Annotation of loncom/xml/lonplot.pm, revision 1.70
1.1 matthew 1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
1.69 matthew 4: # $Id: lonplot.pm,v 1.68 2002/04/25 17:23:10 sakharuk 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]})};
1.67 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 =
1.64 matthew 115: qw/alttag 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: (
1.64 matthew 151: alttag => {
152: default => 'dynamically generated plot',
153: test => $words_test,
154: description => 'brief description of the plot',
155: edit_type => 'entry',
156: size => '40'
157: },
1.20 matthew 158: height => {
1.65 matthew 159: default => 300,
1.20 matthew 160: test => $int_test,
1.29 matthew 161: description => 'height of image (pixels)',
1.38 matthew 162: edit_type => 'entry',
163: size => '10'
1.20 matthew 164: },
165: width => {
1.65 matthew 166: default => 400,
1.20 matthew 167: test => $int_test,
1.29 matthew 168: description => 'width of image (pixels)',
1.38 matthew 169: edit_type => 'entry',
170: size => '10'
1.20 matthew 171: },
172: bgcolor => {
173: default => 'xffffff',
174: test => $color_test,
175: description => 'background color of image (xffffff)',
1.38 matthew 176: edit_type => 'entry',
177: size => '10'
1.20 matthew 178: },
179: fgcolor => {
180: default => 'x000000',
181: test => $color_test,
182: description => 'foreground color of image (x000000)',
1.38 matthew 183: edit_type => 'entry',
184: size => '10'
1.20 matthew 185: },
186: transparent => {
187: default => 'off',
188: test => $onoff_test,
1.34 matthew 189: description => 'Transparent image',
1.45 matthew 190: edit_type => 'onoff'
1.20 matthew 191: },
192: grid => {
1.65 matthew 193: default => 'on',
1.20 matthew 194: test => $onoff_test,
1.34 matthew 195: description => 'Display grid',
1.45 matthew 196: edit_type => 'onoff'
1.20 matthew 197: },
198: border => {
199: default => 'on',
200: test => $onoff_test,
1.34 matthew 201: description => 'Draw border around plot',
1.45 matthew 202: edit_type => 'onoff'
1.20 matthew 203: },
204: font => {
205: default => 'medium',
206: test => $sml_test,
207: description => 'Size of font to use',
208: edit_type => 'choice',
209: choices => ['small','medium','large']
210: },
211: align => {
1.65 matthew 212: default => 'center',
1.20 matthew 213: test => sub {$_[0]=~/^(left|right|center)$/},
214: description => 'alignment for image in html',
215: edit_type => 'choice',
216: choices => ['left','right','center']
217: }
1.1 matthew 218: );
219:
220: my %key_defaults =
221: (
1.20 matthew 222: title => {
223: default => '',
224: test => $words_test,
225: description => 'Title of key',
1.38 matthew 226: edit_type => 'entry',
227: size => '40'
1.20 matthew 228: },
229: box => {
230: default => 'off',
231: test => $onoff_test,
232: description => 'Draw a box around the key?',
1.45 matthew 233: edit_type => 'onoff'
1.20 matthew 234: },
235: pos => {
236: default => 'top right',
237: test => $key_pos_test,
238: description => 'position of the key on the plot',
239: edit_type => 'choice',
240: choices => ['top left','top right','bottom left','bottom right',
241: 'outside','below']
242: }
1.1 matthew 243: );
244:
245: my %label_defaults =
246: (
1.20 matthew 247: xpos => {
248: default => 0,
249: test => $real_test,
250: description => 'x position of label (graph coordinates)',
1.38 matthew 251: edit_type => 'entry',
252: size => '10'
1.20 matthew 253: },
254: ypos => {
255: default => 0,
256: test => $real_test,
257: description => 'y position of label (graph coordinates)',
1.38 matthew 258: edit_type => 'entry',
259: size => '10'
1.20 matthew 260: },
261: justify => {
262: default => 'left',
263: test => sub {$_[0]=~/^(left|right|center)$/},
264: description => 'justification of the label text on the plot',
265: edit_type => 'choice',
266: choices => ['left','right','center']
267: }
1.1 matthew 268: );
269:
1.45 matthew 270: my @tic_edit_order = ('location','mirror','start','increment','end');
271: my %tic_defaults =
272: (
273: location => {
274: default => 'border',
275: test => sub {$_[0]=~/^(border|axis)$/},
276: description => 'Location of tick marks',
277: edit_type => 'choice',
278: choices => ['border','axis']
279: },
280: mirror => {
281: default => 'on',
282: test => $onoff_test,
283: description => 'mirror ticks on opposite axis?',
284: edit_type => 'onoff'
285: },
286: start => {
287: default => '-10.0',
288: test => $real_test,
289: description => 'Start ticks at',
290: edit_type => 'entry',
291: size => '10'
292: },
293: increment => {
294: default => '1.0',
295: test => $real_test,
296: description => 'Place a tick every',
297: edit_type => 'entry',
298: size => '10'
299: },
300: end => {
301: default => ' 10.0',
302: test => $real_test,
303: description => 'Stop ticks at ',
304: edit_type => 'entry',
305: size => '10'
306: },
307: );
308:
1.65 matthew 309: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
1.1 matthew 310: my %axis_defaults =
311: (
1.28 matthew 312: color => {
1.20 matthew 313: default => 'x000000',
314: test => $color_test,
315: description => 'color of axes (x000000)',
1.38 matthew 316: edit_type => 'entry',
317: size => '10'
1.20 matthew 318: },
319: xmin => {
320: default => '-10.0',
321: test => $real_test,
322: description => 'minimum x-value shown in plot',
1.38 matthew 323: edit_type => 'entry',
324: size => '10'
1.20 matthew 325: },
326: xmax => {
327: default => ' 10.0',
328: test => $real_test,
329: description => 'maximum x-value shown in plot',
1.38 matthew 330: edit_type => 'entry',
331: size => '10'
1.20 matthew 332: },
333: ymin => {
334: default => '-10.0',
335: test => $real_test,
336: description => 'minimum y-value shown in plot',
1.38 matthew 337: edit_type => 'entry',
338: size => '10'
1.20 matthew 339: },
340: ymax => {
341: default => ' 10.0',
342: test => $real_test,
343: description => 'maximum y-value shown in plot',
1.38 matthew 344: edit_type => 'entry',
345: size => '10'
1.20 matthew 346: }
1.1 matthew 347: );
348:
1.48 matthew 349: my $curve_help_text = <<"ENDCURVEHELP";
350: The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
351: There are two ways of entering the information:
352: <dl>
353: <dt> Curve Data
354: <dd> Using a <b>data</b> tag you can specify the numbers used to produce
355: the plot.
