1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.93 2003/10/30 20:52:54 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: # 12/15/01 Matthew
29: # 12/17 12/18 12/19 12/20 12/21 12/27 12/28 12/30 12/31 Matthew
30: # 01/01/02 Matthew
31: # 01/02 01/03 01/04 01/07 01/08 01/09 Matthew
32: # 01/21 02/05 02/06 2/28Matthew
33:
34: package Apache::lonplot;
35:
36: use strict;
37: use warnings FATAL=>'all';
38: no warnings 'uninitialized';
39: use Apache::File;
40: use Apache::response;
41: use Apache::lonxml;
42: use Apache::edit;
43:
44: BEGIN {
45: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
46: }
47:
48: ##
49: ## Description of data structures:
50: ##
51: ## %plot %key %axis
52: ## --------------------------
53: ## height title color
54: ## width box xmin
55: ## bgcolor pos xmax
56: ## fgcolor ymin
57: ## transparent ymax
58: ## grid
59: ## border
60: ## font
61: ## align
62: ##
63: ## @labels: $labels[$i] = \%label
64: ## %label: text, xpos, ypos, justify
65: ##
66: ## @curves: $curves[$i] = \%curve
67: ## %curve: name, linestyle, ( function | data )
68: ##
69: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
70: ## [y1,y2,y3,y4] ]
71: ##
72:
73: ###################################################################
74: ## ##
75: ## Tests used in checking the validitity of input ##
76: ## ##
77: ###################################################################
78:
79: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
80: # is longer than this, it will be truncated.
81:
82: my %linestyles =
83: (
84: lines => 2, # Maybe this will be used in the future
85: linespoints => 2, # to check on whether or not they have
86: dots => 2, # supplied enough <data></data> fields
87: points => 2, # to use the given line style. But for
88: steps => 2, # now there are more important things
89: fsteps => 2, # for me to deal with.
90: histeps => 2,
91: errorbars => 3,
92: xerrorbars => [3,4],
93: yerrorbars => [3,4],
94: xyerrorbars => [4,6],
95: boxes => 3,
96: vector => 4
97: );
98:
99: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
100: my $real_test =
101: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
102: my $pos_real_test =
103: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
104: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
105: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
106: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
107: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
108: my $linestyle_test = sub {exists($linestyles{$_[0]})};
109: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
110:
111: ###################################################################
112: ## ##
113: ## Attribute metadata ##
114: ## ##
115: ###################################################################
116: my @gnuplot_edit_order =
117: qw/alttag bgcolor fgcolor height width font transparent grid samples
118: border align texwidth texfont plottype/;
119:
120: my $gnuplot_help_text = <<"ENDPLOTHELP";
121: <p>
122: The <b>gnuplot</b> tag allows an author to design a plot which can
123: be created on the fly. This is intended for use in homework problems
124: where each student needs to see a distinct plot. It can be used in
125: conjunction with a <b>script</b> tag to generate random plots.
126: </p><p>
127: A <b>gnuplot</b> tag can contain the following sub-tags:
128: </p>
129: <dl>
130: <dt> Plot Label
131: <dd> Allows you to place text at a given (x,y) coordinate on the plot.
132: <dt> Plot Title
133: <dd> The title of the plot
134: <dt> Plot Xlabel
135: <dd> The label on the horizontal axis of the plot
136: <dt> Plot Ylabel
137: <dd> The label on the vertical axis of the plot
138: <dt> Plot Axes
139: <dd> allows specification of the x and y ranges displayed in the plot
140: <dt> Plot Key
141: <dd> Lists the functions displayed in the plot.
142: <dt> Plot Curve
143: <dd> Sets the data used in the plot.
144: <dt> Plot Tics
145: <dd> Allows specification of the x and y coordinate 'tics' on the axes.
146: This is mostly used to adjust the grid lines when a grid is displayed.
147: </dl>
148: If you are having trouble with your plot, please read the help
149: available on Plot Curve.
