File:
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lonplot.pm
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1.85:
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Tue Jun 10 18:46:02 2003 UTC (20 years, 11 months ago) by
matthew
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CVS tags:
version_1_0_2,
version_1_0_1,
version_1_0_0,
version_0_99_5,
version_0_99_4,
version_0_99_3,
version_0_99_2,
HEAD
Putting <tag> in html output supresses the display the thing in "<",">"'s.
Who knew?
1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.85 2003/06/10 18:46:02 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 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 Apache::File;
38: use Apache::response;
39: use Apache::lonxml;
40: use Apache::edit;
41:
42: BEGIN {
43: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
44: }
45:
46: ##
47: ## Description of data structures:
48: ##
49: ## %plot %key %axis
50: ## --------------------------
51: ## height title color
52: ## width box xmin
53: ## bgcolor pos xmax
54: ## fgcolor ymin
55: ## transparent ymax
56: ## grid
57: ## border
58: ## font
59: ## align
60: ##
61: ## @labels: $labels[$i] = \%label
62: ## %label: text, xpos, ypos, justify
63: ##
64: ## @curves: $curves[$i] = \%curve
65: ## %curve: name, linestyle, ( function | data )
66: ##
67: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
68: ## [y1,y2,y3,y4] ]
69: ##
70:
71: ###################################################################
72: ## ##
73: ## Tests used in checking the validitity of input ##
74: ## ##
75: ###################################################################
76:
77: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
78: # is longer than this, it will be truncated.
79:
80: my %linestyles =
81: (
82: lines => 2, # Maybe this will be used in the future
83: linespoints => 2, # to check on whether or not they have
84: dots => 2, # supplied enough <data></data> fields
85: points => 2, # to use the given line style. But for
86: steps => 2, # now there are more important things
87: fsteps => 2, # for me to deal with.
88: histeps => 2,
89: errorbars => 3,
90: xerrorbars => [3,4],
91: yerrorbars => [3,4],
92: xyerrorbars => [4,6],
93: boxes => 3,
94: vector => 4
95: );
96:
97: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
98: my $real_test =
99: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
100: my $pos_real_test =
101: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
102: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
103: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
104: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
105: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
106: my $linestyle_test = sub {exists($linestyles{$_[0]})};
107: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
108:
109: ###################################################################
110: ## ##
111: ## Attribute metadata ##
112: ## ##
113: ###################################################################
114: my @gnuplot_edit_order =
115: qw/alttag bgcolor fgcolor height width font transparent grid samples
116: border align texwidth/;
117:
118: my $gnuplot_help_text = <<"ENDPLOTHELP";
119: <p>
120: The <b>gnuplot</b> tag allows an author to design a plot which can
121: be created on the fly. This is intended for use in homework problems
122: where each student needs to see a distinct plot. It can be used in
123: conjunction with a <b>script</b> tag to generate random plots.
124: </p><p>
125: A <b>gnuplot</b> tag can contain the following sub-tags:
126: </p>
127: <dl>
128: <dt> Plot Label
129: <dd> Allows you to place text at a given (x,y) coordinate on the plot.
130: <dt> Plot Title
131: <dd> The title of the plot
132: <dt> Plot Xlabel
133: <dd> The label on the horizontal axis of the plot
134: <dt> Plot Ylabel
135: <dd> The label on the vertical axis of the plot
136: <dt> Plot Axes
137: <dd> allows specification of the x and y ranges displayed in the plot
138: <dt> Plot Key
139: <dd> Lists the functions displayed in the plot.
140: <dt> Plot Curve
141: <dd> Sets the data used in the plot.
142: <dt> Plot Tics
143: <dd> Allows specification of the x and y coordinate 'tics' on the axes.
144: This is mostly used to adjust the grid lines when a grid is displayed.
145: </dl>
146: If you are having trouble with your plot, please read the help
147: available on Plot Curve.
