1: # LearningOnline Network with CAPA
2: # option list style responses
3: #
4: # $Id: functionplotresponse.pm,v 1.11 2010/10/09 20:02:02 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::functionplotresponse;
30: use strict;
31: use Apache::response();
32: use Apache::lonlocal;
33: use Apache::lonnet;
34:
35: BEGIN {
36: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline'));
37: }
38:
39: #
40: # There can be a number of applets on a page, each called ggbApplet_$id,
41: # where $id is the "_"-concatenated part and responseid
42: #
43:
44: sub geogebra_startcode {
45: my ($id)=@_;
46: return (<<ENDSTARTCODE);
47: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
48: codebase="/adm/geogebra/" width="714" height="447" MAYSCRIPT>
49: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
50: ENDSTARTCODE
51: }
52:
53: sub geogebra_endcode {
54: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
55: }
56:
57: #
58: # This is the internal GeoGebra bytecode which defines the spline functions
59: #
60: sub geogebra_spline_program {
61: return (<<ENDSPLINEPROGRAM);
62: <param name="ggbBase64" value="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"/>
63: ENDSPLINEPROGRAM
64: }
65:
66: #
67: # The standard set of parameters inside <applet>
68: #
69: sub geogebra_default_parameters {
70: my ($id)=@_;
71: return(<<ENDDEFAULTPARAMETERS);
72: <param name="image" value="/adm/lonIcons/lonanim.gif" />
73: <param name="boxborder" value="false" />
74: <param name="centerimage" value="true" />
75: <param name="java_arguments" value="-Xmx512m" />
76: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_properties.jar" />
77: <param name="cache_version" value="3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0, 3.2.44.0" />
78: <param name="framePossible" value="false" />
79:
80: <param name="showResetIcon" value="false" />
81: <param name="showAnimationButton" value="false" />
82: <param name="enableRightClick" value="false" />
83: <param name="errorDialogsActive" value="true" />
84: <param name="enableLabelDrags" value="false" />
85: <param name="showMenuBar" value="false" />
86: <param name="showToolBar" value="false" />
87: <param name="showToolBarHelp" value="false" />
88: <param name="showAlgebraInput" value="false" />
89: <param name="enableShiftDragZoom" value="false" />
90: <param name="allowRescaling" value="false" />
91: <param name="enableLabelDrags" value="false" />
92: <param name="ggbOnInitParam" value="applet_$id" />
93: ENDDEFAULTPARAMETERS
94: }
95:
96: #
97: # This subroutine is called by LON-CAPA at </problem>
98: # Each applet on the page will call function ggbOnInit when it is done loading
99: # This function in turn will call the respective function registered by start_init_script
100: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
101: #
102:
103: sub init_script {
104: if ($Apache::functionplotresponse::callscripts) {
105: return (<<ENDGGBINIT);
106: <script type="text/javascript">
107: // <![CDATA[
108: function ggbOnInit(param) {
109: $Apache::functionplotresponse::callscripts
110: }
111: // ]]>
112: </script>
113: ENDGGBINIT
114: }
115: }
116:
117: #
118: # Each Geogebra applet is supposed to call this when parameters change
119: # Changes the hidden fields on the web page
120: #
121: sub update_script {
122: my ($id)=@_;
123: return (<<ENDUPDATESCRIPT);
124: <script type="text/javascript">
125: // <![CDATA[
126: function updatePointCoordinates_$id(coordinateName) {
127: var x = document.ggbApplet_$id.getXcoord(coordinateName);
128: var y = document.ggbApplet_$id.getYcoord(coordinateName);
129: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
130: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
131: }
132: // ]]>
133: </script>
134: ENDUPDATESCRIPT
135: }
136:
137: #
138: # Register the above update-handler for a variable
139: #
140:
141: sub update_register {
142: my ($id,$variable)=@_;
143: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
144: }
145:
146: #
147: # Set a coordinate variable
148: #
149: sub set_coordinate {
150: my ($id,$variable,$x,$y)=@_;
151: return (<<ENDSETVARIABLE);
152: document.ggbApplet_$id.evalCommand("$variable=($x,$y)");
153: ENDSETVARIABLE
154: }
155:
156: #
157: # Input field name for a coordinate variable
158: #
159:
160: sub field_name {
161: my ($id,$variable,$name)=@_;
162: return "HWVAL_$id\_$variable\_$name";
163: }
164:
165: #
166: # Generate an input field for a coordinate variable
167: #
168:
169: sub generate_input_field {
170: my ($id,$variable,$x,$y)=@_;
171: $Apache::functionplotresponse::inputfields.=
172: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
173: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
174: }
175:
176: #
177: # Initialize a new coordinate variable at set a listener on it
178: #
179: sub new_coordinate {
180: my ($id,$variable,$x,$y)=@_;
181: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