150: ENDPLOTHELP
151:
152: my %gnuplot_defaults =
153: (
154: alttag => {
155: default => 'dynamically generated plot',
156: test => $words_test,
157: description => 'brief description of the plot',
158: edit_type => 'entry',
159: size => '40'
160: },
161: height => {
162: default => 300,
163: test => $int_test,
164: description => 'height of image (pixels)',
165: edit_type => 'entry',
166: size => '10'
167: },
168: width => {
169: default => 400,
170: test => $int_test,
171: description => 'width of image (pixels)',
172: edit_type => 'entry',
173: size => '10'
174: },
175: bgcolor => {
176: default => 'xffffff',
177: test => $color_test,
178: description => 'background color of image (xffffff)',
179: edit_type => 'entry',
180: size => '10'
181: },
182: fgcolor => {
183: default => 'x000000',
184: test => $color_test,
185: description => 'foreground color of image (x000000)',
186: edit_type => 'entry',
187: size => '10'
188: },
189: transparent => {
190: default => 'off',
191: test => $onoff_test,
192: description => 'Transparent image',
193: edit_type => 'onoff'
194: },
195: grid => {
196: default => 'on',
197: test => $onoff_test,
198: description => 'Display grid',
199: edit_type => 'onoff'
200: },
201: border => {
202: default => 'on',
203: test => $onoff_test,
204: description => 'Draw border around plot',
205: edit_type => 'onoff'
206: },
207: font => {
208: default => 'medium',
209: test => $sml_test,
210: description => 'Size of font to use',
211: edit_type => 'choice',
212: choices => ['small','medium','large']
213: },
214: samples => {
215: default => '100',
216: test => $int_test,
217: description => 'Number of samples for non-data plots',
218: edit_type => 'choice',
219: choices => ['100','200','500','1000','2000','5000']
220: },
221: align => {
222: default => 'center',
223: test => sub {$_[0]=~/^(left|right|center)$/},
224: description => 'alignment for image in html',
225: edit_type => 'choice',
226: choices => ['left','right','center']
227: },
228: texwidth => {
229: default => '93',
230: test => $int_test,
231: description => 'Width of plot when printed (mm)',
232: edit_type => 'entry',
233: size => '5'
234: },
235: texfont => {
236: default => '22',
237: test => $int_test,
238: description => 'Font size to use in TeX output (pts):',
239: edit_type => 'choice',
240: choices => [qw/10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
241: },
242: plottype => {
243: default => 'Cartesian',
244: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
245: description => 'Plot type:',
246: edit_type => 'choice',
247: choices => ['Polar','Cartesian']
248: },
249: );
250:
251: my %key_defaults =
252: (
253: title => {
254: default => '',
255: test => $words_test,
256: description => 'Title of key',
257: edit_type => 'entry',
258: size => '40'
259: },
260: box => {
261: default => 'off',
262: test => $onoff_test,
263: description => 'Draw a box around the key?',
264: edit_type => 'onoff'
265: },
266: pos => {
267: default => 'top right',
268: test => $key_pos_test,
269: description => 'position of the key on the plot',
270: edit_type => 'choice',
271: choices => ['top left','top right','bottom left','bottom right',
272: 'outside','below']
273: }
274: );
275:
276: my %label_defaults =
277: (
278: xpos => {
279: default => 0,
280: test => $real_test,
281: description => 'x position of label (graph coordinates)',
282: edit_type => 'entry',
283: size => '10'
284: },
285: ypos => {
286: default => 0,
287: test => $real_test,
288: description => 'y position of label (graph coordinates)',
289: edit_type => 'entry',
290: size => '10'
291: },
292: justify => {
293: default => 'left',
294: test => sub {$_[0]=~/^(left|right|center)$/},
295: description => 'justification of the label text on the plot',
296: edit_type => 'choice',
297: choices => ['left','right','center']
298: }
299: );
300:
301: my @tic_edit_order = ('location','mirror','start','increment','end',
302: 'minorfreq');
303: my %tic_defaults =
304: (
305: location => {
306: default => 'border',
307: test => sub {$_[0]=~/^(border|axis)$/},
308: description => 'Location of major tic marks',
309: edit_type => 'choice',
310: choices => ['border','axis']
311: },
312: mirror => {
313: default => 'on',
314: test => $onoff_test,
315: description => 'mirror tics on opposite axis?',
316: edit_type => 'onoff'
317: },
318: start => {
319: default => '-10.0',
320: test => $real_test,
321: description => 'Start major tics at',
322: edit_type => 'entry',
323: size => '10'
324: },
325: increment => {
326: default => '1.0',
327: test => $real_test,
328: description => 'Place a major tic every',
329: edit_type => 'entry',
330: size => '10'
331: },
332: end => {
333: default => ' 10.0',
334: test => $real_test,
335: description => 'Stop major tics at ',
336: edit_type => 'entry',
337: size => '10'
338: },
339: minorfreq => {
340: default => '0',
341: test => $int_test,
342: description => 'Number of minor tics between major tic marks',
343: edit_type => 'entry',
344: size => '10'
345: },
346: );
347:
348: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
349: my %axis_defaults =
350: (
351: color => {
352: default => 'x000000',
353: test => $color_test,
354: description => 'color of grid lines (x000000)',
355: edit_type => 'entry',
356: size => '10'
357: },
358: xmin => {
359: default => '-10.0',
360: test => $real_test,
361: description => 'minimum x-value shown in plot',
362: edit_type => 'entry',
363: size => '10'
364: },
365: xmax => {
366: default => ' 10.0',
367: test => $real_test,
368: description => 'maximum x-value shown in plot',
369: edit_type => 'entry',
370: size => '10'
371: },
372: ymin => {
373: default => '-10.0',
374: test => $real_test,
375: description => 'minimum y-value shown in plot',
376: edit_type => 'entry',
377: size => '10'
378: },
379: ymax => {
380: default => ' 10.0',
381: test => $real_test,
382: description => 'maximum y-value shown in plot',
383: edit_type => 'entry',
384: size => '10'
385: }
386: );
387:
388: my $curve_help_text = <<"ENDCURVEHELP";
389: The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
390: There are two ways of entering the information:
391: <dl>
392: <dt> Curve Data
393: <dd> Using a <b>data</b> tag you can specify the numbers used to produce
394: the plot.
395: <p>
396: By default, two <b>data</b> tags will be available in a plot. The
397: first will specify X coordinates of the data and the second will
398: give the Y coordinates of the data. When working with a linestyle that
399: requires more than two data sets, inserting another <b>data</b> tag is
400: required. Unfortunately, you must make sure the <b>data</b> tags appear
401: in the order gnuplot expects the data.
