1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.66 2002/04/24 16:38:40 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;$_[0]=~/^x[\da-f]{6}$/};
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 border align/;
116:
117: my $gnuplot_help_text = <<"ENDPLOTHELP";
118: <p>
119: The <b>gnuplot</b> tag allows an author to design a plot which can
120: be created on the fly. This is intended for use in homework problems
121: where each student needs to see a distinct plot. It can be used in
122: conjunction with a <b>script</b> tag to generate random plots.
123: </p><p>
124: A <b>gnuplot</b> tag can contain the following sub-tags:
125: </p>
126: <dl>
127: <dt> Plot Label
128: <dd> Allows you to place text at a given (x,y) coordinate on the plot.
129: <dt> Plot Title
130: <dd> The title of the plot
131: <dt> Plot Xlabel
132: <dd> The label on the horizontal axis of the plot
133: <dt> Plot Ylabel
134: <dd> The label on the vertical axis of the plot
135: <dt> Plot Axes
136: <dd> allows specification of the x and y ranges displayed in the plot
137: <dt> Plot Key
138: <dd> Lists the functions displayed in the plot.
139: <dt> Plot Curve
140: <dd> Sets the data used in the plot.
141: <dt> Plot Tics
142: <dd> Allows specification of the x and y coordinate 'tics' on the axes.
143: This is mostly used to adjust the grid lines when a grid is displayed.
144: </dl>
145: If you are having trouble with your plot, please read the help
146: available on Plot Curve.
147: ENDPLOTHELP
148:
149: my %gnuplot_defaults =
150: (
151: alttag => {
152: default => 'dynamically generated plot',
153: test => $words_test,
154: description => 'brief description of the plot',
155: edit_type => 'entry',
156: size => '40'
157: },
158: height => {
159: default => 300,
160: test => $int_test,
161: description => 'height of image (pixels)',
162: edit_type => 'entry',
163: size => '10'
164: },
165: width => {
166: default => 400,
167: test => $int_test,
168: description => 'width of image (pixels)',
169: edit_type => 'entry',
170: size => '10'
171: },
172: bgcolor => {
173: default => 'xffffff',
174: test => $color_test,
175: description => 'background color of image (xffffff)',
176: edit_type => 'entry',
177: size => '10'
178: },
179: fgcolor => {
180: default => 'x000000',
181: test => $color_test,
182: description => 'foreground color of image (x000000)',
183: edit_type => 'entry',
184: size => '10'
185: },
186: transparent => {
187: default => 'off',
188: test => $onoff_test,
189: description => 'Transparent image',
190: edit_type => 'onoff'
191: },
192: grid => {
193: default => 'on',
194: test => $onoff_test,
195: description => 'Display grid',
196: edit_type => 'onoff'
197: },
198: border => {
199: default => 'on',
200: test => $onoff_test,
201: description => 'Draw border around plot',
202: edit_type => 'onoff'
203: },
204: font => {
205: default => 'medium',
206: test => $sml_test,
207: description => 'Size of font to use',
208: edit_type => 'choice',
209: choices => ['small','medium','large']
210: },
211: align => {
212: default => 'center',
213: test => sub {$_[0]=~/^(left|right|center)$/},
214: description => 'alignment for image in html',
215: edit_type => 'choice',
216: choices => ['left','right','center']
217: }
218: );
219:
220: my %key_defaults =
221: (
222: title => {
223: default => '',
224: test => $words_test,
225: description => 'Title of key',
226: edit_type => 'entry',
227: size => '40'
228: },
229: box => {
230: default => 'off',
231: test => $onoff_test,
232: description => 'Draw a box around the key?',
233: edit_type => 'onoff'
234: },
235: pos => {
236: default => 'top right',
237: test => $key_pos_test,
238: description => 'position of the key on the plot',
239: edit_type => 'choice',
240: choices => ['top left','top right','bottom left','bottom right',
241: 'outside','below']
242: }
243: );
244:
245: my %label_defaults =
246: (
247: xpos => {
248: default => 0,
249: test => $real_test,
250: description => 'x position of label (graph coordinates)',
251: edit_type => 'entry',
252: size => '10'
253: },
254: ypos => {
255: default => 0,
256: test => $real_test,
257: description => 'y position of label (graph coordinates)',
258: edit_type => 'entry',
259: size => '10'
260: },
261: justify => {
262: default => 'left',
263: test => sub {$_[0]=~/^(left|right|center)$/},
264: description => 'justification of the label text on the plot',
265: edit_type => 'choice',
266: choices => ['left','right','center']
267: }
268: );
269:
270: my @tic_edit_order = ('location','mirror','start','increment','end');
271: my %tic_defaults =
272: (
273: location => {
274: default => 'border',
275: test => sub {$_[0]=~/^(border|axis)$/},
276: description => 'Location of tick marks',
277: edit_type => 'choice',
278: choices => ['border','axis']
279: },
280: mirror => {
281: default => 'on',
282: test => $onoff_test,
283: description => 'mirror ticks on opposite axis?',
284: edit_type => 'onoff'
285: },
286: start => {
287: default => '-10.0',
288: test => $real_test,
289: description => 'Start ticks at',
290: edit_type => 'entry',
291: size => '10'
292: },
293: increment => {
294: default => '1.0',
295: test => $real_test,
296: description => 'Place a tick every',
297: edit_type => 'entry',
298: size => '10'
299: },
300: end => {
301: default => ' 10.0',
302: test => $real_test,
