1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.82 2003/04/22 19:47:47 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: $result = '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics{'.&Apache::lonnet::unescape($filename).'.eps}';
518: }
519: } elsif ($target eq 'edit') {
520: $result.=&Apache::edit::tag_end($target,$token);
521: }
522: return $result;
523: }
524:
525:
526: ##--------------------------------------------------------------- xtics
527: sub start_xtics {
528: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
529: my $result='';
530: if ($target eq 'web' || $target eq 'tex') {
531: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
532: $tagstack->[-1]);
533: } elsif ($target eq 'edit') {
534: $result .= &Apache::edit::tag_start($target,$token,'xtics');
535: $result .= &edit_attributes($target,$token,\%tic_defaults,
536: \@tic_edit_order);
537: } elsif ($target eq 'modified') {
538: my $constructtag=&Apache::edit::get_new_args
539: ($token,$parstack,$safeeval,keys(%tic_defaults));
540: if ($constructtag) {
541: $result = &Apache::edit::rebuild_tag($token);
542: }
543: }
544: return $result;
545: }
546:
547: sub end_xtics {
548: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
549: my $result = '';
550: if ($target eq 'web' || $target eq 'tex') {
551: } elsif ($target eq 'edit') {
552: $result.=&Apache::edit::tag_end($target,$token);
553: }
554: return $result;
555: }
556:
557: ##--------------------------------------------------------------- ytics
558: sub start_ytics {
559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
560: my $result='';
561: if ($target eq 'web' || $target eq 'tex') {
562: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
563: $tagstack->[-1]);
564: } elsif ($target eq 'edit') {
565: $result .= &Apache::edit::tag_start($target,$token,'ytics');
566: $result .= &edit_attributes($target,$token,\%tic_defaults,
567: \@tic_edit_order);
568: } elsif ($target eq 'modified') {
569: my $constructtag=&Apache::edit::get_new_args
570: ($token,$parstack,$safeeval,keys(%tic_defaults));
571: if ($constructtag) {
572: $result = &Apache::edit::rebuild_tag($token);
573: }
574: }
575: return $result;
576: }
577:
578: sub end_ytics {
579: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
580: my $result = '';
581: if ($target eq 'web' || $target eq 'tex') {
582: } elsif ($target eq 'edit') {
583: $result.=&Apache::edit::tag_end($target,$token);
584: }
585: return $result;
586: }
587:
588:
589: ##----------------------------------------------------------------- key
590: sub start_key {
591: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
592: my $result='';
593: if ($target eq 'web' || $target eq 'tex') {
594: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
595: $tagstack->[-1]);
596: } elsif ($target eq 'edit') {
597: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
598: $result .= &edit_attributes($target,$token,\%key_defaults);
599: } elsif ($target eq 'modified') {
600: my $constructtag=&Apache::edit::get_new_args
601: ($token,$parstack,$safeeval,keys(%key_defaults));
602: if ($constructtag) {
603: $result = &Apache::edit::rebuild_tag($token);
604: }
605: }
606: return $result;
607: }
608:
609: sub end_key {
610: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
611: my $result = '';
612: if ($target eq 'web' || $target eq 'tex') {
613: } elsif ($target eq 'edit') {
614: $result.=&Apache::edit::tag_end($target,$token);
615: }
616: return $result;
617: }
618:
619: ##------------------------------------------------------------------- title
620: sub start_title {
621: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
622: my $result='';
623: if ($target eq 'web' || $target eq 'tex') {
624: $title = &Apache::lonxml::get_all_text("/title",$parser);
625: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
626: $title =~ s/\n/ /g;
627: if (length($title) > $max_str_len) {
628: $title = substr($title,0,$max_str_len);
629: }
630: } elsif ($target eq 'edit') {
631: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
632: my $text=&Apache::lonxml::get_all_text("/title",$parser);
633: $result.=&Apache::edit::end_row().
634: &Apache::edit::start_spanning_row().
635: &Apache::edit::editline('',$text,'',60);
636: } elsif ($target eq 'modified') {
637: my $text=$$parser[-1]->get_text("/title");
638: $result.=&Apache::edit::rebuild_tag($token);
639: $result.=&Apache::edit::modifiedfield($token);
640: }
641: return $result;
642: }
643:
644: sub end_title {
645: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
646: my $result = '';
647: if ($target eq 'web' || $target eq 'tex') {
648: } elsif ($target eq 'edit') {
649: $result.=&Apache::edit::tag_end($target,$token);
650: }
651: return $result;
652: }
653: ##------------------------------------------------------------------- xlabel
654: sub start_xlabel {
655: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
656: my $result='';
657: if ($target eq 'web' || $target eq 'tex') {
658: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
659: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
660: $xlabel =~ s/\n/ /g;
661: if (length($xlabel) > $max_str_len) {
662: $xlabel = substr($xlabel,0,$max_str_len);
663: }
664: } elsif ($target eq 'edit') {
665: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
666: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
667: $result.=&Apache::edit::end_row().
