1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
4: # $Id: lonplot.pm,v 1.89 2003/09/19 17:53:03 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 warnings FATAL=>'all';
38: no warnings 'uninitialized';
39: use Apache::File;
40: use Apache::response;
41: use Apache::lonxml;
42: use Apache::edit;
43:
44: BEGIN {
45: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
46: }
47:
48: ##
49: ## Description of data structures:
50: ##
51: ## %plot %key %axis
52: ## --------------------------
53: ## height title color
54: ## width box xmin
55: ## bgcolor pos xmax
56: ## fgcolor ymin
57: ## transparent ymax
58: ## grid
59: ## border
60: ## font
61: ## align
62: ##
63: ## @labels: $labels[$i] = \%label
64: ## %label: text, xpos, ypos, justify
65: ##
66: ## @curves: $curves[$i] = \%curve
67: ## %curve: name, linestyle, ( function | data )
68: ##
69: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
70: ## [y1,y2,y3,y4] ]
71: ##
72:
73: ###################################################################
74: ## ##
75: ## Tests used in checking the validitity of input ##
76: ## ##
77: ###################################################################
78:
79: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
80: # is longer than this, it will be truncated.
81:
82: my %linestyles =
83: (
84: lines => 2, # Maybe this will be used in the future
85: linespoints => 2, # to check on whether or not they have
86: dots => 2, # supplied enough <data></data> fields
87: points => 2, # to use the given line style. But for
88: steps => 2, # now there are more important things
89: fsteps => 2, # for me to deal with.
90: histeps => 2,
91: errorbars => 3,
92: xerrorbars => [3,4],
93: yerrorbars => [3,4],
94: xyerrorbars => [4,6],
95: boxes => 3,
96: vector => 4
97: );
98:
99: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
100: my $real_test =
101: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
102: my $pos_real_test =
103: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
104: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
105: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
106: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
107: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
108: my $linestyle_test = sub {exists($linestyles{$_[0]})};
109: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
110:
111: ###################################################################
112: ## ##
113: ## Attribute metadata ##
114: ## ##
115: ###################################################################
116: my @gnuplot_edit_order =
117: qw/alttag bgcolor fgcolor height width font transparent grid samples
118: border align texwidth plottype/;
119:
120: my $gnuplot_help_text = <<"ENDPLOTHELP";
121: <p>
122: The <b>gnuplot</b> tag allows an author to design a plot which can
123: be created on the fly. This is intended for use in homework problems
124: where each student needs to see a distinct plot. It can be used in
125: conjunction with a <b>script</b> tag to generate random plots.
126: </p><p>
127: A <b>gnuplot</b> tag can contain the following sub-tags:
128: </p>
129: <dl>
130: <dt> Plot Label
131: <dd> Allows you to place text at a given (x,y) coordinate on the plot.
132: <dt> Plot Title
133: <dd> The title of the plot
134: <dt> Plot Xlabel
135: <dd> The label on the horizontal axis of the plot
136: <dt> Plot Ylabel
137: <dd> The label on the vertical axis of the plot
138: <dt> Plot Axes
139: <dd> allows specification of the x and y ranges displayed in the plot
140: <dt> Plot Key
141: <dd> Lists the functions displayed in the plot.
142: <dt> Plot Curve
143: <dd> Sets the data used in the plot.
144: <dt> Plot Tics
145: <dd> Allows specification of the x and y coordinate 'tics' on the axes.
146: This is mostly used to adjust the grid lines when a grid is displayed.
147: </dl>
148: If you are having trouble with your plot, please read the help
149: available on Plot Curve.
150: ENDPLOTHELP
151:
152: my %gnuplot_defaults =
153: (
154: alttag => {
155: default => 'dynamically generated plot',
156: test => $words_test,
157: description => 'brief description of the plot',
158: edit_type => 'entry',
159: size => '40'
160: },
161: height => {
162: default => 300,
163: test => $int_test,
164: description => 'height of image (pixels)',
165: edit_type => 'entry',
166: size => '10'
167: },
168: width => {
169: default => 400,
170: test => $int_test,
171: description => 'width of image (pixels)',
172: edit_type => 'entry',
173: size => '10'
174: },
175: bgcolor => {
176: default => 'xffffff',
177: test => $color_test,
178: description => 'background color of image (xffffff)',
179: edit_type => 'entry',
180: size => '10'
181: },
182: fgcolor => {
183: default => 'x000000',
184: test => $color_test,
185: description => 'foreground color of image (x000000)',
186: edit_type => 'entry',
187: size => '10'
188: },
189: transparent => {
190: default => 'off',
191: test => $onoff_test,
192: description => 'Transparent image',
193: edit_type => 'onoff'
194: },
195: grid => {
196: default => 'on',
197: test => $onoff_test,
198: description => 'Display grid',
199: edit_type => 'onoff'
200: },
201: border => {
202: default => 'on',
203: test => $onoff_test,
204: description => 'Draw border around plot',
205: edit_type => 'onoff'
206: },
207: font => {
208: default => 'medium',
209: test => $sml_test,
210: description => 'Size of font to use',
211: edit_type => 'choice',
212: choices => ['small','medium','large']
213: },
214: samples => {
215: default => '100',
216: test => $int_test,
217: description => 'Number of samples for non-data plots',
