Annotation of loncom/xml/lonplot.pm, revision 1.63
1.1 matthew 1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
1.63 ! albertel 4: # $Id: lonplot.pm,v 1.62 2002/03/22 16:56:37 matthew Exp $
1.1 matthew 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: #
1.3 matthew 28: # 12/15/01 Matthew
1.31 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
1.35 matthew 31: # 01/02 01/03 01/04 01/07 01/08 01/09 Matthew
1.52 matthew 32: # 01/21 02/05 02/06 2/28Matthew
1.35 matthew 33:
1.1 matthew 34: package Apache::lonplot;
1.10 matthew 35:
1.1 matthew 36: use strict;
1.10 matthew 37: use Apache::File;
1.1 matthew 38: use Apache::response;
1.2 matthew 39: use Apache::lonxml;
1.20 matthew 40: use Apache::edit;
1.10 matthew 41:
1.33 harris41 42: BEGIN {
1.47 matthew 43: &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
1.1 matthew 44: }
45:
1.10 matthew 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
1.19 matthew 59: ## align
1.10 matthew 60: ##
61: ## @labels: $labels[$i] = \%label
62: ## %label: text, xpos, ypos, justify
1.14 matthew 63: ##
1.10 matthew 64: ## @curves: $curves[$i] = \%curve
1.14 matthew 65: ## %curve: name, linestyle, ( function | data )
1.10 matthew 66: ##
67: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
68: ## [y1,y2,y3,y4] ]
69: ##
1.21 matthew 70:
71: ###################################################################
72: ## ##
73: ## Tests used in checking the validitity of input ##
74: ## ##
75: ###################################################################
1.29 matthew 76:
1.32 matthew 77: my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
78: # is longer than this, it will be truncated.
79:
1.29 matthew 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,
1.34 matthew 89: errorbars => 3,
90: xerrorbars => [3,4],
91: yerrorbars => [3,4],
1.35 matthew 92: xyerrorbars => [4,6],
1.34 matthew 93: boxes => 3,
1.35 matthew 94: vector => 4
1.29 matthew 95: );
96:
1.11 matthew 97: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
1.19 matthew 98: my $real_test =
99: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
1.62 matthew 100: my $pos_real_test =
101: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
1.11 matthew 102: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-f]{6}$/};
1.1 matthew 103: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
1.15 matthew 104: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
1.1 matthew 105: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
1.29 matthew 106: my $linestyle_test = sub {exists($linestyles{$_[0]})};
1.15 matthew 107: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w\(\)]+ ?)+$/};
1.21 matthew 108:
109: ###################################################################
110: ## ##
111: ## Attribute metadata ##
112: ## ##
113: ###################################################################
1.47 matthew 114: my @gnuplot_edit_order =
1.37 matthew 115: qw/bgcolor fgcolor height width font transparent grid border align/;
1.48 matthew 116:
117: my $gnuplot_help_text = <<"ENDPLOTHELP";
118: <p>
119: The <b>gnuplot</b> tag allows an author to design a plot which can
120: be created on the fly. This is intended for use in homework problems
121: where each student needs to see a distinct plot. It can be used in
122: conjunction with a <b>script</b> tag to generate random plots.
123: </p><p>
124: A <b>gnuplot</b> tag can contain the following sub-tags:
125: </p>
126: <dl>
127: <dt> Plot Label
128: <dd> Allows you to place text at a given (x,y) coordinate on the plot.
129: <dt> Plot Title
130: <dd> The title of the plot
131: <dt> Plot Xlabel
132: <dd> The label on the horizontal axis of the plot
133: <dt> Plot Ylabel
134: <dd> The label on the vertical axis of the plot
135: <dt> Plot Axes
136: <dd> allows specification of the x and y ranges displayed in the plot
137: <dt> Plot Key
138: <dd> Lists the functions displayed in the plot.
139: <dt> Plot Curve
140: <dd> Sets the data used in the plot.
141: <dt> Plot Tics
142: <dd> Allows specification of the x and y coordinate 'tics' on the axes.
143: This is mostly used to adjust the grid lines when a grid is displayed.
144: </dl>
1.55 matthew 145: If you are having trouble with your plot, please read the help
146: available on Plot Curve.
1.48 matthew 147: ENDPLOTHELP
148:
1.47 matthew 149: my %gnuplot_defaults =
1.1 matthew 150: (
1.20 matthew 151: height => {
152: default => 200,
153: test => $int_test,
1.29 matthew 154: description => 'height of image (pixels)',
1.38 matthew 155: edit_type => 'entry',
156: size => '10'
1.20 matthew 157: },
158: width => {
159: default => 200,
160: test => $int_test,
1.29 matthew 161: description => 'width of image (pixels)',
1.38 matthew 162: edit_type => 'entry',
163: size => '10'
1.20 matthew 164: },
165: bgcolor => {
166: default => 'xffffff',
167: test => $color_test,
168: description => 'background color of image (xffffff)',
1.38 matthew 169: edit_type => 'entry',
170: size => '10'
1.20 matthew 171: },
172: fgcolor => {
173: default => 'x000000',
174: test => $color_test,
175: description => 'foreground color of image (x000000)',
1.38 matthew 176: edit_type => 'entry',
177: size => '10'
1.20 matthew 178: },
179: transparent => {
180: default => 'off',
181: test => $onoff_test,
1.34 matthew 182: description => 'Transparent image',
1.45 matthew 183: edit_type => 'onoff'
1.20 matthew 184: },
185: grid => {
186: default => 'off',
187: test => $onoff_test,
1.34 matthew 188: description => 'Display grid',
1.45 matthew 189: edit_type => 'onoff'
1.20 matthew 190: },
191: border => {
192: default => 'on',