356: <p>
357: By default, two <b>data</b> tags will be available in a plot. The
358: first will specify X coordinates of the data and the second will
359: give the Y coordinates of the data. When working with a linestyle that
360: requires more than two data sets, inserting another <b>data</b> tag is
361: required. Unfortunately, you must make sure the <b>data</b> tags appear
362: in the order gnuplot expects the data.
363: </p><p>
364: Specifying the data should usually be done with a perl variable or array,
365: such as \@Xdata and \@Ydata. You may also specify numerical data seperated
366: by commas. Again, the order of the <b>data</b> tags is important. The
367: first tag will be the X data and the second will be the Y data.
368: </p>
369: <dt> Curve Function
370: <dd> The <b>function</b> tag allows you to specify the curve to be
1.57 matthew 371: plotted as a formula that gnuplot can understand. <b>Be careful using this
372: tag.</b> It is surprisingly easy to give gnuplot a function it cannot deal
1.48 matthew 373: with properly. Be explicit: 2*sin(2*3.141592*x/4) will work but
374: 2sin(2*3.141592x/4) will not. If you do not receive any errors in the
375: gnuplot data but still do not have an image produced, it is likely there
376: is an error in your <b>function</b> tag.
377: </dl>
378: ENDCURVEHELP
379:
1.62 matthew 380: my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
1.60 matthew 381:
1.1 matthew 382: my %curve_defaults =
383: (
1.20 matthew 384: color => {
385: default => 'x000000',
386: test => $color_test,
387: description => 'color of curve (x000000)',
1.38 matthew 388: edit_type => 'entry',
389: size => '10'
1.20 matthew 390: },
391: name => {
392: default => '',
393: test => $words_test,
394: description => 'name of curve to appear in key',
1.38 matthew 395: edit_type => 'entry',
396: size => '20'
1.20 matthew 397: },
398: linestyle => {
399: default => 'lines',
400: test => $linestyle_test,
1.35 matthew 401: description => 'Line style',
1.20 matthew 402: edit_type => 'choice',
1.38 matthew 403: choices => [keys(%linestyles)]
1.60 matthew 404: },
405: # gnuplots term=gif driver does not handle linewidth :(
406: # linewidth => {
407: # default => 1,
408: # test => $int_test,
409: # description => 'Line width (may not apply to all line styles)',
410: # edit_type => 'choice',
411: # choices => [1,2,3,4,5,6,7,8,9,10]
412: # },
413: pointsize => {
414: default => 1,
1.62 matthew 415: test => $pos_real_test,
416: description => 'point size (may not apply to all line styles)',
417: edit_type => 'entry',
418: size => '5'
419: },
420: pointtype => {
421: default => 1,
1.60 matthew 422: test => $int_test,
1.62 matthew 423: description => 'point type (may not apply to all line styles)',
1.60 matthew 424: edit_type => 'choice',
1.62 matthew 425: choices => [0,1,2,3,4,5,6]
1.60 matthew 426: }
1.1 matthew 427: );
428:
1.21 matthew 429: ###################################################################
430: ## ##
431: ## parsing and edit rendering ##
432: ## ##
433: ###################################################################
1.45 matthew 434: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
1.1 matthew 435:
1.47 matthew 436: sub start_gnuplot {
1.23 matthew 437: %plot = (); %key = (); %axis = ();
1.10 matthew 438: $title = undef; $xlabel = undef; $ylabel = undef;
439: $#labels = -1; $#curves = -1;
1.45 matthew 440: %xtics = (); %ytics = ();
1.6 matthew 441: #
1.1 matthew 442: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
443: my $result='';
1.25 matthew 444: &Apache::lonxml::register('Apache::lonplot',
1.45 matthew 445: ('title','xlabel','ylabel','key','axis','label','curve',
446: 'xtics','ytics'));
1.29 matthew 447: push (@Apache::lonxml::namespace,'lonplot');
1.51 matthew 448: if ($target eq 'web' || $target eq 'tex') {
1.47 matthew 449: &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
1.17 matthew 450: $tagstack->[-1]);
1.20 matthew 451: } elsif ($target eq 'edit') {
1.47 matthew 452: $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
1.48 matthew 453: $result .= &make_javascript();
454: $result .= &help_win($gnuplot_help_text);
1.47 matthew 455: $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
456: \@gnuplot_edit_order);
1.20 matthew 457: } elsif ($target eq 'modified') {
458: my $constructtag=&Apache::edit::get_new_args
1.47 matthew 459: ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
1.20 matthew 460: if ($constructtag) {
461: $result = &Apache::edit::rebuild_tag($token);
462: }
1.4 matthew 463: }
1.21 matthew 464: return $result;
1.1 matthew 465: }
466:
1.47 matthew 467: sub end_gnuplot {
1.1 matthew 468: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
469: pop @Apache::lonxml::namespace;
1.4 matthew 470: &Apache::lonxml::deregister('Apache::lonplot',
471: ('title','xlabel','ylabel','key','axis','label','curve'));
472: my $result = '';
1.56 albertel 473: my $randnumber;
474: # need to call rand everytime start_script would evaluate, as the
475: # safe space rand number generator and the global rand generator
476: # are not seperate
477: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
478: $target eq 'answer') {
479: $randnumber=int(rand(1000));
480: }
1.51 matthew 481: if ($target eq 'web' || $target eq 'tex') {
1.21 matthew 482: &check_inputs(); # Make sure we have all the data we need
1.13 matthew 483: ##
484: ## Determine filename
1.4 matthew 485: my $tmpdir = '/home/httpd/perl/tmp/';
