Annotation of loncom/xml/lonplot.pm, revision 1.25
1.1 matthew 1: # The LearningOnline Network with CAPA
2: # Dynamic plot
3: #
1.25 ! matthew 4: # $Id: lonplot.pm,v 1.24 2001/12/28 21:09:57 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
1.22 matthew 29: # 12/17 12/18 12/19 12/20 12/21 12/27 12/28 Matthew
1.1 matthew 30: package Apache::lonplot;
1.10 matthew 31:
1.1 matthew 32: use strict;
1.10 matthew 33: use Apache::File;
1.1 matthew 34: use Apache::response;
1.2 matthew 35: use Apache::lonxml;
1.20 matthew 36: use Apache::edit;
1.10 matthew 37:
1.1 matthew 38: sub BEGIN {
39: &Apache::lonxml::register('Apache::lonplot',('plot'));
40: }
41:
1.10 matthew 42: ##
43: ## Description of data structures:
44: ##
45: ## %plot %key %axis
46: ## --------------------------
47: ## height title color
48: ## width box xmin
49: ## bgcolor pos xmax
50: ## fgcolor ymin
51: ## transparent ymax
52: ## grid
53: ## border
54: ## font
1.19 matthew 55: ## align
1.10 matthew 56: ##
57: ## @labels: $labels[$i] = \%label
58: ## %label: text, xpos, ypos, justify
1.14 matthew 59: ##
1.10 matthew 60: ## @curves: $curves[$i] = \%curve
1.14 matthew 61: ## %curve: name, linestyle, ( function | data )
1.10 matthew 62: ##
63: ## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
64: ## [y1,y2,y3,y4] ]
65: ##
1.21 matthew 66:
67: ###################################################################
68: ## ##
69: ## Tests used in checking the validitity of input ##
70: ## ##
71: ###################################################################
1.11 matthew 72: my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
1.19 matthew 73: my $real_test =
74: sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
1.11 matthew 75: my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-f]{6}$/};
1.1 matthew 76: my $onoff_test = sub {$_[0]=~/^(on|off)$/};
1.15 matthew 77: my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
1.1 matthew 78: my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
79: my $linestyle_test = sub {$_[0]=~/^(lines|linespoints|dots|points|steps)$/};
1.15 matthew 80: my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w\(\)]+ ?)+$/};
1.21 matthew 81:
82: ###################################################################
83: ## ##
84: ## Attribute metadata ##
85: ## ##
86: ###################################################################
1.1 matthew 87: my %plot_defaults =
88: (
1.20 matthew 89: height => {
90: default => 200,
91: test => $int_test,
92: description => 'vertical size of image (pixels)',
93: edit_type => 'entry'
94: },
95: width => {
96: default => 200,
97: test => $int_test,
98: description => 'horizontal size of image (pixels)',
99: edit_type => 'entry'
100: },
101: bgcolor => {
102: default => 'xffffff',
103: test => $color_test,
104: description => 'background color of image (xffffff)',
105: edit_type => 'entry'
106: },
107: fgcolor => {
108: default => 'x000000',
109: test => $color_test,
110: description => 'foreground color of image (x000000)',
111: edit_type => 'entry'
112: },
113: transparent => {
114: default => 'off',
115: test => $onoff_test,
116: description => '',
117: edit_type => 'on_off'
118: },
119: grid => {
120: default => 'off',
121: test => $onoff_test,
122: description => '',
123: edit_type => 'on_off'
124: },
125: border => {
126: default => 'on',
127: test => $onoff_test,
128: description => '',
129: edit_type => 'on_off'
130: },
131: font => {
132: default => 'medium',
133: test => $sml_test,
134: description => 'Size of font to use',
135: edit_type => 'choice',
136: choices => ['small','medium','large']
137: },
138: align => {
139: default => 'left',
140: test => sub {$_[0]=~/^(left|right|center)$/},
141: description => 'alignment for image in html',
142: edit_type => 'choice',
143: choices => ['left','right','center']
144: }
1.1 matthew 145: );
146:
147: my %key_defaults =