303: description => 'Stop ticks at ',
304: edit_type => 'entry',
305: size => '10'
306: },
307: );
308:
309: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
310: my %axis_defaults =
311: (
312: color => {
313: default => 'x000000',
314: test => $color_test,
315: description => 'color of axes (x000000)',
316: edit_type => 'entry',
317: size => '10'
318: },
319: xmin => {
320: default => '-10.0',
321: test => $real_test,
322: description => 'minimum x-value shown in plot',
323: edit_type => 'entry',
324: size => '10'
325: },
326: xmax => {
327: default => ' 10.0',
328: test => $real_test,
329: description => 'maximum x-value shown in plot',
330: edit_type => 'entry',
331: size => '10'
332: },
333: ymin => {
334: default => '-10.0',
335: test => $real_test,
336: description => 'minimum y-value shown in plot',
337: edit_type => 'entry',
338: size => '10'
339: },
340: ymax => {
341: default => ' 10.0',
342: test => $real_test,
343: description => 'maximum y-value shown in plot',
344: edit_type => 'entry',
345: size => '10'
346: }
347: );
348:
349: my $curve_help_text = <<"ENDCURVEHELP";
350: The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
351: There are two ways of entering the information:
352: <dl>
353: <dt> Curve Data
354: <dd> Using a <b>data</b> tag you can specify the numbers used to produce
355: the plot.
356: <p>
357: By default, two <b>data</b> tags will be available in a plot. The
358: first will specify X coordinates of the data and the second will
359: give the Y coordinates of the data. When working with a linestyle that
360: requires more than two data sets, inserting another <b>data</b> tag is
361: required. Unfortunately, you must make sure the <b>data</b> tags appear
362: in the order gnuplot expects the data.
363: </p><p>
364: Specifying the data should usually be done with a perl variable or array,
365: such as \@Xdata and \@Ydata. You may also specify numerical data seperated
366: by commas. Again, the order of the <b>data</b> tags is important. The
367: first tag will be the X data and the second will be the Y data.
368: </p>
369: <dt> Curve Function
370: <dd> The <b>function</b> tag allows you to specify the curve to be
371: plotted as a formula that gnuplot can understand. <b>Be careful using this
372: tag.</b> It is surprisingly easy to give gnuplot a function it cannot deal
373: with properly. Be explicit: 2*sin(2*3.141592*x/4) will work but
374: 2sin(2*3.141592x/4) will not. If you do not receive any errors in the
375: gnuplot data but still do not have an image produced, it is likely there
376: is an error in your <b>function</b> tag.
377: </dl>
378: ENDCURVEHELP
379:
380: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
381:
382: my %curve_defaults =
383: (
384: color => {
385: default => 'x000000',
386: test => $color_test,
387: description => 'color of curve (x000000)',
388: edit_type => 'entry',
389: size => '10'
390: },
391: name => {
392: default => '',
393: test => $words_test,
394: description => 'name of curve to appear in key',
395: edit_type => 'entry',
396: size => '20'
397: },
398: linestyle => {
399: default => 'lines',
400: test => $linestyle_test,
401: description => 'Line style',
402: edit_type => 'choice',
403: choices => [keys(%linestyles)]
404: },
405: # gnuplots term=gif driver does not handle linewidth :(
406: # linewidth => {
407: # default => 1,
408: # test => $int_test,
409: # description => 'Line width (may not apply to all line styles)',
410: # edit_type => 'choice',
411: # choices => [1,2,3,4,5,6,7,8,9,10]
412: # },
413: pointsize => {
414: default => 1,
415: test => $pos_real_test,
416: description => 'point size (may not apply to all line styles)',
417: edit_type => 'entry',
418: size => '5'
419: },
420: pointtype => {
421: default => 1,
422: test => $int_test,
423: description => 'point type (may not apply to all line styles)',
424: edit_type => 'choice',
425: choices => [0,1,2,3,4,5,6]
426: }
427: );
428:
429: ###################################################################
430: ## ##
431: ## parsing and edit rendering ##
432: ## ##
433: ###################################################################
434: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
435:
436: sub start_gnuplot {
437: %plot = (); %key = (); %axis = ();
438: $title = undef; $xlabel = undef; $ylabel = undef;
439: $#labels = -1; $#curves = -1;
440: %xtics = (); %ytics = ();
441: #
442: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
443: my $result='';
444: &Apache::lonxml::register('Apache::lonplot',
445: ('title','xlabel','ylabel','key','axis','label','curve',
446: 'xtics','ytics'));
447: push (@Apache::lonxml::namespace,'lonplot');
448: if ($target eq 'web' || $target eq 'tex') {
449: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
450: $tagstack->[-1]);
451: } elsif ($target eq 'edit') {
452: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
453: $result .= &make_javascript();
454: $result .= &help_win($gnuplot_help_text);
455: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
456: \@gnuplot_edit_order);
457: } elsif ($target eq 'modified') {
458: my $constructtag=&Apache::edit::get_new_args
459: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
460: if ($constructtag) {
461: $result = &Apache::edit::rebuild_tag($token);
462: }
463: }
464: return $result;
465: }
466:
467: sub end_gnuplot {
