1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.87 2003/08/28 20:38:25 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 plottype/;
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 => $int_test,
229: description => 'Width of plot when printed (mm)',
230: edit_type => 'entry',
231: size => '5'
232: },
233: plottype => {
234: default => 'Cartesian',
235: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
236: description => 'Plot type:',
237: edit_type => 'choice',
238: choices => ['Polar','Cartesian']
239: },
240: );
241:
242: my %key_defaults =
243: (
244: title => {
245: default => '',
246: test => $words_test,
247: description => 'Title of key',
248: edit_type => 'entry',
249: size => '40'
250: },
251: box => {
252: default => 'off',
253: test => $onoff_test,
254: description => 'Draw a box around the key?',
255: edit_type => 'onoff'
256: },
257: pos => {
258: default => 'top right',
259: test => $key_pos_test,
260: description => 'position of the key on the plot',
261: edit_type => 'choice',
262: choices => ['top left','top right','bottom left','bottom right',
263: 'outside','below']
264: }
265: );
266:
267: my %label_defaults =
268: (
269: xpos => {
270: default => 0,
271: test => $real_test,
272: description => 'x position of label (graph coordinates)',
273: edit_type => 'entry',
274: size => '10'
275: },
276: ypos => {
277: default => 0,
278: test => $real_test,
279: description => 'y position of label (graph coordinates)',
280: edit_type => 'entry',
281: size => '10'
282: },
283: justify => {
284: default => 'left',
285: test => sub {$_[0]=~/^(left|right|center)$/},
286: description => 'justification of the label text on the plot',
287: edit_type => 'choice',
288: choices => ['left','right','center']
289: }
290: );
291:
292: my @tic_edit_order = ('location','mirror','start','increment','end');
293: my %tic_defaults =
294: (
295: location => {
296: default => 'border',
297: test => sub {$_[0]=~/^(border|axis)$/},
298: description => 'Location of tick marks',
299: edit_type => 'choice',
300: choices => ['border','axis']
301: },
302: mirror => {
303: default => 'on',
304: test => $onoff_test,
305: description => 'mirror ticks on opposite axis?',
306: edit_type => 'onoff'
307: },
308: start => {
309: default => '-10.0',
310: test => $real_test,
311: description => 'Start ticks at',
312: edit_type => 'entry',
313: size => '10'
314: },
315: increment => {
316: default => '1.0',
317: test => $real_test,
318: description => 'Place a tick every',
319: edit_type => 'entry',
320: size => '10'
321: },
322: end => {
323: default => ' 10.0',
324: test => $real_test,
325: description => 'Stop ticks at ',
326: edit_type => 'entry',
327: size => '10'
328: },
329: );
330:
331: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
332: my %axis_defaults =
333: (
334: color => {
335: default => 'x000000',
336: test => $color_test,
337: description => 'color of grid lines (x000000)',
338: edit_type => 'entry',
339: size => '10'
340: },
341: xmin => {
342: default => '-10.0',
343: test => $real_test,
344: description => 'minimum x-value shown in plot',
345: edit_type => 'entry',
346: size => '10'
347: },
348: xmax => {
349: default => ' 10.0',
350: test => $real_test,
351: description => 'maximum x-value shown in plot',
352: edit_type => 'entry',
353: size => '10'
354: },
355: ymin => {
356: default => '-10.0',
357: test => $real_test,
358: description => 'minimum y-value shown in plot',
359: edit_type => 'entry',
360: size => '10'
361: },
362: ymax => {
363: default => ' 10.0',
364: test => $real_test,
365: description => 'maximum y-value shown in plot',
366: edit_type => 'entry',
367: size => '10'
368: }
369: );
370:
371: my $curve_help_text = <<"ENDCURVEHELP";
372: The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
373: There are two ways of entering the information:
374: <dl>
375: <dt> Curve Data
376: <dd> Using a <b>data</b> tag you can specify the numbers used to produce
377: the plot.
378: <p>
379: By default, two <b>data</b> tags will be available in a plot. The
380: first will specify X coordinates of the data and the second will
381: give the Y coordinates of the data. When working with a linestyle that
382: requires more than two data sets, inserting another <b>data</b> tag is
383: required. Unfortunately, you must make sure the <b>data</b> tags appear
384: in the order gnuplot expects the data.
385: </p><p>
386: Specifying the data should usually be done with a perl variable or array,
387: such as \@Xdata and \@Ydata. You may also specify numerical data seperated
388: by commas. Again, the order of the <b>data</b> tags is important. The
389: first tag will be the X data and the second will be the Y data.