148: (
1.20 matthew 149: title => {
150: default => '',
151: test => $words_test,
152: description => 'Title of key',
153: edit_type => 'entry'
154: },
155: box => {
156: default => 'off',
157: test => $onoff_test,
158: description => 'Draw a box around the key?',
159: edit_type => 'on_off'
160: },
161: pos => {
162: default => 'top right',
163: test => $key_pos_test,
164: description => 'position of the key on the plot',
165: edit_type => 'choice',
166: choices => ['top left','top right','bottom left','bottom right',
167: 'outside','below']
168: }
1.1 matthew 169: );
170:
171: my %label_defaults =
172: (
1.20 matthew 173: xpos => {
174: default => 0,
175: test => $real_test,
176: description => 'x position of label (graph coordinates)',
177: edit_type => 'entry'
178: },
179: ypos => {
180: default => 0,
181: test => $real_test,
182: description => 'y position of label (graph coordinates)',
183: edit_type => 'entry'
184: },
185: justify => {
186: default => 'left',
187: test => sub {$_[0]=~/^(left|right|center)$/},
188: description => 'justification of the label text on the plot',
189: edit_type => 'choice',
190: choices => ['left','right','center']
191: }
1.1 matthew 192: );
193:
194: my %axis_defaults =
195: (
1.20 matthew 196: color => {
197: default => 'x000000',
198: test => $color_test,
199: description => 'color of axes (x000000)',
200: edit_type => 'entry'
201: },
202: xmin => {
203: default => '-10.0',
204: test => $real_test,
205: description => 'minimum x-value shown in plot',
206: edit_type => 'entry'
207: },
208: xmax => {
209: default => ' 10.0',
210: test => $real_test,
211: description => 'maximum x-value shown in plot',
212: edit_type => 'entry'
213: },
214: ymin => {
215: default => '-10.0',
216: test => $real_test,
217: description => 'minimum y-value shown in plot',
218: edit_type => 'entry'
219: },
220: ymax => {
221: default => ' 10.0',
222: test => $real_test,
223: description => 'maximum y-value shown in plot',
224: edit_type => 'entry'
225: },
226: linestyle => {
227: default => 'points',
228: test => $linestyle_test,
229: description => 'Style of the axis lines',
230: edit_type => 'choice',
231: choices => ['lines','linespoints','dots','points']
232: }
1.1 matthew 233: );
234:
235: my %curve_defaults =
236: (
1.20 matthew 237: color => {
238: default => 'x000000',
239: test => $color_test,
240: description => 'color of curve (x000000)',
241: edit_type => 'entry'
242: },
243: name => {
244: default => '',
245: test => $words_test,
246: description => 'name of curve to appear in key',
247: edit_type => 'entry'
248: },
249: linestyle => {
250: default => 'lines',
251: test => $linestyle_test,
252: description => 'Style of the axis lines',
253: edit_type => 'choice',
254: choices => ['lines','linespoints','dots','points','steps']
255: }
1.1 matthew 256: );
257:
1.21 matthew 258: ###################################################################
259: ## ##
260: ## parsing and edit rendering ##
261: ## ##
262: ###################################################################
1.1 matthew 263: my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves);
264:
265: sub start_plot {
1.23 matthew 266: %plot = (); %key = (); %axis = ();
1.10 matthew 267: $title = undef; $xlabel = undef; $ylabel = undef;
268: $#labels = -1; $#curves = -1;
1.6 matthew 269: #
1.1 matthew 270: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
271: my $result='';
1.25 ! matthew 272: &Apache::lonxml::register('Apache::lonplot',
! 273: ('title','xlabel','ylabel','key','axis','label','curve'));
! 274: push (@Apache::lonxml::namespace,'plot');
! 275: my $inside = &Apache::lonxml::get_all_text("/plot",$$parser[-1]);
1.4 matthew 276: if ($target eq 'web') {
1.17 matthew 277: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
1.25 ! matthew 278: }
! 279: &Apache::lonxml::newparser($parser,\$inside);