468: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
469: pop @Apache::lonxml::namespace;
470: &Apache::lonxml::deregister('Apache::lonplot',
471: ('title','xlabel','ylabel','key','axis','label','curve'));
472: my $result = '';
473: my $randnumber;
474: # need to call rand everytime start_script would evaluate, as the
475: # safe space rand number generator and the global rand generator
476: # are not seperate
477: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
478: $target eq 'answer') {
479: $randnumber=int(rand(1000));
480: }
481: if ($target eq 'web' || $target eq 'tex') {
482: &check_inputs(); # Make sure we have all the data we need
483: ##
484: ## Determine filename
485: my $tmpdir = '/home/httpd/perl/tmp/';
486: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
487: '_'.time.'_'.$$.$randnumber.'_plot.data';
488: ## Write the plot description to the file
489: &write_gnuplot_file($tmpdir,$filename,$target);
490: $filename = &Apache::lonnet::escape($filename);
491: ## return image tag for the plot
492: if ($target eq 'web') {
493: $result .= <<"ENDIMAGE";
494: <img src = "/cgi-bin/plot.gif?file=$filename&output=gif"
495: width = "$plot{'width'}"
496: height = "$plot{'height'}"
497: align = "$plot{'align'}"
498: alt = "$plot{'alttag'}" />
499: ENDIMAGE
500: } elsif ($target eq 'tex') {
501: &Apache::lonnet::ssi('cgi-bin/plot.gif?file=$filename'.
502: '&output=eps');
503: $result = "$filename.eps";
504: }
505: } elsif ($target eq 'edit') {
506: $result.=&Apache::edit::tag_end($target,$token);
507: }
508: return $result;
509: }
510:
511:
512: ##--------------------------------------------------------------- xtics
513: sub start_xtics {
514: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
515: my $result='';
516: if ($target eq 'web' || $target eq 'tex') {
517: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
518: $tagstack->[-1]);
519: } elsif ($target eq 'edit') {
520: $result .= &Apache::edit::tag_start($target,$token,'xtics');
521: $result .= &edit_attributes($target,$token,\%tic_defaults,
522: \@tic_edit_order);
523: } elsif ($target eq 'modified') {
524: my $constructtag=&Apache::edit::get_new_args
525: ($token,$parstack,$safeeval,keys(%tic_defaults));
526: if ($constructtag) {
527: $result = &Apache::edit::rebuild_tag($token);
528: }
529: }
530: return $result;
531: }
532:
533: sub end_xtics {
534: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
535: my $result = '';
536: if ($target eq 'web' || $target eq 'tex') {
537: } elsif ($target eq 'edit') {
538: $result.=&Apache::edit::tag_end($target,$token);
539: }
540: return $result;
541: }
542:
543: ##--------------------------------------------------------------- ytics
544: sub start_ytics {
545: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
546: my $result='';
547: if ($target eq 'web' || $target eq 'tex') {
548: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
549: $tagstack->[-1]);
550: } elsif ($target eq 'edit') {
551: $result .= &Apache::edit::tag_start($target,$token,'ytics');
552: $result .= &edit_attributes($target,$token,\%tic_defaults,
553: \@tic_edit_order);
554: } elsif ($target eq 'modified') {
555: my $constructtag=&Apache::edit::get_new_args
556: ($token,$parstack,$safeeval,keys(%tic_defaults));
557: if ($constructtag) {
558: $result = &Apache::edit::rebuild_tag($token);
559: }
560: }
561: return $result;
562: }
563:
564: sub end_ytics {
565: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
566: my $result = '';
567: if ($target eq 'web' || $target eq 'tex') {
568: } elsif ($target eq 'edit') {
569: $result.=&Apache::edit::tag_end($target,$token);
570: }
571: return $result;
572: }
573:
574:
575: ##----------------------------------------------------------------- key
576: sub start_key {
577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
578: my $result='';
579: if ($target eq 'web' || $target eq 'tex') {
580: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
581: $tagstack->[-1]);
582: } elsif ($target eq 'edit') {
583: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
584: $result .= &edit_attributes($target,$token,\%key_defaults);
585: } elsif ($target eq 'modified') {
586: my $constructtag=&Apache::edit::get_new_args
587: ($token,$parstack,$safeeval,keys(%key_defaults));
588: if ($constructtag) {
589: $result = &Apache::edit::rebuild_tag($token);
590: }
591: }
592: return $result;
593: }
594:
595: sub end_key {
596: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
597: my $result = '';
598: if ($target eq 'web' || $target eq 'tex') {
599: } elsif ($target eq 'edit') {
600: $result.=&Apache::edit::tag_end($target,$token);
601: }
602: return $result;
603: }
604:
605: ##------------------------------------------------------------------- title
606: sub start_title {
607: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
608: my $result='';
609: if ($target eq 'web' || $target eq 'tex') {
610: $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
611: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
612: $title =~ s/\n/ /g;
613: if (length($title) > $max_str_len) {
614: $title = substr($title,0,$max_str_len);
615: }
616: } elsif ($target eq 'edit') {
617: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
618: my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]);
619: $result.=&Apache::edit::end_row().