402: </p><p>
403: Specifying the data should usually be done with a perl variable or array,
404: such as \@Xdata and \@Ydata. You may also specify numerical data seperated
405: by commas. Again, the order of the <b>data</b> tags is important. The
406: first tag will be the X data and the second will be the Y data.
407: </p>
408: <dt> Curve Function
409: <dd> The <b>function</b> tag allows you to specify the curve to be
410: plotted as a formula that gnuplot can understand. <b>Be careful using this
411: tag.</b> It is surprisingly easy to give gnuplot a function it cannot deal
412: with properly. Be explicit: 2*sin(2*3.141592*x/4) will work but
413: 2sin(2*3.141592x/4) will not. If you do not receive any errors in the
414: gnuplot data but still do not have an image produced, it is likely there
415: is an error in your <b>function</b> tag.
416: </dl>
417: ENDCURVEHELP
418:
419: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
420:
421: my %curve_defaults =
422: (
423: color => {
424: default => 'x000000',
425: test => $color_test,
426: description => 'color of curve (x000000)',
427: edit_type => 'entry',
428: size => '10'
429: },
430: name => {
431: default => '',
432: test => $words_test,
433: description => 'name of curve to appear in key',
434: edit_type => 'entry',
435: size => '20'
436: },
437: linestyle => {
438: default => 'lines',
439: test => $linestyle_test,
440: description => 'Line style',
441: edit_type => 'choice',
442: choices => [keys(%linestyles)]
443: },
444: # gnuplots term=gif driver does not handle linewidth :(
445: # linewidth => {
446: # default => 1,
447: # test => $int_test,
448: # description => 'Line width (may not apply to all line styles)',
449: # edit_type => 'choice',
450: # choices => [1,2,3,4,5,6,7,8,9,10]
451: # },
452: pointsize => {
453: default => 1,
454: test => $pos_real_test,
455: description => 'point size (may not apply to all line styles)',
456: edit_type => 'entry',
457: size => '5'
458: },
459: pointtype => {
460: default => 1,
461: test => $int_test,
462: description => 'point type (may not apply to all line styles)',
463: edit_type => 'choice',
464: choices => [0,1,2,3,4,5,6]
465: }
466: );
467:
468: ###################################################################
469: ## ##
470: ## parsing and edit rendering ##
471: ## ##
472: ###################################################################
473: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
474:
475: sub start_gnuplot {
476: undef(%plot); undef(%key); undef(%axis);
477: undef($title); undef($xlabel); undef($ylabel);
478: undef(@labels); undef(@curves);
479: undef(%xtics); undef(%ytics);
480: #
481: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
482: my $result='';
483: &Apache::lonxml::register('Apache::lonplot',
484: ('title','xlabel','ylabel','key','axis','label','curve',
485: 'xtics','ytics'));
486: push (@Apache::lonxml::namespace,'lonplot');
487: if ($target eq 'web' || $target eq 'tex') {
488: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
489: $tagstack->[-1]);
490: } elsif ($target eq 'edit') {
491: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
492: $result .= &make_javascript();
493: $result .= &help_win($gnuplot_help_text);
494: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
495: \@gnuplot_edit_order);
496: } elsif ($target eq 'modified') {
497: my $constructtag=&Apache::edit::get_new_args
498: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
499: if ($constructtag) {
500: $result = &Apache::edit::rebuild_tag($token);
501: }
502: }
503: return $result;
504: }
505:
506: sub end_gnuplot {
507: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
508: pop @Apache::lonxml::namespace;
509: &Apache::lonxml::deregister('Apache::lonplot',
510: ('title','xlabel','ylabel','key','axis','label','curve'));
511: my $result = '';
512: my $randnumber;
513: # need to call rand everytime start_script would evaluate, as the
514: # safe space rand number generator and the global rand generator
515: # are not seperate
516: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
517: $target eq 'answer') {
518: $randnumber=int(rand(1000));
519: }
520: if ($target eq 'web' || $target eq 'tex') {
521: &check_inputs(); # Make sure we have all the data we need
522: ##
523: ## Determine filename
524: my $tmpdir = '/home/httpd/perl/tmp/';
525: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
526: '_'.time.'_'.$$.$randnumber.'_plot';
527: ## Write the plot description to the file
528: &write_gnuplot_file($tmpdir,$filename,$target);
529: $filename = &Apache::lonnet::escape($filename);
530: ## return image tag for the plot
531: if ($target eq 'web') {
532: $result .= <<"ENDIMAGE";
533: <img src = "/cgi-bin/plot.gif?file=$filename.data&output=gif"
534: width = "$plot{'width'}"
535: height = "$plot{'height'}"
536: align = "$plot{'align'}"
537: alt = "$plot{'alttag'}" />
538: ENDIMAGE
539: } elsif ($target eq 'tex') {
540: #might be inside the safe space, register the URL for later
541: &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
542: $result = '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics[width='.$plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.eps}';
543: }
544: } elsif ($target eq 'edit') {
545: $result.=&Apache::edit::tag_end($target,$token);
546: }
547: return $result;
548: }
549:
550:
551: ##--------------------------------------------------------------- xtics
552: sub start_xtics {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
554: my $result='';
555: if ($target eq 'web' || $target eq 'tex') {
556: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
557: $tagstack->[-1]);
558: } elsif ($target eq 'edit') {
559: $result .= &Apache::edit::tag_start($target,$token,'xtics');
560: $result .= &edit_attributes($target,$token,\%tic_defaults,