! 280: if ($target eq 'web') {
1.17 matthew 281: &get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval,
282: $tagstack->[-1]);
1.20 matthew 283: } elsif ($target eq 'edit') {
1.25 ! matthew 284: $result .= &Apache::edit::tag_start($target,$token,'Plot');
1.21 matthew 285: $result .= &edit_attributes($target,$token,\%plot_defaults);
1.20 matthew 286: } elsif ($target eq 'modified') {
287: my $constructtag=&Apache::edit::get_new_args
1.24 matthew 288: ($token,$parstack,$safeeval,keys(%plot_defaults));
1.20 matthew 289: if ($constructtag) {
290: $result = &Apache::edit::rebuild_tag($token);
291: $result.= &Apache::edit::handle_insert();
292: }
1.4 matthew 293: }
1.21 matthew 294: return $result;
1.1 matthew 295: }
296:
297: sub end_plot {
298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.25 ! matthew 299:
1.1 matthew 300: pop @Apache::lonxml::namespace;
1.4 matthew 301: &Apache::lonxml::deregister('Apache::lonplot',
302: ('title','xlabel','ylabel','key','axis','label','curve'));
303: my $result = '';
304: if ($target eq 'web') {
1.21 matthew 305: &check_inputs(); # Make sure we have all the data we need
1.13 matthew 306: ##
307: ## Determine filename
1.4 matthew 308: my $tmpdir = '/home/httpd/perl/tmp/';
1.12 matthew 309: my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
1.13 matthew 310: '_'.time.'_'.$$.'_plot.data';
1.4 matthew 311: ## Write the plot description to the file
1.12 matthew 312: my $fh=Apache::File->new(">$tmpdir$filename");
313: print $fh &write_gnuplot_file();
1.14 matthew 314: close($fh);
1.4 matthew 315: ## return image tag for the plot
1.12 matthew 316: $result .= <<"ENDIMAGE";
1.16 matthew 317: <img src = "/cgi-bin/plot.gif?$filename"
318: width = "$plot{'width'}"
319: height = "$plot{'height'}"
320: align = "$plot{'align'}"
321: alt = "/cgi-bin/plot.gif?$filename" />
1.12 matthew 322: ENDIMAGE
1.20 matthew 323: } elsif ($target eq 'edit') {
1.21 matthew 324: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 325: }
1.1 matthew 326: return $result;
327: }
1.2 matthew 328:
1.1 matthew 329: ##----------------------------------------------------------------- key
330: sub start_key {
331: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
332: my $result='';
1.17 matthew 333: if ($target eq 'web') {
334: &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
1.11 matthew 335: $tagstack->[-1]);
1.20 matthew 336: } elsif ($target eq 'edit') {
1.25 ! matthew 337: $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
1.21 matthew 338: $result .= &edit_attributes($target,$token,\%key_defaults);
1.20 matthew 339: } elsif ($target eq 'modified') {
340: my $constructtag=&Apache::edit::get_new_args
1.24 matthew 341: ($token,$parstack,$safeeval,keys(%key_defaults));
1.20 matthew 342: if ($constructtag) {
343: $result = &Apache::edit::rebuild_tag($token);
344: $result.= &Apache::edit::handle_insert();
345: }
1.4 matthew 346: }
1.1 matthew 347: return $result;
348: }
349:
350: sub end_key {
351: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
352: my $result = '';
1.4 matthew 353: if ($target eq 'web') {
1.20 matthew 354: } elsif ($target eq 'edit') {
1.21 matthew 355: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 356: }
1.1 matthew 357: return $result;
358: }
1.21 matthew 359:
1.1 matthew 360: ##------------------------------------------------------------------- title
361: sub start_title {
362: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
363: my $result='';
1.4 matthew 364: if ($target eq 'web') {
1.17 matthew 365: $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
1.20 matthew 366: } elsif ($target eq 'edit') {
1.25 ! matthew 367: $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1.22 matthew 368: my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]);
369: $result.='</td></tr><tr><td colspan="3">'.
370: &Apache::edit::editfield('',$text,'',20,1).
