
1192: # Assume Cartesian
1193: }
1194: # solid or pattern for boxes?
1195: if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
1196: $gnuplot_input .= 'set style fill solid '.
1197: $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
1198: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
1199: $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
1200: } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
1201: }
1202: # margin
1203: if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
1204: $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1205: }
1206: if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
1207: $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1208: }
1209: if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
1210: $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1211: }
1212: if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
1213: $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1214: }
1215: # tic scales
1216: $gnuplot_input .= 'set ticscale '.
1217: $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1218: #boxwidth
1219: if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
1220: $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
1221: }
1222: # gridlayer
1223: $gnuplot_input .= 'set grid noxtics noytics front '.$/
1224: if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
1225:
1226: # grid
1227: $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1228: # border
1229: $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1230: 'set border'.$/ :
1231: 'set noborder'.$/ );
1232: # sampling rate for non-data curves
1233: $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1234: # title, xlabel, ylabel
1235: # titles
1236: if ($target eq 'tex') {
1237: $gnuplot_input .= "set title \"$title\" font \"".$font_properties->{'printname'}.",".$pt."pt\"\n" if (defined($title)) ;
1238: $gnuplot_input .= "set xlabel \"$xlabel\" font \"".$font_properties->{'printname'}.",".$pt."pt\"\n" if (defined($xlabel));
1239: $gnuplot_input .= "set ylabel \"$ylabel\" font \"".$font_properties->{'printname'}.",".$pt."pt\"\n" if (defined($ylabel));
1240: } else {
1241: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1242: $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
1243: $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
1244: }
1245: # tics
1246: if (%xtics) {
1247: $gnuplot_input .= "set xtics $xtics{'location'} ";
1248: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1249: $gnuplot_input .= "$xtics{'start'}, ";
1250: $gnuplot_input .= "$xtics{'increment'}, ";
1251: $gnuplot_input .= "$xtics{'end'}\n";
1252: if ($xtics{'minorfreq'} != 0) {
1253: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1254: }
1255: }
1256: if (%ytics) {
1257: $gnuplot_input .= "set ytics $ytics{'location'} ";
1258: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1259: $gnuplot_input .= "$ytics{'start'}, ";
1260: $gnuplot_input .= "$ytics{'increment'}, ";
1261: $gnuplot_input .= "$ytics{'end'}\n";
1262: if ($ytics{'minorfreq'} != 0) {
1263: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1264: }
1265: }
1266: # axis
1267: if (%axis) {
1268: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1269: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1270: }
1271: # Key
1272: if (%key) {
1273: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1274: if ($key{'title'} ne '') {
1275: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1276: }
1277: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1278: } else {
1279: $gnuplot_input .= 'set nokey'.$/;
1280: }
1281: # labels
1282: my $label;
1283: foreach $label (@labels) {
1284: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1285: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
1286: if ($target eq 'tex') {
1287: $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$pt.'pt"' ;
1288: }
1289: $gnuplot_input .= $/;
1290: }
1291: if ($target eq 'tex') {
1292: $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1293: $gnuplot_input .="\n";
1294: }
1295: # curves
1296: $gnuplot_input .= 'plot ';
1297: for (my $i = 0;$i<=$#curves;$i++) {
1298: $curve = $curves[$i];
1299: $gnuplot_input.= ', ' if ($i > 0);
1300: if ($target eq 'tex') {
1301: $curve->{'linewidth'} *= 2;
1302: }
1303: if (exists($curve->{'function'})) {
1304: $gnuplot_input.=
1305: $curve->{'function'}.' title "'.
1306: $curve->{'name'}.'" with '.
1307: $curve->{'linestyle'};
1308: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1309:
1310: if (($curve->{'linestyle'} eq 'points') ||
1311: ($curve->{'linestyle'} eq 'linespoints') ||
1312: ($curve->{'linestyle'} eq 'errorbars') ||
1313: ($curve->{'linestyle'} eq 'xerrorbars') ||
1314: ($curve->{'linestyle'} eq 'yerrorbars') ||
1315: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1316: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1317: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1318: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1319: $gnuplot_input.= ' '.$curve->{'limit'};
1320: }
1321: } elsif (exists($curve->{'data'})) {
1322: # Store data values in $datatext
1323: my $datatext = '';
1324: # get new filename
1325: my $datafilename = "$tmpdir/$filename.data.$i";
1326: my $fh=Apache::File->new(">$datafilename");
1327: # Compile data
1328: my @Data = @{$curve->{'data'}};
1329: my @Data0 = @{$Data[0]};
1330: for (my $i =0; $i<=$#Data0; $i++) {
1331: my $dataset;
1332: foreach $dataset (@Data) {
1333: $datatext .= $dataset->[$i] . ' ';
1334: }
1335: $datatext .= $/;
1336: }
1337: # write file
1338: print $fh $datatext;
1339: close($fh);
1340: # generate gnuplot text
1341: $gnuplot_input.= '"'.$datafilename.'" title "'.
1342: $curve->{'name'}.'" with '.
1343: $curve->{'linestyle'};
1344: $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1345: if (($curve->{'linestyle'} eq 'points') ||
1346: ($curve->{'linestyle'} eq 'linespoints') ||
1347: ($curve->{'linestyle'} eq 'errorbars') ||
1348: ($curve->{'linestyle'} eq 'xerrorbars') ||
1349: ($curve->{'linestyle'} eq 'yerrorbars') ||
1350: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1351: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1352: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1353: } elsif ($curve->{'linestyle'} eq 'filledcurves') {
1354: $gnuplot_input.= ' '.$curve->{'limit'};
1355: }
1356: }
1357: }
1358: # Write the output to a file.