193: test => $onoff_test,
1.34 matthew 194: description => 'Draw border around plot',
1.45 matthew 195: edit_type => 'onoff'
1.20 matthew 196: },
197: font => {
198: default => 'medium',
199: test => $sml_test,
200: description => 'Size of font to use',
201: edit_type => 'choice',
202: choices => ['small','medium','large']
203: },
204: align => {
205: default => 'left',
206: test => sub {$_[0]=~/^(left|right|center)$/},
207: description => 'alignment for image in html',
208: edit_type => 'choice',
209: choices => ['left','right','center']
210: }
1.1 matthew 211: );
212:
213: my %key_defaults =
214: (
1.20 matthew 215: title => {
216: default => '',
217: test => $words_test,
218: description => 'Title of key',
1.38 matthew 219: edit_type => 'entry',
220: size => '40'
1.20 matthew 221: },
222: box => {
223: default => 'off',
224: test => $onoff_test,
225: description => 'Draw a box around the key?',
1.45 matthew 226: edit_type => 'onoff'
1.20 matthew 227: },
228: pos => {
229: default => 'top right',
230: test => $key_pos_test,
231: description => 'position of the key on the plot',
232: edit_type => 'choice',
233: choices => ['top left','top right','bottom left','bottom right',
234: 'outside','below']
235: }
1.1 matthew 236: );
237:
238: my %label_defaults =
239: (
1.20 matthew 240: xpos => {
241: default => 0,
242: test => $real_test,
243: description => 'x position of label (graph coordinates)',
1.38 matthew 244: edit_type => 'entry',
245: size => '10'
1.20 matthew 246: },
247: ypos => {
248: default => 0,
249: test => $real_test,
250: description => 'y position of label (graph coordinates)',
1.38 matthew 251: edit_type => 'entry',
252: size => '10'
1.20 matthew 253: },
254: justify => {
255: default => 'left',
256: test => sub {$_[0]=~/^(left|right|center)$/},
257: description => 'justification of the label text on the plot',
258: edit_type => 'choice',
259: choices => ['left','right','center']
260: }
1.1 matthew 261: );
262:
1.45 matthew 263: my @tic_edit_order = ('location','mirror','start','increment','end');
264: my %tic_defaults =
265: (
266: location => {
267: default => 'border',
268: test => sub {$_[0]=~/^(border|axis)$/},
269: description => 'Location of tick marks',
270: edit_type => 'choice',
271: choices => ['border','axis']
272: },
273: mirror => {
274: default => 'on',
275: test => $onoff_test,
276: description => 'mirror ticks on opposite axis?',
277: edit_type => 'onoff'
278: },
279: start => {
280: default => '-10.0',
281: test => $real_test,
282: description => 'Start ticks at',
283: edit_type => 'entry',
284: size => '10'
285: },
286: increment => {
287: default => '1.0',
288: test => $real_test,
289: description => 'Place a tick every',
290: edit_type => 'entry',
291: size => '10'
292: },
293: end => {
294: default => ' 10.0',
295: test => $real_test,
296: description => 'Stop ticks at ',
297: edit_type => 'entry',
298: size => '10'
299: },
300: );
301:
1.1 matthew 302: my %axis_defaults =
303: (
1.28 matthew 304: color => {
1.20 matthew 305: default => 'x000000',
306: test => $color_test,
307: description => 'color of axes (x000000)',
1.38 matthew 308: edit_type => 'entry',
309: size => '10'
1.20 matthew 310: },
311: xmin => {
312: default => '-10.0',
313: test => $real_test,
314: description => 'minimum x-value shown in plot',
1.38 matthew 315: edit_type => 'entry',
316: size => '10'
1.20 matthew 317: },
318: xmax => {
319: default => ' 10.0',
320: test => $real_test,
321: description => 'maximum x-value shown in plot',
1.38 matthew 322: edit_type => 'entry',
323: size => '10'
1.20 matthew 324: },
325: ymin => {
326: default => '-10.0',
327: test => $real_test,
328: description => 'minimum y-value shown in plot',
1.38 matthew 329: edit_type => 'entry',
330: size => '10'
1.20 matthew 331: },
332: ymax => {
333: default => ' 10.0',
334: test => $real_test,
335: description => 'maximum y-value shown in plot',
1.38 matthew 336: edit_type => 'entry',
337: size => '10'
1.20 matthew 338: }
1.1 matthew 339: );
340:
1.48 matthew 341: my $curve_help_text = <<"ENDCURVEHELP";
342: The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
343: There are two ways of entering the information:
344: <dl>
345: <dt> Curve Data
346: <dd> Using a <b>data</b> tag you can specify the numbers used to produce
347: the plot.
348: <p>
349: By default, two <b>data</b> tags will be available in a plot. The
350: first will specify X coordinates of the data and the second will
351: give the Y coordinates of the data. When working with a linestyle that
352: requires more than two data sets, inserting another <b>data</b> tag is
353: required. Unfortunately, you must make sure the <b>data</b> tags appear
354: in the order gnuplot expects the data.
355: </p><p>
356: Specifying the data should usually be done with a perl variable or array,
357: such as \@Xdata and \@Ydata. You may also specify numerical data seperated
358: by commas. Again, the order of the <b>data</b> tags is important. The
359: first tag will be the X data and the second will be the Y data.
360: </p>
361: <dt> Curve Function
362: <dd> The <b>function</b> tag allows you to specify the curve to be
1.57 matthew 363: plotted as a formula that gnuplot can understand. <b>Be careful using this
364: tag.</b> It is surprisingly easy to give gnuplot a function it cannot deal
1.48 matthew 365: with properly. Be explicit: 2*sin(2*3.141592*x/4) will work but
366: 2sin(2*3.141592x/4) will not. If you do not receive any errors in the
367: gnuplot data but still do not have an image produced, it is likely there
368: is an error in your <b>function</b> tag.