371: &Apache::edit::end_table();
1.20 matthew 372: } elsif ($target eq 'modified') {
1.21 matthew 373: my $text=$$parser[-1]->get_text("/function");
374: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 375: }
1.1 matthew 376: return $result;
377: }
378:
379: sub end_title {
380: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
381: my $result = '';
1.4 matthew 382: if ($target eq 'web') {
1.20 matthew 383: } elsif ($target eq 'edit') {
1.4 matthew 384: }
1.1 matthew 385: return $result;
386: }
387: ##------------------------------------------------------------------- xlabel
388: sub start_xlabel {
389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
390: my $result='';
1.4 matthew 391: if ($target eq 'web') {
1.17 matthew 392: $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
1.20 matthew 393: } elsif ($target eq 'edit') {
1.25 ! matthew 394: $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1.22 matthew 395: my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
396: $result.='</td></tr><tr><td colspan="3">'.
397: &Apache::edit::editfield('',$text,'',20,1).
398: &Apache::edit::end_table();
1.20 matthew 399: } elsif ($target eq 'modified') {
1.21 matthew 400: my $text=$$parser[-1]->get_text("/function");
401: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 402: }
1.1 matthew 403: return $result;
404: }
405:
406: sub end_xlabel {
407: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
408: my $result = '';
1.4 matthew 409: if ($target eq 'web') {
1.20 matthew 410: } elsif ($target eq 'edit') {
1.4 matthew 411: }
1.1 matthew 412: return $result;
413: }
1.21 matthew 414:
1.1 matthew 415: ##------------------------------------------------------------------- ylabel
416: sub start_ylabel {
417: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
418: my $result='';
1.4 matthew 419: if ($target eq 'web') {
1.17 matthew 420: $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
1.20 matthew 421: } elsif ($target eq 'edit') {
1.25 ! matthew 422: $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1.22 matthew 423: my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
424: $result .= '</td></tr><tr><td colspan="3">'.
425: &Apache::edit::editfield('',$text,'',20,1).
426: &Apache::edit::end_table();
1.20 matthew 427: } elsif ($target eq 'modified') {
1.21 matthew 428: my $text=$$parser[-1]->get_text("/function");
429: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 430: }
1.1 matthew 431: return $result;
432: }
433:
434: sub end_ylabel {
435: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
436: my $result = '';
1.4 matthew 437: if ($target eq 'web') {
1.20 matthew 438: } elsif ($target eq 'edit') {
1.4 matthew 439: }
1.1 matthew 440: return $result;
441: }
1.21 matthew 442:
1.1 matthew 443: ##------------------------------------------------------------------- label
444: sub start_label {
445: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
446: my $result='';
1.17 matthew 447: if ($target eq 'web') {
448: my %label;
449: &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1.11 matthew 450: $tagstack->[-1]);
1.17 matthew 451: $label{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
452: if (! &$words_test($label{'text'})) {
453: # I should probably warn about it, too.
454: $label{'text'} = 'Illegal text';
455: }
456: push(@labels,\%label);
1.20 matthew 457: } elsif ($target eq 'edit') {
1.25 ! matthew 458: $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1.21 matthew 459: $result .= &edit_attributes($target,$token,\%label_defaults);
1.22 matthew 460: my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
461: $result .= '</td></tr><tr><td colspan="3">'.
462: &Apache::edit::editfield('',$text,'',20,1).