148: ENDPLOTHELP
149:
150: my %gnuplot_defaults =
151: (
152: alttag => {
153: default => 'dynamically generated plot',
154: test => $words_test,
155: description => 'brief description of the plot',
156: edit_type => 'entry',
157: size => '40'
158: },
159: height => {
160: default => 300,
161: test => $int_test,
162: description => 'height of image (pixels)',
163: edit_type => 'entry',
164: size => '10'
165: },
166: width => {
167: default => 400,
168: test => $int_test,
169: description => 'width of image (pixels)',
170: edit_type => 'entry',
171: size => '10'
172: },
173: bgcolor => {
174: default => 'xffffff',
175: test => $color_test,
176: description => 'background color of image (xffffff)',
177: edit_type => 'entry',
178: size => '10'
179: },
180: fgcolor => {
181: default => 'x000000',
182: test => $color_test,
183: description => 'foreground color of image (x000000)',
184: edit_type => 'entry',
185: size => '10'
186: },
187: transparent => {
188: default => 'off',
189: test => $onoff_test,
190: description => 'Transparent image',
191: edit_type => 'onoff'
192: },
193: grid => {
194: default => 'on',
195: test => $onoff_test,
196: description => 'Display grid',
197: edit_type => 'onoff'
198: },
199: border => {
200: default => 'on',
201: test => $onoff_test,
202: description => 'Draw border around plot',
203: edit_type => 'onoff'
204: },
205: font => {
206: default => 'medium',
207: test => $sml_test,
208: description => 'Size of font to use',
209: edit_type => 'choice',
210: choices => ['small','medium','large']
211: },
212: samples => {
213: default => '100',
214: test => $int_test,
215: description => 'Number of samples for non-data plots',
216: edit_type => 'choice',
217: choices => ['100','200','500','1000','2000','5000']
218: },
219: align => {
220: default => 'center',
221: test => sub {$_[0]=~/^(left|right|center)$/},
222: description => 'alignment for image in html',
223: edit_type => 'choice',
224: choices => ['left','right','center']
225: },
226: texwidth => {
227: default => '93',
228: test => $int_test,
229: description => 'Width of plot when printed (mm)',
230: edit_type => 'entry',
231: size => '5'
232: },
233: );
234:
235: my %key_defaults =
236: (
237: title => {
238: default => '',
239: test => $words_test,
240: description => 'Title of key',
241: edit_type => 'entry',
242: size => '40'
243: },
244: box => {
245: default => 'off',
246: test => $onoff_test,
247: description => 'Draw a box around the key?',
248: edit_type => 'onoff'
249: },
250: pos => {
251: default => 'top right',
252: test => $key_pos_test,
253: description => 'position of the key on the plot',
254: edit_type => 'choice',
255: choices => ['top left','top right','bottom left','bottom right',
256: 'outside','below']
257: }
258: );
259:
260: my %label_defaults =
261: (
262: xpos => {
263: default => 0,
264: test => $real_test,
265: description => 'x position of label (graph coordinates)',
266: edit_type => 'entry',
267: size => '10'
268: },
269: ypos => {
270: default => 0,
271: test => $real_test,
272: description => 'y position of label (graph coordinates)',
273: edit_type => 'entry',
274: size => '10'
275: },
276: justify => {
277: default => 'left',
278: test => sub {$_[0]=~/^(left|right|center)$/},
279: description => 'justification of the label text on the plot',
280: edit_type => 'choice',
281: choices => ['left','right','center']
282: }
283: );
284:
285: my @tic_edit_order = ('location','mirror','start','increment','end');
286: my %tic_defaults =
287: (
288: location => {
289: default => 'border',
290: test => sub {$_[0]=~/^(border|axis)$/},
291: description => 'Location of tick marks',
292: edit_type => 'choice',
293: choices => ['border','axis']
294: },
295: mirror => {
296: default => 'on',
297: test => $onoff_test,
298: description => 'mirror ticks on opposite axis?',
299: edit_type => 'onoff'
300: },
301: start => {
302: default => '-10.0',
303: test => $real_test,
304: description => 'Start ticks at',
305: edit_type => 'entry',
306: size => '10'
307: },
308: increment => {
309: default => '1.0',
310: test => $real_test,
311: description => 'Place a tick every',
312: edit_type => 'entry',
313: size => '10'
314: },
315: end => {
316: default => ' 10.0',
317: test => $real_test,
318: description => 'Stop ticks at ',
319: edit_type => 'entry',
320: size => '10'
321: },
322: );
323:
324: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
325: my %axis_defaults =
326: (
327: color => {
328: default => 'x000000',
329: test => $color_test,
330: description => 'color of grid lines (x000000)',
331: edit_type => 'entry',
332: size => '10'
333: },
334: xmin => {
335: default => '-10.0',
336: test => $real_test,
337: description => 'minimum x-value shown in plot',
338: edit_type => 'entry',
339: size => '10'
340: },
341: xmax => {
342: default => ' 10.0',
343: test => $real_test,
344: description => 'maximum x-value shown in plot',
345: edit_type => 'entry',
346: size => '10'
347: },
348: ymin => {
349: default => '-10.0',
350: test => $real_test,
351: description => 'minimum y-value shown in plot',
352: edit_type => 'entry',
353: size => '10'
354: },
355: ymax => {
356: default => ' 10.0',
357: test => $real_test,
358: description => 'maximum y-value shown in plot',
359: edit_type => 'entry',
360: size => '10'
361: }
362: );
363:
364: my $curve_help_text = <<"ENDCURVEHELP";
365: The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
366: There are two ways of entering the information:
367: <dl>
368: <dt> Curve Data
369: <dd> Using a <b>data</b> tag you can specify the numbers used to produce
370: the plot.
371: <p>
372: By default, two <b>data</b> tags will be available in a plot. The
373: first will specify X coordinates of the data and the second will
374: give the Y coordinates of the data. When working with a linestyle that
375: requires more than two data sets, inserting another <b>data</b> tag is
376: required. Unfortunately, you must make sure the <b>data</b> tags appear
377: in the order gnuplot expects the data.
378: </p><p>
379: Specifying the data should usually be done with a perl variable or array,
380: such as \@Xdata and \@Ydata. You may also specify numerical data seperated
381: by commas. Again, the order of the <b>data</b> tags is important. The
382: first tag will be the X data and the second will be the Y data.