182: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
183: }
184: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
185: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
186: }
187: &generate_input_field($id,$variable,$x,$y);
188: return &set_coordinate($id,$variable,$x,$y).&update_register($id,$variable);
189: }
190:
191: #
192: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
193: # It then starts the right headers
194: #
195: sub start_init_script {
196: my ($id)=@_;
197: # Add a line to ggbOnInit-function which calls the right function based on parameter passed from GeoGebra
198: $Apache::functionplotresponse::callscripts.="if (param=='applet_$id') { ggbInit_$id(); }\n";
199: # ... and open this function
200: return (<<ENDSTARTINIT);
201: <script type="text/javascript">
202: // <![CDATA[
203: // variable that will eventually be passed back to the server
204: var coordinateMap_$id = [];
205: // Init-function for applet
206: function ggbInit_$id() {
207: ENDSTARTINIT
208: }
209:
210: #
211: # This sets the axes inside ggbInit_$id
212: #
213:
214: sub axes_script {
215: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
216: return (<<ENDAXESSCRIPT);
217: // changes (xmin, xmax, ymin, ymax)
218: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
219:
220: // makes the (x,y) axis (in)visible
221: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
222: // makes the grid (in)visible
223: document.ggbApplet_$id.setGridVisible($gvisible);
224: ENDAXESSCRIPT
225: }
226:
227: sub plot_script {
228: my ($id,$function,$fixed)=@_;
229: if ($fixed) {
230: # Use stupid trick to nail this to a location
231: return (<<ENDPLOTSCRIPT);
232: document.ggbApplet_$id.evalCommand("a=1");
233: document.ggbApplet_$id.setVisible("a",false);
234: // This MUST be a DEPENDENT OBJECT in order to be locked down:
235: document.ggbApplet_$id.evalCommand("y=a*($function)");
236: ENDPLOTSCRIPT
237: } else {
238: return "document.ggbApplet_$id.evalCommand('y=$function')";
239: }
240: }
241:
242: #
243: # Subroutine that generates code for spline $label based on stored information
244: #
245:
246: sub generate_spline {
247: my ($id,$label)=@_;
248: my $result='';
249: my $order=$Apache::functionplotresponse::splineorder{$label};
250: my $x=$Apache::functionplotresponse::splineinitx{$label};
251: my $y=$Apache::functionplotresponse::splineinity{$label};
252: my $sx=$Apache::functionplotresponse::splinescalex{$label};
253: my $sy=$Apache::functionplotresponse::splinescaley{$label};
254: my @coords=();
255: foreach my $i (1..$order) {
256: $result.=&new_coordinate($id,$label.'P'.$i,$x,$y);
257: $x+=$sx/(2.*($order-1));
258: push(@coords,$label.'P'.$i);
259: $result.=&new_coordinate($id,$label.'S'.$i,$x,$y+$sy);
260: $x+=$sx/(2.*($order-1));
261: push(@coords,$label.'S'.$i);
262: }
263: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
264: return $result;
265: }
266: #
267: # <backgroundplot function="..." fixed="yes/no" />
268: #
269: sub start_backgroundplot {
270: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
271: my $result='';
272: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
273: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
274: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
275:
276: unless ($function) { $function="0"; }
277: if ($target eq 'web') {
278: $result.=&plot_script($internalid,$function,$fixed);
279: }
280: return $result;
281: }
282:
283: sub end_backgroundplot {
284: return '';
285: }
286:
287: #
288: # <spline label="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
289: #
290: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
291: #
292: sub start_spline {
293: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
294: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
295: $Apache::functionplotresponse::counter++;
296: $label=~s/\W//gs;
297: unless ($label) { $label='S'.$Apache::functionplotresponse::counter; }
298:
299: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
300: if ($order<2) { $order=2; }
301: if ($order>8) { $order=8; }
302: $Apache::functionplotresponse::splineorder{$label}=$order;
303:
304: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
305: unless ($x) { $x=0; }
306: $Apache::functionplotresponse::splineinitx{$label}=$x;
307:
308: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
309: unless ($y) { $y=0; }
310: $Apache::functionplotresponse::splineinity{$label}=$y;
311:
312: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
313: unless ($sx) { $sx=$order; }
314: $Apache::functionplotresponse::splinescalex{$label}=$sx;
315:
316: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
317: unless ($sy) { $sy=2; }
318: $Apache::functionplotresponse::splinescaley{$label}=$sy;
319: return '';
320: }
321:
322: sub end_spline {
323: return '';
324: }
325:
326: sub end_init_script {
327: return (<<ENDENDINIT);
328: }
329: // ]]>
330: </script>
331: ENDENDINIT
332: }
333:
334: #