390: </p>
391: <dt> Curve Function
392: <dd> The <b>function</b> tag allows you to specify the curve to be
393: plotted as a formula that gnuplot can understand. <b>Be careful using this
394: tag.</b> It is surprisingly easy to give gnuplot a function it cannot deal
395: with properly. Be explicit: 2*sin(2*3.141592*x/4) will work but
396: 2sin(2*3.141592x/4) will not. If you do not receive any errors in the
397: gnuplot data but still do not have an image produced, it is likely there
398: is an error in your <b>function</b> tag.
399: </dl>
400: ENDCURVEHELP
401:
402: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
403:
404: my %curve_defaults =
405: (
406: color => {
407: default => 'x000000',
408: test => $color_test,
409: description => 'color of curve (x000000)',
410: edit_type => 'entry',
411: size => '10'
412: },
413: name => {
414: default => '',
415: test => $words_test,
416: description => 'name of curve to appear in key',
417: edit_type => 'entry',
418: size => '20'
419: },
420: linestyle => {
421: default => 'lines',
422: test => $linestyle_test,
423: description => 'Line style',
424: edit_type => 'choice',
425: choices => [keys(%linestyles)]
426: },
427: # gnuplots term=gif driver does not handle linewidth :(
428: # linewidth => {
429: # default => 1,
430: # test => $int_test,
431: # description => 'Line width (may not apply to all line styles)',
432: # edit_type => 'choice',
433: # choices => [1,2,3,4,5,6,7,8,9,10]
434: # },
435: pointsize => {
436: default => 1,
437: test => $pos_real_test,
438: description => 'point size (may not apply to all line styles)',
439: edit_type => 'entry',
440: size => '5'
441: },
442: pointtype => {
443: default => 1,
444: test => $int_test,
445: description => 'point type (may not apply to all line styles)',
446: edit_type => 'choice',
447: choices => [0,1,2,3,4,5,6]
448: }
449: );
450:
451: ###################################################################
452: ## ##
453: ## parsing and edit rendering ##
454: ## ##
455: ###################################################################
456: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
457:
458: sub start_gnuplot {
459: %plot = (); %key = (); %axis = ();
460: $title = undef; $xlabel = undef; $ylabel = undef;
461: $#labels = -1; $#curves = -1;
462: %xtics = (); %ytics = ();
463: #
464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
465: my $result='';
466: &Apache::lonxml::register('Apache::lonplot',
467: ('title','xlabel','ylabel','key','axis','label','curve',
468: 'xtics','ytics'));
469: push (@Apache::lonxml::namespace,'lonplot');
470: if ($target eq 'web' || $target eq 'tex') {
471: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
472: $tagstack->[-1]);
473: } elsif ($target eq 'edit') {
474: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
475: $result .= &make_javascript();
476: $result .= &help_win($gnuplot_help_text);
477: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
478: \@gnuplot_edit_order);
479: } elsif ($target eq 'modified') {
480: my $constructtag=&Apache::edit::get_new_args
481: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
482: if ($constructtag) {
483: $result = &Apache::edit::rebuild_tag($token);
484: }
485: }
486: return $result;
487: }
488:
489: sub end_gnuplot {
490: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
491: pop @Apache::lonxml::namespace;
492: &Apache::lonxml::deregister('Apache::lonplot',
493: ('title','xlabel','ylabel','key','axis','label','curve'));
494: my $result = '';
495: my $randnumber;
496: # need to call rand everytime start_script would evaluate, as the
497: # safe space rand number generator and the global rand generator
498: # are not seperate
499: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
500: $target eq 'answer') {
501: $randnumber=int(rand(1000));
502: }
503: if ($target eq 'web' || $target eq 'tex') {
504: &check_inputs(); # Make sure we have all the data we need
505: ##
506: ## Determine filename
507: my $tmpdir = '/home/httpd/perl/tmp/';
508: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
509: '_'.time.'_'.$$.$randnumber.'_plot';
510: ## Write the plot description to the file
511: &write_gnuplot_file($tmpdir,$filename,$target);
512: $filename = &Apache::lonnet::escape($filename);
513: ## return image tag for the plot
514: if ($target eq 'web') {
515: $result .= <<"ENDIMAGE";
516: <img src = "/cgi-bin/plot.gif?file=$filename.data&output=gif"
517: width = "$plot{'width'}"
518: height = "$plot{'height'}"
519: align = "$plot{'align'}"
520: alt = "$plot{'alttag'}" />
521: ENDIMAGE
522: } elsif ($target eq 'tex') {
523: &Apache::lonnet::ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
524:
525: $result = '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics[width='.$plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.eps}';
526: }
527: } elsif ($target eq 'edit') {
528: $result.=&Apache::edit::tag_end($target,$token);
529: }
530: return $result;
531: }
532:
533:
534: ##--------------------------------------------------------------- xtics
535: sub start_xtics {
536: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
537: my $result='';
538: if ($target eq 'web' || $target eq 'tex') {
539: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
540: $tagstack->[-1]);
541: } elsif ($target eq 'edit') {
542: $result .= &Apache::edit::tag_start($target,$token,'xtics');
543: $result .= &edit_attributes($target,$token,\%tic_defaults,
544: \@tic_edit_order);
545: } elsif ($target eq 'modified') {
546: my $constructtag=&Apache::edit::get_new_args
547: ($token,$parstack,$safeeval,keys(%tic_defaults));
548: if ($constructtag) {
549: $result = &Apache::edit::rebuild_tag($token);
550: }
551: }
552: return $result;
553: }
554:
555: sub end_xtics {
556: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
557: my $result = '';
558: if ($target eq 'web' || $target eq 'tex') {
559: } elsif ($target eq 'edit') {
560: $result.=&Apache::edit::tag_end($target,$token);
561: }
562: return $result;
563: }
564:
565: ##--------------------------------------------------------------- ytics
566: sub start_ytics {
567: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
568: my $result='';
569: if ($target eq 'web' || $target eq 'tex') {
570: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
571: $tagstack->[-1]);
572: } elsif ($target eq 'edit') {
573: $result .= &Apache::edit::tag_start($target,$token,'ytics');
574: $result .= &edit_attributes($target,$token,\%tic_defaults,
575: \@tic_edit_order);
576: } elsif ($target eq 'modified') {
577: my $constructtag=&Apache::edit::get_new_args
578: ($token,$parstack,$safeeval,keys(%tic_defaults));
579: if ($constructtag) {
580: $result = &Apache::edit::rebuild_tag($token);
581: }
582: }
583: return $result;
584: }
585:
586: sub end_ytics {
587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
588: my $result = '';
589: if ($target eq 'web' || $target eq 'tex') {
590: } elsif ($target eq 'edit') {
591: $result.=&Apache::edit::tag_end($target,$token);
592: }
593: return $result;
594: }
595:
596:
597: ##----------------------------------------------------------------- key
598: sub start_key {
599: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
600: my $result='';
601: if ($target eq 'web' || $target eq 'tex') {
602: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
603: $tagstack->[-1]);
604: } elsif ($target eq 'edit') {
605: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
606: $result .= &edit_attributes($target,$token,\%key_defaults);
607: } elsif ($target eq 'modified') {
608: my $constructtag=&Apache::edit::get_new_args
609: ($token,$parstack,$safeeval,keys(%key_defaults));
610: if ($constructtag) {
611: $result = &Apache::edit::rebuild_tag($token);
612: }
613: }
614: return $result;
615: }
616:
617: sub end_key {
618: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
619: my $result = '';
620: if ($target eq 'web' || $target eq 'tex') {
621: } elsif ($target eq 'edit') {
622: $result.=&Apache::edit::tag_end($target,$token);
623: }
624: return $result;
625: }
626:
627: ##------------------------------------------------------------------- title
628: sub start_title {
629: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
630: my $result='';
631: if ($target eq 'web' || $target eq 'tex') {
632: $title = &Apache::lonxml::get_all_text("/title",$parser);
633: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
634: $title =~ s/\n/ /g;
635: if (length($title) > $max_str_len) {
636: $title = substr($title,0,$max_str_len);
637: }
638: } elsif ($target eq 'edit') {
639: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
640: my $text=&Apache::lonxml::get_all_text("/title",$parser);
641: $result.=&Apache::edit::end_row().
642: &Apache::edit::start_spanning_row().
643: &Apache::edit::editline('',$text,'',60);
644: } elsif ($target eq 'modified') {
645: my $text=$$parser[-1]->get_text("/title");
646: $result.=&Apache::edit::rebuild_tag($token);
647: $result.=&Apache::edit::modifiedfield($token);
648: }
649: return $result;
650: }
651:
652: sub end_title {
653: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
654: my $result = '';
655: if ($target eq 'web' || $target eq 'tex') {
656: } elsif ($target eq 'edit') {
657: $result.=&Apache::edit::tag_end($target,$token);
658: }
659: return $result;
660: }
661: ##------------------------------------------------------------------- xlabel
662: sub start_xlabel {
663: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
664: my $result='';
665: if ($target eq 'web' || $target eq 'tex') {
666: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
667: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
668: $xlabel =~ s/\n/ /g;
669: if (length($xlabel) > $max_str_len) {
670: $xlabel = substr($xlabel,0,$max_str_len);
671: }
672: } elsif ($target eq 'edit') {
673: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
674: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
675: $result.=&Apache::edit::end_row().