561: \@tic_edit_order);
562: } elsif ($target eq 'modified') {
563: my $constructtag=&Apache::edit::get_new_args
564: ($token,$parstack,$safeeval,keys(%tic_defaults));
565: if ($constructtag) {
566: $result = &Apache::edit::rebuild_tag($token);
567: }
568: }
569: return $result;
570: }
571:
572: sub end_xtics {
573: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
574: my $result = '';
575: if ($target eq 'web' || $target eq 'tex') {
576: } elsif ($target eq 'edit') {
577: $result.=&Apache::edit::tag_end($target,$token);
578: }
579: return $result;
580: }
581:
582: ##--------------------------------------------------------------- ytics
583: sub start_ytics {
584: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
585: my $result='';
586: if ($target eq 'web' || $target eq 'tex') {
587: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
588: $tagstack->[-1]);
589: } elsif ($target eq 'edit') {
590: $result .= &Apache::edit::tag_start($target,$token,'ytics');
591: $result .= &edit_attributes($target,$token,\%tic_defaults,
592: \@tic_edit_order);
593: } elsif ($target eq 'modified') {
594: my $constructtag=&Apache::edit::get_new_args
595: ($token,$parstack,$safeeval,keys(%tic_defaults));
596: if ($constructtag) {
597: $result = &Apache::edit::rebuild_tag($token);
598: }
599: }
600: return $result;
601: }
602:
603: sub end_ytics {
604: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
605: my $result = '';
606: if ($target eq 'web' || $target eq 'tex') {
607: } elsif ($target eq 'edit') {
608: $result.=&Apache::edit::tag_end($target,$token);
609: }
610: return $result;
611: }
612:
613:
614: ##----------------------------------------------------------------- key
615: sub start_key {
616: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
617: my $result='';
618: if ($target eq 'web' || $target eq 'tex') {
619: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
620: $tagstack->[-1]);
621: } elsif ($target eq 'edit') {
622: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
623: $result .= &edit_attributes($target,$token,\%key_defaults);
624: } elsif ($target eq 'modified') {
625: my $constructtag=&Apache::edit::get_new_args
626: ($token,$parstack,$safeeval,keys(%key_defaults));
627: if ($constructtag) {
628: $result = &Apache::edit::rebuild_tag($token);
629: }
630: }
631: return $result;
632: }
633:
634: sub end_key {
635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
636: my $result = '';
637: if ($target eq 'web' || $target eq 'tex') {
638: } elsif ($target eq 'edit') {
639: $result.=&Apache::edit::tag_end($target,$token);
640: }
641: return $result;
642: }
643:
644: ##------------------------------------------------------------------- title
645: sub start_title {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
647: my $result='';
648: if ($target eq 'web' || $target eq 'tex') {
649: $title = &Apache::lonxml::get_all_text("/title",$parser);
650: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
651: $title =~ s/\n/ /g;
652: if (length($title) > $max_str_len) {
653: $title = substr($title,0,$max_str_len);
654: }
655: } elsif ($target eq 'edit') {
656: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
657: my $text=&Apache::lonxml::get_all_text("/title",$parser);
658: $result.=&Apache::edit::end_row().
659: &Apache::edit::start_spanning_row().
660: &Apache::edit::editline('',$text,'',60);
661: } elsif ($target eq 'modified') {
662: $result.=&Apache::edit::rebuild_tag($token);
663: $result.=&Apache::edit::modifiedfield("/title",$parser);
664: }
665: return $result;
666: }
667:
668: sub end_title {
669: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
670: my $result = '';
671: if ($target eq 'web' || $target eq 'tex') {
672: } elsif ($target eq 'edit') {
673: $result.=&Apache::edit::tag_end($target,$token);
674: }
675: return $result;
676: }
677: ##------------------------------------------------------------------- xlabel
678: sub start_xlabel {
679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
680: my $result='';
681: if ($target eq 'web' || $target eq 'tex') {
682: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
683: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
684: $xlabel =~ s/\n/ /g;
685: if (length($xlabel) > $max_str_len) {
686: $xlabel = substr($xlabel,0,$max_str_len);
687: }
688: } elsif ($target eq 'edit') {
689: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
690: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
691: $result.=&Apache::edit::end_row().
692: &Apache::edit::start_spanning_row().
693: &Apache::edit::editline('',$text,'',60);
694: } elsif ($target eq 'modified') {
695: $result.=&Apache::edit::rebuild_tag($token);
696: $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
697: }
698: return $result;
699: }
700:
701: sub end_xlabel {
702: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
703: my $result = '';
704: if ($target eq 'web' || $target eq 'tex') {
705: } elsif ($target eq 'edit') {
706: $result.=&Apache::edit::tag_end($target,$token);
707: }
708: return $result;
709: }
710:
711: ##------------------------------------------------------------------- ylabel
712: sub start_ylabel {
713: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
714: my $result='';
715: if ($target eq 'web' || $target eq 'tex') {
716: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
717: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
718: $ylabel =~ s/\n/ /g;
719: if (length($ylabel) > $max_str_len) {
720: $ylabel = substr($ylabel,0,$max_str_len);
721: }
722: } elsif ($target eq 'edit') {
723: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
724: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
725: $result .= &Apache::edit::end_row().
726: &Apache::edit::start_spanning_row().