620: &Apache::edit::start_spanning_row().
621: &Apache::edit::editline('',$text,'',60);
622: } elsif ($target eq 'modified') {
623: my $text=$$parser[-1]->get_text("/title");
624: $result.=&Apache::edit::rebuild_tag($token);
625: $result.=&Apache::edit::modifiedfield($token);
626: }
627: return $result;
628: }
629:
630: sub end_title {
631: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
632: my $result = '';
633: if ($target eq 'web' || $target eq 'tex') {
634: } elsif ($target eq 'edit') {
635: $result.=&Apache::edit::tag_end($target,$token);
636: }
637: return $result;
638: }
639: ##------------------------------------------------------------------- xlabel
640: sub start_xlabel {
641: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
642: my $result='';
643: if ($target eq 'web' || $target eq 'tex') {
644: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
645: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
646: $xlabel =~ s/\n/ /g;
647: if (length($xlabel) > $max_str_len) {
648: $xlabel = substr($xlabel,0,$max_str_len);
649: }
650: } elsif ($target eq 'edit') {
651: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
652: my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
653: $result.=&Apache::edit::end_row().
654: &Apache::edit::start_spanning_row().
655: &Apache::edit::editline('',$text,'',60);
656: } elsif ($target eq 'modified') {
657: my $text=$$parser[-1]->get_text("/xlabel");
658: $result.=&Apache::edit::rebuild_tag($token);
659: $result.=&Apache::edit::modifiedfield($token);
660: }
661: return $result;
662: }
663:
664: sub end_xlabel {
665: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
666: my $result = '';
667: if ($target eq 'web' || $target eq 'tex') {
668: } elsif ($target eq 'edit') {
669: $result.=&Apache::edit::tag_end($target,$token);
670: }
671: return $result;
672: }
673:
674: ##------------------------------------------------------------------- ylabel
675: sub start_ylabel {
676: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
677: my $result='';
678: if ($target eq 'web' || $target eq 'tex') {
679: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
680: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
681: $ylabel =~ s/\n/ /g;
682: if (length($ylabel) > $max_str_len) {
683: $ylabel = substr($ylabel,0,$max_str_len);
684: }
685: } elsif ($target eq 'edit') {
686: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
687: my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
688: $result .= &Apache::edit::end_row().
689: &Apache::edit::start_spanning_row().
690: &Apache::edit::editline('',$text,'',60);
691: } elsif ($target eq 'modified') {
692: my $text=$$parser[-1]->get_text("/ylabel");
693: $result.=&Apache::edit::rebuild_tag($token);
694: $result.=&Apache::edit::modifiedfield($token);
695: }
696: return $result;
697: }
698:
699: sub end_ylabel {
700: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
701: my $result = '';
702: if ($target eq 'web' || $target eq 'tex') {
703: } elsif ($target eq 'edit') {
704: $result.=&Apache::edit::tag_end($target,$token);
705: }
706: return $result;
707: }
708:
709: ##------------------------------------------------------------------- label
710: sub start_label {
711: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
712: my $result='';
713: if ($target eq 'web' || $target eq 'tex') {
714: my %label;
715: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
716: $tagstack->[-1]);
717: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
718: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
719: $text =~ s/\n/ /g;
720: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
721: $label{'text'} = $text;
722: push(@labels,\%label);
723: } elsif ($target eq 'edit') {
724: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
725: $result .= &edit_attributes($target,$token,\%label_defaults);
726: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
727: $result .= &Apache::edit::end_row().