369: </dl>
370: ENDCURVEHELP
371:
1.62 matthew 372: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
1.60 matthew 373:
1.1 matthew 374: my %curve_defaults =
375: (
1.20 matthew 376: color => {
377: default => 'x000000',
378: test => $color_test,
379: description => 'color of curve (x000000)',
1.38 matthew 380: edit_type => 'entry',
381: size => '10'
1.20 matthew 382: },
383: name => {
384: default => '',
385: test => $words_test,
386: description => 'name of curve to appear in key',
1.38 matthew 387: edit_type => 'entry',
388: size => '20'
1.20 matthew 389: },
390: linestyle => {
391: default => 'lines',
392: test => $linestyle_test,
1.35 matthew 393: description => 'Line style',
1.20 matthew 394: edit_type => 'choice',
1.38 matthew 395: choices => [keys(%linestyles)]
1.60 matthew 396: },
397: # gnuplots term=gif driver does not handle linewidth :(
398: # linewidth => {
399: # default => 1,
400: # test => $int_test,
401: # description => 'Line width (may not apply to all line styles)',
402: # edit_type => 'choice',
403: # choices => [1,2,3,4,5,6,7,8,9,10]
404: # },
405: pointsize => {
406: default => 1,
1.62 matthew 407: test => $pos_real_test,
408: description => 'point size (may not apply to all line styles)',
409: edit_type => 'entry',
410: size => '5'
411: },
412: pointtype => {
413: default => 1,
1.60 matthew 414: test => $int_test,
1.62 matthew 415: description => 'point type (may not apply to all line styles)',
1.60 matthew 416: edit_type => 'choice',
1.62 matthew 417: choices => [0,1,2,3,4,5,6]
1.60 matthew 418: }
1.1 matthew 419: );
420:
1.21 matthew 421: ###################################################################
422: ## ##
423: ## parsing and edit rendering ##
424: ## ##
425: ###################################################################
1.45 matthew 426: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
1.1 matthew 427:
1.47 matthew 428: sub start_gnuplot {
1.23 matthew 429: %plot = (); %key = (); %axis = ();
1.10 matthew 430: $title = undef; $xlabel = undef; $ylabel = undef;
431: $#labels = -1; $#curves = -1;
1.45 matthew 432: %xtics = (); %ytics = ();
1.6 matthew 433: #
1.1 matthew 434: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
435: my $result='';
1.25 matthew 436: &Apache::lonxml::register('Apache::lonplot',
1.45 matthew 437: ('title','xlabel','ylabel','key','axis','label','curve',
438: 'xtics','ytics'));
1.29 matthew 439: push (@Apache::lonxml::namespace,'lonplot');
1.51 matthew 440: if ($target eq 'web' || $target eq 'tex') {
1.47 matthew 441: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
1.17 matthew 442: $tagstack->[-1]);
1.20 matthew 443: } elsif ($target eq 'edit') {
1.47 matthew 444: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
1.48 matthew 445: $result .= &make_javascript();
446: $result .= &help_win($gnuplot_help_text);
1.47 matthew 447: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
448: \@gnuplot_edit_order);
1.20 matthew 449: } elsif ($target eq 'modified') {
450: my $constructtag=&Apache::edit::get_new_args
1.47 matthew 451: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
1.20 matthew 452: if ($constructtag) {
453: $result = &Apache::edit::rebuild_tag($token);
454: }
1.4 matthew 455: }
1.21 matthew 456: return $result;
1.1 matthew 457: }
458:
1.47 matthew 459: sub end_gnuplot {
1.1 matthew 460: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
461: pop @Apache::lonxml::namespace;
1.4 matthew 462: &Apache::lonxml::deregister('Apache::lonplot',
463: ('title','xlabel','ylabel','key','axis','label','curve'));
464: my $result = '';
1.56 albertel 465: my $randnumber;
466: # need to call rand everytime start_script would evaluate, as the
467: # safe space rand number generator and the global rand generator
468: # are not seperate
469: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
470: $target eq 'answer') {
471: $randnumber=int(rand(1000));
472: }
1.51 matthew 473: if ($target eq 'web' || $target eq 'tex') {
1.21 matthew 474: &check_inputs(); # Make sure we have all the data we need
1.13 matthew 475: ##
476: ## Determine filename
1.4 matthew 477: my $tmpdir = '/home/httpd/perl/tmp/';
1.12 matthew 478: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
1.56 albertel 479: '_'.time.'_'.$$.$randnumber.'_plot.data';
1.4 matthew 480: ## Write the plot description to the file
1.51 matthew 481: &write_gnuplot_file($tmpdir,$filename,$target);
1.54 matthew 482: $filename = &Apache::lonnet::escape($filename);
1.4 matthew 483: ## return image tag for the plot
1.51 matthew 484: if ($target eq 'web') {
485: $result .= <<"ENDIMAGE";
1.53 matthew 486: <img src = "/cgi-bin/plot.gif?file=$filename&output=gif"
1.16 matthew 487: width = "$plot{'width'}"
488: height = "$plot{'height'}"
489: align = "$plot{'align'}"
1.47 matthew 490: alt = "image should be /cgi-bin/plot.gif?$filename" />
1.12 matthew 491: ENDIMAGE
1.51 matthew 492: } elsif ($target eq 'tex') {
1.53 matthew 493: &Apache::lonnet::ssi('cgi-bin/plot.gif?file=$filename'.