676: &Apache::edit::start_spanning_row().
677: &Apache::edit::editline('',$text,'',60);
678: } elsif ($target eq 'modified') {
679: my $text=$$parser[-1]->get_text("/xlabel");
680: $result.=&Apache::edit::rebuild_tag($token);
681: $result.=&Apache::edit::modifiedfield($token);
682: }
683: return $result;
684: }
685:
686: sub end_xlabel {
687: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
688: my $result = '';
689: if ($target eq 'web' || $target eq 'tex') {
690: } elsif ($target eq 'edit') {
691: $result.=&Apache::edit::tag_end($target,$token);
692: }
693: return $result;
694: }
695:
696: ##------------------------------------------------------------------- ylabel
697: sub start_ylabel {
698: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
699: my $result='';
700: if ($target eq 'web' || $target eq 'tex') {
701: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
702: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
703: $ylabel =~ s/\n/ /g;
704: if (length($ylabel) > $max_str_len) {
705: $ylabel = substr($ylabel,0,$max_str_len);
706: }
707: } elsif ($target eq 'edit') {
708: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
709: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
710: $result .= &Apache::edit::end_row().
711: &Apache::edit::start_spanning_row().
712: &Apache::edit::editline('',$text,'',60);
713: } elsif ($target eq 'modified') {
714: my $text=$$parser[-1]->get_text("/ylabel");
715: $result.=&Apache::edit::rebuild_tag($token);
716: $result.=&Apache::edit::modifiedfield($token);
717: }
718: return $result;
719: }
720:
721: sub end_ylabel {
722: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
723: my $result = '';
724: if ($target eq 'web' || $target eq 'tex') {
725: } elsif ($target eq 'edit') {
726: $result.=&Apache::edit::tag_end($target,$token);
727: }
728: return $result;
729: }
730:
731: ##------------------------------------------------------------------- label
732: sub start_label {
733: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
734: my $result='';
735: if ($target eq 'web' || $target eq 'tex') {
736: my %label;
737: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
738: $tagstack->[-1]);
739: my $text = &Apache::lonxml::get_all_text("/label",$parser);
740: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
741: $text =~ s/\n/ /g;
742: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
743: $label{'text'} = $text;
744: push(@labels,\%label);
745: } elsif ($target eq 'edit') {
746: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
747: $result .= &edit_attributes($target,$token,\%label_defaults);
748: my $text = &Apache::lonxml::get_all_text("/label",$parser);
749: $result .= &Apache::edit::end_row().
750: &Apache::edit::start_spanning_row().
751: &Apache::edit::editline('',$text,'',60);
752: } elsif ($target eq 'modified') {
753: &Apache::edit::get_new_args
754: ($token,$parstack,$safeeval,keys(%label_defaults));
755: $result.=&Apache::edit::rebuild_tag($token);
756: my $text=$$parser[-1]->get_text("/label");
757: $result.=&Apache::edit::modifiedfield($token);
758: }
759: return $result;
760: }
761:
762: sub end_label {
763: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
764: my $result = '';
765: if ($target eq 'web' || $target eq 'tex') {
766: } elsif ($target eq 'edit') {
767: $result.=&Apache::edit::tag_end($target,$token);
768: }
769: return $result;
770: }
771:
772: ##------------------------------------------------------------------- curve
773: sub start_curve {
774: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
775: my $result='';
776: &Apache::lonxml::register('Apache::lonplot',('function','data'));
777: push (@Apache::lonxml::namespace,'curve');
778: if ($target eq 'web' || $target eq 'tex') {
779: my %curve;
780: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
781: $tagstack->[-1]);
782: push (@curves,\%curve);
783: } elsif ($target eq 'edit') {
784: $result .= &Apache::edit::tag_start($target,$token,'Curve');
785: $result .= &help_win($curve_help_text);
786: $result .= &edit_attributes($target,$token,\%curve_defaults,
787: \@curve_edit_order);
788: } elsif ($target eq 'modified') {
789: my $constructtag=&Apache::edit::get_new_args
790: ($token,$parstack,$safeeval,keys(%curve_defaults));
791: if ($constructtag) {
792: $result = &Apache::edit::rebuild_tag($token);
793: $result.= &Apache::edit::handle_insert();
794: }
795: }
796: return $result;
797: }
798:
799: sub end_curve {
800: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
801: my $result = '';
802: pop @Apache::lonxml::namespace;
803: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
804: if ($target eq 'web' || $target eq 'tex') {
805: } elsif ($target eq 'edit') {
806: $result.=&Apache::edit::tag_end($target,$token);
807: }
808: return $result;
809: }
810:
811: ##------------------------------------------------------------ curve function
812: sub start_function {
813: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
814: my $result='';
815: if ($target eq 'web' || $target eq 'tex') {
816: if (exists($curves[-1]->{'data'})) {
817: &Apache::lonxml::warning
818: ('Use of the <b>curve function</b> tag precludes use of '.