668: &Apache::edit::start_spanning_row().
669: &Apache::edit::editline('',$text,'',60);
670: } elsif ($target eq 'modified') {
671: my $text=$$parser[-1]->get_text("/xlabel");
672: $result.=&Apache::edit::rebuild_tag($token);
673: $result.=&Apache::edit::modifiedfield($token);
674: }
675: return $result;
676: }
677:
678: sub end_xlabel {
679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
680: my $result = '';
681: if ($target eq 'web' || $target eq 'tex') {
682: } elsif ($target eq 'edit') {
683: $result.=&Apache::edit::tag_end($target,$token);
684: }
685: return $result;
686: }
687:
688: ##------------------------------------------------------------------- ylabel
689: sub start_ylabel {
690: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
691: my $result='';
692: if ($target eq 'web' || $target eq 'tex') {
693: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
694: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
695: $ylabel =~ s/\n/ /g;
696: if (length($ylabel) > $max_str_len) {
697: $ylabel = substr($ylabel,0,$max_str_len);
698: }
699: } elsif ($target eq 'edit') {
700: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
701: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
702: $result .= &Apache::edit::end_row().
703: &Apache::edit::start_spanning_row().
704: &Apache::edit::editline('',$text,'',60);
705: } elsif ($target eq 'modified') {
706: my $text=$$parser[-1]->get_text("/ylabel");
707: $result.=&Apache::edit::rebuild_tag($token);
708: $result.=&Apache::edit::modifiedfield($token);
709: }
710: return $result;
711: }
712:
713: sub end_ylabel {
714: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
715: my $result = '';
716: if ($target eq 'web' || $target eq 'tex') {
717: } elsif ($target eq 'edit') {
718: $result.=&Apache::edit::tag_end($target,$token);
719: }
720: return $result;
721: }
722:
723: ##------------------------------------------------------------------- label
724: sub start_label {
725: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
726: my $result='';
727: if ($target eq 'web' || $target eq 'tex') {
728: my %label;
729: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
730: $tagstack->[-1]);
731: my $text = &Apache::lonxml::get_all_text("/label",$parser);
732: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
733: $text =~ s/\n/ /g;
734: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
735: $label{'text'} = $text;
736: push(@labels,\%label);
737: } elsif ($target eq 'edit') {
738: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
739: $result .= &edit_attributes($target,$token,\%label_defaults);
740: my $text = &Apache::lonxml::get_all_text("/label",$parser);
741: $result .= &Apache::edit::end_row().
742: &Apache::edit::start_spanning_row().
743: &Apache::edit::editline('',$text,'',60);
744: } elsif ($target eq 'modified') {
745: &Apache::edit::get_new_args
746: ($token,$parstack,$safeeval,keys(%label_defaults));
747: $result.=&Apache::edit::rebuild_tag($token);
748: my $text=$$parser[-1]->get_text("/label");
749: $result.=&Apache::edit::modifiedfield($token);
750: }
751: return $result;
752: }
753:
754: sub end_label {
755: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
756: my $result = '';
757: if ($target eq 'web' || $target eq 'tex') {
758: } elsif ($target eq 'edit') {
759: $result.=&Apache::edit::tag_end($target,$token);
760: }
761: return $result;
762: }
763:
764: ##------------------------------------------------------------------- curve
765: sub start_curve {
766: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
767: my $result='';
768: &Apache::lonxml::register('Apache::lonplot',('function','data'));
769: push (@Apache::lonxml::namespace,'curve');
770: if ($target eq 'web' || $target eq 'tex') {
771: my %curve;
772: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
773: $tagstack->[-1]);
774: push (@curves,\%curve);
775: } elsif ($target eq 'edit') {
776: $result .= &Apache::edit::tag_start($target,$token,'Curve');
777: $result .= &help_win($curve_help_text);
778: $result .= &edit_attributes($target,$token,\%curve_defaults,
779: \@curve_edit_order);
780: } elsif ($target eq 'modified') {
781: my $constructtag=&Apache::edit::get_new_args
782: ($token,$parstack,$safeeval,keys(%curve_defaults));
783: if ($constructtag) {
784: $result = &Apache::edit::rebuild_tag($token);
785: $result.= &Apache::edit::handle_insert();
786: }
787: }
788: return $result;
789: }
790:
791: sub end_curve {
792: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
793: my $result = '';
794: pop @Apache::lonxml::namespace;
795: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
796: if ($target eq 'web' || $target eq 'tex') {
797: } elsif ($target eq 'edit') {
798: $result.=&Apache::edit::tag_end($target,$token);
799: }
800: return $result;
801: }
802:
803: ##------------------------------------------------------------ curve function
804: sub start_function {
805: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
806: my $result='';
807: if ($target eq 'web' || $target eq 'tex') {
808: if (exists($curves[-1]->{'data'})) {
809: &Apache::lonxml::warning('Use of <function> precludes use of <data>. The <data> will be omitted in favor of the <function> declaration.');
810: delete $curves[-1]->{'data'} ;
811: }
812: my $function = &Apache::lonxml::get_all_text("/function",$parser);
813: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
814: $curves[-1]->{'function'} = $function;
815: } elsif ($target eq 'edit') {
816: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
817: my $text = &Apache::lonxml::get_all_text("/function",$parser);
818: $result .= &Apache::edit::end_row().