218: edit_type => 'choice',
219: choices => ['100','200','500','1000','2000','5000']
220: },
221: align => {
222: default => 'center',
223: test => sub {$_[0]=~/^(left|right|center)$/},
224: description => 'alignment for image in html',
225: edit_type => 'choice',
226: choices => ['left','right','center']
227: },
228: texwidth => {
229: default => '93',
230: test => $int_test,
231: description => 'Width of plot when printed (mm)',
232: edit_type => 'entry',
233: size => '5'
234: },
235: plottype => {
236: default => 'Cartesian',
237: test => sub {$_[0]=~/^(Polar|Cartesian)$/},
238: description => 'Plot type:',
239: edit_type => 'choice',
240: choices => ['Polar','Cartesian']
241: },
242: );
243:
244: my %key_defaults =
245: (
246: title => {
247: default => '',
248: test => $words_test,
249: description => 'Title of key',
250: edit_type => 'entry',
251: size => '40'
252: },
253: box => {
254: default => 'off',
255: test => $onoff_test,
256: description => 'Draw a box around the key?',
257: edit_type => 'onoff'
258: },
259: pos => {
260: default => 'top right',
261: test => $key_pos_test,
262: description => 'position of the key on the plot',
263: edit_type => 'choice',
264: choices => ['top left','top right','bottom left','bottom right',
265: 'outside','below']
266: }
267: );
268:
269: my %label_defaults =
270: (
271: xpos => {
272: default => 0,
273: test => $real_test,
274: description => 'x position of label (graph coordinates)',
275: edit_type => 'entry',
276: size => '10'
277: },
278: ypos => {
279: default => 0,
280: test => $real_test,
281: description => 'y position of label (graph coordinates)',
282: edit_type => 'entry',
283: size => '10'
284: },
285: justify => {
286: default => 'left',
287: test => sub {$_[0]=~/^(left|right|center)$/},
288: description => 'justification of the label text on the plot',
289: edit_type => 'choice',
290: choices => ['left','right','center']
291: }
292: );
293:
294: my @tic_edit_order = ('location','mirror','start','increment','end',
295: 'minorfreq');
296: my %tic_defaults =
297: (
298: location => {
299: default => 'border',
300: test => sub {$_[0]=~/^(border|axis)$/},
301: description => 'Location of major tick marks',
302: edit_type => 'choice',
303: choices => ['border','axis']
304: },
305: mirror => {
306: default => 'on',
307: test => $onoff_test,
308: description => 'mirror ticks on opposite axis?',
309: edit_type => 'onoff'
310: },
311: start => {
312: default => '-10.0',
313: test => $real_test,
314: description => 'Start major ticks at',
315: edit_type => 'entry',
316: size => '10'
317: },
318: increment => {
319: default => '1.0',
320: test => $real_test,
321: description => 'Place a major tick every',
322: edit_type => 'entry',
323: size => '10'
324: },
325: end => {
326: default => ' 10.0',
327: test => $real_test,
328: description => 'Stop major ticks at ',
329: edit_type => 'entry',
330: size => '10'
331: },
332: minorfreq => {
333: default => '0',
334: test => $int_test,
335: description => 'Number of minor tics between major tick marks',
336: edit_type => 'entry',
337: size => '10'
338: },
339: );
340:
341: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
342: my %axis_defaults =
343: (
344: color => {
345: default => 'x000000',
346: test => $color_test,
347: description => 'color of grid lines (x000000)',
348: edit_type => 'entry',
349: size => '10'
350: },
351: xmin => {
352: default => '-10.0',
353: test => $real_test,
354: description => 'minimum x-value shown in plot',
355: edit_type => 'entry',
356: size => '10'
357: },
358: xmax => {
359: default => ' 10.0',
360: test => $real_test,
361: description => 'maximum x-value shown in plot',
362: edit_type => 'entry',
363: size => '10'
364: },
365: ymin => {
366: default => '-10.0',
367: test => $real_test,
368: description => 'minimum y-value shown in plot',
369: edit_type => 'entry',
370: size => '10'
371: },
372: ymax => {
373: default => ' 10.0',
374: test => $real_test,
375: description => 'maximum y-value shown in plot',
376: edit_type => 'entry',
377: size => '10'
378: }
379: );
380:
381: my $curve_help_text = <<"ENDCURVEHELP";
382: The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
383: There are two ways of entering the information:
384: <dl>
385: <dt> Curve Data
386: <dd> Using a <b>data</b> tag you can specify the numbers used to produce
387: the plot.
388: <p>
389: By default, two <b>data</b> tags will be available in a plot. The
390: first will specify X coordinates of the data and the second will
391: give the Y coordinates of the data. When working with a linestyle that
392: requires more than two data sets, inserting another <b>data</b> tag is
393: required. Unfortunately, you must make sure the <b>data</b> tags appear
394: in the order gnuplot expects the data.
395: </p><p>
396: Specifying the data should usually be done with a perl variable or array,
397: such as \@Xdata and \@Ydata. You may also specify numerical data seperated
398: by commas. Again, the order of the <b>data</b> tags is important. The
399: first tag will be the X data and the second will be the Y data.
400: </p>
401: <dt> Curve Function
402: <dd> The <b>function</b> tag allows you to specify the curve to be
403: plotted as a formula that gnuplot can understand. <b>Be careful using this
404: tag.</b> It is surprisingly easy to give gnuplot a function it cannot deal
405: with properly. Be explicit: 2*sin(2*3.141592*x/4) will work but
406: 2sin(2*3.141592x/4) will not. If you do not receive any errors in the
407: gnuplot data but still do not have an image produced, it is likely there
408: is an error in your <b>function</b> tag.