494: '&output=eps');
1.51 matthew 495: $result = "$filename.eps";
496: }
1.20 matthew 497: } elsif ($target eq 'edit') {
1.21 matthew 498: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 499: }
1.1 matthew 500: return $result;
501: }
1.2 matthew 502:
1.45 matthew 503:
504: ##--------------------------------------------------------------- xtics
505: sub start_xtics {
506: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
507: my $result='';
1.51 matthew 508: if ($target eq 'web' || $target eq 'tex') {
1.45 matthew 509: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
510: $tagstack->[-1]);
511: } elsif ($target eq 'edit') {
512: $result .= &Apache::edit::tag_start($target,$token,'xtics');
513: $result .= &edit_attributes($target,$token,\%tic_defaults,
514: \@tic_edit_order);
515: } elsif ($target eq 'modified') {
516: my $constructtag=&Apache::edit::get_new_args
517: ($token,$parstack,$safeeval,keys(%tic_defaults));
518: if ($constructtag) {
519: $result = &Apache::edit::rebuild_tag($token);
520: }
521: }
522: return $result;
523: }
524:
525: sub end_xtics {
526: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
527: my $result = '';
1.51 matthew 528: if ($target eq 'web' || $target eq 'tex') {
1.45 matthew 529: } elsif ($target eq 'edit') {
530: $result.=&Apache::edit::tag_end($target,$token);
531: }
532: return $result;
533: }
534:
535: ##--------------------------------------------------------------- ytics
536: sub start_ytics {
537: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
538: my $result='';
1.51 matthew 539: if ($target eq 'web' || $target eq 'tex') {
1.45 matthew 540: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
541: $tagstack->[-1]);
542: } elsif ($target eq 'edit') {
543: $result .= &Apache::edit::tag_start($target,$token,'ytics');
544: $result .= &edit_attributes($target,$token,\%tic_defaults,
545: \@tic_edit_order);
546: } elsif ($target eq 'modified') {
547: my $constructtag=&Apache::edit::get_new_args
548: ($token,$parstack,$safeeval,keys(%tic_defaults));
549: if ($constructtag) {
550: $result = &Apache::edit::rebuild_tag($token);
551: }
552: }
553: return $result;
554: }
555:
556: sub end_ytics {
557: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
558: my $result = '';
1.51 matthew 559: if ($target eq 'web' || $target eq 'tex') {
1.45 matthew 560: } elsif ($target eq 'edit') {
561: $result.=&Apache::edit::tag_end($target,$token);
562: }
563: return $result;
564: }
565:
566:
1.1 matthew 567: ##----------------------------------------------------------------- key
568: sub start_key {
569: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
570: my $result='';
1.51 matthew 571: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 572: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
1.11 matthew 573: $tagstack->[-1]);
1.20 matthew 574: } elsif ($target eq 'edit') {
1.25 matthew 575: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
1.21 matthew 576: $result .= &edit_attributes($target,$token,\%key_defaults);
1.20 matthew 577: } elsif ($target eq 'modified') {
578: my $constructtag=&Apache::edit::get_new_args
1.24 matthew 579: ($token,$parstack,$safeeval,keys(%key_defaults));
1.20 matthew 580: if ($constructtag) {
581: $result = &Apache::edit::rebuild_tag($token);
582: }
1.4 matthew 583: }
1.1 matthew 584: return $result;
585: }
586:
587: sub end_key {
588: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
589: my $result = '';
1.51 matthew 590: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 591: } elsif ($target eq 'edit') {
1.21 matthew 592: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 593: }
1.1 matthew 594: return $result;
595: }
1.21 matthew 596:
1.1 matthew 597: ##------------------------------------------------------------------- title
598: sub start_title {
599: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
600: my $result='';
1.51 matthew 601: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 602: $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
1.58 matthew 603: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1.49 matthew 604: $title =~ s/\n/ /g;
1.32 matthew 605: if (length($title) > $max_str_len) {
606: $title = substr($title,0,$max_str_len);
607: }
1.20 matthew 608: } elsif ($target eq 'edit') {
1.25 matthew 609: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1.22 matthew 610: my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]);
1.39 matthew 611: $result.=&Apache::edit::end_row().
612: &Apache::edit::start_spanning_row().
1.63 ! albertel 613: &Apache::edit::editline('',$text,'',60);
1.20 matthew 614: } elsif ($target eq 'modified') {
1.29 matthew 615: my $text=$$parser[-1]->get_text("/title");
1.42 matthew 616: $result.=&Apache::edit::rebuild_tag($token);
1.21 matthew 617: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 618: }
1.1 matthew 619: return $result;
620: }
621:
622: sub end_title {
623: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
624: my $result = '';
1.51 matthew 625: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 626: } elsif ($target eq 'edit') {
1.27 matthew 627: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 628: }
1.1 matthew 629: return $result;
630: }
631: ##------------------------------------------------------------------- xlabel
632: sub start_xlabel {
633: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
634: my $result='';
1.51 matthew 635: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 636: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
1.58 matthew 637: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1.49 matthew 638: $xlabel =~ s/\n/ /g;
1.32 matthew 639: if (length($xlabel) > $max_str_len) {
640: $xlabel = substr($xlabel,0,$max_str_len);
641: }
1.20 matthew 642: } elsif ($target eq 'edit') {
1.25 matthew 643: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1.22 matthew 644: my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
1.39 matthew 645: $result.=&Apache::edit::end_row().
646: &Apache::edit::start_spanning_row().
1.63 ! albertel 647: &Apache::edit::editline('',$text,'',60);
1.20 matthew 648: } elsif ($target eq 'modified') {
1.29 matthew 649: my $text=$$parser[-1]->get_text("/xlabel");
1.42 matthew 650: $result.=&Apache::edit::rebuild_tag($token);
1.21 matthew 651: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 652: }
1.1 matthew 653: return $result;
654: }
655:
656: sub end_xlabel {
657: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
658: my $result = '';
1.51 matthew 659: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 660: } elsif ($target eq 'edit') {
1.27 matthew 661: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 662: }
1.1 matthew 663: return $result;
664: }
1.21 matthew 665:
1.1 matthew 666: ##------------------------------------------------------------------- ylabel
667: sub start_ylabel {
668: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
669: my $result='';
1.51 matthew 670: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 671: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
1.58 matthew 672: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1.49 matthew 673: $ylabel =~ s/\n/ /g;
1.32 matthew 674: if (length($ylabel) > $max_str_len) {
675: $ylabel = substr($ylabel,0,$max_str_len);
676: }
1.20 matthew 677: } elsif ($target eq 'edit') {
1.25 matthew 678: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1.22 matthew 679: my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
1.39 matthew 680: $result .= &Apache::edit::end_row().
681: &Apache::edit::start_spanning_row().