1.12 matthew 486: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
1.69 matthew 487: '_'.time.'_'.$$.$randnumber.'_plot';
1.4 matthew 488: ## Write the plot description to the file
1.51 matthew 489: &write_gnuplot_file($tmpdir,$filename,$target);
1.54 matthew 490: $filename = &Apache::lonnet::escape($filename);
1.4 matthew 491: ## return image tag for the plot
1.51 matthew 492: if ($target eq 'web') {
493: $result .= <<"ENDIMAGE";
1.69 matthew 494: <img src = "/cgi-bin/plot.gif?file=$filename.data&output=gif"
1.64 matthew 495: width = "$plot{'width'}"
1.16 matthew 496: height = "$plot{'height'}"
497: align = "$plot{'align'}"
1.64 matthew 498: alt = "$plot{'alttag'}" />
1.12 matthew 499: ENDIMAGE
1.51 matthew 500: } elsif ($target eq 'tex') {
1.70 ! matthew 501: &Apache::lonnet::ssi("/cgi-bin/plot.gif?file=$filename.eps&output=eps");
1.68 sakharuk 502: $result = '\\\\ \graphicspath{/home/httpd/perl/tmp/}\fbox{\includegraphics[width=9.0 cm]{'.&Apache::lonnet::unescape($filename).'.eps}} \\\\';
1.51 matthew 503: }
1.20 matthew 504: } elsif ($target eq 'edit') {
1.21 matthew 505: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 506: }
1.1 matthew 507: return $result;
508: }
1.2 matthew 509:
1.45 matthew 510:
511: ##--------------------------------------------------------------- xtics
512: sub start_xtics {
513: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
514: my $result='';
1.51 matthew 515: if ($target eq 'web' || $target eq 'tex') {
1.45 matthew 516: &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
517: $tagstack->[-1]);
518: } elsif ($target eq 'edit') {
519: $result .= &Apache::edit::tag_start($target,$token,'xtics');
520: $result .= &edit_attributes($target,$token,\%tic_defaults,
521: \@tic_edit_order);
522: } elsif ($target eq 'modified') {
523: my $constructtag=&Apache::edit::get_new_args
524: ($token,$parstack,$safeeval,keys(%tic_defaults));
525: if ($constructtag) {
526: $result = &Apache::edit::rebuild_tag($token);
527: }
528: }
529: return $result;
530: }
531:
532: sub end_xtics {
533: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
534: my $result = '';
1.51 matthew 535: if ($target eq 'web' || $target eq 'tex') {
1.45 matthew 536: } elsif ($target eq 'edit') {
537: $result.=&Apache::edit::tag_end($target,$token);
538: }
539: return $result;
540: }
541:
542: ##--------------------------------------------------------------- ytics
543: sub start_ytics {
544: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
545: my $result='';
1.51 matthew 546: if ($target eq 'web' || $target eq 'tex') {
1.45 matthew 547: &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
548: $tagstack->[-1]);
549: } elsif ($target eq 'edit') {
550: $result .= &Apache::edit::tag_start($target,$token,'ytics');
551: $result .= &edit_attributes($target,$token,\%tic_defaults,
552: \@tic_edit_order);
553: } elsif ($target eq 'modified') {
554: my $constructtag=&Apache::edit::get_new_args
555: ($token,$parstack,$safeeval,keys(%tic_defaults));
556: if ($constructtag) {
557: $result = &Apache::edit::rebuild_tag($token);
558: }
559: }
560: return $result;
561: }
562:
563: sub end_ytics {
564: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
565: my $result = '';
1.51 matthew 566: if ($target eq 'web' || $target eq 'tex') {
1.45 matthew 567: } elsif ($target eq 'edit') {
568: $result.=&Apache::edit::tag_end($target,$token);
569: }
570: return $result;
571: }
572:
573:
1.1 matthew 574: ##----------------------------------------------------------------- key
575: sub start_key {
576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
577: my $result='';
1.51 matthew 578: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 579: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
1.11 matthew 580: $tagstack->[-1]);
1.20 matthew 581: } elsif ($target eq 'edit') {
1.25 matthew 582: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
1.21 matthew 583: $result .= &edit_attributes($target,$token,\%key_defaults);
1.20 matthew 584: } elsif ($target eq 'modified') {
585: my $constructtag=&Apache::edit::get_new_args
1.24 matthew 586: ($token,$parstack,$safeeval,keys(%key_defaults));
1.20 matthew 587: if ($constructtag) {
588: $result = &Apache::edit::rebuild_tag($token);
589: }
1.4 matthew 590: }
1.1 matthew 591: return $result;
592: }
593:
594: sub end_key {
595: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
596: my $result = '';
1.51 matthew 597: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 598: } elsif ($target eq 'edit') {
1.21 matthew 599: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 600: }
1.1 matthew 601: return $result;
602: }
1.21 matthew 603:
1.1 matthew 604: ##------------------------------------------------------------------- title
605: sub start_title {
606: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
607: my $result='';
1.51 matthew 608: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 609: $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
1.58 matthew 610: $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1.49 matthew 611: $title =~ s/\n/ /g;
1.32 matthew 612: if (length($title) > $max_str_len) {
613: $title = substr($title,0,$max_str_len);
614: }
1.20 matthew 615: } elsif ($target eq 'edit') {
1.25 matthew 616: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1.22 matthew 617: my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]);
1.39 matthew 618: $result.=&Apache::edit::end_row().