409: </dl>
410: ENDCURVEHELP
411:
412: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
413:
414: my %curve_defaults =
415: (
416: color => {
417: default => 'x000000',
418: test => $color_test,
419: description => 'color of curve (x000000)',
420: edit_type => 'entry',
421: size => '10'
422: },
423: name => {
424: default => '',
425: test => $words_test,
426: description => 'name of curve to appear in key',
427: edit_type => 'entry',
428: size => '20'
429: },
430: linestyle => {
431: default => 'lines',
432: test => $linestyle_test,
433: description => 'Line style',
434: edit_type => 'choice',
435: choices => [keys(%linestyles)]
436: },
437: # gnuplots term=gif driver does not handle linewidth :(
438: # linewidth => {
439: # default => 1,
440: # test => $int_test,
441: # description => 'Line width (may not apply to all line styles)',
442: # edit_type => 'choice',
443: # choices => [1,2,3,4,5,6,7,8,9,10]
444: # },
445: pointsize => {
446: default => 1,
447: test => $pos_real_test,
448: description => 'point size (may not apply to all line styles)',
449: edit_type => 'entry',
450: size => '5'
451: },
452: pointtype => {
453: default => 1,
454: test => $int_test,
455: description => 'point type (may not apply to all line styles)',
456: edit_type => 'choice',
457: choices => [0,1,2,3,4,5,6]
458: }
459: );
460:
461: ###################################################################
462: ## ##
463: ## parsing and edit rendering ##
464: ## ##
465: ###################################################################
466: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
467:
468: sub start_gnuplot {
469: undef(%plot); undef(%key); undef(%axis);
470: undef($title); undef($xlabel); undef($ylabel);
471: undef(@labels); undef(@curves);
472: undef(%xtics); undef(%ytics);
473: #
474: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
475: my $result='';
476: &Apache::lonxml::register('Apache::lonplot',
477: ('title','xlabel','ylabel','key','axis','label','curve',
478: 'xtics','ytics'));
479: push (@Apache::lonxml::namespace,'lonplot');
480: if ($target eq 'web' || $target eq 'tex') {
481: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
482: $tagstack->[-1]);
483: } elsif ($target eq 'edit') {
484: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
485: $result .= &make_javascript();
486: $result .= &help_win($gnuplot_help_text);
487: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
488: \@gnuplot_edit_order);
489: } elsif ($target eq 'modified') {
490: my $constructtag=&Apache::edit::get_new_args
491: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
492: if ($constructtag) {
493: $result = &Apache::edit::rebuild_tag($token);
494: }
495: }
496: return $result;
497: }
498:
499: sub end_gnuplot {
500: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
501: pop @Apache::lonxml::namespace;
502: &Apache::lonxml::deregister('Apache::lonplot',
503: ('title','xlabel','ylabel','key','axis','label','curve'));
504: my $result = '';
505: my $randnumber;
506: # need to call rand everytime start_script would evaluate, as the
507: # safe space rand number generator and the global rand generator
508: # are not seperate
509: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
510: $target eq 'answer') {
511: $randnumber=int(rand(1000));
512: }
513: if ($target eq 'web' || $target eq 'tex') {
514: &check_inputs(); # Make sure we have all the data we need
515: ##
516: ## Determine filename
517: my $tmpdir = '/home/httpd/perl/tmp/';
518: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
519: '_'.time.'_'.$$.$randnumber.'_plot';
520: ## Write the plot description to the file
521: &write_gnuplot_file($tmpdir,$filename,$target);
522: $filename = &Apache::lonnet::escape($filename);
523: ## return image tag for the plot
524: if ($target eq 'web') {
525: $result .= <<"ENDIMAGE";
526: <img src = "/cgi-bin/plot.gif?file=$filename.data&output=gif"
527: width = "$plot{'width'}"
528: height = "$plot{'height'}"
529: align = "$plot{'align'}"
530: alt = "$plot{'alttag'}" />
531: ENDIMAGE
532: } elsif ($target eq 'tex') {
533: &Apache::lonnet::ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
534:
535: $result = '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics[width='.$plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.eps}';
536: }
537: } elsif ($target eq 'edit') {
538: $result.=&Apache::edit::tag_end($target,$token);
539: }
540: return $result;
541: }
542:
543:
544: ##--------------------------------------------------------------- xtics
545: sub start_xtics {
546: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
547: my $result='';
548: if ($target eq 'web' || $target eq 'tex') {
549: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
550: $tagstack->[-1]);
551: } elsif ($target eq 'edit') {
552: $result .= &Apache::edit::tag_start($target,$token,'xtics');
553: $result .= &edit_attributes($target,$token,\%tic_defaults,
554: \@tic_edit_order);
555: } elsif ($target eq 'modified') {
556: my $constructtag=&Apache::edit::get_new_args
557: ($token,$parstack,$safeeval,keys(%tic_defaults));
558: if ($constructtag) {
559: $result = &Apache::edit::rebuild_tag($token);
560: }
561: }
562: return $result;
563: }
564:
565: sub end_xtics {
566: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
567: my $result = '';
568: if ($target eq 'web' || $target eq 'tex') {
569: } elsif ($target eq 'edit') {