463: &Apache::edit::end_table();
1.20 matthew 464: } elsif ($target eq 'modified') {
465: my $constructtag=&Apache::edit::get_new_args
1.24 matthew 466: ($token,$parstack,$safeeval,keys(%label_defaults));
1.20 matthew 467: if ($constructtag) {
468: $result = &Apache::edit::rebuild_tag($token);
469: $result.= &Apache::edit::handle_insert();
470: }
1.22 matthew 471: my $text=$$parser[-1]->get_text("/label");
1.21 matthew 472: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 473: }
1.1 matthew 474: return $result;
475: }
476:
477: sub end_label {
478: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
479: my $result = '';
1.4 matthew 480: if ($target eq 'web') {
1.20 matthew 481: } elsif ($target eq 'edit') {
1.21 matthew 482: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 483: }
1.1 matthew 484: return $result;
485: }
486:
487: ##------------------------------------------------------------------- curve
488: sub start_curve {
489: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
490: my $result='';
1.25 ! matthew 491: &Apache::lonxml::register('Apache::lonplot',('function','data'));
! 492: push (@Apache::lonxml::namespace,'curve');
1.17 matthew 493: if ($target eq 'web') {
494: my %curve;
495: &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1.11 matthew 496: $tagstack->[-1]);
1.17 matthew 497: push (@curves,\%curve);
1.20 matthew 498: } elsif ($target eq 'edit') {
1.25 ! matthew 499: $result .= &Apache::edit::tag_start($target,$token,'Plot Curve');
1.21 matthew 500: $result .= &edit_attributes($target,$token,\%curve_defaults);
1.20 matthew 501: } elsif ($target eq 'modified') {
502: my $constructtag=&Apache::edit::get_new_args
1.24 matthew 503: ($token,$parstack,$safeeval,keys(%label_defaults));
1.20 matthew 504: if ($constructtag) {
505: $result = &Apache::edit::rebuild_tag($token);
506: $result.= &Apache::edit::handle_insert();
507: }
1.4 matthew 508: }
1.1 matthew 509: return $result;
510: }
511:
512: sub end_curve {
513: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
514: my $result = '';
1.25 ! matthew 515: pop @Apache::lonxml::namespace;
! 516: &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1.4 matthew 517: if ($target eq 'web') {
1.20 matthew 518: } elsif ($target eq 'edit') {
1.21 matthew 519: $result.=&Apache::edit::tag_end($target,$token);
1.4 matthew 520: }
1.1 matthew 521: return $result;
522: }
1.21 matthew 523:
1.1 matthew 524: ##------------------------------------------------------------ curve function
525: sub start_function {
526: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
527: my $result='';
1.4 matthew 528: if ($target eq 'web') {
1.17 matthew 529: if (exists($curves[-1]->{'data'})) {
530: &Apache::lonxml::warning('Use of <function> precludes use of <data>. The <data> will be omitted in favor of the <function> declaration.');
531: delete $curves[-1]->{'data'} ;
532: }
533: $curves[-1]->{'function'} =
534: &Apache::lonxml::get_all_text("/function",$$parser[-1]);
1.20 matthew 535: } elsif ($target eq 'edit') {
1.25 ! matthew 536: $result .= &Apache::edit::tag_start($target,$token,'Curve Function');
1.22 matthew 537: my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
538: $result .= '</td></tr><tr><td colspan="3">'.
1.20 matthew 539: &Apache::edit::editfield('',$text,'',20,1).
540: &Apache::edit::end_table();
1.22 matthew 541:
1.20 matthew 542: } elsif ($target eq 'modified') {
543: # Why do I do this?
544: my $text=$$parser[-1]->get_text("/function");
545: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 546: }
1.1 matthew 547: return $result;
548: }
549:
550: sub end_function {
551: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
552: my $result = '';
1.4 matthew 553: if ($target eq 'web') {
1.20 matthew 554: } elsif ($target eq 'edit') {
1.4 matthew 555: }
1.1 matthew 556: return $result;
557: }
1.21 matthew 558:
1.1 matthew 559: ##------------------------------------------------------------ curve data
560: sub start_data {
561: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
562: my $result='';
1.4 matthew 563: if ($target eq 'web') {
1.17 matthew 564: if (exists($curves[-1]->{'function'})) {
565: &Apache::lonxml::warning('Use of <data> precludes use of .'.
566: '<function>. The <function> will be omitted in favor of '.
567: 'the <data> declaration.');
568: delete($curves[-1]->{'function'});
569: }
570: my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
571: $datatext =~ s/\s+/ /g;
572: # Need to do some error checking on the @data array -
573: # make sure it's all numbers and make sure each array
574: # is of the same length.
575: my @data;
576: if ($datatext =~ /,/) {
577: @data = split /,/,$datatext;
578: } else { # Assume it's space seperated.
579: @data = split / /,$datatext;
580: }
581: for (my $i=0;$i<=$#data;$i++) {
582: # Check that it's non-empty
1.19 matthew 583: if (! defined($data[$i])) {
584: &Apache::lonxml::warning(
585: 'undefined <data> value. Replacing with '.