619: &Apache::edit::start_spanning_row().
1.63 albertel 620: &Apache::edit::editline('',$text,'',60);
1.20 matthew 621: } elsif ($target eq 'modified') {
1.29 matthew 622: my $text=$$parser[-1]->get_text("/title");
1.42 matthew 623: $result.=&Apache::edit::rebuild_tag($token);
1.21 matthew 624: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 625: }
1.1 matthew 626: return $result;
627: }
628:
629: sub end_title {
630: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
631: my $result = '';
1.51 matthew 632: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 633: } elsif ($target eq 'edit') {
1.27 matthew 634: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 635: }
1.1 matthew 636: return $result;
637: }
638: ##------------------------------------------------------------------- xlabel
639: sub start_xlabel {
640: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
641: my $result='';
1.51 matthew 642: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 643: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
1.58 matthew 644: $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1.49 matthew 645: $xlabel =~ s/\n/ /g;
1.32 matthew 646: if (length($xlabel) > $max_str_len) {
647: $xlabel = substr($xlabel,0,$max_str_len);
648: }
1.20 matthew 649: } elsif ($target eq 'edit') {
1.25 matthew 650: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1.22 matthew 651: my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
1.39 matthew 652: $result.=&Apache::edit::end_row().
653: &Apache::edit::start_spanning_row().
1.63 albertel 654: &Apache::edit::editline('',$text,'',60);
1.20 matthew 655: } elsif ($target eq 'modified') {
1.29 matthew 656: my $text=$$parser[-1]->get_text("/xlabel");
1.42 matthew 657: $result.=&Apache::edit::rebuild_tag($token);
1.21 matthew 658: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 659: }
1.1 matthew 660: return $result;
661: }
662:
663: sub end_xlabel {
664: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
665: my $result = '';
1.51 matthew 666: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 667: } elsif ($target eq 'edit') {
1.27 matthew 668: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 669: }
1.1 matthew 670: return $result;
671: }
1.21 matthew 672:
1.1 matthew 673: ##------------------------------------------------------------------- ylabel
674: sub start_ylabel {
675: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
676: my $result='';
1.51 matthew 677: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 678: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
1.58 matthew 679: $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1.49 matthew 680: $ylabel =~ s/\n/ /g;
1.32 matthew 681: if (length($ylabel) > $max_str_len) {
682: $ylabel = substr($ylabel,0,$max_str_len);
683: }
1.20 matthew 684: } elsif ($target eq 'edit') {
1.25 matthew 685: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1.22 matthew 686: my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
1.39 matthew 687: $result .= &Apache::edit::end_row().
688: &Apache::edit::start_spanning_row().
1.63 albertel 689: &Apache::edit::editline('',$text,'',60);
1.20 matthew 690: } elsif ($target eq 'modified') {
1.29 matthew 691: my $text=$$parser[-1]->get_text("/ylabel");
1.42 matthew 692: $result.=&Apache::edit::rebuild_tag($token);
1.21 matthew 693: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 694: }
1.1 matthew 695: return $result;
696: }
697:
698: sub end_ylabel {
699: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
700: my $result = '';
1.51 matthew 701: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 702: } elsif ($target eq 'edit') {
1.27 matthew 703: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 704: }
1.1 matthew 705: return $result;
706: }
1.21 matthew 707:
1.1 matthew 708: ##------------------------------------------------------------------- label
709: sub start_label {
710: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
711: my $result='';
1.51 matthew 712: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 713: my %label;
714: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1.11 matthew 715: $tagstack->[-1]);
1.32 matthew 716: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
1.58 matthew 717: $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1.49 matthew 718: $text =~ s/\n/ /g;
1.32 matthew 719: $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
720: $label{'text'} = $text;
1.17 matthew 721: push(@labels,\%label);
1.20 matthew 722: } elsif ($target eq 'edit') {
1.25 matthew 723: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1.21 matthew 724: $result .= &edit_attributes($target,$token,\%label_defaults);
1.22 matthew 725: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
1.39 matthew 726: $result .= &Apache::edit::end_row().
727: &Apache::edit::start_spanning_row().