819: ' the <b>curve data</b> tag. '.
820: 'The curve data tag will be omitted in favor of the '.
821: 'curve function declaration.');
822: delete $curves[-1]->{'data'} ;
823: }
824: my $function = &Apache::lonxml::get_all_text("/function",$parser);
825: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
826: $curves[-1]->{'function'} = $function;
827: } elsif ($target eq 'edit') {
828: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
829: my $text = &Apache::lonxml::get_all_text("/function",$parser);
830: $result .= &Apache::edit::end_row().
831: &Apache::edit::start_spanning_row().
832: &Apache::edit::editline('',$text,'',60);
833: } elsif ($target eq 'modified') {
834: $result.=&Apache::edit::rebuild_tag($token);
835: my $text=$$parser[-1]->get_text("/function");
836: $result.=&Apache::edit::modifiedfield($token);
837: }
838: return $result;
839: }
840:
841: sub end_function {
842: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
843: my $result = '';
844: if ($target eq 'web' || $target eq 'tex') {
845: } elsif ($target eq 'edit') {
846: $result .= &Apache::edit::end_table();
847: }
848: return $result;
849: }
850:
851: ##------------------------------------------------------------ curve data
852: sub start_data {
853: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
854: my $result='';
855: if ($target eq 'web' || $target eq 'tex') {
856: if (exists($curves[-1]->{'function'})) {
857: &Apache::lonxml::warning
858: ('Use of the <b>curve function</b> tag precludes use of '.
859: ' the <b>curve data</b> tag. '.
860: 'The curve function tag will be omitted in favor of the '.
861: 'curve data declaration.');
862: delete($curves[-1]->{'function'});
863: }
864: my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
865: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
866: # Deal with cases where we're given an array...
867: if ($datatext =~ /^\@/) {
868: $datatext = &Apache::run::run('return "'.$datatext.'"',
869: $safeeval,1);
870: }
871: $datatext =~ s/\s+/ /g;
872: # Need to do some error checking on the @data array -
873: # make sure it's all numbers and make sure each array
874: # is of the same length.
875: my @data;
876: if ($datatext =~ /,/) { # comma deliminated
877: @data = split /,/,$datatext;
878: } else { # Assume it's space seperated.
879: @data = split / /,$datatext;
880: }
881: for (my $i=0;$i<=$#data;$i++) {
882: # Check that it's non-empty
883: if (! defined($data[$i])) {
884: &Apache::lonxml::warning(
885: 'undefined curve data value. Replacing with '.
886: ' pi/e = 1.15572734979092');
887: $data[$i] = 1.15572734979092;
888: }
889: # Check that it's a number
890: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
891: &Apache::lonxml::warning(
892: 'Bad curve data value of '.$data[$i].' Replacing with '.
893: ' pi/e = 1.15572734979092');
894: $data[$i] = 1.15572734979092;
895: }
896: }
897: # complain if the number of data points is not the same as
898: # in previous sets of data.
899: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
900: &Apache::lonxml::warning
901: ('Number of data points is not consistent with previous '.
902: 'number of data points');
903: }
904: push @{$curves[-1]->{'data'}},\@data;
905: } elsif ($target eq 'edit') {
906: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
907: my $text = &Apache::lonxml::get_all_text("/data",$parser);
908: $result .= &Apache::edit::end_row().
909: &Apache::edit::start_spanning_row().