383: </p>
384: <dt> Curve Function
385: <dd> The <b>function</b> tag allows you to specify the curve to be
386: plotted as a formula that gnuplot can understand. <b>Be careful using this
387: tag.</b> It is surprisingly easy to give gnuplot a function it cannot deal
388: with properly. Be explicit: 2*sin(2*3.141592*x/4) will work but
389: 2sin(2*3.141592x/4) will not. If you do not receive any errors in the
390: gnuplot data but still do not have an image produced, it is likely there
391: is an error in your <b>function</b> tag.
392: </dl>
393: ENDCURVEHELP
394:
395: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
396:
397: my %curve_defaults =
398: (
399: color => {
400: default => 'x000000',
401: test => $color_test,
402: description => 'color of curve (x000000)',
403: edit_type => 'entry',
404: size => '10'
405: },
406: name => {
407: default => '',
408: test => $words_test,
409: description => 'name of curve to appear in key',
410: edit_type => 'entry',
411: size => '20'
412: },
413: linestyle => {
414: default => 'lines',
415: test => $linestyle_test,
416: description => 'Line style',
417: edit_type => 'choice',
418: choices => [keys(%linestyles)]
419: },
420: # gnuplots term=gif driver does not handle linewidth :(
421: # linewidth => {
422: # default => 1,
423: # test => $int_test,
424: # description => 'Line width (may not apply to all line styles)',
425: # edit_type => 'choice',
426: # choices => [1,2,3,4,5,6,7,8,9,10]
427: # },
428: pointsize => {
429: default => 1,
430: test => $pos_real_test,
431: description => 'point size (may not apply to all line styles)',
432: edit_type => 'entry',
433: size => '5'
434: },
435: pointtype => {
436: default => 1,
437: test => $int_test,
438: description => 'point type (may not apply to all line styles)',
439: edit_type => 'choice',
440: choices => [0,1,2,3,4,5,6]
441: }
442: );
443:
444: ###################################################################
445: ## ##
446: ## parsing and edit rendering ##
447: ## ##
448: ###################################################################
449: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
450:
451: sub start_gnuplot {
452: %plot = (); %key = (); %axis = ();
453: $title = undef; $xlabel = undef; $ylabel = undef;
454: $#labels = -1; $#curves = -1;
455: %xtics = (); %ytics = ();
456: #
457: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
458: my $result='';
459: &Apache::lonxml::register('Apache::lonplot',
460: ('title','xlabel','ylabel','key','axis','label','curve',
461: 'xtics','ytics'));
462: push (@Apache::lonxml::namespace,'lonplot');
463: if ($target eq 'web' || $target eq 'tex') {
464: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
465: $tagstack->[-1]);
466: } elsif ($target eq 'edit') {
467: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
468: $result .= &make_javascript();
469: $result .= &help_win($gnuplot_help_text);
470: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
471: \@gnuplot_edit_order);
472: } elsif ($target eq 'modified') {
473: my $constructtag=&Apache::edit::get_new_args
474: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
475: if ($constructtag) {
476: $result = &Apache::edit::rebuild_tag($token);
477: }
478: }
479: return $result;
480: }
481:
482: sub end_gnuplot {
483: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
484: pop @Apache::lonxml::namespace;
485: &Apache::lonxml::deregister('Apache::lonplot',
486: ('title','xlabel','ylabel','key','axis','label','curve'));
487: my $result = '';
488: my $randnumber;
489: # need to call rand everytime start_script would evaluate, as the
490: # safe space rand number generator and the global rand generator
491: # are not seperate
492: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
493: $target eq 'answer') {
494: $randnumber=int(rand(1000));
495: }
496: if ($target eq 'web' || $target eq 'tex') {
497: &check_inputs(); # Make sure we have all the data we need
498: ##
499: ## Determine filename
500: my $tmpdir = '/home/httpd/perl/tmp/';
501: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
502: '_'.time.'_'.$$.$randnumber.'_plot';
503: ## Write the plot description to the file
504: &write_gnuplot_file($tmpdir,$filename,$target);
505: $filename = &Apache::lonnet::escape($filename);
506: ## return image tag for the plot
507: if ($target eq 'web') {
508: $result .= <<"ENDIMAGE";
509: <img src = "/cgi-bin/plot.gif?file=$filename.data&output=gif"
510: width = "$plot{'width'}"
511: height = "$plot{'height'}"
512: align = "$plot{'align'}"
513: alt = "$plot{'alttag'}" />
514: ENDIMAGE
515: } elsif ($target eq 'tex') {
516: &Apache::lonnet::ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
517:
518: $result = '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics[width='.$plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.eps}';
519: }
520: } elsif ($target eq 'edit') {
521: $result.=&Apache::edit::tag_end($target,$token);
522: }
523: return $result;
524: }
525:
526:
527: ##--------------------------------------------------------------- xtics
528: sub start_xtics {
529: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
530: my $result='';
531: if ($target eq 'web' || $target eq 'tex') {
532: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
533: $tagstack->[-1]);
534: } elsif ($target eq 'edit') {
535: $result .= &Apache::edit::tag_start($target,$token,'xtics');
536: $result .= &edit_attributes($target,$token,\%tic_defaults,
537: \@tic_edit_order);
538: } elsif ($target eq 'modified') {
539: my $constructtag=&Apache::edit::get_new_args
540: ($token,$parstack,$safeeval,keys(%tic_defaults));
541: if ($constructtag) {