1.63 ! albertel 682: &Apache::edit::editline('',$text,'',60);
1.20 matthew 683: } elsif ($target eq 'modified') {
1.29 matthew 684: my $text=$$parser[-1]->get_text("/ylabel");
1.42 matthew 685: $result.=&Apache::edit::rebuild_tag($token);
1.21 matthew 686: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 687: }
1.1 matthew 688: return $result;
689: }
690:
691: sub end_ylabel {
692: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
693: my $result = '';
1.51 matthew 694: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 695: } elsif ($target eq 'edit') {
1.27 matthew 696: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 697: }
1.1 matthew 698: return $result;
699: }
1.21 matthew 700:
1.1 matthew 701: ##------------------------------------------------------------------- label
702: sub start_label {
703: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
704: my $result='';
1.51 matthew 705: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 706: my %label;
707: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1.11 matthew 708: $tagstack->[-1]);
1.32 matthew 709: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
1.58 matthew 710: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1.49 matthew 711: $text =~ s/\n/ /g;
1.32 matthew 712: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
713: $label{'text'} = $text;
1.17 matthew 714: push(@labels,\%label);
1.20 matthew 715: } elsif ($target eq 'edit') {
1.25 matthew 716: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1.21 matthew 717: $result .= &edit_attributes($target,$token,\%label_defaults);
1.22 matthew 718: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
1.39 matthew 719: $result .= &Apache::edit::end_row().
720: &Apache::edit::start_spanning_row().
1.63 ! albertel 721: &Apache::edit::editline('',$text,'',60);
1.20 matthew 722: } elsif ($target eq 'modified') {
1.42 matthew 723: &Apache::edit::get_new_args
1.24 matthew 724: ($token,$parstack,$safeeval,keys(%label_defaults));
1.42 matthew 725: $result.=&Apache::edit::rebuild_tag($token);
1.22 matthew 726: my $text=$$parser[-1]->get_text("/label");
1.21 matthew 727: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 728: }
1.1 matthew 729: return $result;
730: }
731:
732: sub end_label {
733: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
734: my $result = '';
1.51 matthew 735: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 736: } elsif ($target eq 'edit') {
1.21 matthew 737: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 738: }
1.1 matthew 739: return $result;
740: }
741:
742: ##------------------------------------------------------------------- curve
743: sub start_curve {
744: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
745: my $result='';
1.25 matthew 746: &Apache::lonxml::register('Apache::lonplot',('function','data'));
747: push (@Apache::lonxml::namespace,'curve');
1.51 matthew 748: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 749: my %curve;
750: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1.11 matthew 751: $tagstack->[-1]);
1.17 matthew 752: push (@curves,\%curve);
1.20 matthew 753: } elsif ($target eq 'edit') {
1.26 matthew 754: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1.48 matthew 755: $result .= &help_win($curve_help_text);
1.60 matthew 756: $result .= &edit_attributes($target,$token,\%curve_defaults,
757: \@curve_edit_order);
1.20 matthew 758: } elsif ($target eq 'modified') {
759: my $constructtag=&Apache::edit::get_new_args
1.35 matthew 760: ($token,$parstack,$safeeval,keys(%curve_defaults));
1.20 matthew 761: if ($constructtag) {
762: $result = &Apache::edit::rebuild_tag($token);
763: $result.= &Apache::edit::handle_insert();
764: }
1.4 matthew 765: }
1.1 matthew 766: return $result;
767: }
768:
769: sub end_curve {
770: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
771: my $result = '';
1.25 matthew 772: pop @Apache::lonxml::namespace;
773: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1.51 matthew 774: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 775: } elsif ($target eq 'edit') {
1.21 matthew 776: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 777: }
1.1 matthew 778: return $result;
779: }
1.21 matthew 780:
1.1 matthew 781: ##------------------------------------------------------------ curve function
782: sub start_function {
783: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
784: my $result='';
1.51 matthew 785: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 786: if (exists($curves[-1]->{'data'})) {
787: &Apache::lonxml::warning('Use of <function> precludes use of <data>. The <data> will be omitted in favor of the <function> declaration.');
788: delete $curves[-1]->{'data'} ;
789: }
1.58 matthew 790: my $function = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
791: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
792: $curves[-1]->{'function'} = $function;
1.20 matthew 793: } elsif ($target eq 'edit') {
1.37 matthew 794: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1.22 matthew 795: my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
1.39 matthew 796: $result .= &Apache::edit::end_row().
797: &Apache::edit::start_spanning_row().
1.63 ! albertel 798: &Apache::edit::editline('',$text,'',60);
1.20 matthew 799: } elsif ($target eq 'modified') {
1.42 matthew 800: $result.=&Apache::edit::rebuild_tag($token);
1.20 matthew 801: my $text=$$parser[-1]->get_text("/function");
802: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 803: }
1.1 matthew 804: return $result;
805: }
806:
807: sub end_function {
808: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
809: my $result = '';
1.51 matthew 810: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 811: } elsif ($target eq 'edit') {
1.26 matthew 812: $result .= &Apache::edit::end_table();
1.4 matthew 813: }
1.1 matthew 814: return $result;
815: }
1.21 matthew 816:
1.1 matthew 817: ##------------------------------------------------------------ curve data
818: sub start_data {
819: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
820: my $result='';
1.51 matthew 821: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 822: if (exists($curves[-1]->{'function'})) {
823: &Apache::lonxml::warning('Use of <data> precludes use of .'.
824: '<function>. The <function> will be omitted in favor of '.
825: 'the <data> declaration.');
826: delete($curves[-1]->{'function'});
827: }
828: my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
1.58 matthew 829: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1.40 matthew 830: # Deal with cases where we're given an array...
831: if ($datatext =~ /^\@/) {
832: $datatext = &Apache::run::run('return "'.$datatext.'"',
833: $safeeval,1);
834: }
1.49 matthew 835: $datatext =~ s/\s+/ /g;
1.17 matthew 836: # Need to do some error checking on the @data array -
837: # make sure it's all numbers and make sure each array
838: # is of the same length.
839: my @data;
1.35 matthew 840: if ($datatext =~ /,/) { # comma deliminated
1.17 matthew 841: @data = split /,/,$datatext;
842: } else { # Assume it's space seperated.
843: @data = split / /,$datatext;
844: }
845: for (my $i=0;$i<=$#data;$i++) {
846: # Check that it's non-empty
1.19 matthew 847: if (! defined($data[$i])) {
848: &Apache::lonxml::warning(
849: 'undefined <data> value. Replacing with '.