586: ' pi/e = 1.15572734979092');
587: $data[$i] = 1.15572734979092;
588: }
1.17 matthew 589: # Check that it's a number
1.19 matthew 590: if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
591: &Apache::lonxml::warning(
592: 'Bad <data> value of '.$data[$i].' Replacing with '.
593: ' pi/e = 1.15572734979092');
594: $data[$i] = 1.15572734979092;
595: }
1.17 matthew 596: }
597: push @{$curves[-1]->{'data'}},\@data;
1.20 matthew 598: } elsif ($target eq 'edit') {
1.25 ! matthew 599: $result .= &Apache::edit::tag_start($target,$token,'Curve Data');
1.22 matthew 600: my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
601: $result .= '</td></tr><tr><td colspan="3">'.
602: &Apache::edit::editfield('',$text,'',20,1).
603: &Apache::edit::end_table();
1.20 matthew 604: } elsif ($target eq 'modified') {
1.21 matthew 605: my $text=$$parser[-1]->get_text("/data");
606: $result.=&Apache::edit::modifiedfield($token);
1.4 matthew 607: }
1.1 matthew 608: return $result;
609: }
610:
611: sub end_data {
612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
613: my $result = '';
1.4 matthew 614: if ($target eq 'web') {
1.20 matthew 615: } elsif ($target eq 'edit') {
1.4 matthew 616: }
1.1 matthew 617: return $result;
618: }
619:
620: ##------------------------------------------------------------------- axis
621: sub start_axis {
622: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
623: my $result='';
1.4 matthew 624: if ($target eq 'web') {
1.17 matthew 625: &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
626: $tagstack->[-1]);
1.20 matthew 627: } elsif ($target eq 'edit') {
1.25 ! matthew 628: $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1.21 matthew 629: $result .= &edit_attributes($target,$token,\%axis_defaults);
1.20 matthew 630: } elsif ($target eq 'modified') {
1.4 matthew 631: }
1.1 matthew 632: return $result;
633: }
634:
635: sub end_axis {
636: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
637: my $result = '';
1.4 matthew 638: if ($target eq 'web') {
1.20 matthew 639: } elsif ($target eq 'edit') {
1.21 matthew 640: $result.=&Apache::edit::tag_end($target,$token);
1.20 matthew 641: } elsif ($target eq 'modified') {
642: my $constructtag=&Apache::edit::get_new_args
1.24 matthew 643: ($token,$parstack,$safeeval,keys(%axis_defaults));
1.20 matthew 644: if ($constructtag) {
645: $result = &Apache::edit::rebuild_tag($token);
646: $result.= &Apache::edit::handle_insert();
647: }
1.4 matthew 648: }
1.1 matthew 649: return $result;
650: }
651:
1.21 matthew 652: ###################################################################
653: ## ##
654: ## Utility Functions ##
655: ## ##
656: ###################################################################
657:
1.13 matthew 658: ##----------------------------------------------------------- set_defaults
659: sub set_defaults {
1.21 matthew 660: my ($var,$defaults) = @_;
1.13 matthew 661: my $key;
1.24 matthew 662: foreach $key (keys(%$defaults)) {
1.13 matthew 663: $var->{$key} = $defaults->{$key}->{'default'};
664: }
665: }
666:
1.1 matthew 667: ##------------------------------------------------------------------- misc
1.2 matthew 668: sub get_attributes{
1.21 matthew 669: my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1.24 matthew 670: foreach my $attr (keys(%{$defaults})) {
1.10 matthew 671: $values->{$attr} =
1.15 matthew 672: &Apache::lonxml::get_param($attr,$parstack,$safeeval);
1.10 matthew 673: if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1.11 matthew 674: $values->{$attr} = $defaults->{$attr}->{'default'};
1.6 matthew 675: next;
676: }
1.10 matthew 677: my $test = $defaults->{$attr}->{'test'};
678: if (! &$test($values->{$attr})) {
1.6 matthew 679: &Apache::lonxml::warning
680: ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1.11 matthew 681: .$defaults->{$attr}->{'default'} );
682: $values->{$attr} = $defaults->{$attr}->{'default'};
1.10 matthew 683: }
1.2 matthew 684: }
1.11 matthew 685: return ;
1.6 matthew 686: }
1.15 matthew 687: ##------------------------------------------------------- write_gnuplot_file
1.6 matthew 688: sub write_gnuplot_file {
689: my $gnuplot_input = '';
1.10 matthew 690: my $curve;
1.6 matthew 691: # Collect all the colors
692: my @Colors;
693: push @Colors, $plot{'bgcolor'};
694: push @Colors, $plot{'fgcolor'};
1.13 matthew 695: push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
1.9 matthew 696: foreach $curve (@curves) {
697: push @Colors, ($curve->{'color'} ne '' ?