570: $result.=&Apache::edit::tag_end($target,$token);
571: }
572: return $result;
573: }
574:
575: ##--------------------------------------------------------------- ytics
576: sub start_ytics {
577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
578: my $result='';
579: if ($target eq 'web' || $target eq 'tex') {
580: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
581: $tagstack->[-1]);
582: } elsif ($target eq 'edit') {
583: $result .= &Apache::edit::tag_start($target,$token,'ytics');
584: $result .= &edit_attributes($target,$token,\%tic_defaults,
585: \@tic_edit_order);
586: } elsif ($target eq 'modified') {
587: my $constructtag=&Apache::edit::get_new_args
588: ($token,$parstack,$safeeval,keys(%tic_defaults));
589: if ($constructtag) {
590: $result = &Apache::edit::rebuild_tag($token);
591: }
592: }
593: return $result;
594: }
595:
596: sub end_ytics {
597: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
598: my $result = '';
599: if ($target eq 'web' || $target eq 'tex') {
600: } elsif ($target eq 'edit') {
601: $result.=&Apache::edit::tag_end($target,$token);
602: }
603: return $result;
604: }
605:
606:
607: ##----------------------------------------------------------------- key
608: sub start_key {
609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
610: my $result='';
611: if ($target eq 'web' || $target eq 'tex') {
612: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
613: $tagstack->[-1]);
614: } elsif ($target eq 'edit') {
615: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
616: $result .= &edit_attributes($target,$token,\%key_defaults);
617: } elsif ($target eq 'modified') {
618: my $constructtag=&Apache::edit::get_new_args
619: ($token,$parstack,$safeeval,keys(%key_defaults));
620: if ($constructtag) {
621: $result = &Apache::edit::rebuild_tag($token);
622: }
623: }
624: return $result;
625: }
626:
627: sub end_key {
628: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
629: my $result = '';
630: if ($target eq 'web' || $target eq 'tex') {
631: } elsif ($target eq 'edit') {
632: $result.=&Apache::edit::tag_end($target,$token);
633: }
634: return $result;
635: }
636:
637: ##------------------------------------------------------------------- title
638: sub start_title {
639: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
640: my $result='';
641: if ($target eq 'web' || $target eq 'tex') {
642: $title = &Apache::lonxml::get_all_text("/title",$parser);
643: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
644: $title =~ s/\n/ /g;
645: if (length($title) > $max_str_len) {
646: $title = substr($title,0,$max_str_len);
647: }
648: } elsif ($target eq 'edit') {
649: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
650: my $text=&Apache::lonxml::get_all_text("/title",$parser);
651: $result.=&Apache::edit::end_row().
652: &Apache::edit::start_spanning_row().
653: &Apache::edit::editline('',$text,'',60);
654: } elsif ($target eq 'modified') {
655: my $text=$$parser[-1]->get_text("/title");
656: $result.=&Apache::edit::rebuild_tag($token);
657: $result.=&Apache::edit::modifiedfield($token);
658: }
659: return $result;
660: }
661:
662: sub end_title {
663: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
664: my $result = '';
665: if ($target eq 'web' || $target eq 'tex') {
666: } elsif ($target eq 'edit') {
667: $result.=&Apache::edit::tag_end($target,$token);
668: }
669: return $result;
670: }
671: ##------------------------------------------------------------------- xlabel
672: sub start_xlabel {
673: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
674: my $result='';
675: if ($target eq 'web' || $target eq 'tex') {
676: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
677: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
678: $xlabel =~ s/\n/ /g;
679: if (length($xlabel) > $max_str_len) {
680: $xlabel = substr($xlabel,0,$max_str_len);
681: }
682: } elsif ($target eq 'edit') {
683: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
684: my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
685: $result.=&Apache::edit::end_row().
686: &Apache::edit::start_spanning_row().
687: &Apache::edit::editline('',$text,'',60);
688: } elsif ($target eq 'modified') {
689: my $text=$$parser[-1]->get_text("/xlabel");
690: $result.=&Apache::edit::rebuild_tag($token);
691: $result.=&Apache::edit::modifiedfield($token);
692: }
693: return $result;
694: }
695:
696: sub end_xlabel {
697: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
698: my $result = '';
699: if ($target eq 'web' || $target eq 'tex') {
700: } elsif ($target eq 'edit') {
701: $result.=&Apache::edit::tag_end($target,$token);
702: }
703: return $result;
704: }
705:
706: ##------------------------------------------------------------------- ylabel
707: sub start_ylabel {
708: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
709: my $result='';
710: if ($target eq 'web' || $target eq 'tex') {
711: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
712: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
713: $ylabel =~ s/\n/ /g;
714: if (length($ylabel) > $max_str_len) {
715: $ylabel = substr($ylabel,0,$max_str_len);
716: }
717: } elsif ($target eq 'edit') {
718: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
719: my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
720: $result .= &Apache::edit::end_row().
721: &Apache::edit::start_spanning_row().