850: ' pi/e = 1.15572734979092');
851: $data[$i] = 1.15572734979092;
852: }
1.17 matthew 853: # Check that it's a number
1.19 matthew 854: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
855: &Apache::lonxml::warning(
856: 'Bad <data> value of '.$data[$i].' Replacing with '.
857: ' pi/e = 1.15572734979092');
858: $data[$i] = 1.15572734979092;
859: }
1.17 matthew 860: }
1.35 matthew 861: # complain if the number of data points is not the same as
862: # in previous sets of data.
1.36 matthew 863: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
1.35 matthew 864: &Apache::lonxml::warning
865: ('Number of data points is not consistent with previous '.
866: 'number of data points');
867: }
1.17 matthew 868: push @{$curves[-1]->{'data'}},\@data;
1.20 matthew 869: } elsif ($target eq 'edit') {
1.37 matthew 870: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1.22 matthew 871: my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
1.39 matthew 872: $result .= &Apache::edit::end_row().
873: &Apache::edit::start_spanning_row().
1.63 ! albertel 874: &Apache::edit::editline('',$text,'',60);
1.20 matthew 875: } elsif ($target eq 'modified') {
1.42 matthew 876: $result.=&Apache::edit::rebuild_tag($token);
1.21 matthew 877: my $text=$$parser[-1]->get_text("/data");
878: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 879: }
1.1 matthew 880: return $result;
881: }
882:
883: sub end_data {
884: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
885: my $result = '';
1.51 matthew 886: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 887: } elsif ($target eq 'edit') {
1.26 matthew 888: $result .= &Apache::edit::end_table();
1.4 matthew 889: }
1.1 matthew 890: return $result;
891: }
892:
893: ##------------------------------------------------------------------- axis
894: sub start_axis {
895: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
896: my $result='';
1.51 matthew 897: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 898: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
899: $tagstack->[-1]);
1.20 matthew 900: } elsif ($target eq 'edit') {
1.25 matthew 901: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1.21 matthew 902: $result .= &edit_attributes($target,$token,\%axis_defaults);
1.20 matthew 903: } elsif ($target eq 'modified') {
1.29 matthew 904: my $constructtag=&Apache::edit::get_new_args
905: ($token,$parstack,$safeeval,keys(%axis_defaults));
906: if ($constructtag) {
907: $result = &Apache::edit::rebuild_tag($token);
908: }
1.4 matthew 909: }
1.1 matthew 910: return $result;
911: }
912:
913: sub end_axis {
914: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
915: my $result = '';
1.51 matthew 916: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 917: } elsif ($target eq 'edit') {
1.21 matthew 918: $result.=&Apache::edit::tag_end($target,$token);
1.20 matthew 919: } elsif ($target eq 'modified') {
1.4 matthew 920: }
1.1 matthew 921: return $result;
922: }
923:
1.21 matthew 924: ###################################################################
925: ## ##
926: ## Utility Functions ##
927: ## ##
928: ###################################################################
929:
1.13 matthew 930: ##----------------------------------------------------------- set_defaults
931: sub set_defaults {
1.21 matthew 932: my ($var,$defaults) = @_;
1.13 matthew 933: my $key;
1.24 matthew 934: foreach $key (keys(%$defaults)) {
1.13 matthew 935: $var->{$key} = $defaults->{$key}->{'default'};
936: }
937: }
938:
1.1 matthew 939: ##------------------------------------------------------------------- misc
1.2 matthew 940: sub get_attributes{
1.21 matthew 941: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1.24 matthew 942: foreach my $attr (keys(%{$defaults})) {
1.10 matthew 943: $values->{$attr} =
1.15 matthew 944: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1.10 matthew 945: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1.11 matthew 946: $values->{$attr} = $defaults->{$attr}->{'default'};
1.6 matthew 947: next;
948: }
1.10 matthew 949: my $test = $defaults->{$attr}->{'test'};
950: if (! &$test($values->{$attr})) {
1.6 matthew 951: &Apache::lonxml::warning
952: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1.11 matthew 953: .$defaults->{$attr}->{'default'} );
954: $values->{$attr} = $defaults->{$attr}->{'default'};
1.10 matthew 955: }
1.2 matthew 956: }
1.11 matthew 957: return ;
1.6 matthew 958: }
1.40 matthew 959:
1.15 matthew 960: ##------------------------------------------------------- write_gnuplot_file
1.6 matthew 961: sub write_gnuplot_file {
1.51 matthew 962: my ($tmpdir,$filename,$target)= @_;
1.6 matthew 963: my $gnuplot_input = '';
1.10 matthew 964: my $curve;
1.6 matthew 965: # Collect all the colors
966: my @Colors;
967: push @Colors, $plot{'bgcolor'};
968: push @Colors, $plot{'fgcolor'};
1.13 matthew 969: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1.9 matthew 970: foreach $curve (@curves) {
971: push @Colors, ($curve->{'color'} ne '' ?
972: $curve->{'color'} :
1.13 matthew 973: $plot{'fgcolor'} );
1.6 matthew 974: }
975: # set term
1.51 matthew 976: if ($target eq 'web') {
977: $gnuplot_input .= 'set term gif ';
978: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
979: $gnuplot_input .= $plot{'font'} . ' ';
980: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
981: $gnuplot_input .= "@Colors\n";
982: # set output
983: $gnuplot_input .= "set output\n";
984: } elsif ($target eq 'tex') {
985: $gnuplot_input .= "set term postscript eps monochrome\n";
986: $gnuplot_input .= "set output \"$filename.eps\"\n";
987: }
1.7 matthew 988: # grid
1.10 matthew 989: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1.7 matthew 990: # border
1.9 matthew 991: $gnuplot_input .= ($plot{'border'} eq 'on'?