698: $curve->{'color'} :
1.13 matthew 699: $plot{'fgcolor'} );
1.6 matthew 700: }
701: # set term
702: $gnuplot_input .= 'set term gif ';
703: $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
704: $gnuplot_input .= $plot{'font'} . ' ';
1.10 matthew 705: $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
1.6 matthew 706: $gnuplot_input .= "@Colors\n";
1.7 matthew 707: # grid
1.10 matthew 708: $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
1.7 matthew 709: # border
1.9 matthew 710: $gnuplot_input .= ($plot{'border'} eq 'on'?
711: 'set border'.$/ :
712: 'set noborder'.$/ ); # title, xlabel, ylabel
1.13 matthew 713: $gnuplot_input .= "set output\n";
714: $gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
715: $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
716: $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
1.23 matthew 717: if (%axis) {
1.13 matthew 718: $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
719: $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1.6 matthew 720: }
721: # Key
1.23 matthew 722: if (%key) {
1.9 matthew 723: $gnuplot_input .= 'set key '.$key{'pos'}.' ';
724: if ($key{'title'} ne '') {
1.11 matthew 725: $gnuplot_input .= 'title "'.$key{'title'}.'" ';
726: }
727: $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1.6 matthew 728: } else {
1.9 matthew 729: $gnuplot_input .= 'set nokey'.$/;
1.13 matthew 730: }
1.6 matthew 731: # labels
1.10 matthew 732: my $label;
1.6 matthew 733: foreach $label (@labels) {
734: $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1.9 matthew 735: $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
1.6 matthew 736: }
737: # curves
738: $gnuplot_input .= 'plot ';
739: my $datatext = '';
1.9 matthew 740: for (my $i = 0;$i<=$#curves;$i++) {
741: $curve = $curves[$i];
742: $gnuplot_input.= ', ' if ($i > 0);
1.6 matthew 743: if (exists($curve->{'function'})) {
1.9 matthew 744: $gnuplot_input.=
745: $curve->{'function'}.' title "'.
746: $curve->{'name'}.'" with '.
747: $curve->{'linestyle'};
1.6 matthew 748: } elsif (exists($curve->{'data'})) {
1.9 matthew 749: $gnuplot_input.= '\'-\' title "'.
750: $curve->{'name'}.'" with '.
751: $curve->{'linestyle'};
1.6 matthew 752: my @Data = @{$curve->{'data'}};
1.9 matthew 753: my @Data0 = @{$Data[0]};
754: for (my $i =0; $i<=$#Data0; $i++) {
1.10 matthew 755: my $dataset;
1.6 matthew 756: foreach $dataset (@Data) {
1.9 matthew 757: $datatext .= $dataset->[$i] . ' ';
1.6 matthew 758: }
1.9 matthew 759: $datatext .= $/;
1.6 matthew 760: }
1.9 matthew 761: $datatext .=$/;
1.6 matthew 762: }
763: }
1.9 matthew 764: $gnuplot_input .= $/.$datatext;
1.10 matthew 765: return $gnuplot_input;
1.2 matthew 766: }
1.21 matthew 767:
768: #---------------------------------------------- check_inputs
769: sub check_inputs {
770: ## Note: no inputs, no outputs - this acts only on global variables.