722: &Apache::edit::editline('',$text,'',60);
723: } elsif ($target eq 'modified') {
724: my $text=$$parser[-1]->get_text("/ylabel");
725: $result.=&Apache::edit::rebuild_tag($token);
726: $result.=&Apache::edit::modifiedfield($token);
727: }
728: return $result;
729: }
730:
731: sub end_ylabel {
732: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
733: my $result = '';
734: if ($target eq 'web' || $target eq 'tex') {
735: } elsif ($target eq 'edit') {
736: $result.=&Apache::edit::tag_end($target,$token);
737: }
738: return $result;
739: }
740:
741: ##------------------------------------------------------------------- label
742: sub start_label {
743: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
744: my $result='';
745: if ($target eq 'web' || $target eq 'tex') {
746: my %label;
747: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
748: $tagstack->[-1]);
749: my $text = &Apache::lonxml::get_all_text("/label",$parser);
750: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
751: $text =~ s/\n/ /g;
752: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
753: $label{'text'} = $text;
754: push(@labels,\%label);
755: } elsif ($target eq 'edit') {
756: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
757: $result .= &edit_attributes($target,$token,\%label_defaults);
758: my $text = &Apache::lonxml::get_all_text("/label",$parser);
759: $result .= &Apache::edit::end_row().
760: &Apache::edit::start_spanning_row().
761: &Apache::edit::editline('',$text,'',60);
762: } elsif ($target eq 'modified') {
763: &Apache::edit::get_new_args
764: ($token,$parstack,$safeeval,keys(%label_defaults));
765: $result.=&Apache::edit::rebuild_tag($token);
766: my $text=$$parser[-1]->get_text("/label");
767: $result.=&Apache::edit::modifiedfield($token);
768: }
769: return $result;
770: }
771:
772: sub end_label {
773: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
774: my $result = '';
775: if ($target eq 'web' || $target eq 'tex') {
776: } elsif ($target eq 'edit') {
777: $result.=&Apache::edit::tag_end($target,$token);
778: }
779: return $result;
780: }
781:
782: ##------------------------------------------------------------------- curve
783: sub start_curve {
784: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
785: my $result='';
786: &Apache::lonxml::register('Apache::lonplot',('function','data'));
787: push (@Apache::lonxml::namespace,'curve');
788: if ($target eq 'web' || $target eq 'tex') {
789: my %curve;
790: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
791: $tagstack->[-1]);
792: push (@curves,\%curve);
793: } elsif ($target eq 'edit') {
794: $result .= &Apache::edit::tag_start($target,$token,'Curve');
795: $result .= &help_win($curve_help_text);
796: $result .= &edit_attributes($target,$token,\%curve_defaults,
797: \@curve_edit_order);
798: } elsif ($target eq 'modified') {
799: my $constructtag=&Apache::edit::get_new_args
800: ($token,$parstack,$safeeval,keys(%curve_defaults));
801: if ($constructtag) {
802: $result = &Apache::edit::rebuild_tag($token);
803: $result.= &Apache::edit::handle_insert();
804: }
805: }
806: return $result;
807: }
808:
809: sub end_curve {
810: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
811: my $result = '';
812: pop @Apache::lonxml::namespace;
813: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
814: if ($target eq 'web' || $target eq 'tex') {
815: } elsif ($target eq 'edit') {
816: $result.=&Apache::edit::tag_end($target,$token);
817: }
818: return $result;
819: }
820:
821: ##------------------------------------------------------------ curve function
822: sub start_function {
823: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
824: my $result='';
825: if ($target eq 'web' || $target eq 'tex') {
826: if (exists($curves[-1]->{'data'})) {
827: &Apache::lonxml::warning
828: ('Use of the <b>curve function</b> tag precludes use of '.
829: ' the <b>curve data</b> tag. '.
830: 'The curve data tag will be omitted in favor of the '.
831: 'curve function declaration.');
832: delete $curves[-1]->{'data'} ;
833: }
834: my $function = &Apache::lonxml::get_all_text("/function",$parser);
835: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
836: $curves[-1]->{'function'} = $function;
837: } elsif ($target eq 'edit') {
838: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
839: my $text = &Apache::lonxml::get_all_text("/function",$parser);
840: $result .= &Apache::edit::end_row().
841: &Apache::edit::start_spanning_row().
842: &Apache::edit::editline('',$text,'',60);
843: } elsif ($target eq 'modified') {
844: $result.=&Apache::edit::rebuild_tag($token);
845: my $text=$$parser[-1]->get_text("/function");
846: $result.=&Apache::edit::modifiedfield($token);
847: }
848: return $result;
849: }
850:
851: sub end_function {
852: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
853: my $result = '';
854: if ($target eq 'web' || $target eq 'tex') {
855: } elsif ($target eq 'edit') {
856: $result .= &Apache::edit::end_table();
857: }
858: return $result;
859: }
860:
861: ##------------------------------------------------------------ curve data
862: sub start_data {
863: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
864: my $result='';
865: if ($target eq 'web' || $target eq 'tex') {
866: if (exists($curves[-1]->{'function'})) {
867: &Apache::lonxml::warning
868: ('Use of the <b>curve function</b> tag precludes use of '.
869: ' the <b>curve data</b> tag. '.
870: 'The curve function tag will be omitted in favor of the '.
871: 'curve data declaration.');
872: delete($curves[-1]->{'function'});
873: }
874: my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
875: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
876: # Deal with cases where we're given an array...
877: if ($datatext =~ /^\@/) {
878: $datatext = &Apache::run::run('return "'.$datatext.'"',
879: $safeeval,1);
880: }
881: $datatext =~ s/\s+/ /g;
882: # Need to do some error checking on the @data array -
883: # make sure it's all numbers and make sure each array
884: # is of the same length.