910: &Apache::edit::editline('',$text,'',60);
911: } elsif ($target eq 'modified') {
912: $result.=&Apache::edit::rebuild_tag($token);
913: my $text=$$parser[-1]->get_text("/data");
914: $result.=&Apache::edit::modifiedfield($token);
915: }
916: return $result;
917: }
918:
919: sub end_data {
920: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
921: my $result = '';
922: if ($target eq 'web' || $target eq 'tex') {
923: } elsif ($target eq 'edit') {
924: $result .= &Apache::edit::end_table();
925: }
926: return $result;
927: }
928:
929: ##------------------------------------------------------------------- axis
930: sub start_axis {
931: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
932: my $result='';
933: if ($target eq 'web' || $target eq 'tex') {
934: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
935: $tagstack->[-1]);
936: } elsif ($target eq 'edit') {
937: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
938: $result .= &edit_attributes($target,$token,\%axis_defaults,
939: \@axis_edit_order);
940: } elsif ($target eq 'modified') {
941: my $constructtag=&Apache::edit::get_new_args
942: ($token,$parstack,$safeeval,keys(%axis_defaults));
943: if ($constructtag) {
944: $result = &Apache::edit::rebuild_tag($token);
945: }
946: }
947: return $result;
948: }
949:
950: sub end_axis {
951: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
952: my $result = '';
953: if ($target eq 'web' || $target eq 'tex') {
954: } elsif ($target eq 'edit') {
955: $result.=&Apache::edit::tag_end($target,$token);
956: } elsif ($target eq 'modified') {
957: }
958: return $result;
959: }
960:
961: ###################################################################
962: ## ##
963: ## Utility Functions ##
964: ## ##
965: ###################################################################
966:
967: ##----------------------------------------------------------- set_defaults
968: sub set_defaults {
969: my ($var,$defaults) = @_;
970: my $key;
971: foreach $key (keys(%$defaults)) {
972: $var->{$key} = $defaults->{$key}->{'default'};
973: }
974: }
975:
976: ##------------------------------------------------------------------- misc
977: sub get_attributes{
978: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
979: foreach my $attr (keys(%{$defaults})) {
980: if ($attr eq 'texwidth') {
981: $values->{$attr} =
982: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
983: } else {
984: $values->{$attr} =
985: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
986: }
987: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
988: $values->{$attr} = $defaults->{$attr}->{'default'};
989: next;
990: }
991: my $test = $defaults->{$attr}->{'test'};
992: if (! &$test($values->{$attr})) {
993: &Apache::lonxml::warning
994: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
995: .$defaults->{$attr}->{'default'} );
996: $values->{$attr} = $defaults->{$attr}->{'default'};
997: }
998: }
999: return ;
1000: }
1001:
1002: ##------------------------------------------------------- write_gnuplot_file
1003: sub write_gnuplot_file {
1004: my ($tmpdir,$filename,$target)= @_;
1005: my $gnuplot_input = '';
1006: my $curve;
1007: # Collect all the colors
1008: my @Colors;
1009: push @Colors, $plot{'bgcolor'};
1010: push @Colors, $plot{'fgcolor'};
1011: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1012: foreach $curve (@curves) {
1013: push @Colors, ($curve->{'color'} ne '' ?
1014: $curve->{'color'} :
1015: $plot{'fgcolor'} );
1016: }
1017: # set term
1018: if ($target eq 'web') {
1019: $gnuplot_input .= 'set term gif ';
1020: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
1021: $gnuplot_input .= $plot{'font'} . ' ';
1022: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1023: $gnuplot_input .= "@Colors\n";
1024: # set output
1025: $gnuplot_input .= "set output\n";
1026: } elsif ($target eq 'tex') {
1027: $gnuplot_input .= "set term postscript eps monochrome solid\n";
1028: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1029: &Apache::lonnet::unescape($filename).".eps\"\n";
1030: }
1031: # cartesian or polar?
1032: if (lc($plot{'plottype'}) eq 'polar') {
1033: $gnuplot_input .= 'set polar'.$/;
1034: } else {
1035: # Assume Cartesian
1036: }
1037: # grid
1038: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1039: # border
1040: $gnuplot_input .= ($plot{'border'} eq 'on'?