1.63 albertel 728: &Apache::edit::editline('',$text,'',60);
1.20 matthew 729: } elsif ($target eq 'modified') {
1.42 matthew 730: &Apache::edit::get_new_args
1.24 matthew 731: ($token,$parstack,$safeeval,keys(%label_defaults));
1.42 matthew 732: $result.=&Apache::edit::rebuild_tag($token);
1.22 matthew 733: my $text=$$parser[-1]->get_text("/label");
1.21 matthew 734: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 735: }
1.1 matthew 736: return $result;
737: }
738:
739: sub end_label {
740: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
741: my $result = '';
1.51 matthew 742: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 743: } elsif ($target eq 'edit') {
1.21 matthew 744: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 745: }
1.1 matthew 746: return $result;
747: }
748:
749: ##------------------------------------------------------------------- curve
750: sub start_curve {
751: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
752: my $result='';
1.25 matthew 753: &Apache::lonxml::register('Apache::lonplot',('function','data'));
754: push (@Apache::lonxml::namespace,'curve');
1.51 matthew 755: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 756: my %curve;
757: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1.11 matthew 758: $tagstack->[-1]);
1.17 matthew 759: push (@curves,\%curve);
1.20 matthew 760: } elsif ($target eq 'edit') {
1.26 matthew 761: $result .= &Apache::edit::tag_start($target,$token,'Curve');
1.48 matthew 762: $result .= &help_win($curve_help_text);
1.60 matthew 763: $result .= &edit_attributes($target,$token,\%curve_defaults,
764: \@curve_edit_order);
1.20 matthew 765: } elsif ($target eq 'modified') {
766: my $constructtag=&Apache::edit::get_new_args
1.35 matthew 767: ($token,$parstack,$safeeval,keys(%curve_defaults));
1.20 matthew 768: if ($constructtag) {
769: $result = &Apache::edit::rebuild_tag($token);
770: $result.= &Apache::edit::handle_insert();
771: }
1.4 matthew 772: }
1.1 matthew 773: return $result;
774: }
775:
776: sub end_curve {
777: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
778: my $result = '';
1.25 matthew 779: pop @Apache::lonxml::namespace;
780: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1.51 matthew 781: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 782: } elsif ($target eq 'edit') {
1.21 matthew 783: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 784: }
1.1 matthew 785: return $result;
786: }
1.21 matthew 787:
1.1 matthew 788: ##------------------------------------------------------------ curve function
789: sub start_function {
790: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
791: my $result='';
1.51 matthew 792: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 793: if (exists($curves[-1]->{'data'})) {
794: &Apache::lonxml::warning('Use of <function> precludes use of <data>. The <data> will be omitted in favor of the <function> declaration.');
795: delete $curves[-1]->{'data'} ;
796: }
1.58 matthew 797: my $function = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
798: $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
799: $curves[-1]->{'function'} = $function;
1.20 matthew 800: } elsif ($target eq 'edit') {
1.37 matthew 801: $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1.22 matthew 802: my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
1.39 matthew 803: $result .= &Apache::edit::end_row().
804: &Apache::edit::start_spanning_row().
1.63 albertel 805: &Apache::edit::editline('',$text,'',60);
1.20 matthew 806: } elsif ($target eq 'modified') {
1.42 matthew 807: $result.=&Apache::edit::rebuild_tag($token);
1.20 matthew 808: my $text=$$parser[-1]->get_text("/function");
809: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 810: }
1.1 matthew 811: return $result;
812: }
813:
814: sub end_function {
815: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
816: my $result = '';
1.51 matthew 817: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 818: } elsif ($target eq 'edit') {
1.26 matthew 819: $result .= &Apache::edit::end_table();
1.4 matthew 820: }
1.1 matthew 821: return $result;
822: }
1.21 matthew 823:
1.1 matthew 824: ##------------------------------------------------------------ curve data
825: sub start_data {
826: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
827: my $result='';
1.51 matthew 828: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 829: if (exists($curves[-1]->{'function'})) {
830: &Apache::lonxml::warning('Use of <data> precludes use of .'.
831: '<function>. The <function> will be omitted in favor of '.
832: 'the <data> declaration.');
833: delete($curves[-1]->{'function'});
834: }
835: my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
1.58 matthew 836: $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1.40 matthew 837: # Deal with cases where we're given an array...
838: if ($datatext =~ /^\@/) {
839: $datatext = &Apache::run::run('return "'.$datatext.'"',
840: $safeeval,1);
841: }
1.49 matthew 842: $datatext =~ s/\s+/ /g;
1.17 matthew 843: # Need to do some error checking on the @data array -
844: # make sure it's all numbers and make sure each array
845: # is of the same length.
846: my @data;
1.35 matthew 847: if ($datatext =~ /,/) { # comma deliminated
1.17 matthew 848: @data = split /,/,$datatext;
849: } else { # Assume it's space seperated.
850: @data = split / /,$datatext;
851: }
852: for (my $i=0;$i<=$#data;$i++) {
853: # Check that it's non-empty
1.19 matthew 854: if (! defined($data[$i])) {
855: &Apache::lonxml::warning(
856: 'undefined <data> value. Replacing with '.
857: ' pi/e = 1.15572734979092');
858: $data[$i] = 1.15572734979092;
859: }
1.17 matthew 860: # Check that it's a number
1.19 matthew 861: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
862: &Apache::lonxml::warning(
863: 'Bad <data> value of '.$data[$i].' Replacing with '.
864: ' pi/e = 1.15572734979092');
865: $data[$i] = 1.15572734979092;
866: }
1.17 matthew 867: }
1.35 matthew 868: # complain if the number of data points is not the same as
869: # in previous sets of data.
1.36 matthew 870: if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
1.35 matthew 871: &Apache::lonxml::warning
872: ('Number of data points is not consistent with previous '.
873: 'number of data points');
874: }
1.17 matthew 875: push @{$curves[-1]->{'data'}},\@data;
1.20 matthew 876: } elsif ($target eq 'edit') {
1.37 matthew 877: $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1.22 matthew 878: my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
1.39 matthew 879: $result .= &Apache::edit::end_row().
880: &Apache::edit::start_spanning_row().