728: &Apache::edit::start_spanning_row().
729: &Apache::edit::editline('',$text,'',60);
730: } elsif ($target eq 'modified') {
731: &Apache::edit::get_new_args
732: ($token,$parstack,$safeeval,keys(%label_defaults));
733: $result.=&Apache::edit::rebuild_tag($token);
734: my $text=$$parser[-1]->get_text("/label");
735: $result.=&Apache::edit::modifiedfield($token);
736: }
737: return $result;
738: }
739:
740: sub end_label {
741: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
742: my $result = '';
743: if ($target eq 'web' || $target eq 'tex') {
744: } elsif ($target eq 'edit') {
745: $result.=&Apache::edit::tag_end($target,$token);
746: }
747: return $result;
748: }
749:
750: ##------------------------------------------------------------------- curve
751: sub start_curve {
752: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
753: my $result='';
754: &Apache::lonxml::register('Apache::lonplot',('function','data'));
755: push (@Apache::lonxml::namespace,'curve');
756: if ($target eq 'web' || $target eq 'tex') {
757: my %curve;
758: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
759: $tagstack->[-1]);
760: push (@curves,\%curve);
761: } elsif ($target eq 'edit') {
762: $result .= &Apache::edit::tag_start($target,$token,'Curve');
763: $result .= &help_win($curve_help_text);
764: $result .= &edit_attributes($target,$token,\%curve_defaults,
765: \@curve_edit_order);
766: } elsif ($target eq 'modified') {
767: my $constructtag=&Apache::edit::get_new_args
768: ($token,$parstack,$safeeval,keys(%curve_defaults));
769: if ($constructtag) {
770: $result = &Apache::edit::rebuild_tag($token);
771: $result.= &Apache::edit::handle_insert();
772: }
773: }
774: return $result;
775: }
776:
777: sub end_curve {
778: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
779: my $result = '';
780: pop @Apache::lonxml::namespace;
781: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
782: if ($target eq 'web' || $target eq 'tex') {
783: } elsif ($target eq 'edit') {
784: $result.=&Apache::edit::tag_end($target,$token);
785: }
786: return $result;
787: }
788:
789: ##------------------------------------------------------------ curve function
790: sub start_function {
791: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
792: my $result='';
793: if ($target eq 'web' || $target eq 'tex') {
794: if (exists($curves[-1]->{'data'})) {
795: &Apache::lonxml::warning('Use of <function> precludes use of <data>. The <data> will be omitted in favor of the <function> declaration.');
796: delete $curves[-1]->{'data'} ;
797: }
798: my $function = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
799: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
800: $curves[-1]->{'function'} = $function;
801: } elsif ($target eq 'edit') {
802: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
803: my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
804: $result .= &Apache::edit::end_row().
805: &Apache::edit::start_spanning_row().
806: &Apache::edit::editline('',$text,'',60);
807: } elsif ($target eq 'modified') {
808: $result.=&Apache::edit::rebuild_tag($token);
809: my $text=$$parser[-1]->get_text("/function");
810: $result.=&Apache::edit::modifiedfield($token);
811: }
812: return $result;
813: }
814:
815: sub end_function {
816: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
817: my $result = '';
818: if ($target eq 'web' || $target eq 'tex') {
819: } elsif ($target eq 'edit') {
820: $result .= &Apache::edit::end_table();
821: }
822: return $result;
823: }
824:
825: ##------------------------------------------------------------ curve data
826: sub start_data {
827: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
828: my $result='';
829: if ($target eq 'web' || $target eq 'tex') {
830: if (exists($curves[-1]->{'function'})) {
831: &Apache::lonxml::warning('Use of <data> precludes use of .'.
832: '<function>. The <function> will be omitted in favor of '.
833: 'the <data> declaration.');
834: delete($curves[-1]->{'function'});
835: }
836: my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
837: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
838: # Deal with cases where we're given an array...
839: if ($datatext =~ /^\@/) {
840: $datatext = &Apache::run::run('return "'.$datatext.'"',
841: $safeeval,1);
842: }
843: $datatext =~ s/\s+/ /g;
844: # Need to do some error checking on the @data array -
845: # make sure it's all numbers and make sure each array
846: # is of the same length.
847: my @data;
848: if ($datatext =~ /,/) { # comma deliminated
849: @data = split /,/,$datatext;
850: } else { # Assume it's space seperated.
851: @data = split / /,$datatext;
852: }
853: for (my $i=0;$i<=$#data;$i++) {
854: # Check that it's non-empty
855: if (! defined($data[$i])) {
856: &Apache::lonxml::warning(
857: 'undefined <data> value. Replacing with '.
858: ' pi/e = 1.15572734979092');
859: $data[$i] = 1.15572734979092;
860: }
861: # Check that it's a number
862: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
863: &Apache::lonxml::warning(
864: 'Bad <data> value of '.$data[$i].' Replacing with '.