819: &Apache::edit::start_spanning_row().
820: &Apache::edit::editline('',$text,'',60);
821: } elsif ($target eq 'modified') {
822: $result.=&Apache::edit::rebuild_tag($token);
823: my $text=$$parser[-1]->get_text("/function");
824: $result.=&Apache::edit::modifiedfield($token);
825: }
826: return $result;
827: }
828:
829: sub end_function {
830: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
831: my $result = '';
832: if ($target eq 'web' || $target eq 'tex') {
833: } elsif ($target eq 'edit') {
834: $result .= &Apache::edit::end_table();
835: }
836: return $result;
837: }
838:
839: ##------------------------------------------------------------ curve data
840: sub start_data {
841: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
842: my $result='';
843: if ($target eq 'web' || $target eq 'tex') {
844: if (exists($curves[-1]->{'function'})) {
845: &Apache::lonxml::warning('Use of <data> precludes use of .'.
846: '<function>. The <function> will be omitted in favor of '.
847: 'the <data> declaration.');
848: delete($curves[-1]->{'function'});
849: }
850: my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
851: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
852: # Deal with cases where we're given an array...
853: if ($datatext =~ /^\@/) {
854: $datatext = &Apache::run::run('return "'.$datatext.'"',
855: $safeeval,1);
856: }
857: $datatext =~ s/\s+/ /g;
858: # Need to do some error checking on the @data array -
859: # make sure it's all numbers and make sure each array
860: # is of the same length.
861: my @data;
862: if ($datatext =~ /,/) { # comma deliminated
863: @data = split /,/,$datatext;
864: } else { # Assume it's space seperated.
865: @data = split / /,$datatext;
866: }
867: for (my $i=0;$i<=$#data;$i++) {
868: # Check that it's non-empty
869: if (! defined($data[$i])) {
870: &Apache::lonxml::warning(
871: 'undefined <data> value. Replacing with '.
872: ' pi/e = 1.15572734979092');
873: $data[$i] = 1.15572734979092;
874: }
875: # Check that it's a number
876: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
877: &Apache::lonxml::warning(
878: 'Bad <data> value of '.$data[$i].' Replacing with '.
879: ' pi/e = 1.15572734979092');
880: $data[$i] = 1.15572734979092;
881: }
882: }
883: # complain if the number of data points is not the same as
884: # in previous sets of data.
885: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
886: &Apache::lonxml::warning
887: ('Number of data points is not consistent with previous '.
888: 'number of data points');
889: }
890: push @{$curves[-1]->{'data'}},\@data;
891: } elsif ($target eq 'edit') {
892: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
893: my $text = &Apache::lonxml::get_all_text("/data",$parser);
894: $result .= &Apache::edit::end_row().
895: &Apache::edit::start_spanning_row().