542: $result = &Apache::edit::rebuild_tag($token);
543: }
544: }
545: return $result;
546: }
547:
548: sub end_xtics {
549: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
550: my $result = '';
551: if ($target eq 'web' || $target eq 'tex') {
552: } elsif ($target eq 'edit') {
553: $result.=&Apache::edit::tag_end($target,$token);
554: }
555: return $result;
556: }
557:
558: ##--------------------------------------------------------------- ytics
559: sub start_ytics {
560: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
561: my $result='';
562: if ($target eq 'web' || $target eq 'tex') {
563: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
564: $tagstack->[-1]);
565: } elsif ($target eq 'edit') {
566: $result .= &Apache::edit::tag_start($target,$token,'ytics');
567: $result .= &edit_attributes($target,$token,\%tic_defaults,
568: \@tic_edit_order);
569: } elsif ($target eq 'modified') {
570: my $constructtag=&Apache::edit::get_new_args
571: ($token,$parstack,$safeeval,keys(%tic_defaults));
572: if ($constructtag) {
573: $result = &Apache::edit::rebuild_tag($token);
574: }
575: }
576: return $result;
577: }
578:
579: sub end_ytics {
580: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
581: my $result = '';
582: if ($target eq 'web' || $target eq 'tex') {
583: } elsif ($target eq 'edit') {
584: $result.=&Apache::edit::tag_end($target,$token);
585: }
586: return $result;
587: }
588:
589:
590: ##----------------------------------------------------------------- key
591: sub start_key {
592: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
593: my $result='';
594: if ($target eq 'web' || $target eq 'tex') {
595: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
596: $tagstack->[-1]);
597: } elsif ($target eq 'edit') {
598: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
599: $result .= &edit_attributes($target,$token,\%key_defaults);
600: } elsif ($target eq 'modified') {
601: my $constructtag=&Apache::edit::get_new_args
602: ($token,$parstack,$safeeval,keys(%key_defaults));
603: if ($constructtag) {
604: $result = &Apache::edit::rebuild_tag($token);
605: }
606: }
607: return $result;
608: }
609:
610: sub end_key {
611: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
612: my $result = '';
613: if ($target eq 'web' || $target eq 'tex') {
614: } elsif ($target eq 'edit') {
615: $result.=&Apache::edit::tag_end($target,$token);
616: }
617: return $result;
618: }
619:
620: ##------------------------------------------------------------------- title
621: sub start_title {
622: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
623: my $result='';
624: if ($target eq 'web' || $target eq 'tex') {
625: $title = &Apache::lonxml::get_all_text("/title",$parser);
626: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
627: $title =~ s/\n/ /g;
628: if (length($title) > $max_str_len) {
629: $title = substr($title,0,$max_str_len);
630: }
631: } elsif ($target eq 'edit') {
632: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
633: my $text=&Apache::lonxml::get_all_text("/title",$parser);
634: $result.=&Apache::edit::end_row().
635: &Apache::edit::start_spanning_row().
636: &Apache::edit::editline('',$text,'',60);
637: } elsif ($target eq 'modified') {
638: my $text=$$parser[-1]->get_text("/title");
639: $result.=&Apache::edit::rebuild_tag($token);
640: $result.=&Apache::edit::modifiedfield($token);
641: }
642: return $result;
643: }
644:
645: sub end_title {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
647: my $result = '';
648: if ($target eq 'web' || $target eq 'tex') {
649: } elsif ($target eq 'edit') {
650: $result.=&Apache::edit::tag_end($target,$token);
651: }
652: return $result;
653: }
654: ##------------------------------------------------------------------- xlabel
655: sub start_xlabel {
656: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
657: my $result='';
658: if ($target eq 'web' || $target eq 'tex') {
659: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
660: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
661: $xlabel =~ s/\n/ /g;
662: if (length($xlabel) > $max_str_len) {
663: $xlabel = substr($xlabel,0,$max_str_len);
664: }
665: } elsif ($target eq 'edit') {
666: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
667: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
668: $result.=&Apache::edit::end_row().
669: &Apache::edit::start_spanning_row().
670: &Apache::edit::editline('',$text,'',60);
671: } elsif ($target eq 'modified') {
672: my $text=$$parser[-1]->get_text("/xlabel");
673: $result.=&Apache::edit::rebuild_tag($token);
674: $result.=&Apache::edit::modifiedfield($token);
675: }
676: return $result;
677: }
678:
679: sub end_xlabel {
680: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
681: my $result = '';
682: if ($target eq 'web' || $target eq 'tex') {
683: } elsif ($target eq 'edit') {
684: $result.=&Apache::edit::tag_end($target,$token);
685: }
686: return $result;
687: }
688:
689: ##------------------------------------------------------------------- ylabel
690: sub start_ylabel {
691: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
692: my $result='';
693: if ($target eq 'web' || $target eq 'tex') {
694: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
695: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
696: $ylabel =~ s/\n/ /g;
697: if (length($ylabel) > $max_str_len) {
698: $ylabel = substr($ylabel,0,$max_str_len);
699: }
700: } elsif ($target eq 'edit') {
701: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
702: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
703: $result .= &Apache::edit::end_row().
704: &Apache::edit::start_spanning_row().