1041: 'set border'.$/ :
1042: 'set noborder'.$/ );
1043: # sampling rate for non-data curves
1044: $gnuplot_input .= "set samples $plot{'samples'}\n";
1045: # title, xlabel, ylabel
1046: # titles
1047: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
1048: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
1049: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
1050: # tics
1051: if (%xtics) {
1052: $gnuplot_input .= "set xtics $xtics{'location'} ";
1053: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1054: $gnuplot_input .= "$xtics{'start'}, ";
1055: $gnuplot_input .= "$xtics{'increment'}, ";
1056: $gnuplot_input .= "$xtics{'end'}\n";
1057: }
1058: if (%ytics) {
1059: $gnuplot_input .= "set ytics $ytics{'location'} ";
1060: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1061: $gnuplot_input .= "$ytics{'start'}, ";
1062: $gnuplot_input .= "$ytics{'increment'}, ";
1063: $gnuplot_input .= "$ytics{'end'}\n";
1064: }
1065: # axis
1066: if (%axis) {
1067: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1068: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1069: }
1070: # Key
1071: if (%key) {
1072: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1073: if ($key{'title'} ne '') {
1074: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1075: }
1076: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1077: } else {
1078: $gnuplot_input .= 'set nokey'.$/;
1079: }
1080: # labels
1081: my $label;
1082: foreach $label (@labels) {
1083: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1084: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
1085: }
1086: if ($target eq 'tex') {
1087: $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
1088: $gnuplot_input .="\n";
1089: }
1090: # curves
1091: $gnuplot_input .= 'plot ';
1092: for (my $i = 0;$i<=$#curves;$i++) {
1093: $curve = $curves[$i];
1094: $gnuplot_input.= ', ' if ($i > 0);
1095: if (exists($curve->{'function'})) {
1096: $gnuplot_input.=
1097: $curve->{'function'}.' title "'.
1098: $curve->{'name'}.'" with '.
1099: $curve->{'linestyle'};
1100: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1101: if (($curve->{'linestyle'} eq 'points') ||
1102: ($curve->{'linestyle'} eq 'linespoints') ||
1103: ($curve->{'linestyle'} eq 'errorbars') ||
1104: ($curve->{'linestyle'} eq 'xerrorbars') ||
1105: ($curve->{'linestyle'} eq 'yerrorbars') ||
1106: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1107: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1108: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1109: }
1110: } elsif (exists($curve->{'data'})) {
1111: # Store data values in $datatext
1112: my $datatext = '';
1113: # get new filename
1114: my $datafilename = "$tmpdir/$filename.data.$i";
1115: my $fh=Apache::File->new(">$datafilename");
1116: # Compile data
1117: my @Data = @{$curve->{'data'}};
1118: my @Data0 = @{$Data[0]};
1119: for (my $i =0; $i<=$#Data0; $i++) {
1120: my $dataset;
1121: foreach $dataset (@Data) {
1122: $datatext .= $dataset->[$i] . ' ';
1123: }
1124: $datatext .= $/;
1125: }
1126: # write file
1127: print $fh $datatext;
1128: close ($fh);
1129: # generate gnuplot text
1130: $gnuplot_input.= '"'.$datafilename.'" title "'.
1131: $curve->{'name'}.'" with '.
1132: $curve->{'linestyle'};
1133: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1134: if (($curve->{'linestyle'} eq 'points') ||
1135: ($curve->{'linestyle'} eq 'linespoints') ||
1136: ($curve->{'linestyle'} eq 'errorbars') ||
1137: ($curve->{'linestyle'} eq 'xerrorbars') ||
1138: ($curve->{'linestyle'} eq 'yerrorbars') ||
1139: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1140: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1141: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1142: }
1143: }
1144: }
1145: # Write the output to a file.
1146: my $fh=Apache::File->new(">$tmpdir$filename.data");
1147: print $fh $gnuplot_input;
1148: close($fh);
1149: # That's all folks.
1150: return ;
1151: }
1152:
1153: #---------------------------------------------- check_inputs
1154: sub check_inputs {
1155: ## Note: no inputs, no outputs - this acts only on global variables.
1156: ## Make sure we have all the input we need:
1157: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1158: if (! %key ) {} # No key for this plot, thats okay
1159: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1160: if (! defined($title )) {} # No title for this plot, thats okay
1161: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1162: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1163: if ($#labels < 0) { } # No labels for this plot, thats okay
1164: if ($#curves < 0) {
1165: &Apache::lonxml::warning("No curves specified for plot!!!!");
1166: return '';
1167: }
1168: my $curve;
1169: foreach $curve (@curves) {
1170: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1171: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1172: return '';
1173: }
1174: }
1175: }
1176:
1177: #------------------------------------------------ make_edit
1178: sub edit_attributes {
1179: my ($target,$token,$defaults,$keys) = @_;
1180: my ($result,@keys);
1181: if ($keys && ref($keys) eq 'ARRAY') {
1182: @keys = @$keys;
1183: } else {
1184: @keys = sort(keys(%$defaults));
1185: }
1186: foreach my $attr (@keys) {
1187: # append a ' ' to the description if it doesn't have one already.