896: &Apache::edit::editline('',$text,'',60);
897: } elsif ($target eq 'modified') {
898: $result.=&Apache::edit::rebuild_tag($token);
899: my $text=$$parser[-1]->get_text("/data");
900: $result.=&Apache::edit::modifiedfield($token);
901: }
902: return $result;
903: }
904:
905: sub end_data {
906: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
907: my $result = '';
908: if ($target eq 'web' || $target eq 'tex') {
909: } elsif ($target eq 'edit') {
910: $result .= &Apache::edit::end_table();
911: }
912: return $result;
913: }
914:
915: ##------------------------------------------------------------------- axis
916: sub start_axis {
917: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
918: my $result='';
919: if ($target eq 'web' || $target eq 'tex') {
920: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
921: $tagstack->[-1]);
922: } elsif ($target eq 'edit') {
923: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
924: $result .= &edit_attributes($target,$token,\%axis_defaults,
925: \@axis_edit_order);
926: } elsif ($target eq 'modified') {
927: my $constructtag=&Apache::edit::get_new_args
928: ($token,$parstack,$safeeval,keys(%axis_defaults));
929: if ($constructtag) {
930: $result = &Apache::edit::rebuild_tag($token);
931: }
932: }
933: return $result;
934: }
935:
936: sub end_axis {
937: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
938: my $result = '';
939: if ($target eq 'web' || $target eq 'tex') {
940: } elsif ($target eq 'edit') {
941: $result.=&Apache::edit::tag_end($target,$token);
942: } elsif ($target eq 'modified') {
943: }
944: return $result;
945: }
946:
947: ###################################################################
948: ## ##
949: ## Utility Functions ##
950: ## ##
951: ###################################################################
952:
953: ##----------------------------------------------------------- set_defaults
954: sub set_defaults {
955: my ($var,$defaults) = @_;
956: my $key;
957: foreach $key (keys(%$defaults)) {
958: $var->{$key} = $defaults->{$key}->{'default'};
959: }
960: }
961:
962: ##------------------------------------------------------------------- misc
963: sub get_attributes{
964: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
965: foreach my $attr (keys(%{$defaults})) {
966: $values->{$attr} =
967: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
968: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
969: $values->{$attr} = $defaults->{$attr}->{'default'};
970: next;
971: }
972: my $test = $defaults->{$attr}->{'test'};
973: if (! &$test($values->{$attr})) {
974: &Apache::lonxml::warning
975: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
976: .$defaults->{$attr}->{'default'} );
977: $values->{$attr} = $defaults->{$attr}->{'default'};
978: }
979: }
980: return ;
981: }
982:
983: ##------------------------------------------------------- write_gnuplot_file
984: sub write_gnuplot_file {
985: my ($tmpdir,$filename,$target)= @_;
986: my $gnuplot_input = '';
987: my $curve;
988: # Collect all the colors
989: my @Colors;
990: push @Colors, $plot{'bgcolor'};
991: push @Colors, $plot{'fgcolor'};
992: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
993: foreach $curve (@curves) {
994: push @Colors, ($curve->{'color'} ne '' ?
995: $curve->{'color'} :
996: $plot{'fgcolor'} );
997: }
998: # set term
999: if ($target eq 'web') {
1000: $gnuplot_input .= 'set term gif ';
1001: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
1002: $gnuplot_input .= $plot{'font'} . ' ';
1003: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1004: $gnuplot_input .= "@Colors\n";
1005: # set output
1006: $gnuplot_input .= "set output\n";
1007: } elsif ($target eq 'tex') {
1008: $gnuplot_input .= "set term postscript eps monochrome solid\n";
1009: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1010: &Apache::lonnet::unescape($filename).".eps\"\n";
1011: }
1012: # grid
1013: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1014: # border
1015: $gnuplot_input .= ($plot{'border'} eq 'on'?
1016: 'set border'.$/ :
1017: 'set noborder'.$/ );
1018: # sampling rate for non-data curves
1019: $gnuplot_input .= "set samples $plot{'samples'}\n";
1020: # title, xlabel, ylabel
1021: # titles
1022: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
1023: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
1024: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
1025: # tics
1026: if (%xtics) {
1027: $gnuplot_input .= "set xtics $xtics{'location'} ";
1028: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1029: $gnuplot_input .= "$xtics{'start'}, ";
1030: $gnuplot_input .= "$xtics{'increment'}, ";
1031: $gnuplot_input .= "$xtics{'end'}\n";
1032: }
1033: if (%ytics) {
1034: $gnuplot_input .= "set ytics $ytics{'location'} ";
1035: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1036: $gnuplot_input .= "$ytics{'start'}, ";
1037: $gnuplot_input .= "$ytics{'increment'}, ";
1038: $gnuplot_input .= "$ytics{'end'}\n";
1039: }
1040: # axis
1041: if (%axis) {
1042: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1043: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1044: }
1045: # Key
1046: if (%key) {
1047: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1048: if ($key{'title'} ne '') {
1049: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1050: }
1051: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1052: } else {
1053: $gnuplot_input .= 'set nokey'.$/;
1054: }
1055: # labels
1056: my $label;
1057: foreach $label (@labels) {
1058: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1059: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
1060: }
1061: if ($target eq 'tex') {
1062: $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
1063: $gnuplot_input .="\n";
1064: }
1065: # curves
1066: $gnuplot_input .= 'plot ';
1067: for (my $i = 0;$i<=$#curves;$i++) {
1068: $curve = $curves[$i];
1069: $gnuplot_input.= ', ' if ($i > 0);
1070: if (exists($curve->{'function'})) {
1071: $gnuplot_input.=
1072: $curve->{'function'}.' title "'.