705: &Apache::edit::editline('',$text,'',60);
706: } elsif ($target eq 'modified') {
707: my $text=$$parser[-1]->get_text("/ylabel");
708: $result.=&Apache::edit::rebuild_tag($token);
709: $result.=&Apache::edit::modifiedfield($token);
710: }
711: return $result;
712: }
713:
714: sub end_ylabel {
715: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
716: my $result = '';
717: if ($target eq 'web' || $target eq 'tex') {
718: } elsif ($target eq 'edit') {
719: $result.=&Apache::edit::tag_end($target,$token);
720: }
721: return $result;
722: }
723:
724: ##------------------------------------------------------------------- label
725: sub start_label {
726: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
727: my $result='';
728: if ($target eq 'web' || $target eq 'tex') {
729: my %label;
730: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
731: $tagstack->[-1]);
732: my $text = &Apache::lonxml::get_all_text("/label",$parser);
733: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
734: $text =~ s/\n/ /g;
735: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
736: $label{'text'} = $text;
737: push(@labels,\%label);
738: } elsif ($target eq 'edit') {
739: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
740: $result .= &edit_attributes($target,$token,\%label_defaults);
741: my $text = &Apache::lonxml::get_all_text("/label",$parser);
742: $result .= &Apache::edit::end_row().
743: &Apache::edit::start_spanning_row().
744: &Apache::edit::editline('',$text,'',60);
745: } elsif ($target eq 'modified') {
746: &Apache::edit::get_new_args
747: ($token,$parstack,$safeeval,keys(%label_defaults));
748: $result.=&Apache::edit::rebuild_tag($token);
749: my $text=$$parser[-1]->get_text("/label");
750: $result.=&Apache::edit::modifiedfield($token);
751: }
752: return $result;
753: }
754:
755: sub end_label {
756: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
757: my $result = '';
758: if ($target eq 'web' || $target eq 'tex') {
759: } elsif ($target eq 'edit') {
760: $result.=&Apache::edit::tag_end($target,$token);
761: }
762: return $result;
763: }
764:
765: ##------------------------------------------------------------------- curve
766: sub start_curve {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
768: my $result='';
769: &Apache::lonxml::register('Apache::lonplot',('function','data'));
770: push (@Apache::lonxml::namespace,'curve');
771: if ($target eq 'web' || $target eq 'tex') {
772: my %curve;
773: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
774: $tagstack->[-1]);
775: push (@curves,\%curve);
776: } elsif ($target eq 'edit') {
777: $result .= &Apache::edit::tag_start($target,$token,'Curve');
778: $result .= &help_win($curve_help_text);
779: $result .= &edit_attributes($target,$token,\%curve_defaults,
780: \@curve_edit_order);
781: } elsif ($target eq 'modified') {
782: my $constructtag=&Apache::edit::get_new_args
783: ($token,$parstack,$safeeval,keys(%curve_defaults));
784: if ($constructtag) {
785: $result = &Apache::edit::rebuild_tag($token);
786: $result.= &Apache::edit::handle_insert();
787: }
788: }
789: return $result;
790: }
791:
792: sub end_curve {
793: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
794: my $result = '';
795: pop @Apache::lonxml::namespace;
796: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
797: if ($target eq 'web' || $target eq 'tex') {
798: } elsif ($target eq 'edit') {
799: $result.=&Apache::edit::tag_end($target,$token);
800: }
801: return $result;
802: }
803:
804: ##------------------------------------------------------------ curve function
805: sub start_function {
806: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
807: my $result='';
808: if ($target eq 'web' || $target eq 'tex') {
809: if (exists($curves[-1]->{'data'})) {
810: &Apache::lonxml::warning
811: ('Use of the <b>curve function</b> tag precludes use of '.
812: ' the <b>curve data</b> tag. '.
813: 'The curve data tag will be omitted in favor of the '.
814: 'curve function declaration.');
815: delete $curves[-1]->{'data'} ;
816: }
817: my $function = &Apache::lonxml::get_all_text("/function",$parser);
818: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
819: $curves[-1]->{'function'} = $function;
820: } elsif ($target eq 'edit') {
821: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
822: my $text = &Apache::lonxml::get_all_text("/function",$parser);
823: $result .= &Apache::edit::end_row().
824: &Apache::edit::start_spanning_row().
825: &Apache::edit::editline('',$text,'',60);
826: } elsif ($target eq 'modified') {
827: $result.=&Apache::edit::rebuild_tag($token);
828: my $text=$$parser[-1]->get_text("/function");
829: $result.=&Apache::edit::modifiedfield($token);
830: }
831: return $result;
832: }
833:
834: sub end_function {
835: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
836: my $result = '';
837: if ($target eq 'web' || $target eq 'tex') {
838: } elsif ($target eq 'edit') {
839: $result .= &Apache::edit::end_table();
840: }
841: return $result;
842: }
843:
844: ##------------------------------------------------------------ curve data
845: sub start_data {
846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
847: my $result='';
848: if ($target eq 'web' || $target eq 'tex') {
849: if (exists($curves[-1]->{'function'})) {
850: &Apache::lonxml::warning
851: ('Use of the <b>curve function</b> tag precludes use of '.