1.63 albertel 881: &Apache::edit::editline('',$text,'',60);
1.20 matthew 882: } elsif ($target eq 'modified') {
1.42 matthew 883: $result.=&Apache::edit::rebuild_tag($token);
1.21 matthew 884: my $text=$$parser[-1]->get_text("/data");
885: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 886: }
1.1 matthew 887: return $result;
888: }
889:
890: sub end_data {
891: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
892: my $result = '';
1.51 matthew 893: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 894: } elsif ($target eq 'edit') {
1.26 matthew 895: $result .= &Apache::edit::end_table();
1.4 matthew 896: }
1.1 matthew 897: return $result;
898: }
899:
900: ##------------------------------------------------------------------- axis
901: sub start_axis {
902: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
903: my $result='';
1.51 matthew 904: if ($target eq 'web' || $target eq 'tex') {
1.17 matthew 905: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
906: $tagstack->[-1]);
1.20 matthew 907: } elsif ($target eq 'edit') {
1.25 matthew 908: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1.65 matthew 909: $result .= &edit_attributes($target,$token,\%axis_defaults,
910: \@axis_edit_order);
1.20 matthew 911: } elsif ($target eq 'modified') {
1.29 matthew 912: my $constructtag=&Apache::edit::get_new_args
913: ($token,$parstack,$safeeval,keys(%axis_defaults));
914: if ($constructtag) {
915: $result = &Apache::edit::rebuild_tag($token);
916: }
1.4 matthew 917: }
1.1 matthew 918: return $result;
919: }
920:
921: sub end_axis {
922: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
923: my $result = '';
1.51 matthew 924: if ($target eq 'web' || $target eq 'tex') {
1.20 matthew 925: } elsif ($target eq 'edit') {
1.21 matthew 926: $result.=&Apache::edit::tag_end($target,$token);
1.20 matthew 927: } elsif ($target eq 'modified') {
1.4 matthew 928: }
1.1 matthew 929: return $result;
930: }
931:
1.21 matthew 932: ###################################################################
933: ## ##
934: ## Utility Functions ##
935: ## ##
936: ###################################################################
937:
1.13 matthew 938: ##----------------------------------------------------------- set_defaults
939: sub set_defaults {
1.21 matthew 940: my ($var,$defaults) = @_;
1.13 matthew 941: my $key;
1.24 matthew 942: foreach $key (keys(%$defaults)) {
1.13 matthew 943: $var->{$key} = $defaults->{$key}->{'default'};
944: }
945: }
946:
1.1 matthew 947: ##------------------------------------------------------------------- misc
1.2 matthew 948: sub get_attributes{
1.21 matthew 949: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1.24 matthew 950: foreach my $attr (keys(%{$defaults})) {
1.10 matthew 951: $values->{$attr} =
1.15 matthew 952: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1.10 matthew 953: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1.11 matthew 954: $values->{$attr} = $defaults->{$attr}->{'default'};
1.6 matthew 955: next;
956: }
1.10 matthew 957: my $test = $defaults->{$attr}->{'test'};
958: if (! &$test($values->{$attr})) {
1.6 matthew 959: &Apache::lonxml::warning
960: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1.11 matthew 961: .$defaults->{$attr}->{'default'} );
962: $values->{$attr} = $defaults->{$attr}->{'default'};
1.10 matthew 963: }
1.2 matthew 964: }
1.11 matthew 965: return ;
1.6 matthew 966: }
1.40 matthew 967:
1.15 matthew 968: ##------------------------------------------------------- write_gnuplot_file
1.6 matthew 969: sub write_gnuplot_file {
1.51 matthew 970: my ($tmpdir,$filename,$target)= @_;
1.6 matthew 971: my $gnuplot_input = '';
1.10 matthew 972: my $curve;
1.6 matthew 973: # Collect all the colors
974: my @Colors;
975: push @Colors, $plot{'bgcolor'};
976: push @Colors, $plot{'fgcolor'};
1.13 matthew 977: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1.9 matthew 978: foreach $curve (@curves) {
979: push @Colors, ($curve->{'color'} ne '' ?
980: $curve->{'color'} :
1.13 matthew 981: $plot{'fgcolor'} );
1.6 matthew 982: }
983: # set term
1.51 matthew 984: if ($target eq 'web') {
985: $gnuplot_input .= 'set term gif ';
986: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
987: $gnuplot_input .= $plot{'font'} . ' ';
988: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
989: $gnuplot_input .= "@Colors\n";
990: # set output
991: $gnuplot_input .= "set output\n";
992: } elsif ($target eq 'tex') {
993: $gnuplot_input .= "set term postscript eps monochrome\n";
1.68 sakharuk 994: $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
995: &Apache::lonnet::unescape($filename).".eps\"\n";
1.51 matthew 996: }
1.7 matthew 997: # grid
1.10 matthew 998: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1.7 matthew 999: # border
1.9 matthew 1000: $gnuplot_input .= ($plot{'border'} eq 'on'?
1001: 'set border'.$/ :
1.67 matthew 1002: 'set noborder'.$/ );
1003: # title, xlabel, ylabel
1.45 matthew 1004: # titles
1.13 matthew 1005: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
1006: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
1007: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
1.45 matthew 1008: # tics
1009: if (%xtics) {
1010: $gnuplot_input .= "set xtics $xtics{'location'} ";
1.46 matthew 1011: $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45 matthew 1012: $gnuplot_input .= "$xtics{'start'}, ";
1013: $gnuplot_input .= "$xtics{'increment'}, ";
1014: $gnuplot_input .= "$xtics{'end'}\n";
1015: }
1016: if (%ytics) {
1017: $gnuplot_input .= "set ytics $ytics{'location'} ";
1.46 matthew 1018: $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45 matthew 1019: $gnuplot_input .= "$ytics{'start'}, ";
1020: $gnuplot_input .= "$ytics{'increment'}, ";
1021: $gnuplot_input .= "$ytics{'end'}\n";
1022: }
1023: # axis
1.23 matthew 1024: if (%axis) {
1.13 matthew 1025: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
1026: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1.6 matthew 1027: }
1028: # Key
1.23 matthew 1029: if (%key) {
1.9 matthew 1030: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
1031: if ($key{'title'} ne '') {
1.67 matthew 1032: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1.11 matthew 1033: }
1034: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1.6 matthew 1035: } else {
1.9 matthew 1036: $gnuplot_input .= 'set nokey'.$/;
1.13 matthew 1037: }
1.6 matthew 1038: # labels
1.10 matthew 1039: my $label;
1.6 matthew 1040: foreach $label (@labels) {
1041: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1.9 matthew 1042: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
1.6 matthew 1043: }
1044: # curves
1045: $gnuplot_input .= 'plot ';
1.9 matthew 1046: for (my $i = 0;$i<=$#curves;$i++) {
1047: $curve = $curves[$i];
1048: $gnuplot_input.= ', ' if ($i > 0);
1.6 matthew 1049: if (exists($curve->{'function'})) {
1.9 matthew 1050: $gnuplot_input.=
1051: $curve->{'function'}.' title "'.