992: 'set border'.$/ :
993: 'set noborder'.$/ ); # title, xlabel, ylabel
1.45 matthew 994: # titles
1.13 matthew 995: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
996: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
997: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
1.45 matthew 998: # tics
999: if (%xtics) {
1000: $gnuplot_input .= "set xtics $xtics{'location'} ";
1.46 matthew 1001: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45 matthew 1002: $gnuplot_input .= "$xtics{'start'}, ";
1003: $gnuplot_input .= "$xtics{'increment'}, ";
1004: $gnuplot_input .= "$xtics{'end'}\n";
1005: }
1006: if (%ytics) {
1007: $gnuplot_input .= "set ytics $ytics{'location'} ";
1.46 matthew 1008: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45 matthew 1009: $gnuplot_input .= "$ytics{'start'}, ";
1010: $gnuplot_input .= "$ytics{'increment'}, ";
1011: $gnuplot_input .= "$ytics{'end'}\n";
1012: }
1013: # axis
1.23 matthew 1014: if (%axis) {
1.13 matthew 1015: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1016: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1.6 matthew 1017: }
1018: # Key
1.23 matthew 1019: if (%key) {
1.9 matthew 1020: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1021: if ($key{'title'} ne '') {
1.43 matthew 1022: $gnuplot_input .= 'title " '.$key{'title'}.'" ';
1.11 matthew 1023: }
1024: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1.6 matthew 1025: } else {
1.9 matthew 1026: $gnuplot_input .= 'set nokey'.$/;
1.13 matthew 1027: }
1.6 matthew 1028: # labels
1.10 matthew 1029: my $label;
1.6 matthew 1030: foreach $label (@labels) {
1031: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1.9 matthew 1032: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
1.6 matthew 1033: }
1034: # curves
1035: $gnuplot_input .= 'plot ';
1.9 matthew 1036: for (my $i = 0;$i<=$#curves;$i++) {
1037: $curve = $curves[$i];
1038: $gnuplot_input.= ', ' if ($i > 0);
1.6 matthew 1039: if (exists($curve->{'function'})) {
1.9 matthew 1040: $gnuplot_input.=
1041: $curve->{'function'}.' title "'.
1042: $curve->{'name'}.'" with '.
1043: $curve->{'linestyle'};
1.60 matthew 1044: #
1045: # gnuplot's term=gif driver does not handle linewidths :(
1046: # . ' linewidth '. $curve->{'linewidth'};
1047: #
1048: if (($curve->{'linestyle'} eq 'points') ||
1049: ($curve->{'linestyle'} eq 'linespoints') ||
1050: ($curve->{'linestyle'} eq 'errorbars') ||
1051: ($curve->{'linestyle'} eq 'xerrorbars') ||
1052: ($curve->{'linestyle'} eq 'yerrorbars') ||
1053: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1.62 matthew 1054: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1.60 matthew 1055: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1056: }
1.6 matthew 1057: } elsif (exists($curve->{'data'})) {
1.40 matthew 1058: # Store data values in $datatext
1059: my $datatext = '';
1060: # get new filename
1061: my $datafilename = "$tmpdir/$filename.$i";
1062: my $fh=Apache::File->new(">$datafilename");
1063: # Compile data
1.6 matthew 1064: my @Data = @{$curve->{'data'}};
1.9 matthew 1065: my @Data0 = @{$Data[0]};
1066: for (my $i =0; $i<=$#Data0; $i++) {
1.10 matthew 1067: my $dataset;
1.6 matthew 1068: foreach $dataset (@Data) {
1.9 matthew 1069: $datatext .= $dataset->[$i] . ' ';
1.6 matthew 1070: }
1.9 matthew 1071: $datatext .= $/;
1.6 matthew 1072: }
1.40 matthew 1073: # write file
1074: print $fh $datatext;
1075: close ($fh);
1076: # generate gnuplot text
1077: $gnuplot_input.= '"'.$datafilename.'" title "'.
1078: $curve->{'name'}.'" with '.
1079: $curve->{'linestyle'};
1.62 matthew 1080: if (($curve->{'linestyle'} eq 'points') ||
1081: ($curve->{'linestyle'} eq 'linespoints') ||
1082: ($curve->{'linestyle'} eq 'errorbars') ||
1083: ($curve->{'linestyle'} eq 'xerrorbars') ||
1084: ($curve->{'linestyle'} eq 'yerrorbars') ||
1085: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1086: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1087: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1088: }
1.6 matthew 1089: }
1090: }
1.40 matthew 1091: # Write the output to a file.
1092: my $fh=Apache::File->new(">$tmpdir$filename");
1093: print $fh $gnuplot_input;
1094: close($fh);
1095: # That's all folks.
1096: return ;
1.2 matthew 1097: }
1.21 matthew 1098:
1099: #---------------------------------------------- check_inputs
1100: sub check_inputs {
1101: ## Note: no inputs, no outputs - this acts only on global variables.
1102: ## Make sure we have all the input we need:
1.47 matthew 1103: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1.23 matthew 1104: if (! %key ) {} # No key for this plot, thats okay
1.34 matthew 1105: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1.21 matthew 1106: if (! defined($title )) {} # No title for this plot, thats okay
1107: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1108: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1109: if ($#labels < 0) { } # No labels for this plot, thats okay
1110: if ($#curves < 0) {
1111: &Apache::lonxml::warning("No curves specified for plot!!!!");
1112: return '';
1113: }
1114: my $curve;
1115: foreach $curve (@curves) {
1116: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1117: &Apache::lonxml::warning("One of the curves specified did not contain any <data> or <function> declarations\n");
1118: return '';
1119: }
1120: }
1121: }
1122:
1.20 matthew 1123: #------------------------------------------------ make_edit
1124: sub edit_attributes {
1.34 matthew 1125: my ($target,$token,$defaults,$keys) = @_;
1126: my ($result,@keys);
1127: if ($keys && ref($keys) eq 'ARRAY') {
1128: @keys = @$keys;
1129: } else {
1130: @keys = sort(keys(%$defaults));
1131: }
1132: foreach my $attr (@keys) {
1.35 matthew 1133: # append a ' ' to the description if it doesn't have one already.