865: ' pi/e = 1.15572734979092');
866: $data[$i] = 1.15572734979092;
867: }
868: }
869: # complain if the number of data points is not the same as
870: # in previous sets of data.
871: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
872: &Apache::lonxml::warning
873: ('Number of data points is not consistent with previous '.
874: 'number of data points');
875: }
876: push @{$curves[-1]->{'data'}},\@data;
877: } elsif ($target eq 'edit') {
878: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
879: my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
880: $result .= &Apache::edit::end_row().
881: &Apache::edit::start_spanning_row().
882: &Apache::edit::editline('',$text,'',60);
883: } elsif ($target eq 'modified') {
884: $result.=&Apache::edit::rebuild_tag($token);
885: my $text=$$parser[-1]->get_text("/data");
886: $result.=&Apache::edit::modifiedfield($token);
887: }
888: return $result;
889: }
890:
891: sub end_data {
892: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
893: my $result = '';
894: if ($target eq 'web' || $target eq 'tex') {
895: } elsif ($target eq 'edit') {
896: $result .= &Apache::edit::end_table();
897: }
898: return $result;
899: }
900:
901: ##------------------------------------------------------------------- axis
902: sub start_axis {
903: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
904: my $result='';
905: if ($target eq 'web' || $target eq 'tex') {
906: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
907: $tagstack->[-1]);
908: } elsif ($target eq 'edit') {
909: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
910: $result .= &edit_attributes($target,$token,\%axis_defaults,
911: \@axis_edit_order);
912: } elsif ($target eq 'modified') {
913: my $constructtag=&Apache::edit::get_new_args
914: ($token,$parstack,$safeeval,keys(%axis_defaults));
915: if ($constructtag) {
916: $result = &Apache::edit::rebuild_tag($token);
917: }
918: }
919: return $result;
920: }
921:
922: sub end_axis {
923: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
924: my $result = '';
925: if ($target eq 'web' || $target eq 'tex') {
926: } elsif ($target eq 'edit') {
927: $result.=&Apache::edit::tag_end($target,$token);
928: } elsif ($target eq 'modified') {
929: }
930: return $result;
931: }
932:
933: ###################################################################
934: ## ##
935: ## Utility Functions ##
936: ## ##
937: ###################################################################
938:
939: ##----------------------------------------------------------- set_defaults
940: sub set_defaults {
941: my ($var,$defaults) = @_;
942: my $key;
943: foreach $key (keys(%$defaults)) {
944: $var->{$key} = $defaults->{$key}->{'default'};
945: }
946: }
947:
948: ##------------------------------------------------------------------- misc
949: sub get_attributes{
950: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
951: foreach my $attr (keys(%{$defaults})) {
952: $values->{$attr} =
953: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
954: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
955: $values->{$attr} = $defaults->{$attr}->{'default'};
956: next;
957: }
958: my $test = $defaults->{$attr}->{'test'};
959: if (! &$test($values->{$attr})) {
960: &Apache::lonxml::warning
961: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
962: .$defaults->{$attr}->{'default'} );
963: $values->{$attr} = $defaults->{$attr}->{'default'};
964: }
965: }
966: return ;
967: }
968:
969: ##------------------------------------------------------- write_gnuplot_file
970: sub write_gnuplot_file {
971: my ($tmpdir,$filename,$target)= @_;
972: my $gnuplot_input = '';
973: my $curve;
974: # Collect all the colors
975: my @Colors;
976: push @Colors, $plot{'bgcolor'};
977: push @Colors, $plot{'fgcolor'};
978: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
979: foreach $curve (@curves) {
980: push @Colors, ($curve->{'color'} ne '' ?
981: $curve->{'color'} :
982: $plot{'fgcolor'} );
983: }
984: # set term
985: if ($target eq 'web') {
986: $gnuplot_input .= 'set term gif ';
987: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
988: $gnuplot_input .= $plot{'font'} . ' ';
989: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
990: $gnuplot_input .= "@Colors\n";
991: # set output
992: $gnuplot_input .= "set output\n";
993: } elsif ($target eq 'tex') {
994: $gnuplot_input .= "set term postscript eps monochrome\n";
995: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/$filename.eps\"\n";
996: }
997: # grid
998: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
999: # border
1000: $gnuplot_input .= ($plot{'border'} eq 'on'?