852: ' the <b>curve data</b> tag. '.
853: 'The curve function tag will be omitted in favor of the '.
854: 'curve data declaration.');
855: delete($curves[-1]->{'function'});
856: }
857: my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
858: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
859: # Deal with cases where we're given an array...
860: if ($datatext =~ /^\@/) {
861: $datatext = &Apache::run::run('return "'.$datatext.'"',
862: $safeeval,1);
863: }
864: $datatext =~ s/\s+/ /g;
865: # Need to do some error checking on the @data array -
866: # make sure it's all numbers and make sure each array
867: # is of the same length.
868: my @data;
869: if ($datatext =~ /,/) { # comma deliminated
870: @data = split /,/,$datatext;
871: } else { # Assume it's space seperated.
872: @data = split / /,$datatext;
873: }
874: for (my $i=0;$i<=$#data;$i++) {
875: # Check that it's non-empty
876: if (! defined($data[$i])) {
877: &Apache::lonxml::warning(
878: 'undefined curve data value. Replacing with '.
879: ' pi/e = 1.15572734979092');
880: $data[$i] = 1.15572734979092;
881: }
882: # Check that it's a number
883: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
884: &Apache::lonxml::warning(
885: 'Bad curve data value of '.$data[$i].' Replacing with '.
886: ' pi/e = 1.15572734979092');
887: $data[$i] = 1.15572734979092;
888: }
889: }
890: # complain if the number of data points is not the same as
891: # in previous sets of data.
892: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
893: &Apache::lonxml::warning
894: ('Number of data points is not consistent with previous '.
895: 'number of data points');
896: }
897: push @{$curves[-1]->{'data'}},\@data;
898: } elsif ($target eq 'edit') {
899: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
900: my $text = &Apache::lonxml::get_all_text("/data",$parser);
901: $result .= &Apache::edit::end_row().
902: &Apache::edit::start_spanning_row().
903: &Apache::edit::editline('',$text,'',60);
904: } elsif ($target eq 'modified') {
905: $result.=&Apache::edit::rebuild_tag($token);
906: my $text=$$parser[-1]->get_text("/data");
907: $result.=&Apache::edit::modifiedfield($token);
908: }
909: return $result;
910: }
911:
912: sub end_data {
913: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
914: my $result = '';
915: if ($target eq 'web' || $target eq 'tex') {
916: } elsif ($target eq 'edit') {
917: $result .= &Apache::edit::end_table();
918: }
919: return $result;
920: }
921:
922: ##------------------------------------------------------------------- axis
923: sub start_axis {
924: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
925: my $result='';
926: if ($target eq 'web' || $target eq 'tex') {
927: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
928: $tagstack->[-1]);
929: } elsif ($target eq 'edit') {
930: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
931: $result .= &edit_attributes($target,$token,\%axis_defaults,
932: \@axis_edit_order);
933: } elsif ($target eq 'modified') {
934: my $constructtag=&Apache::edit::get_new_args
935: ($token,$parstack,$safeeval,keys(%axis_defaults));
936: if ($constructtag) {
937: $result = &Apache::edit::rebuild_tag($token);
938: }
939: }
940: return $result;
941: }
942:
943: sub end_axis {
944: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
945: my $result = '';
946: if ($target eq 'web' || $target eq 'tex') {
947: } elsif ($target eq 'edit') {
948: $result.=&Apache::edit::tag_end($target,$token);
949: } elsif ($target eq 'modified') {
950: }
951: return $result;
952: }
953:
954: ###################################################################
955: ## ##
956: ## Utility Functions ##
957: ## ##
958: ###################################################################
959:
960: ##----------------------------------------------------------- set_defaults
961: sub set_defaults {
962: my ($var,$defaults) = @_;
963: my $key;
964: foreach $key (keys(%$defaults)) {
965: $var->{$key} = $defaults->{$key}->{'default'};
966: }
967: }
968:
969: ##------------------------------------------------------------------- misc
970: sub get_attributes{
971: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
972: foreach my $attr (keys(%{$defaults})) {
973: $values->{$attr} =
974: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
975: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
976: $values->{$attr} = $defaults->{$attr}->{'default'};
977: next;
978: }
979: my $test = $defaults->{$attr}->{'test'};
980: if (! &$test($values->{$attr})) {
981: &Apache::lonxml::warning
982: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
983: .$defaults->{$attr}->{'default'} );
984: $values->{$attr} = $defaults->{$attr}->{'default'};
985: }
986: }
987: return ;
988: }
989:
990: ##------------------------------------------------------- write_gnuplot_file
991: sub write_gnuplot_file {
992: my ($tmpdir,$filename,$target)= @_;
993: my $gnuplot_input = '';
994: my $curve;
995: # Collect all the colors
996: my @Colors;
997: push @Colors, $plot{'bgcolor'};
998: push @Colors, $plot{'fgcolor'};
999: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1000: foreach $curve (@curves) {
1001: push @Colors, ($curve->{'color'} ne '' ?