885: my @data;
886: if ($datatext =~ /,/) { # comma deliminated
887: @data = split /,/,$datatext;
888: } else { # Assume it's space seperated.
889: @data = split / /,$datatext;
890: }
891: for (my $i=0;$i<=$#data;$i++) {
892: # Check that it's non-empty
893: if (! defined($data[$i])) {
894: &Apache::lonxml::warning(
895: 'undefined curve data value. Replacing with '.
896: ' pi/e = 1.15572734979092');
897: $data[$i] = 1.15572734979092;
898: }
899: # Check that it's a number
900: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
901: &Apache::lonxml::warning(
902: 'Bad curve data value of '.$data[$i].' Replacing with '.
903: ' pi/e = 1.15572734979092');
904: $data[$i] = 1.15572734979092;
905: }
906: }
907: # complain if the number of data points is not the same as
908: # in previous sets of data.
909: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
910: &Apache::lonxml::warning
911: ('Number of data points is not consistent with previous '.
912: 'number of data points');
913: }
914: push @{$curves[-1]->{'data'}},\@data;
915: } elsif ($target eq 'edit') {
916: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
917: my $text = &Apache::lonxml::get_all_text("/data",$parser);
918: $result .= &Apache::edit::end_row().
919: &Apache::edit::start_spanning_row().
920: &Apache::edit::editline('',$text,'',60);
921: } elsif ($target eq 'modified') {
922: $result.=&Apache::edit::rebuild_tag($token);
923: my $text=$$parser[-1]->get_text("/data");
924: $result.=&Apache::edit::modifiedfield($token);
925: }
926: return $result;
927: }
928:
929: sub end_data {
930: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
931: my $result = '';
932: if ($target eq 'web' || $target eq 'tex') {
933: } elsif ($target eq 'edit') {
934: $result .= &Apache::edit::end_table();
935: }
936: return $result;
937: }
938:
939: ##------------------------------------------------------------------- axis
940: sub start_axis {
941: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
942: my $result='';
943: if ($target eq 'web' || $target eq 'tex') {
944: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
945: $tagstack->[-1]);
946: } elsif ($target eq 'edit') {
947: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
948: $result .= &edit_attributes($target,$token,\%axis_defaults,
949: \@axis_edit_order);
950: } elsif ($target eq 'modified') {
951: my $constructtag=&Apache::edit::get_new_args
952: ($token,$parstack,$safeeval,keys(%axis_defaults));
953: if ($constructtag) {
954: $result = &Apache::edit::rebuild_tag($token);
955: }
956: }
957: return $result;
958: }
959:
960: sub end_axis {
961: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
962: my $result = '';
963: if ($target eq 'web' || $target eq 'tex') {
964: } elsif ($target eq 'edit') {
965: $result.=&Apache::edit::tag_end($target,$token);
966: } elsif ($target eq 'modified') {
967: }
968: return $result;
969: }
970:
971: ###################################################################
972: ## ##
973: ## Utility Functions ##
974: ## ##
975: ###################################################################
976:
977: ##----------------------------------------------------------- set_defaults
978: sub set_defaults {
979: my ($var,$defaults) = @_;
980: my $key;
981: foreach $key (keys(%$defaults)) {
982: $var->{$key} = $defaults->{$key}->{'default'};
983: }
984: }
985:
986: ##------------------------------------------------------------------- misc
987: sub get_attributes{
988: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
989: foreach my $attr (keys(%{$defaults})) {
990: if ($attr eq 'texwidth') {
991: $values->{$attr} =
992: &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
993: } else {
994: $values->{$attr} =
995: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
996: }
997: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
998: $values->{$attr} = $defaults->{$attr}->{'default'};
999: next;
1000: }
1001: my $test = $defaults->{$attr}->{'test'};
1002: if (! &$test($values->{$attr})) {
1003: &Apache::lonxml::warning
1004: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1005: .$defaults->{$attr}->{'default'} );
1006: $values->{$attr} = $defaults->{$attr}->{'default'};
1007: }
1008: }
1009: return ;
1010: }
1011:
1012: ##------------------------------------------------------- write_gnuplot_file
1013: sub write_gnuplot_file {
1014: my ($tmpdir,$filename,$target)= @_;
1015: my $gnuplot_input = '';
1016: my $curve;
1017: # Collect all the colors
1018: my @Colors;
1019: push @Colors, $plot{'bgcolor'};
1020: push @Colors, $plot{'fgcolor'};
1021: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1022: foreach $curve (@curves) {
1023: push @Colors, ($curve->{'color'} ne '' ?
1024: $curve->{'color'} :
1025: $plot{'fgcolor'} );
1026: }
1027: # set term
1028: if ($target eq 'web') {
1029: $gnuplot_input .= 'set term gif ';
1030: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
1031: $gnuplot_input .= $plot{'font'} . ' ';
1032: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1033: $gnuplot_input .= "@Colors\n";
1034: # set output
1035: $gnuplot_input .= "set output\n";
1036: } elsif ($target eq 'tex') {
1037: $gnuplot_input .= "set term postscript eps monochrome solid \"Helvetica\" 25 \n";
1038: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
1039: &Apache::lonnet::unescape($filename).".eps\"\n";
1040: }
1041: # cartesian or polar?