1188: my $description = $defaults->{$attr}->{'description'};
1189: $description .= ' ' if ($description !~ / $/);
1190: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1191: $result .= &Apache::edit::text_arg
1192: ($description,$attr,$token,
1193: $defaults->{$attr}->{'size'});
1194: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1195: $result .= &Apache::edit::select_arg
1196: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1197: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1198: $result .= &Apache::edit::select_arg
1199: ($description,$attr,['on','off'],$token);
1200: }
1201: $result .= '<br />';
1202: }
1203: return $result;
1204: }
1205:
1206:
1207: ###################################################################
1208: ## ##
1209: ## Insertion functions for editing plots ##
1210: ## ##
1211: ###################################################################
1212:
1213: sub insert_gnuplot {
1214: my $result = '';
1215: # plot attributes
1216: $result .= "\n<gnuplot ";
1217: foreach my $attr (keys(%gnuplot_defaults)) {
1218: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1219: }
1220: $result .= ">";
1221: # Add the components (most are commented out for simplicity)
1222: # $result .= &insert_key();
1223: # $result .= &insert_axis();
1224: # $result .= &insert_title();
1225: # $result .= &insert_xlabel();
1226: # $result .= &insert_ylabel();
1227: $result .= &insert_curve();
1228: # close up the <gnuplot>
1229: $result .= "\n</gnuplot>";
1230: return $result;
1231: }
1232:
1233: sub insert_tics {
1234: my $result;
1235: $result .= &insert_xtics() . &insert_ytics;
1236: return $result;
1237: }
1238:
1239: sub insert_xtics {
1240: my $result;
1241: $result .= "\n <xtics ";
1242: foreach my $attr (keys(%tic_defaults)) {
1243: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1244: }
1245: $result .= "/>";
1246: return $result;
1247: }
1248:
1249: sub insert_ytics {
1250: my $result;
1251: $result .= "\n <ytics ";
1252: foreach my $attr (keys(%tic_defaults)) {
1253: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1254: }
1255: $result .= "/>";
1256: return $result;
1257: }
1258:
1259: sub insert_key {
1260: my $result;
1261: $result .= "\n <key ";
1262: foreach my $attr (keys(%key_defaults)) {
1263: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1264: }
1265: $result .= " />";
1266: return $result;
1267: }
1268:
1269: sub insert_axis{
1270: my $result;
1271: $result .= "\n <axis ";
1272: foreach my $attr (keys(%axis_defaults)) {
1273: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1274: }
1275: $result .= " />";
1276: return $result;
1277: }
1278:
1279: sub insert_title { return "\n <title></title>"; }
1280: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1281: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1282:
1283: sub insert_label {
1284: my $result;
1285: $result .= "\n <label ";
1286: foreach my $attr (keys(%label_defaults)) {
1287: $result .= "\n $attr=\"".
1288: $label_defaults{$attr}->{'default'}."\"";
1289: }
1290: $result .= "></label>";
1291: return $result;
1292: }
1293:
1294: sub insert_curve {
1295: my $result;
1296: $result .= "\n <curve ";
1297: foreach my $attr (keys(%curve_defaults)) {
1298: $result .= "\n $attr=\"".
1299: $curve_defaults{$attr}->{'default'}."\"";
1300: }
1301: $result .= " >";
1302: $result .= &insert_data().&insert_data()."\n </curve>";
1303: }
1304:
1305: sub insert_function {
1306: my $result;
1307: $result .= "\n <function></function>";
1308: return $result;
1309: }
1310:
1311: sub insert_data {
1312: my $result;
1313: $result .= "\n <data></data>";
1314: return $result;
1315: }
1316:
1317: ##----------------------------------------------------------------------
1318: # Javascript functions to display help for tags
1319:
1320: sub make_javascript {
1321: my $helpwindowwidth = 400;
1322: my $helpwindowheight = 400;
1323: my $result = '';
1324: $result.=<<"ENDFUNCTION";
1325: <script language="JavaScript">
1326: function openWin(text)
1327: {
1328: newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
1329: newWin.document.open("text/html", "replace");
1330: newWin.document.writeln(text);
1331: newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
1332: newWin.document.close();
1333: }
1334: </script>
1335: ENDFUNCTION
1336: return $result;
1337: }
1338:
1339: sub help_win {
1340: my ($helptext)=@_;
1341: $helptext =~ s/\n/ /g;
1342: $helptext =~ s/\'/\\\'/g;
1343: my $result = '';
1344: $result.=<<"ENDWIN";
1345: <table width="100%"><tr><td align="right">
1346: <a href="javascript:openWin('$helptext')">help</a>
1347: </td></tr></table><hr />
1348: ENDWIN
1349: return $result;
1350: }
1351: ##----------------------------------------------------------------------
1352: 1;
1353: __END__
1354:
1355:
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