1002: $curve->{'color'} :
1003: $plot{'fgcolor'} );
1004: }
1005: # set term
1006: if ($target eq 'web') {
1007: $gnuplot_input .= 'set term gif ';
1008: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
1009: $gnuplot_input .= $plot{'font'} . ' ';
1010: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1011: $gnuplot_input .= "@Colors\n";
1012: # set output
1013: $gnuplot_input .= "set output\n";
1014: } elsif ($target eq 'tex') {
1015: $gnuplot_input .= "set term postscript eps monochrome solid\n";
1016: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1017: &Apache::lonnet::unescape($filename).".eps\"\n";
1018: }
1019: # grid
1020: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1021: # border
1022: $gnuplot_input .= ($plot{'border'} eq 'on'?
1023: 'set border'.$/ :
1024: 'set noborder'.$/ );
1025: # sampling rate for non-data curves
1026: $gnuplot_input .= "set samples $plot{'samples'}\n";
1027: # title, xlabel, ylabel
1028: # titles
1029: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
1030: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
1031: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
1032: # tics
1033: if (%xtics) {
1034: $gnuplot_input .= "set xtics $xtics{'location'} ";
1035: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1036: $gnuplot_input .= "$xtics{'start'}, ";
1037: $gnuplot_input .= "$xtics{'increment'}, ";
1038: $gnuplot_input .= "$xtics{'end'}\n";
1039: }
1040: if (%ytics) {
1041: $gnuplot_input .= "set ytics $ytics{'location'} ";
1042: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1043: $gnuplot_input .= "$ytics{'start'}, ";
1044: $gnuplot_input .= "$ytics{'increment'}, ";
1045: $gnuplot_input .= "$ytics{'end'}\n";
1046: }
1047: # axis
1048: if (%axis) {
1049: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1050: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1051: }
1052: # Key
1053: if (%key) {
1054: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1055: if ($key{'title'} ne '') {
1056: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1057: }
1058: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1059: } else {
1060: $gnuplot_input .= 'set nokey'.$/;
1061: }
1062: # labels
1063: my $label;
1064: foreach $label (@labels) {
1065: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1066: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
1067: }
1068: if ($target eq 'tex') {
1069: $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
1070: $gnuplot_input .="\n";
1071: }
1072: # curves
1073: $gnuplot_input .= 'plot ';
1074: for (my $i = 0;$i<=$#curves;$i++) {
1075: $curve = $curves[$i];
1076: $gnuplot_input.= ', ' if ($i > 0);
1077: if (exists($curve->{'function'})) {
1078: $gnuplot_input.=
1079: $curve->{'function'}.' title "'.
1080: $curve->{'name'}.'" with '.
1081: $curve->{'linestyle'};
1082: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1083: if (($curve->{'linestyle'} eq 'points') ||
1084: ($curve->{'linestyle'} eq 'linespoints') ||
1085: ($curve->{'linestyle'} eq 'errorbars') ||
1086: ($curve->{'linestyle'} eq 'xerrorbars') ||
1087: ($curve->{'linestyle'} eq 'yerrorbars') ||
1088: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1089: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1090: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1091: }
1092: } elsif (exists($curve->{'data'})) {
1093: # Store data values in $datatext
1094: my $datatext = '';
1095: # get new filename
1096: my $datafilename = "$tmpdir/$filename.data.$i";
1097: my $fh=Apache::File->new(">$datafilename");
1098: # Compile data
1099: my @Data = @{$curve->{'data'}};
1100: my @Data0 = @{$Data[0]};
1101: for (my $i =0; $i<=$#Data0; $i++) {
1102: my $dataset;
1103: foreach $dataset (@Data) {
1104: $datatext .= $dataset->[$i] . ' ';
1105: }
1106: $datatext .= $/;
1107: }
1108: # write file
1109: print $fh $datatext;
1110: close ($fh);
1111: # generate gnuplot text
1112: $gnuplot_input.= '"'.$datafilename.'" title "'.
1113: $curve->{'name'}.'" with '.
1114: $curve->{'linestyle'};
1115: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1116: if (($curve->{'linestyle'} eq 'points') ||
1117: ($curve->{'linestyle'} eq 'linespoints') ||
1118: ($curve->{'linestyle'} eq 'errorbars') ||
1119: ($curve->{'linestyle'} eq 'xerrorbars') ||
1120: ($curve->{'linestyle'} eq 'yerrorbars') ||
1121: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1122: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1123: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1124: }
1125: }
1126: }
1127: # Write the output to a file.
1128: my $fh=Apache::File->new(">$tmpdir$filename.data");
1129: print $fh $gnuplot_input;
1130: close($fh);
1131: # That's all folks.
1132: return ;
1133: }
1134:
1135: #---------------------------------------------- check_inputs
1136: sub check_inputs {
1137: ## Note: no inputs, no outputs - this acts only on global variables.
1138: ## Make sure we have all the input we need:
1139: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1140: if (! %key ) {} # No key for this plot, thats okay
1141: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1142: if (! defined($title )) {} # No title for this plot, thats okay
1143: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1144: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1145: if ($#labels < 0) { } # No labels for this plot, thats okay
1146: if ($#curves < 0) {
1147: &Apache::lonxml::warning("No curves specified for plot!!!!");
1148: return '';
1149: }
1150: my $curve;
1151: foreach $curve (@curves) {
1152: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1153: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1154: return '';
1155: }
1156: }
1157: }
1158:
1159: #------------------------------------------------ make_edit
1160: sub edit_attributes {
1161: my ($target,$token,$defaults,$keys) = @_;
1162: my ($result,@keys);
1163: if ($keys && ref($keys) eq 'ARRAY') {
1164: @keys = @$keys;
1165: } else {
1166: @keys = sort(keys(%$defaults));
1167: }
1168: foreach my $attr (@keys) {
1169: # append a ' ' to the description if it doesn't have one already.