1359: my $fh=Apache::File->new(">$tmpdir$filename.data");
1360: print $fh $gnuplot_input;
1361: close($fh);
1362: # That's all folks.
1363: return ;
1364: }
1365:
1366: #---------------------------------------------- check_inputs
1367: sub check_inputs {
1368: ## Note: no inputs, no outputs - this acts only on global variables.
1369: ## Make sure we have all the input we need:
1370: if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1371: if (! %key ) {} # No key for this plot, thats okay
1372: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1373: if (! defined($title )) {} # No title for this plot, thats okay
1374: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1375: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1376: if ($#labels < 0) { } # No labels for this plot, thats okay
1377: if ($#curves < 0) {
1378: &Apache::lonxml::warning("No curves specified for plot!!!!");
1379: return '';
1380: }
1381: my $curve;
1382: foreach $curve (@curves) {
1383: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1384: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1385: return '';
1386: }
1387: }
1388: }
1389:
1390: #------------------------------------------------ make_edit
1391: sub edit_attributes {
1392: my ($target,$token,$defaults,$keys) = @_;
1393: my ($result,@keys);
1394: if ($keys && ref($keys) eq 'ARRAY') {
1395: @keys = @$keys;
1396: } else {
1397: @keys = sort(keys(%$defaults));
1398: }
1399: foreach my $attr (@keys) {
1400: # append a ' ' to the description if it doesn't have one already.
1401: my $description = $defaults->{$attr}->{'description'};
1402: $description .= ' ' if ($description !~ / $/);
1403: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1404: $result .= &Apache::edit::text_arg
1405: ($description,$attr,$token,
1406: $defaults->{$attr}->{'size'});
1407: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1408: $result .= &Apache::edit::select_or_text_arg
1409: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1410: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1411: $result .= &Apache::edit::select_or_text_arg
1412: ($description,$attr,['on','off'],$token);
1413: }
1414: $result .= '<br />';
1415: }
1416: return $result;
1417: }
1418:
1419:
1420: ###################################################################
1421: ## ##
1422: ## Insertion functions for editing plots ##
1423: ## ##
1424: ###################################################################
1425:
1426: sub insert_gnuplot {
1427: my $result = '';
1428: # plot attributes
1429: $result .= "\n<gnuplot ";
1430: foreach my $attr (keys(%gnuplot_defaults)) {
1431: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1432: }
1433: $result .= ">";
1434: # Add the components (most are commented out for simplicity)
1435: # $result .= &insert_key();
1436: # $result .= &insert_axis();
1437: # $result .= &insert_title();
1438: # $result .= &insert_xlabel();
1439: # $result .= &insert_ylabel();
1440: $result .= &insert_curve();
1441: # close up the <gnuplot>
1442: $result .= "\n</gnuplot>";
1443: return $result;
1444: }
1445:
1446: sub insert_tics {
1447: my $result;
1448: $result .= &insert_xtics() . &insert_ytics;
1449: return $result;
1450: }
1451:
1452: sub insert_xtics {
1453: my $result;
1454: $result .= "\n <xtics ";
1455: foreach my $attr (keys(%tic_defaults)) {
1456: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1457: }
1458: $result .= "/>";
1459: return $result;
1460: }
1461:
1462: sub insert_ytics {
1463: my $result;
1464: $result .= "\n <ytics ";
1465: foreach my $attr (keys(%tic_defaults)) {
1466: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1467: }
1468: $result .= "/>";
1469: return $result;
1470: }
1471:
1472: sub insert_key {
1473: my $result;
1474: $result .= "\n <key ";
1475: foreach my $attr (keys(%key_defaults)) {
1476: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1477: }
1478: $result .= " />";
1479: return $result;
1480: }
1481:
1482: sub insert_axis{
1483: my $result;
1484: $result .= "\n <axis ";
1485: foreach my $attr (keys(%axis_defaults)) {
1486: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1487: }
1488: $result .= " />";
1489: return $result;
1490: }
1491:
1492: sub insert_title { return "\n <title></title>"; }
1493: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1494: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1495:
1496: sub insert_label {
1497: my $result;
1498: $result .= "\n <label ";
1499: foreach my $attr (keys(%label_defaults)) {
1500: $result .= "\n $attr=\"".
1501: $label_defaults{$attr}->{'default'}."\"";
1502: }
1503: $result .= "></label>";
1504: return $result;
1505: }
1506:
1507: sub insert_curve {
1508: my $result;
1509: $result .= "\n <curve ";
1510: foreach my $attr (keys(%curve_defaults)) {
1511: $result .= "\n $attr=\"".
1512: $curve_defaults{$attr}->{'default'}."\"";
1513: }
1514: $result .= " >";
1515: $result .= &insert_data().&insert_data()."\n </curve>";
1516: }
1517:
1518: sub insert_function {
1519: my $result;
1520: $result .= "\n <function></function>";
1521: return $result;
1522: }
1523:
1524: sub insert_data {
1525: my $result;
1526: $result .= "\n <data></data>";
1527: return $result;
1528: }
1529:
1530: ##----------------------------------------------------------------------
1531: 1;
1532: __END__
1533:
1534:
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