1042: if (lc($plot{'plottype'}) eq 'polar') {
1043: $gnuplot_input .= 'set polar'.$/;
1044: } else {
1045: # Assume Cartesian
1046: }
1047: # grid
1048: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1049: # border
1050: $gnuplot_input .= ($plot{'border'} eq 'on'?
1051: 'set border'.$/ :
1052: 'set noborder'.$/ );
1053: # sampling rate for non-data curves
1054: $gnuplot_input .= "set samples $plot{'samples'}\n";
1055: # title, xlabel, ylabel
1056: # titles
1057: if ($target eq 'tex') {
1058: $gnuplot_input .= "set title \"$title\" font \"Helvetica,25pt\"\n" if (defined($title)) ;
1059: $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,25pt\" \n" if (defined($xlabel));
1060: $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,25pt\"\n" if (defined($ylabel));
1061: } else {
1062: $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
1063: $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
1064: $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
1065: }
1066: # tics
1067: if (%xtics) {
1068: $gnuplot_input .= "set xtics $xtics{'location'} ";
1069: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1070: $gnuplot_input .= "$xtics{'start'}, ";
1071: $gnuplot_input .= "$xtics{'increment'}, ";
1072: $gnuplot_input .= "$xtics{'end'}\n";
1073: if ($xtics{'minorfreq'} != 0) {
1074: $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
1075: }
1076: }
1077: if (%ytics) {
1078: $gnuplot_input .= "set ytics $ytics{'location'} ";
1079: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1080: $gnuplot_input .= "$ytics{'start'}, ";
1081: $gnuplot_input .= "$ytics{'increment'}, ";
1082: $gnuplot_input .= "$ytics{'end'}\n";
1083: if ($ytics{'minorfreq'} != 0) {
1084: $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
1085: }
1086: }
1087: # axis
1088: if (%axis) {
1089: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1090: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1091: }
1092: # Key
1093: if (%key) {
1094: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1095: if ($key{'title'} ne '') {
1096: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1097: }
1098: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1099: } else {
1100: $gnuplot_input .= 'set nokey'.$/;
1101: }
1102: # labels
1103: my $label;
1104: foreach $label (@labels) {
1105: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1106: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.' font "Helvetica,25pt"'.$/ ;
1107: }
1108: if ($target eq 'tex') {
1109: $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
1110: $gnuplot_input .="\n";
1111: }
1112: # curves
1113: $gnuplot_input .= 'plot ';
1114: for (my $i = 0;$i<=$#curves;$i++) {
1115: $curve = $curves[$i];
1116: $gnuplot_input.= ', ' if ($i > 0);
1117: if (exists($curve->{'function'})) {
1118: $gnuplot_input.=
1119: $curve->{'function'}.' title "'.
1120: $curve->{'name'}.'" with '.
1121: $curve->{'linestyle'};
1122: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1123: if (($curve->{'linestyle'} eq 'points') ||
1124: ($curve->{'linestyle'} eq 'linespoints') ||
1125: ($curve->{'linestyle'} eq 'errorbars') ||
1126: ($curve->{'linestyle'} eq 'xerrorbars') ||
1127: ($curve->{'linestyle'} eq 'yerrorbars') ||
1128: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1129: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1130: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1131: }
1132: } elsif (exists($curve->{'data'})) {
1133: # Store data values in $datatext
1134: my $datatext = '';
1135: # get new filename
1136: my $datafilename = "$tmpdir/$filename.data.$i";
1137: my $fh=Apache::File->new(">$datafilename");
1138: # Compile data
1139: my @Data = @{$curve->{'data'}};
1140: my @Data0 = @{$Data[0]};
1141: for (my $i =0; $i<=$#Data0; $i++) {
1142: my $dataset;
1143: foreach $dataset (@Data) {
1144: $datatext .= $dataset->[$i] . ' ';
1145: }
1146: $datatext .= $/;
1147: }
1148: # write file
1149: print $fh $datatext;
1150: close ($fh);
1151: # generate gnuplot text
1152: $gnuplot_input.= '"'.$datafilename.'" title "'.
1153: $curve->{'name'}.'" with '.
1154: $curve->{'linestyle'};
1155: $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
1156: if (($curve->{'linestyle'} eq 'points') ||
1157: ($curve->{'linestyle'} eq 'linespoints') ||
1158: ($curve->{'linestyle'} eq 'errorbars') ||
1159: ($curve->{'linestyle'} eq 'xerrorbars') ||
1160: ($curve->{'linestyle'} eq 'yerrorbars') ||
1161: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1162: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1163: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1164: }
1165: }
1166: }
1167: # Write the output to a file.
1168: my $fh=Apache::File->new(">$tmpdir$filename.data");
1169: print $fh $gnuplot_input;
1170: close($fh);
1171: # That's all folks.
1172: return ;
1173: }
1174:
1175: #---------------------------------------------- check_inputs
1176: sub check_inputs {
1177: ## Note: no inputs, no outputs - this acts only on global variables.