1170: my $description = $defaults->{$attr}->{'description'};
1171: $description .= ' ' if ($description !~ / $/);
1172: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1173: $result .= &Apache::edit::text_arg
1174: ($description,$attr,$token,
1175: $defaults->{$attr}->{'size'});
1176: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1177: $result .= &Apache::edit::select_arg
1178: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1179: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1180: $result .= &Apache::edit::select_arg
1181: ($description,$attr,['on','off'],$token);
1182: }
1183: $result .= '<br />';
1184: }
1185: return $result;
1186: }
1187:
1188:
1189: ###################################################################
1190: ## ##
1191: ## Insertion functions for editing plots ##
1192: ## ##
1193: ###################################################################
1194:
1195: sub insert_gnuplot {
1196: my $result = '';
1197: # plot attributes
1198: $result .= "\n<gnuplot ";
1199: foreach my $attr (keys(%gnuplot_defaults)) {
1200: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1201: }
1202: $result .= ">";
1203: # Add the components (most are commented out for simplicity)
1204: # $result .= &insert_key();
1205: # $result .= &insert_axis();
1206: # $result .= &insert_title();
1207: # $result .= &insert_xlabel();
1208: # $result .= &insert_ylabel();
1209: $result .= &insert_curve();
1210: # close up the <gnuplot>
1211: $result .= "\n</gnuplot>";
1212: return $result;
1213: }
1214:
1215: sub insert_tics {
1216: my $result;
1217: $result .= &insert_xtics() . &insert_ytics;
1218: return $result;
1219: }
1220:
1221: sub insert_xtics {
1222: my $result;
1223: $result .= "\n <xtics ";
1224: foreach my $attr (keys(%tic_defaults)) {
1225: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1226: }
1227: $result .= "/>";
1228: return $result;
1229: }
1230:
1231: sub insert_ytics {
1232: my $result;
1233: $result .= "\n <ytics ";
1234: foreach my $attr (keys(%tic_defaults)) {
1235: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1236: }
1237: $result .= "/>";
1238: return $result;
1239: }
1240:
1241: sub insert_key {
1242: my $result;
1243: $result .= "\n <key ";
1244: foreach my $attr (keys(%key_defaults)) {
1245: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1246: }
1247: $result .= " />";
1248: return $result;
1249: }
1250:
1251: sub insert_axis{
1252: my $result;
1253: $result .= "\n <axis ";
1254: foreach my $attr (keys(%axis_defaults)) {
1255: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1256: }
1257: $result .= " />";
1258: return $result;
1259: }
1260:
1261: sub insert_title { return "\n <title></title>"; }
1262: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1263: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1264:
1265: sub insert_label {
1266: my $result;
1267: $result .= "\n <label ";
1268: foreach my $attr (keys(%label_defaults)) {
1269: $result .= "\n $attr=\"".
1270: $label_defaults{$attr}->{'default'}."\"";
1271: }
1272: $result .= "></label>";
1273: return $result;
1274: }
1275:
1276: sub insert_curve {
1277: my $result;
1278: $result .= "\n <curve ";
1279: foreach my $attr (keys(%curve_defaults)) {
1280: $result .= "\n $attr=\"".
1281: $curve_defaults{$attr}->{'default'}."\"";
1282: }
1283: $result .= " >";
1284: $result .= &insert_data().&insert_data()."\n </curve>";
1285: }
1286:
1287: sub insert_function {
1288: my $result;
1289: $result .= "\n <function></function>";
1290: return $result;
1291: }
1292:
1293: sub insert_data {
1294: my $result;
1295: $result .= "\n <data></data>";
1296: return $result;
1297: }
1298:
1299: ##----------------------------------------------------------------------
1300: # Javascript functions to display help for tags
1301:
1302: sub make_javascript {
1303: my $helpwindowwidth = 400;
1304: my $helpwindowheight = 400;
1305: my $result = '';
1306: $result.=<<"ENDFUNCTION";
1307: <script language="JavaScript">
1308: function openWin(text)
1309: {
1310: newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
1311: newWin.document.open("text/html", "replace");
1312: newWin.document.writeln(text);
1313: newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
1314: newWin.document.close();
1315: }
1316: </script>
1317: ENDFUNCTION
1318: return $result;
1319: }
1320:
1321: sub help_win {
1322: my ($helptext)=@_;
1323: $helptext =~ s/\n/ /g;
1324: $helptext =~ s/\'/\\\'/g;
1325: my $result = '';
1326: $result.=<<"ENDWIN";
1327: <table width="100%"><tr><td align="right">
1328: <a href="javascript:openWin('$helptext')">help</a>
1329: </td></tr></table><hr />
1330: ENDWIN
1331: return $result;
1332: }
1333: ##----------------------------------------------------------------------
1334: 1;
1335: __END__
1336:
1337:
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