1134: my $description = $defaults->{$attr}->{'description'};
1135: $description .= ' ' if ($description !~ / $/);
1.20 matthew 1136: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1.35 matthew 1137: $result .= &Apache::edit::text_arg
1.38 matthew 1138: ($description,$attr,$token,
1139: $defaults->{$attr}->{'size'});
1.20 matthew 1140: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1.35 matthew 1141: $result .= &Apache::edit::select_arg
1142: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1.45 matthew 1143: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1.35 matthew 1144: $result .= &Apache::edit::select_arg
1145: ($description,$attr,['on','off'],$token);
1.20 matthew 1146: }
1.25 matthew 1147: $result .= '<br />';
1.20 matthew 1148: }
1149: return $result;
1150: }
1.1 matthew 1151:
1.21 matthew 1152:
1153: ###################################################################
1154: ## ##
1155: ## Insertion functions for editing plots ##
1156: ## ##
1157: ###################################################################
1158:
1.47 matthew 1159: sub insert_gnuplot {
1.29 matthew 1160: my $result = '';
1.20 matthew 1161: # plot attributes
1.61 matthew 1162: $result .= "\n<gnuplot ";
1.47 matthew 1163: foreach my $attr (keys(%gnuplot_defaults)) {
1.61 matthew 1164: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1.20 matthew 1165: }
1.61 matthew 1166: $result .= ">";
1.47 matthew 1167: # Add the components (most are commented out for simplicity)
1.44 matthew 1168: # $result .= &insert_key();
1169: # $result .= &insert_axis();
1170: # $result .= &insert_title();
1171: # $result .= &insert_xlabel();
1172: # $result .= &insert_ylabel();
1.20 matthew 1173: $result .= &insert_curve();
1.50 matthew 1174: # close up the <gnuplot>
1.61 matthew 1175: $result .= "\n</gnuplot>";
1.45 matthew 1176: return $result;
1177: }
1178:
1.46 matthew 1179: sub insert_tics {
1180: my $result;
1181: $result .= &insert_xtics() . &insert_ytics;
1182: return $result;
1183: }
1184:
1.45 matthew 1185: sub insert_xtics {
1186: my $result;
1.46 matthew 1187: $result .= "\n <xtics ";
1.45 matthew 1188: foreach my $attr (keys(%tic_defaults)) {
1.61 matthew 1189: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45 matthew 1190: }
1.61 matthew 1191: $result .= "/>";
1.45 matthew 1192: return $result;
1193: }
1194:
1195: sub insert_ytics {
1196: my $result;
1.46 matthew 1197: $result .= "\n <ytics ";
1.45 matthew 1198: foreach my $attr (keys(%tic_defaults)) {
1.61 matthew 1199: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45 matthew 1200: }
1.61 matthew 1201: $result .= "/>";
1.20 matthew 1202: return $result;
1203: }
1204:
1205: sub insert_key {
1206: my $result;
1.61 matthew 1207: $result .= "\n <key ";
1.30 matthew 1208: foreach my $attr (keys(%key_defaults)) {
1.61 matthew 1209: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1.20 matthew 1210: }
1.61 matthew 1211: $result .= " />";
1.20 matthew 1212: return $result;
1213: }
1214:
1215: sub insert_axis{
1216: my $result;
1.46 matthew 1217: $result .= "\n <axis ";
1.30 matthew 1218: foreach my $attr (keys(%axis_defaults)) {
1.61 matthew 1219: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1.20 matthew 1220: }
1.61 matthew 1221: $result .= " />";
1.20 matthew 1222: return $result;
1223: }
1.28 matthew 1224:
1.61 matthew 1225: sub insert_title { return "\n <title></title>"; }
1226: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1227: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1.20 matthew 1228:
1229: sub insert_label {
1230: my $result;
1.46 matthew 1231: $result .= "\n <label ";
1.30 matthew 1232: foreach my $attr (keys(%label_defaults)) {
1.61 matthew 1233: $result .= "\n $attr=\"".
1234: $label_defaults{$attr}->{'default'}."\"";
1.20 matthew 1235: }
1.61 matthew 1236: $result .= "></label>";
1.20 matthew 1237: return $result;
1238: }
1239:
1240: sub insert_curve {
1241: my $result;
1.41 matthew 1242: $result .= "\n <curve ";
1.30 matthew 1243: foreach my $attr (keys(%curve_defaults)) {
1.61 matthew 1244: $result .= "\n $attr=\"".
1245: $curve_defaults{$attr}->{'default'}."\"";
1.20 matthew 1246: }
1.61 matthew 1247: $result .= " >";
1248: $result .= &insert_data().&insert_data()."\n </curve>";
1.20 matthew 1249: }
1.4 matthew 1250:
1.20 matthew 1251: sub insert_function {
1252: my $result;
1.61 matthew 1253: $result .= "\n <function></function>";
1.20 matthew 1254: return $result;
1255: }
1.4 matthew 1256:
1.20 matthew 1257: sub insert_data {
1258: my $result;
1.61 matthew 1259: $result .= "\n <data></data>";
1.20 matthew 1260: return $result;
1261: }
1.4 matthew 1262:
1.48 matthew 1263: ##----------------------------------------------------------------------
1264: # Javascript functions to display help for tags
1265:
1266: sub make_javascript {
1267: my $helpwindowwidth = 400;
1268: my $helpwindowheight = 400;
1269: my $result = '';
1270: $result.=<<"ENDFUNCTION";
1271: <script language="JavaScript">
1272: function openWin(text)
1273: {
1274: newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
1275: newWin.document.open("text/html", "replace");
1276: newWin.document.writeln(text);
1277: newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
1278: newWin.document.close();
1279: }
1280: </script>
1281: ENDFUNCTION
1282: return $result;
1283: }
1284:
1285: sub help_win {
1286: my ($helptext)=@_;
1287: $helptext =~ s/\n/ /g;
1288: $helptext =~ s/\'/\\\'/g;
1289: my $result = '';
1290: $result.=<<"ENDWIN";
1291: <table width="100%"><tr><td align="right">
1292: <a href="javascript:openWin('$helptext')">help</a>
1293: </td></tr></table><hr />
1294: ENDWIN
1295: return $result;
1296: }
1.21 matthew 1297: ##----------------------------------------------------------------------
1.20 matthew 1298: 1;
1299: __END__
1.4 matthew 1300:
1301:
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