727: &Apache::edit::editline('',$text,'',60);
728: } elsif ($target eq 'modified') {
729: $result.=&Apache::edit::rebuild_tag($token);
730: $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
731: }
732: return $result;
733: }
734:
735: sub end_ylabel {
736: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
737: my $result = '';
738: if ($target eq 'web' || $target eq 'tex') {
739: } elsif ($target eq 'edit') {
740: $result.=&Apache::edit::tag_end($target,$token);
741: }
742: return $result;
743: }
744:
745: ##------------------------------------------------------------------- label
746: sub start_label {
747: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
748: my $result='';
749: if ($target eq 'web' || $target eq 'tex') {
750: my %label;
751: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
752: $tagstack->[-1]);
753: my $text = &Apache::lonxml::get_all_text("/label",$parser);
754: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
755: $text =~ s/\n/ /g;
756: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
757: $label{'text'} = $text;
758: push(@labels,\%label);
759: } elsif ($target eq 'edit') {
760: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
761: $result .= &edit_attributes($target,$token,\%label_defaults);
762: my $text = &Apache::lonxml::get_all_text("/label",$parser);
763: $result .= &Apache::edit::end_row().
764: &Apache::edit::start_spanning_row().
765: &Apache::edit::editline('',$text,'',60);
766: } elsif ($target eq 'modified') {
767: &Apache::edit::get_new_args
768: ($token,$parstack,$safeeval,keys(%label_defaults));
769: $result.=&Apache::edit::rebuild_tag($token);
770: $result.=&Apache::edit::modifiedfield("/label",$parser);
771: }
772: return $result;
773: }
774:
775: sub end_label {
776: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
777: my $result = '';
778: if ($target eq 'web' || $target eq 'tex') {
779: } elsif ($target eq 'edit') {
780: $result.=&Apache::edit::tag_end($target,$token);
781: }
782: return $result;
783: }
784:
785: ##------------------------------------------------------------------- curve
786: sub start_curve {
787: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
788: my $result='';
789: &Apache::lonxml::register('Apache::lonplot',('function','data'));
790: push (@Apache::lonxml::namespace,'curve');
791: if ($target eq 'web' || $target eq 'tex') {
792: my %curve;
793: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
794: $tagstack->[-1]);
795: push (@curves,\%curve);
796: } elsif ($target eq 'edit') {
797: $result .= &Apache::edit::tag_start($target,$token,'Curve');
798: $result .= &help_win($curve_help_text);
799: $result .= &edit_attributes($target,$token,\%curve_defaults,
800: \@curve_edit_order);
801: } elsif ($target eq 'modified') {
802: my $constructtag=&Apache::edit::get_new_args
803: ($token,$parstack,$safeeval,keys(%curve_defaults));
804: if ($constructtag) {
805: $result = &Apache::edit::rebuild_tag($token);
806: $result.= &Apache::edit::handle_insert();
807: }
808: }
809: return $result;
810: }
811:
812: sub end_curve {
813: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
814: my $result = '';
815: pop @Apache::lonxml::namespace;
816: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
817: if ($target eq 'web' || $target eq 'tex') {
818: } elsif ($target eq 'edit') {
819: $result.=&Apache::edit::tag_end($target,$token);
820: }
821: return $result;
822: }
823:
824: ##------------------------------------------------------------ curve function
825: sub start_function {
826: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
827: my $result='';
828: if ($target eq 'web' || $target eq 'tex') {
829: if (exists($curves[-1]->{'data'})) {
830: &Apache::lonxml::warning
831: ('Use of the <b>curve function</b> tag precludes use of '.
832: ' the <b>curve data</b> tag. '.
833: 'The curve data tag will be omitted in favor of the '.
834: 'curve function declaration.');
835: delete $curves[-1]->{'data'} ;
836: }
837: my $function = &Apache::lonxml::get_all_text("/function",$parser);
838: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
839: $curves[-1]->{'function'} = $function;
840: } elsif ($target eq 'edit') {
841: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
842: my $text = &Apache::lonxml::get_all_text("/function",$parser);
843: $result .= &Apache::edit::end_row().
844: &Apache::edit::start_spanning_row().
845: &Apache::edit::editline('',$text,'',60);
846: } elsif ($target eq 'modified') {
847: $result.=&Apache::edit::rebuild_tag($token);
848: $result.=&Apache::edit::modifiedfield("/function",$parser);
849: }
850: return $result;
851: }
852:
853: sub end_function {
854: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
855: my $result = '';
856: if ($target eq 'web' || $target eq 'tex') {
857: } elsif ($target eq 'edit') {
858: $result .= &Apache::edit::end_table();
859: }
860: return $result;
861: }
862:
863: ##------------------------------------------------------------ curve data
864: sub start_data {
865: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
866: my $result='';
867: if ($target eq 'web' || $target eq 'tex') {
868: if (exists($curves[-1]->{'function'})) {
869: &Apache::lonxml::warning
870: ('Use of the <b>curve function</b> tag precludes use of '.
871: ' the <b>curve data</b> tag. '.
872: 'The curve function tag will be omitted in favor of the '.
873: 'curve data declaration.');
874: delete($curves[-1]->{'function'});
875: }
876: my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
877: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
878: # Deal with cases where we're given an array...
879: if ($datatext =~ /^\@/) {
880: $datatext = &Apache::run::run('return "'.$datatext.'"',
881: $safeeval,1);
882: }
883: $datatext =~ s/\s+/ /g;
884: # Need to do some error checking on the @data array -
885: # make sure it's all numbers and make sure each array
886: # is of the same length.