335: # Storing and restoring spline coordinates from part answers
336: #
337: sub decode_previous_answer {
338: my ($answer)=@_;
339: foreach my $coordinate (split(/\,/,$answer)) {
340: my ($key,$value)=split(/\=/,$coordinate);
341: $Apache::functionplotresponse::previous{$key}=$value;
342: }
343: }
344:
345: sub get_answer_from_form_fields {
346: my ($id)=@_;
347: my $answer='';
348: my %coords=();
349: foreach my $field (keys(%env)) {
350: if ($field=~/^form\.HWVAL\_$id/) {
351: $field=~/^form\.(.*)$/;
352: $coords{$1}=$env{$field};
353: }
354: }
355: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
356: return ($answer,%coords);
357: }
358:
359: sub start_functionplotresponse {
360: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
361: my $result='';
362: # To remember the splines - somehow, they need to come last
363: undef %Apache::functionplotresponse::splineorder;
364: undef %Apache::functionplotresponse::splineinitx;
365: undef %Apache::functionplotresponse::splineinity;
366: undef %Apache::functionplotresponse::splinescalex;
367: undef %Apache::functionplotresponse::splinescaley;
368: # Remember input fields, etc
369: undef %Apache::functionplotresponse::previous;
370: $Apache::functionplotresponse::inputfields='';
371: $Apache::functionplotresponse::counter=0;
372: # Part and ID
373: my $partid=$Apache::inputtags::part;
374: my $id=&Apache::response::start_response($parstack,$safeeval);
375: # Internal ID to mark the applet and its coordinates
376: my $internalid = $partid.'_'.$id;
377: # Previous answer
378: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
379:
380: # Parameters of <functionplotresponse>
381: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval);
382: $xmin=($xmin?$xmin:-10);
383: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval);
384: $xmax=($xmax?$xmax:10);
385: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval);
386: $ymin=($ymin?$ymin:-10);
387: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval);
388: $ymax=($ymax?$ymax:10);
389: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
390: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
391: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
392:
393: if ($target eq 'meta') {
394: $result=&Apache::response::meta_package_write('functionplotresponse');
395: } elsif ($target eq 'web') {
396: # paste in the update routine to receive stuff back from the applet
397: $result.=&update_script($internalid);
398: # start the initscript for this applet
399: $result.=&start_init_script($internalid);
400: # put the axis commands inside
401: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
402: # init script is left open
403: }
404: return $result;
405: }
406:
407: sub end_functionplotresponse {
408: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
409: &Apache::response::end_response;
410:
411: my $result;
412: my $id=$Apache::inputtags::response[-1];
413: my $partid=$Apache::inputtags::part;
414: my $internalid = $partid.'_'.$id;
415:
416: # if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
417: if ($target eq 'grade'
418: && &Apache::response::submitted()
419: && $Apache::lonhomework::type eq 'exam') {
420:
421: #&Apache::response::scored_response($partid,$id);
422:
423: } elsif ($target eq 'grade'
424: && &Apache::response::submitted()
425: && $Apache::lonhomework::type ne 'exam') {
426: my ($response,%coords)=&get_answer_from_form_fields($internalid);
427: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
428: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}='INCORRECT';
429:
430: } elsif ($target eq 'web') {
431: # Now is the time to render all of the stored splines
432: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
433: $result.=&generate_spline($internalid,$label);
434: }
435: # close the init script
436: $result.=&end_init_script();
437: # generate the input fields
438: $result.=$Apache::functionplotresponse::inputfields;
439: # actually start the <applet>-tag
440: $result.=&geogebra_startcode($internalid);
441: # load the spline bytecode
442: $result.=&geogebra_spline_program();
443: # set default parameters
444: $result.=&geogebra_default_parameters($internalid);
445: # close the <applet>-tag
446: $result.=&geogebra_endcode();
447: }
448: return $result;
449: }
450:
451: 1;
452:
453: __END__
454:
455: =head1 NAME
456:
457: Apache::functionplotresponse.pm;
458:
459: =head1 SYNOPSIS
460:
461: Handles tags associated with accepting function plots.
462:
463: This is part of the LearningOnline Network with CAPA project
464: described at http://www.lon-capa.org.
465:
466: =head1 HANDLER SUBROUTINE
467:
468: start_functionplotresponse()
469:
470: =head1 OTHER SUBROUTINES
471:
472: =over
473:
474: =item end_functionplotresponse()
475:
476: =back
477:
478: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to functionplotresponse.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / homework