1052: $curve->{'name'}.'" with '.
1053: $curve->{'linestyle'};
1.60 matthew 1054: #
1055: # gnuplot's term=gif driver does not handle linewidths :(
1056: # . ' linewidth '. $curve->{'linewidth'};
1057: #
1058: if (($curve->{'linestyle'} eq 'points') ||
1059: ($curve->{'linestyle'} eq 'linespoints') ||
1060: ($curve->{'linestyle'} eq 'errorbars') ||
1061: ($curve->{'linestyle'} eq 'xerrorbars') ||
1062: ($curve->{'linestyle'} eq 'yerrorbars') ||
1063: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1.62 matthew 1064: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1.60 matthew 1065: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1066: }
1.6 matthew 1067: } elsif (exists($curve->{'data'})) {
1.40 matthew 1068: # Store data values in $datatext
1069: my $datatext = '';
1070: # get new filename
1.70 ! matthew 1071: my $datafilename = "$tmpdir/$filename.data.$i";
1.40 matthew 1072: my $fh=Apache::File->new(">$datafilename");
1073: # Compile data
1.6 matthew 1074: my @Data = @{$curve->{'data'}};
1.9 matthew 1075: my @Data0 = @{$Data[0]};
1076: for (my $i =0; $i<=$#Data0; $i++) {
1.10 matthew 1077: my $dataset;
1.6 matthew 1078: foreach $dataset (@Data) {
1.9 matthew 1079: $datatext .= $dataset->[$i] . ' ';
1.6 matthew 1080: }
1.9 matthew 1081: $datatext .= $/;
1.6 matthew 1082: }
1.40 matthew 1083: # write file
1084: print $fh $datatext;
1085: close ($fh);
1086: # generate gnuplot text
1087: $gnuplot_input.= '"'.$datafilename.'" title "'.
1088: $curve->{'name'}.'" with '.
1089: $curve->{'linestyle'};
1.62 matthew 1090: if (($curve->{'linestyle'} eq 'points') ||
1091: ($curve->{'linestyle'} eq 'linespoints') ||
1092: ($curve->{'linestyle'} eq 'errorbars') ||
1093: ($curve->{'linestyle'} eq 'xerrorbars') ||
1094: ($curve->{'linestyle'} eq 'yerrorbars') ||
1095: ($curve->{'linestyle'} eq 'xyerrorbars')) {
1096: $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1097: $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1098: }
1.6 matthew 1099: }
1100: }
1.40 matthew 1101: # Write the output to a file.
1.70 ! matthew 1102: my $fh=Apache::File->new(">$tmpdir$filename.data");
1.40 matthew 1103: print $fh $gnuplot_input;
1104: close($fh);
1105: # That's all folks.
1106: return ;
1.2 matthew 1107: }
1.21 matthew 1108:
1109: #---------------------------------------------- check_inputs
1110: sub check_inputs {
1111: ## Note: no inputs, no outputs - this acts only on global variables.
1112: ## Make sure we have all the input we need:
1.47 matthew 1113: if (! %plot) { &set_defaults(\%plot,\%gnuplot_defaults); }
1.23 matthew 1114: if (! %key ) {} # No key for this plot, thats okay
1.34 matthew 1115: # if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1.21 matthew 1116: if (! defined($title )) {} # No title for this plot, thats okay
1117: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
1118: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
1119: if ($#labels < 0) { } # No labels for this plot, thats okay
1120: if ($#curves < 0) {
1121: &Apache::lonxml::warning("No curves specified for plot!!!!");
1122: return '';
1123: }
1124: my $curve;
1125: foreach $curve (@curves) {
1126: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1127: &Apache::lonxml::warning("One of the curves specified did not contain any <data> or <function> declarations\n");
1128: return '';
1129: }
1130: }
1131: }
1132:
1.20 matthew 1133: #------------------------------------------------ make_edit
1134: sub edit_attributes {
1.34 matthew 1135: my ($target,$token,$defaults,$keys) = @_;
1136: my ($result,@keys);
1137: if ($keys && ref($keys) eq 'ARRAY') {
1138: @keys = @$keys;
1139: } else {
1140: @keys = sort(keys(%$defaults));
1141: }
1142: foreach my $attr (@keys) {
1.35 matthew 1143: # append a ' ' to the description if it doesn't have one already.