887: my @data;
888: if ($datatext =~ /,/) { # comma deliminated
889: @data = split /,/,$datatext;
890: } else { # Assume it's space seperated.
891: @data = split / /,$datatext;
892: }
893: for (my $i=0;$i<=$#data;$i++) {
894: # Check that it's non-empty
895: if (! defined($data[$i])) {
896: &Apache::lonxml::warning(
897: 'undefined curve data value. Replacing with '.
898: ' pi/e = 1.15572734979092');
899: $data[$i] = 1.15572734979092;
900: }
901: # Check that it's a number
902: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
903: &Apache::lonxml::warning(
904: 'Bad curve data value of '.$data[$i].' Replacing with '.
905: ' pi/e = 1.15572734979092');
906: $data[$i] = 1.15572734979092;
907: }
908: }
909: # complain if the number of data points is not the same as
910: # in previous sets of data.
911: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
912: &Apache::lonxml::warning
913: ('Number of data points is not consistent with previous '.
914: 'number of data points');
915: }
916: push @{$curves[-1]->{'data'}},\@data;
917: } elsif ($target eq 'edit') {
918: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
919: my $text = &Apache::lonxml::get_all_text("/data",$parser);
920: $result .= &Apache::edit::end_row().
921: &Apache::edit::start_spanning_row().
922: &Apache::edit::editline('',$text,'',60);
923: } elsif ($target eq 'modified') {
924: $result.=&Apache::edit::rebuild_tag($token);
925: $result.=&Apache::edit::modifiedfield("/data",$parser);
926: }
927: return $result;
928: }
929:
930: sub end_data {
931: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
932: my $result = '';
933: if ($target eq 'web' || $target eq 'tex') {
934: } elsif ($target eq 'edit') {
935: $result .= &Apache::edit::end_table();
936: }
937: return $result;
938: }
939:
940: ##------------------------------------------------------------------- axis
941: sub start_axis {
942: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
943: my $result='';
944: if ($target eq 'web' || $target eq 'tex') {
945: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
946: $tagstack->[-1]);
947: } elsif ($target eq 'edit') {
948: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
949: $result .= &edit_attributes($target,$token,\%axis_defaults,
950: \@axis_edit_order);
951: } elsif ($target eq 'modified') {
952: my $constructtag=&Apache::edit::get_new_args
953: ($token,$parstack,$safeeval,keys(%axis_defaults));
954: if ($constructtag) {
955: $result = &Apache::edit::rebuild_tag($token);
956: }
957: }
958: return $result;
959: }
960:
961: sub end_axis {
962: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
963: my $result = '';
964: if ($target eq 'web' || $target eq 'tex') {
965: } elsif ($target eq 'edit') {
966: $result.=&Apache::edit::tag_end($target,$token);
967: } elsif ($target eq 'modified') {
968: }
969: return $result;
970: }
971:
972: ###################################################################
973: ## ##
974: ## Utility Functions ##
975: ## ##
976: ###################################################################
977:
978: ##----------------------------------------------------------- set_defaults
979: sub set_defaults {
980: my ($var,$defaults) = @_;
981: my $key;
982: foreach $key (keys(%$defaults)) {
983: $var->{$key} = $defaults->{$key}->{'default'};
984: }
985: }
986:
987: ##------------------------------------------------------------------- misc
988: sub get_attributes{
989: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
990: foreach my $attr (keys(%{$defaults})) {
991: if ($attr eq 'texwidth' || $attr eq 'texfont') {
992: $values->{$attr} =
993: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
994: } else {
995: $values->{$attr} =
996: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
997: }
998: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
999: $values->{$attr} = $defaults->{$attr}->{'default'};
1000: next;
1001: }
1002: my $test = $defaults->{$attr}->{'test'};
1003: if (! &$test($values->{$attr})) {
1004: &Apache::lonxml::warning
1005: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1006: .$defaults->{$attr}->{'default'} );
1007: $values->{$attr} = $defaults->{$attr}->{'default'};
1008: }
1009: }
1010: return ;
1011: }
1012:
1013: ##------------------------------------------------------- write_gnuplot_file
1014: sub write_gnuplot_file {
1015: my ($tmpdir,$filename,$target)= @_;
1016: my $gnuplot_input = '';
1017: my $curve;
1018: my $pt = $plot{'texfont'};
1019: # Collect all the colors
1020: my @Colors;
1021: push @Colors, $plot{'bgcolor'};
1022: push @Colors, $plot{'fgcolor'};
1023: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1024: foreach $curve (@curves) {
1025: push @Colors, ($curve->{'color'} ne '' ?
1026: $curve->{'color'} :
1027: $plot{'fgcolor'} );
1028: }
1029: # set term
1030: if ($target eq 'web') {
1031: $gnuplot_input .= 'set term gif ';
1032: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
1033: $gnuplot_input .= $plot{'font'} . ' ';
1034: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1035: $gnuplot_input .= "@Colors\n";
1036: # set output
1037: $gnuplot_input .= "set output\n";
1038: } elsif ($target eq 'tex') {
1039: $gnuplot_input .= "set term postscript eps monochrome solid \"Helvetica\" $pt \n";
1040: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1041: &Apache::lonnet::unescape($filename).".eps\"\n";
1042: }
1043: # cartesian or polar?