1073: $curve->{'name'}.'" with '.
1074: $curve->{'linestyle'};
1075: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1076: if (($curve->{'linestyle'} eq 'points') ||
1077: ($curve->{'linestyle'} eq 'linespoints') ||
1078: ($curve->{'linestyle'} eq 'errorbars') ||
1079: ($curve->{'linestyle'} eq 'xerrorbars') ||
1080: ($curve->{'linestyle'} eq 'yerrorbars') ||
1081: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1082: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1083: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1084: }
1085: } elsif (exists($curve->{'data'})) {
1086: # Store data values in $datatext
1087: my $datatext = '';
1088: # get new filename
1089: my $datafilename = "$tmpdir/$filename.data.$i";
1090: my $fh=Apache::File->new(">$datafilename");
1091: # Compile data
1092: my @Data = @{$curve->{'data'}};
1093: my @Data0 = @{$Data[0]};
1094: for (my $i =0; $i<=$#Data0; $i++) {
1095: my $dataset;
1096: foreach $dataset (@Data) {
1097: $datatext .= $dataset->[$i] . ' ';
1098: }
1099: $datatext .= $/;
1100: }
1101: # write file
1102: print $fh $datatext;
1103: close ($fh);
1104: # generate gnuplot text
1105: $gnuplot_input.= '"'.$datafilename.'" title "'.
1106: $curve->{'name'}.'" with '.
1107: $curve->{'linestyle'};
1108: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1109: if (($curve->{'linestyle'} eq 'points') ||
1110: ($curve->{'linestyle'} eq 'linespoints') ||
1111: ($curve->{'linestyle'} eq 'errorbars') ||
1112: ($curve->{'linestyle'} eq 'xerrorbars') ||
1113: ($curve->{'linestyle'} eq 'yerrorbars') ||
1114: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1115: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1116: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1117: }
1118: }
1119: }
1120: # Write the output to a file.
1121: my $fh=Apache::File->new(">$tmpdir$filename.data");
1122: print $fh $gnuplot_input;
1123: close($fh);
1124: # That's all folks.
1125: return ;
1126: }
1127:
1128: #---------------------------------------------- check_inputs
1129: sub check_inputs {
1130: ## Note: no inputs, no outputs - this acts only on global variables.
1131: ## Make sure we have all the input we need:
1132: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1133: if (! %key ) {} # No key for this plot, thats okay
1134: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1135: if (! defined($title )) {} # No title for this plot, thats okay
1136: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1137: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1138: if ($#labels < 0) { } # No labels for this plot, thats okay
1139: if ($#curves < 0) {
1140: &Apache::lonxml::warning("No curves specified for plot!!!!");
1141: return '';
1142: }
1143: my $curve;
1144: foreach $curve (@curves) {
1145: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1146: &Apache::lonxml::warning("One of the curves specified did not contain any <data> or <function> declarations\n");
1147: return '';
1148: }
1149: }
1150: }
1151:
1152: #------------------------------------------------ make_edit
1153: sub edit_attributes {
1154: my ($target,$token,$defaults,$keys) = @_;
1155: my ($result,@keys);
1156: if ($keys && ref($keys) eq 'ARRAY') {
1157: @keys = @$keys;
1158: } else {
1159: @keys = sort(keys(%$defaults));
1160: }
1161: foreach my $attr (@keys) {
1162: # append a ' ' to the description if it doesn't have one already.