1144: my $description = $defaults->{$attr}->{'description'};
1145: $description .= ' ' if ($description !~ / $/);
1.20 matthew 1146: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1.35 matthew 1147: $result .= &Apache::edit::text_arg
1.38 matthew 1148: ($description,$attr,$token,
1149: $defaults->{$attr}->{'size'});
1.20 matthew 1150: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1.35 matthew 1151: $result .= &Apache::edit::select_arg
1152: ($description,$attr,$defaults->{$attr}->{'choices'},$token);
1.45 matthew 1153: } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1.35 matthew 1154: $result .= &Apache::edit::select_arg
1155: ($description,$attr,['on','off'],$token);
1.20 matthew 1156: }
1.25 matthew 1157: $result .= '<br />';
1.20 matthew 1158: }
1159: return $result;
1160: }
1.1 matthew 1161:
1.21 matthew 1162:
1163: ###################################################################
1164: ## ##
1165: ## Insertion functions for editing plots ##
1166: ## ##
1167: ###################################################################
1168:
1.47 matthew 1169: sub insert_gnuplot {
1.29 matthew 1170: my $result = '';
1.20 matthew 1171: # plot attributes
1.61 matthew 1172: $result .= "\n<gnuplot ";
1.47 matthew 1173: foreach my $attr (keys(%gnuplot_defaults)) {
1.61 matthew 1174: $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1.20 matthew 1175: }
1.61 matthew 1176: $result .= ">";
1.47 matthew 1177: # Add the components (most are commented out for simplicity)
1.44 matthew 1178: # $result .= &insert_key();
1179: # $result .= &insert_axis();
1180: # $result .= &insert_title();
1181: # $result .= &insert_xlabel();
1182: # $result .= &insert_ylabel();
1.20 matthew 1183: $result .= &insert_curve();
1.50 matthew 1184: # close up the <gnuplot>
1.61 matthew 1185: $result .= "\n</gnuplot>";
1.45 matthew 1186: return $result;
1187: }
1188:
1.46 matthew 1189: sub insert_tics {
1190: my $result;
1191: $result .= &insert_xtics() . &insert_ytics;
1192: return $result;
1193: }
1194:
1.45 matthew 1195: sub insert_xtics {
1196: my $result;
1.46 matthew 1197: $result .= "\n <xtics ";
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 .= "/>";
1.45 matthew 1202: return $result;
1203: }
1204:
1205: sub insert_ytics {
1206: my $result;
1.46 matthew 1207: $result .= "\n <ytics ";
1.45 matthew 1208: foreach my $attr (keys(%tic_defaults)) {
1.61 matthew 1209: $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45 matthew 1210: }
1.61 matthew 1211: $result .= "/>";
1.20 matthew 1212: return $result;
1213: }
1214:
1215: sub insert_key {
1216: my $result;
1.61 matthew 1217: $result .= "\n <key ";
1.30 matthew 1218: foreach my $attr (keys(%key_defaults)) {
1.61 matthew 1219: $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
1.20 matthew 1220: }
1.61 matthew 1221: $result .= " />";
1.20 matthew 1222: return $result;
1223: }
1224:
1225: sub insert_axis{
1226: my $result;
1.46 matthew 1227: $result .= "\n <axis ";
1.30 matthew 1228: foreach my $attr (keys(%axis_defaults)) {
1.61 matthew 1229: $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
1.20 matthew 1230: }
1.61 matthew 1231: $result .= " />";
1.20 matthew 1232: return $result;
1233: }
1.28 matthew 1234:
1.61 matthew 1235: sub insert_title { return "\n <title></title>"; }
1236: sub insert_xlabel { return "\n <xlabel></xlabel>"; }
1237: sub insert_ylabel { return "\n <ylabel></ylabel>"; }
1.20 matthew 1238:
1239: sub insert_label {
1240: my $result;
1.46 matthew 1241: $result .= "\n <label ";
1.30 matthew 1242: foreach my $attr (keys(%label_defaults)) {
1.61 matthew 1243: $result .= "\n $attr=\"".
1244: $label_defaults{$attr}->{'default'}."\"";
1.20 matthew 1245: }
1.61 matthew 1246: $result .= "></label>";
1.20 matthew 1247: return $result;
1248: }
1249:
1250: sub insert_curve {
1251: my $result;
1.41 matthew 1252: $result .= "\n <curve ";
1.30 matthew 1253: foreach my $attr (keys(%curve_defaults)) {
1.61 matthew 1254: $result .= "\n $attr=\"".
1255: $curve_defaults{$attr}->{'default'}."\"";
1.20 matthew 1256: }
1.61 matthew 1257: $result .= " >";
1258: $result .= &insert_data().&insert_data()."\n </curve>";
1.20 matthew 1259: }
1.4 matthew 1260:
1.20 matthew 1261: sub insert_function {
1262: my $result;
1.61 matthew 1263: $result .= "\n <function></function>";
1.20 matthew 1264: return $result;
1265: }
1.4 matthew 1266:
1.20 matthew 1267: sub insert_data {
1268: my $result;
1.61 matthew 1269: $result .= "\n <data></data>";
1.20 matthew 1270: return $result;
1271: }
1.4 matthew 1272:
1.48 matthew 1273: ##----------------------------------------------------------------------
1274: # Javascript functions to display help for tags
1275:
1276: sub make_javascript {
1277: my $helpwindowwidth = 400;
1278: my $helpwindowheight = 400;
1279: my $result = '';
1280: $result.=<<"ENDFUNCTION";
1281: <script language="JavaScript">
1282: function openWin(text)
1283: {
1284: newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
1285: newWin.document.open("text/html", "replace");
1286: newWin.document.writeln(text);
1287: newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
1288: newWin.document.close();
1289: }
1290: </script>
1291: ENDFUNCTION
1292: return $result;
1293: }
1294:
1295: sub help_win {
1296: my ($helptext)=@_;
1297: $helptext =~ s/\n/ /g;
1298: $helptext =~ s/\'/\\\'/g;
1299: my $result = '';
1300: $result.=<<"ENDWIN";
1301: <table width="100%"><tr><td align="right">
1302: <a href="javascript:openWin('$helptext')">help</a>
1303: </td></tr></table><hr />
1304: ENDWIN
1305: return $result;
1306: }
1.21 matthew 1307: ##----------------------------------------------------------------------
1.20 matthew 1308: 1;
1309: __END__
1.4 matthew 1310:
1311:
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