1044: if (lc($plot{'plottype'}) eq 'polar') {
1045: $gnuplot_input .= 'set polar'.$/;
1046: } else {
1047: # Assume Cartesian
1048: }
1049: # grid
1050: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1051: # border
1052: $gnuplot_input .= ($plot{'border'} eq 'on'?
1053: 'set border'.$/ :
1054: 'set noborder'.$/ );
1055: # sampling rate for non-data curves
1056: $gnuplot_input .= "set samples $plot{'samples'}\n";
1057: # title, xlabel, ylabel
1058: # titles
1059: if ($target eq 'tex') {
1060: $gnuplot_input .= "set title \"$title\" font \"Helvetica,".$pt."pt\"\n" if (defined($title)) ;
1061: $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
1062: $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
1063: } else {
1064: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1065: $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
1066: $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
1067: }
1068: # tics
1069: if (%xtics) {
1070: $gnuplot_input .= "set xtics $xtics{'location'} ";
1071: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1072: $gnuplot_input .= "$xtics{'start'}, ";
1073: $gnuplot_input .= "$xtics{'increment'}, ";
1074: $gnuplot_input .= "$xtics{'end'}\n";
1075: if ($xtics{'minorfreq'} != 0) {
1076: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1077: }
1078: }
1079: if (%ytics) {
1080: $gnuplot_input .= "set ytics $ytics{'location'} ";
1081: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1082: $gnuplot_input .= "$ytics{'start'}, ";
1083: $gnuplot_input .= "$ytics{'increment'}, ";
1084: $gnuplot_input .= "$ytics{'end'}\n";
1085: if ($ytics{'minorfreq'} != 0) {
1086: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1087: }
1088: }
1089: # axis
1090: if (%axis) {
1091: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1092: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1093: }
1094: # Key
1095: if (%key) {
1096: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1097: if ($key{'title'} ne '') {
1098: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1099: }
1100: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1101: } else {
1102: $gnuplot_input .= 'set nokey'.$/;
1103: }
1104: # labels
1105: my $label;
1106: foreach $label (@labels) {
1107: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1108: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.' font "Helvetica,'.$pt.'pt"'.$/ ;
1109: }
1110: if ($target eq 'tex') {
1111: $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
1112: $gnuplot_input .="\n";
1113: }
1114: # curves
1115: $gnuplot_input .= 'plot ';
1116: for (my $i = 0;$i<=$#curves;$i++) {
1117: $curve = $curves[$i];
1118: $gnuplot_input.= ', ' if ($i > 0);
1119: if (exists($curve->{'function'})) {
1120: $gnuplot_input.=
1121: $curve->{'function'}.' title "'.
1122: $curve->{'name'}.'" with '.
1123: $curve->{'linestyle'};
1124: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1125: if (($curve->{'linestyle'} eq 'points') ||
1126: ($curve->{'linestyle'} eq 'linespoints') ||
1127: ($curve->{'linestyle'} eq 'errorbars') ||
1128: ($curve->{'linestyle'} eq 'xerrorbars') ||
1129: ($curve->{'linestyle'} eq 'yerrorbars') ||
1130: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1131: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1132: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1133: }
1134: } elsif (exists($curve->{'data'})) {
1135: # Store data values in $datatext
1136: my $datatext = '';
1137: # get new filename
1138: my $datafilename = "$tmpdir/$filename.data.$i";
1139: my $fh=Apache::File->new(">$datafilename");
1140: # Compile data
1141: my @Data = @{$curve->{'data'}};
1142: my @Data0 = @{$Data[0]};
1143: for (my $i =0; $i<=$#Data0; $i++) {
1144: my $dataset;
1145: foreach $dataset (@Data) {
1146: $datatext .= $dataset->[$i] . ' ';
1147: }
1148: $datatext .= $/;
1149: }
1150: # write file
1151: print $fh $datatext;
1152: close ($fh);
1153: # generate gnuplot text
1154: $gnuplot_input.= '"'.$datafilename.'" title "'.
1155: $curve->{'name'}.'" with '.
1156: $curve->{'linestyle'};
1157: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1158: if (($curve->{'linestyle'} eq 'points') ||
1159: ($curve->{'linestyle'} eq 'linespoints') ||
1160: ($curve->{'linestyle'} eq 'errorbars') ||
1161: ($curve->{'linestyle'} eq 'xerrorbars') ||
1162: ($curve->{'linestyle'} eq 'yerrorbars') ||
1163: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1164: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1165: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1166: }
1167: }
1168: }
1169: # Write the output to a file.
1170: my $fh=Apache::File->new(">$tmpdir$filename.data");
1171: print $fh $gnuplot_input;
1172: close($fh);
1173: # That's all folks.
1174: return ;
1175: }
1176:
1177: #---------------------------------------------- check_inputs
1178: sub check_inputs {
1179: ## Note: no inputs, no outputs - this acts only on global variables.