1178: ## Make sure we have all the input we need:
1179: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1180: if (! %key ) {} # No key for this plot, thats okay
1181: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1182: if (! defined($title )) {} # No title for this plot, thats okay
1183: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1184: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1185: if ($#labels < 0) { } # No labels for this plot, thats okay
1186: if ($#curves < 0) {
1187: &Apache::lonxml::warning("No curves specified for plot!!!!");
1188: return '';
1189: }
1190: my $curve;
1191: foreach $curve (@curves) {
1192: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1193: &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1194: return '';
1195: }
1196: }
1197: }
1198:
1199: #------------------------------------------------ make_edit
1200: sub edit_attributes {
1201: my ($target,$token,$defaults,$keys) = @_;
1202: my ($result,@keys);
1203: if ($keys && ref($keys) eq 'ARRAY') {
1204: @keys = @$keys;
1205: } else {
1206: @keys = sort(keys(%$defaults));
1207: }
1208: foreach my $attr (@keys) {
1209: # append a ' ' to the description if it doesn't have one already.
1210: my $description = $defaults->{$attr}->{'description'};
1211: $description .= ' ' if ($description !~ / $/);
1212: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1213: $result .= &Apache::edit::text_arg
1214: ($description,$attr,$token,
1215: $defaults->{$attr}->{'size'});
1216: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1217: $result .= &Apache::edit::select_arg
1218: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1219: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1220: $result .= &Apache::edit::select_arg
1221: ($description,$attr,['on','off'],$token);
1222: }
1223: $result .= '<br />';
1224: }
1225: return $result;
1226: }
1227:
1228:
1229: ###################################################################
1230: ## ##
1231: ## Insertion functions for editing plots ##
1232: ## ##
1233: ###################################################################
1234:
1235: sub insert_gnuplot {
1236: my $result = '';
1237: # plot attributes
1238: $result .= "\n<gnuplot ";
1239: foreach my $attr (keys(%gnuplot_defaults)) {
1240: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1241: }
1242: $result .= ">";
1243: # Add the components (most are commented out for simplicity)
1244: # $result .= &insert_key();
1245: # $result .= &insert_axis();
1246: # $result .= &insert_title();
1247: # $result .= &insert_xlabel();
1248: # $result .= &insert_ylabel();
1249: $result .= &insert_curve();
1250: # close up the <gnuplot>
1251: $result .= "\n</gnuplot>";
1252: return $result;
1253: }
1254:
1255: sub insert_tics {
1256: my $result;
1257: $result .= &insert_xtics() . &insert_ytics;
1258: return $result;
1259: }
1260:
1261: sub insert_xtics {
1262: my $result;
1263: $result .= "\n <xtics ";
1264: foreach my $attr (keys(%tic_defaults)) {
1265: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1266: }
1267: $result .= "/>";
1268: return $result;
1269: }
1270:
1271: sub insert_ytics {
1272: my $result;
1273: $result .= "\n <ytics ";
1274: foreach my $attr (keys(%tic_defaults)) {
1275: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1276: }
1277: $result .= "/>";
1278: return $result;
1279: }
1280:
1281: sub insert_key {
1282: my $result;
1283: $result .= "\n <key ";
1284: foreach my $attr (keys(%key_defaults)) {
1285: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1286: }
1287: $result .= " />";
1288: return $result;
1289: }
1290:
1291: sub insert_axis{
1292: my $result;
1293: $result .= "\n <axis ";
1294: foreach my $attr (keys(%axis_defaults)) {
1295: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1296: }
1297: $result .= " />";
1298: return $result;
1299: }
1300:
1301: sub insert_title { return "\n <title></title>"; }
1302: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1303: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1304:
1305: sub insert_label {
1306: my $result;
1307: $result .= "\n <label ";
1308: foreach my $attr (keys(%label_defaults)) {
1309: $result .= "\n $attr=\"".
1310: $label_defaults{$attr}->{'default'}."\"";
1311: }
1312: $result .= "></label>";
1313: return $result;
1314: }
1315:
1316: sub insert_curve {
1317: my $result;
1318: $result .= "\n <curve ";
1319: foreach my $attr (keys(%curve_defaults)) {
1320: $result .= "\n $attr=\"".
1321: $curve_defaults{$attr}->{'default'}."\"";
1322: }
1323: $result .= " >";
1324: $result .= &insert_data().&insert_data()."\n </curve>";
1325: }
1326:
1327: sub insert_function {
1328: my $result;
1329: $result .= "\n <function></function>";
1330: return $result;
1331: }
1332:
1333: sub insert_data {
1334: my $result;
1335: $result .= "\n <data></data>";
1336: return $result;
1337: }
1338:
1339: ##----------------------------------------------------------------------
1340: # Javascript functions to display help for tags
1341:
1342: sub make_javascript {
1343: my $helpwindowwidth = 400;
1344: my $helpwindowheight = 400;
1345: my $result = '';
1346: $result.=<<"ENDFUNCTION";
1347: <script language="JavaScript">
1348: function openWin(text)
1349: {
1350: newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
1351: newWin.document.open("text/html", "replace");
1352: newWin.document.writeln(text);
1353: newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
1354: newWin.document.close();
1355: }
1356: </script>
1357: ENDFUNCTION
1358: return $result;
1359: }
1360:
1361: sub help_win {
1362: my ($helptext)=@_;
1363: $helptext =~ s/\n/ /g;
1364: $helptext =~ s/\'/\\\'/g;
1365: my $result = '';
1366: $result.=<<"ENDWIN";
1367: <table width="100%"><tr><td align="right">
1368: <a href="javascript:openWin('$helptext')">help</a>
1369: </td></tr></table><hr />
1370: ENDWIN
1371: return $result;
1372: }
1373: ##----------------------------------------------------------------------
1374: 1;
1375: __END__
1376:
1377:
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