771: ## Make sure we have all the input we need:
1.23 matthew 772: if (! %plot) { &set_defaults(\%plot,\%plot_defaults); }
773: if (! %key ) {} # No key for this plot, thats okay
774: if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1.21 matthew 775: if (! defined($title )) {} # No title for this plot, thats okay
776: if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
777: if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
778: if ($#labels < 0) { } # No labels for this plot, thats okay
779: if ($#curves < 0) {
780: &Apache::lonxml::warning("No curves specified for plot!!!!");
781: return '';
782: }
783: my $curve;
784: foreach $curve (@curves) {
785: if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
786: &Apache::lonxml::warning("One of the curves specified did not contain any <data> or <function> declarations\n");
787: return '';
788: }
789: }
790: }
791:
1.20 matthew 792: #------------------------------------------------ make_edit
793: sub edit_attributes {
1.21 matthew 794: my ($target,$token,$defaults) = @_;
1.20 matthew 795: my $result;
1.25 ! matthew 796: foreach my $attr (sort keys(%$defaults)) {
1.20 matthew 797: if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
798: $result .= &Apache::edit::text_arg(
799: $defaults->{$attr}->{'description'},
800: $attr,
801: $token);
802: } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
803: $result .= &Apache::edit::select_arg(
804: $defaults->{$attr}->{'description'},
805: $attr,
806: $defaults->{$attr}->{'choices'},
807: $token);
808: }
1.25 ! matthew 809: $result .= '<br />';
1.20 matthew 810: }
811: return $result;
812: }
1.1 matthew 813:
1.21 matthew 814:
815: ###################################################################
816: ## ##
817: ## Insertion functions for editing plots ##
818: ## ##
819: ###################################################################
820:
1.20 matthew 821: #------------------------------------------------ insert_xxxxxxx
822: sub insert_plot {
823: my $result;
824: # plot attributes
825: $result .= '<plot ';
826: foreach my $attr (%plot_defaults) {
827: $result .= ' '.$attr.' "'.$plot_defaults{$attr}->{'default'}.
828: "\"\n";
829: }
830: $result .= ">\n";
831: # Add the components
832: $result .= &insert_key();
833: $result .= &insert_axis();
834: $result .= &insert_label();
835: $result .= &insert_curve();
836: $result .= &insert_function();
837: $result .= "</curve>\n";
838: $result .= &insert_curve();
839: $result .= &insert_data();
840: $result .= "</curve>\n";
841: # close up the <plot>
842: $result .= "</plot>\n";
843: return $result;
844: }
845:
846: sub insert_key {
847: my $result;
848: $result .= ' <key ';
849: foreach my $attr (%key_defaults) {
850: $result .= ' '.$attr.' "'.$key_defaults{$attr}->{'default'}.
851: "\"\n";
852: }
853: $result .= " />\n";
854: return $result;
855: }
856:
857: sub insert_axis{
858: my $result;
859: $result .= ' <axis ';
860: foreach my $attr (%axis_defaults) {
861: $result .= ' '.$attr.' "'.$axis_defaults{$attr}->{'default'}.
862: "\"\n";
863: }
864: $result .= " />\n";
865: return $result;
866: }
867:
868: sub insert_label {
869: my $result;
870: $result .= ' <label ';
871: foreach my $attr (%label_defaults) {
872: $result .= ' '.$attr.' "'.
873: $label_defaults{$attr}->{'default'}."\"\n";
874: }
875: $result .= " ></label>\n";
876: return $result;
877: }
878:
879: sub insert_curve {
880: my $result;
881: $result .= ' <curve ';
882: foreach my $attr (%curve_defaults) {
883: $result .= ' '.$attr.' "'.
884: $curve_defaults{$attr}->{'default'}."\"\n";
885: }
886: $result .= " >\n";
887: }
1.4 matthew 888:
1.20 matthew 889: sub insert_function {
890: my $result;
891: $result .= "<function></function>\n";
892: return $result;
893: }
1.4 matthew 894:
1.20 matthew 895: sub insert_data {
896: my $result;
897: $result .= " <data></data>\n";
898: $result .= " <data></data>\n";
899: return $result;
900: }
1.4 matthew 901:
1.21 matthew 902: ##----------------------------------------------------------------------
1.20 matthew 903: 1;
904: __END__
1.4 matthew 905:
906:
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