1001: 'set border'.$/ :
1002: 'set noborder'.$/ ); # title, xlabel, ylabel
1003: # titles
1004: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
1005: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
1006: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
1007: # tics
1008: if (%xtics) {
1009: $gnuplot_input .= "set xtics $xtics{'location'} ";
1010: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1011: $gnuplot_input .= "$xtics{'start'}, ";
1012: $gnuplot_input .= "$xtics{'increment'}, ";
1013: $gnuplot_input .= "$xtics{'end'}\n";
1014: }
1015: if (%ytics) {
1016: $gnuplot_input .= "set ytics $ytics{'location'} ";
1017: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1018: $gnuplot_input .= "$ytics{'start'}, ";
1019: $gnuplot_input .= "$ytics{'increment'}, ";
1020: $gnuplot_input .= "$ytics{'end'}\n";
1021: }
1022: # axis
1023: if (%axis) {
1024: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1025: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1026: }
1027: # Key
1028: if (%key) {
1029: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1030: if ($key{'title'} ne '') {
1031: $gnuplot_input .= 'title " '.$key{'title'}.'" ';
1032: }
1033: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1034: } else {
1035: $gnuplot_input .= 'set nokey'.$/;
1036: }
1037: # labels
1038: my $label;
1039: foreach $label (@labels) {
1040: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1041: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
1042: }
1043: # curves
1044: $gnuplot_input .= 'plot ';
1045: for (my $i = 0;$i<=$#curves;$i++) {
1046: $curve = $curves[$i];
1047: $gnuplot_input.= ', ' if ($i > 0);
1048: if (exists($curve->{'function'})) {
1049: $gnuplot_input.=
1050: $curve->{'function'}.' title "'.
1051: $curve->{'name'}.'" with '.
1052: $curve->{'linestyle'};
1053: #
1054: # gnuplot's term=gif driver does not handle linewidths :(
1055: # . ' linewidth '. $curve->{'linewidth'};
1056: #
1057: if (($curve->{'linestyle'} eq 'points') ||
1058: ($curve->{'linestyle'} eq 'linespoints') ||
1059: ($curve->{'linestyle'} eq 'errorbars') ||
1060: ($curve->{'linestyle'} eq 'xerrorbars') ||
1061: ($curve->{'linestyle'} eq 'yerrorbars') ||
1062: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1063: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1064: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1065: }
1066: } elsif (exists($curve->{'data'})) {
1067: # Store data values in $datatext
1068: my $datatext = '';
1069: # get new filename
1070: my $datafilename = "$tmpdir/$filename.$i";
1071: my $fh=Apache::File->new(">$datafilename");
1072: # Compile data
1073: my @Data = @{$curve->{'data'}};
1074: my @Data0 = @{$Data[0]};
1075: for (my $i =0; $i<=$#Data0; $i++) {
1076: my $dataset;
1077: foreach $dataset (@Data) {
1078: $datatext .= $dataset->[$i] . ' ';
1079: }
1080: $datatext .= $/;
1081: }
1082: # write file
1083: print $fh $datatext;
1084: close ($fh);
1085: # generate gnuplot text
1086: $gnuplot_input.= '"'.$datafilename.'" title "'.
1087: $curve->{'name'}.'" with '.
1088: $curve->{'linestyle'};
1089: if (($curve->{'linestyle'} eq 'points') ||
1090: ($curve->{'linestyle'} eq 'linespoints') ||
1091: ($curve->{'linestyle'} eq 'errorbars') ||
1092: ($curve->{'linestyle'} eq 'xerrorbars') ||
1093: ($curve->{'linestyle'} eq 'yerrorbars') ||
1094: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1095: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1096: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1097: }
1098: }
1099: }
1100: # Write the output to a file.
1101: my $fh=Apache::File->new(">$tmpdir$filename");
1102: print $fh $gnuplot_input;
1103: close($fh);
1104: # That's all folks.
1105: return ;
1106: }
1107:
1108: #---------------------------------------------- check_inputs
1109: sub check_inputs {
1110: ## Note: no inputs, no outputs - this acts only on global variables.
1111: ## Make sure we have all the input we need:
1112: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1113: if (! %key ) {} # No key for this plot, thats okay
1114: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1115: if (! defined($title )) {} # No title for this plot, thats okay
1116: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1117: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1118: if ($#labels < 0) { } # No labels for this plot, thats okay
1119: if ($#curves < 0) {
1120: &Apache::lonxml::warning("No curves specified for plot!!!!");
1121: return '';
1122: }
1123: my $curve;
1124: foreach $curve (@curves) {
1125: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1126: &Apache::lonxml::warning("One of the curves specified did not contain any <data> or <function> declarations\n");
1127: return '';
1128: }
1129: }
1130: }
1131:
1132: #------------------------------------------------ make_edit
1133: sub edit_attributes {
1134: my ($target,$token,$defaults,$keys) = @_;
1135: my ($result,@keys);
1136: if ($keys && ref($keys) eq 'ARRAY') {
1137: @keys = @$keys;
1138: } else {
1139: @keys = sort(keys(%$defaults));
1140: }
1141: foreach my $attr (@keys) {
1142: # append a ' ' to the description if it doesn't have one already.