1180: ## Make sure we have all the input we need:
1181: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1182: if (! %key ) {} # No key for this plot, thats okay
1183: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1184: if (! defined($title )) {} # No title for this plot, thats okay
1185: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1186: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1187: if ($#labels < 0) { } # No labels for this plot, thats okay
1188: if ($#curves < 0) {
1189: &Apache::lonxml::warning("No curves specified for plot!!!!");
1190: return '';
1191: }
1192: my $curve;
1193: foreach $curve (@curves) {
1194: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1195: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1196: return '';
1197: }
1198: }
1199: }
1200:
1201: #------------------------------------------------ make_edit
1202: sub edit_attributes {
1203: my ($target,$token,$defaults,$keys) = @_;
1204: my ($result,@keys);
1205: if ($keys && ref($keys) eq 'ARRAY') {
1206: @keys = @$keys;
1207: } else {
1208: @keys = sort(keys(%$defaults));
1209: }
1210: foreach my $attr (@keys) {
1211: # append a ' ' to the description if it doesn't have one already.
1212: my $description = $defaults->{$attr}->{'description'};
1213: $description .= ' ' if ($description !~ / $/);
1214: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1215: $result .= &Apache::edit::text_arg
1216: ($description,$attr,$token,
1217: $defaults->{$attr}->{'size'});
1218: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1219: $result .= &Apache::edit::select_arg
1220: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1221: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1222: $result .= &Apache::edit::select_arg
1223: ($description,$attr,['on','off'],$token);
1224: }
1225: $result .= '<br />';
1226: }
1227: return $result;
1228: }
1229:
1230:
1231: ###################################################################
1232: ## ##
1233: ## Insertion functions for editing plots ##
1234: ## ##
1235: ###################################################################
1236:
1237: sub insert_gnuplot {
1238: my $result = '';
1239: # plot attributes
1240: $result .= "\n<gnuplot ";
1241: foreach my $attr (keys(%gnuplot_defaults)) {
1242: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1243: }
1244: $result .= ">";
1245: # Add the components (most are commented out for simplicity)
1246: # $result .= &insert_key();
1247: # $result .= &insert_axis();
1248: # $result .= &insert_title();
1249: # $result .= &insert_xlabel();
1250: # $result .= &insert_ylabel();
1251: $result .= &insert_curve();
1252: # close up the <gnuplot>
1253: $result .= "\n</gnuplot>";
1254: return $result;
1255: }
1256:
1257: sub insert_tics {
1258: my $result;
1259: $result .= &insert_xtics() . &insert_ytics;
1260: return $result;
1261: }
1262:
1263: sub insert_xtics {
1264: my $result;
1265: $result .= "\n <xtics ";
1266: foreach my $attr (keys(%tic_defaults)) {
1267: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1268: }
1269: $result .= "/>";
1270: return $result;
1271: }
1272:
1273: sub insert_ytics {
1274: my $result;
1275: $result .= "\n <ytics ";
1276: foreach my $attr (keys(%tic_defaults)) {
1277: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1278: }
1279: $result .= "/>";
1280: return $result;
1281: }
1282:
1283: sub insert_key {
1284: my $result;
1285: $result .= "\n <key ";
1286: foreach my $attr (keys(%key_defaults)) {
1287: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1288: }
1289: $result .= " />";
1290: return $result;
1291: }
1292:
1293: sub insert_axis{
1294: my $result;
1295: $result .= "\n <axis ";
1296: foreach my $attr (keys(%axis_defaults)) {
1297: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1298: }
1299: $result .= " />";
1300: return $result;
1301: }
1302:
1303: sub insert_title { return "\n <title></title>"; }
1304: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1305: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1306:
1307: sub insert_label {
1308: my $result;
1309: $result .= "\n <label ";
1310: foreach my $attr (keys(%label_defaults)) {
1311: $result .= "\n $attr=\"".
1312: $label_defaults{$attr}->{'default'}."\"";
1313: }
1314: $result .= "></label>";
1315: return $result;
1316: }
1317:
1318: sub insert_curve {
1319: my $result;
1320: $result .= "\n <curve ";
1321: foreach my $attr (keys(%curve_defaults)) {
1322: $result .= "\n $attr=\"".
1323: $curve_defaults{$attr}->{'default'}."\"";
1324: }
1325: $result .= " >";
1326: $result .= &insert_data().&insert_data()."\n </curve>";
1327: }
1328:
1329: sub insert_function {
1330: my $result;
1331: $result .= "\n <function></function>";
1332: return $result;
1333: }
1334:
1335: sub insert_data {
1336: my $result;
1337: $result .= "\n <data></data>";
1338: return $result;
1339: }
1340:
1341: ##----------------------------------------------------------------------
1342: # Javascript functions to display help for tags
1343:
1344: sub make_javascript {
1345: my $helpwindowwidth = 400;
1346: my $helpwindowheight = 400;
1347: my $result = '';
1348: $result.=<<"ENDFUNCTION";
1349: <script language="JavaScript">
1350: function openWin(text)
1351: {
1352: newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
1353: newWin.document.open("text/html", "replace");
1354: newWin.document.writeln(text);
1355: newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
1356: newWin.document.close();
1357: }
1358: </script>
1359: ENDFUNCTION
1360: return $result;
1361: }
1362:
1363: sub help_win {
1364: my ($helptext)=@_;
1365: $helptext =~ s/\n/ /g;
1366: $helptext =~ s/\'/\\\'/g;
1367: my $result = '';
1368: $result.=<<"ENDWIN";
1369: <table width="100%"><tr><td align="right">
1370: <a href="javascript:openWin('$helptext')">help</a>
1371: </td></tr></table><hr />
1372: ENDWIN
1373: return $result;
1374: }
1375: ##----------------------------------------------------------------------
1376: 1;
1377: __END__
1378:
1379:
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