1163: my $description = $defaults->{$attr}->{'description'};
1164: $description .= ' ' if ($description !~ / $/);
1165: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1166: $result .= &Apache::edit::text_arg
1167: ($description,$attr,$token,
1168: $defaults->{$attr}->{'size'});
1169: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1170: $result .= &Apache::edit::select_arg
1171: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1172: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1173: $result .= &Apache::edit::select_arg
1174: ($description,$attr,['on','off'],$token);
1175: }
1176: $result .= '<br />';
1177: }
1178: return $result;
1179: }
1180:
1181:
1182: ###################################################################
1183: ## ##
1184: ## Insertion functions for editing plots ##
1185: ## ##
1186: ###################################################################
1187:
1188: sub insert_gnuplot {
1189: my $result = '';
1190: # plot attributes
1191: $result .= "\n<gnuplot ";
1192: foreach my $attr (keys(%gnuplot_defaults)) {
1193: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1194: }
1195: $result .= ">";
1196: # Add the components (most are commented out for simplicity)
1197: # $result .= &insert_key();
1198: # $result .= &insert_axis();
1199: # $result .= &insert_title();
1200: # $result .= &insert_xlabel();
1201: # $result .= &insert_ylabel();
1202: $result .= &insert_curve();
1203: # close up the <gnuplot>
1204: $result .= "\n</gnuplot>";
1205: return $result;
1206: }
1207:
1208: sub insert_tics {
1209: my $result;
1210: $result .= &insert_xtics() . &insert_ytics;
1211: return $result;
1212: }
1213:
1214: sub insert_xtics {
1215: my $result;
1216: $result .= "\n <xtics ";
1217: foreach my $attr (keys(%tic_defaults)) {
1218: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1219: }
1220: $result .= "/>";
1221: return $result;
1222: }
1223:
1224: sub insert_ytics {
1225: my $result;
1226: $result .= "\n <ytics ";
1227: foreach my $attr (keys(%tic_defaults)) {
1228: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1229: }
1230: $result .= "/>";
1231: return $result;
1232: }
1233:
1234: sub insert_key {
1235: my $result;
1236: $result .= "\n <key ";
1237: foreach my $attr (keys(%key_defaults)) {
1238: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1239: }
1240: $result .= " />";
1241: return $result;
1242: }
1243:
1244: sub insert_axis{
1245: my $result;
1246: $result .= "\n <axis ";
1247: foreach my $attr (keys(%axis_defaults)) {
1248: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1249: }
1250: $result .= " />";
1251: return $result;
1252: }
1253:
1254: sub insert_title { return "\n <title></title>"; }
1255: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1256: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1257:
1258: sub insert_label {
1259: my $result;
1260: $result .= "\n <label ";
1261: foreach my $attr (keys(%label_defaults)) {
1262: $result .= "\n $attr=\"".
1263: $label_defaults{$attr}->{'default'}."\"";
1264: }
1265: $result .= "></label>";
1266: return $result;
1267: }
1268:
1269: sub insert_curve {
1270: my $result;
1271: $result .= "\n <curve ";
1272: foreach my $attr (keys(%curve_defaults)) {
1273: $result .= "\n $attr=\"".
1274: $curve_defaults{$attr}->{'default'}."\"";
1275: }
1276: $result .= " >";
1277: $result .= &insert_data().&insert_data()."\n </curve>";
1278: }
1279:
1280: sub insert_function {
1281: my $result;
1282: $result .= "\n <function></function>";
1283: return $result;
1284: }
1285:
1286: sub insert_data {
1287: my $result;
1288: $result .= "\n <data></data>";
1289: return $result;
1290: }
1291:
1292: ##----------------------------------------------------------------------
1293: # Javascript functions to display help for tags
1294:
1295: sub make_javascript {
1296: my $helpwindowwidth = 400;
1297: my $helpwindowheight = 400;
1298: my $result = '';
1299: $result.=<<"ENDFUNCTION";
1300: <script language="JavaScript">
1301: function openWin(text)
1302: {
1303: newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
1304: newWin.document.open("text/html", "replace");
1305: newWin.document.writeln(text);
1306: newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
1307: newWin.document.close();
1308: }
1309: </script>
1310: ENDFUNCTION
1311: return $result;
1312: }
1313:
1314: sub help_win {
1315: my ($helptext)=@_;
1316: $helptext =~ s/\n/ /g;
1317: $helptext =~ s/\'/\\\'/g;
1318: my $result = '';
1319: $result.=<<"ENDWIN";
1320: <table width="100%"><tr><td align="right">
1321: <a href="javascript:openWin('$helptext')">help</a>
1322: </td></tr></table><hr />
1323: ENDWIN
1324: return $result;
1325: }
1326: ##----------------------------------------------------------------------
1327: 1;
1328: __END__
1329:
1330:
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