1143: my $description = $defaults->{$attr}->{'description'};
1144: $description .= ' ' if ($description !~ / $/);
1145: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1146: $result .= &Apache::edit::text_arg
1147: ($description,$attr,$token,
1148: $defaults->{$attr}->{'size'});
1149: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1150: $result .= &Apache::edit::select_arg
1151: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1152: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1153: $result .= &Apache::edit::select_arg
1154: ($description,$attr,['on','off'],$token);
1155: }
1156: $result .= '<br />';
1157: }
1158: return $result;
1159: }
1160:
1161:
1162: ###################################################################
1163: ## ##
1164: ## Insertion functions for editing plots ##
1165: ## ##
1166: ###################################################################
1167:
1168: sub insert_gnuplot {
1169: my $result = '';
1170: # plot attributes
1171: $result .= "\n<gnuplot ";
1172: foreach my $attr (keys(%gnuplot_defaults)) {
1173: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1174: }
1175: $result .= ">";
1176: # Add the components (most are commented out for simplicity)
1177: # $result .= &insert_key();
1178: # $result .= &insert_axis();
1179: # $result .= &insert_title();
1180: # $result .= &insert_xlabel();
1181: # $result .= &insert_ylabel();
1182: $result .= &insert_curve();
1183: # close up the <gnuplot>
1184: $result .= "\n</gnuplot>";
1185: return $result;
1186: }
1187:
1188: sub insert_tics {
1189: my $result;
1190: $result .= &insert_xtics() . &insert_ytics;
1191: return $result;
1192: }
1193:
1194: sub insert_xtics {
1195: my $result;
1196: $result .= "\n <xtics ";
1197: foreach my $attr (keys(%tic_defaults)) {
1198: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1199: }
1200: $result .= "/>";
1201: return $result;
1202: }
1203:
1204: sub insert_ytics {
1205: my $result;
1206: $result .= "\n <ytics ";
1207: foreach my $attr (keys(%tic_defaults)) {
1208: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1209: }
1210: $result .= "/>";
1211: return $result;
1212: }
1213:
1214: sub insert_key {
1215: my $result;
1216: $result .= "\n <key ";
1217: foreach my $attr (keys(%key_defaults)) {
1218: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1219: }
1220: $result .= " />";
1221: return $result;
1222: }
1223:
1224: sub insert_axis{
1225: my $result;
1226: $result .= "\n <axis ";
1227: foreach my $attr (keys(%axis_defaults)) {
1228: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1229: }
1230: $result .= " />";
1231: return $result;
1232: }
1233:
1234: sub insert_title { return "\n <title></title>"; }
1235: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1236: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1237:
1238: sub insert_label {
1239: my $result;
1240: $result .= "\n <label ";
1241: foreach my $attr (keys(%label_defaults)) {
1242: $result .= "\n $attr=\"".
1243: $label_defaults{$attr}->{'default'}."\"";
1244: }
1245: $result .= "></label>";
1246: return $result;
1247: }
1248:
1249: sub insert_curve {
1250: my $result;
1251: $result .= "\n <curve ";
1252: foreach my $attr (keys(%curve_defaults)) {
1253: $result .= "\n $attr=\"".
1254: $curve_defaults{$attr}->{'default'}."\"";
1255: }
1256: $result .= " >";
1257: $result .= &insert_data().&insert_data()."\n </curve>";
1258: }
1259:
1260: sub insert_function {
1261: my $result;
1262: $result .= "\n <function></function>";
1263: return $result;
1264: }
1265:
1266: sub insert_data {
1267: my $result;
1268: $result .= "\n <data></data>";
1269: return $result;
1270: }
1271:
1272: ##----------------------------------------------------------------------
1273: # Javascript functions to display help for tags
1274:
1275: sub make_javascript {
1276: my $helpwindowwidth = 400;
1277: my $helpwindowheight = 400;
1278: my $result = '';
1279: $result.=<<"ENDFUNCTION";
1280: <script language="JavaScript">
1281: function openWin(text)
1282: {
1283: newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
1284: newWin.document.open("text/html", "replace");
1285: newWin.document.writeln(text);
1286: newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
1287: newWin.document.close();
1288: }
1289: </script>
1290: ENDFUNCTION
1291: return $result;
1292: }
1293:
1294: sub help_win {
1295: my ($helptext)=@_;
1296: $helptext =~ s/\n/ /g;
1297: $helptext =~ s/\'/\\\'/g;
1298: my $result = '';
1299: $result.=<<"ENDWIN";
1300: <table width="100%"><tr><td align="right">
1301: <a href="javascript:openWin('$helptext')">help</a>
1302: </td></tr></table><hr />
1303: ENDWIN
1304: return $result;
1305: }
1306: ##----------------------------------------------------------------------
1307: 1;
1308: __END__
1309:
1310:
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