loncom/homework/functionplotresponse.pm - view

File: [LON-CAPA] / loncom / homework / functionplotresponse.pm
Revision 1.37: download - view: text, annotated - select for diffs
Sat Nov 13 03:22:58 2010 UTC (13 years, 6 months ago) by www
Branches: MAIN
CVS tags: HEAD

Functionplotresponse hints working

1: # LearningOnline Network with CAPA 2: # option list style responses 3: # 4: # $Id: functionplotresponse.pm,v 1.37 2010/11/13 03:22:58 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: 'functionplotrule','functionplotruleset', 38: 'functionplotelements')); 39: } 40: 41: # 42: # There can be a number of applets on a page, each called ggbApplet_$id, 43: # where $id is the "_"-concatenated part and responseid 44: # 45: 46: sub geogebra_startcode { 47: my ($id)=@_; 48: return (<<ENDSTARTCODE); 49: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar" 50: codebase="/adm/geogebra/" width="714" height="447" MAYSCRIPT> 51: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/> 52: ENDSTARTCODE 53: } 54: 55: sub geogebra_endcode { 56: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n"; 57: } 58: 59: # 60: # This is the internal GeoGebra bytecode which defines the spline functions 61: # 62: sub geogebra_spline_program { 63: return (<<ENDSPLINEPROGRAM); 64: <param name="ggbBase64" value="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65: ENDSPLINEPROGRAM 66: } 67: 68: # 69: # The standard set of parameters inside <applet> 70: # 71: sub geogebra_default_parameters { 72: my ($id)=@_; 73: return(<<ENDDEFAULTPARAMETERS); 74: <param name="image" value="/adm/lonIcons/lonanim.gif" /> 75: <param name="boxborder" value="false" /> 76: <param name="centerimage" value="true" /> 77: <param name="java_arguments" value="-Xmx512m" /> 78: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_properties.jar" /> 79: <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" /> 80: <param name="framePossible" value="false" /> 81: 82: <param name="showResetIcon" value="false" /> 83: <param name="showAnimationButton" value="false" /> 84: <param name="enableRightClick" value="false" /> 85: <param name="errorDialogsActive" value="true" /> 86: <param name="enableLabelDrags" value="false" /> 87: <param name="showMenuBar" value="false" /> 88: <param name="showToolBar" value="false" /> 89: <param name="showToolBarHelp" value="false" /> 90: <param name="showAlgebraInput" value="false" /> 91: <param name="enableShiftDragZoom" value="false" /> 92: <param name="allowRescaling" value="false" /> 93: <param name="enableLabelDrags" value="false" /> 94: <param name="ggbOnInitParam" value="applet_$id" /> 95: ENDDEFAULTPARAMETERS 96: } 97: 98: # 99: # This subroutine is called by LON-CAPA at </problem> 100: # Each applet on the page will call function ggbOnInit when it is done loading 101: # This function in turn will call the respective function registered by start_init_script 102: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit 103: # 104: 105: sub init_script { 106: if ($#Apache::functionplotresponse::callscripts>=0) { 107: my $script=''; 108: foreach my $id (@Apache::functionplotresponse::callscripts) { 109: $script.="if (param=='applet_$id') { loaded_$id=true; }\n"; 110: } 111: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)). 112: ") { setTimeout('ggbInitAll()',20) }"; 113: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts)); 114: return (<<ENDGGBINIT); 115: <script type="text/javascript"> 116: // <![CDATA[ 117: // Function that each applet will call when loaded 118: // It will pass "its" parameter 119: // Set flags for when an applet is loaded, wait till all are loaded, and then some 120: function ggbOnInit(param) { 121: $script 122: } 123: function ggbInitAll() { 124: $calls 125: } 126: // ]]> 127: </script> 128: ENDGGBINIT 129: } 130: } 131: 132: # 133: # Each Geogebra applet is supposed to call this when parameters change 134: # Changes the hidden fields on the web page 135: # 136: sub update_script { 137: my ($id)=@_; 138: return (<<ENDUPDATESCRIPT); 139: <script type="text/javascript"> 140: // <![CDATA[ 141: function updatePointCoordinates_$id(coordinateName) { 142: var x = document.ggbApplet_$id.getXcoord(coordinateName); 143: var y = document.ggbApplet_$id.getYcoord(coordinateName); 144: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x; 145: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y; 146: } 147: // ]]> 148: </script> 149: ENDUPDATESCRIPT 150: } 151: 152: # 153: # Register the above update-handler for a variable 154: # 155: 156: sub update_register { 157: my ($id,$variable)=@_; 158: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n"; 159: } 160: 161: # 162: # Set a coordinate variable 163: # 164: sub set_coordinate { 165: my ($id,$variable,$x,$y)=@_; 166: return (<<ENDSETVARIABLE); 167: document.ggbApplet_$id.evalCommand("$variable=($x,$y)"); 168: ENDSETVARIABLE 169: } 170: 171: # 172: # Input field name for a coordinate variable 173: # 174: 175: sub field_name { 176: my ($id,$variable,$name)=@_; 177: return "HWVAL_$id\_$variable\_$name"; 178: } 179: 180: # 181: # Generate an input field for a coordinate variable 182: # 183: 184: sub generate_input_field { 185: my ($id,$variable,$x,$y)=@_; 186: $Apache::functionplotresponse::inputfields.= 187: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n". 188: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n"; 189: } 190: 191: # 192: # Initialize a new coordinate variable at set a listener on it 193: # 194: sub new_coordinate { 195: my ($id,$variable,$x,$y)=@_; 196: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 197: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 198: } 199: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 200: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 201: } 202: &generate_input_field($id,$variable,$x,$y); 203: return &set_coordinate($id,$variable,$x,$y).&update_register($id,$variable); 204: } 205: 206: # 207: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem> 208: # It then starts the right headers 209: # 210: sub start_init_script { 211: my ($id)=@_; 212: # Add id to the list of ggbInit_$id functions that need to be called 213: push(@Apache::functionplotresponse::callscripts,$id); 214: # ... and open this function 215: return (<<ENDSTARTINIT); 216: <script type="text/javascript"> 217: // <![CDATA[ 218: // variable that will eventually be passed back to the server 219: var coordinateMap_$id = []; 220: // flag for not loaded yet 221: var loaded_$id=false; 222: // Init-function for applet 223: function ggbInit_$id() { 224: ENDSTARTINIT 225: } 226: 227: # 228: # This sets the axes inside ggbInit_$id 229: # 230: 231: sub axes_script { 232: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_; 233: return (<<ENDAXESSCRIPT); 234: // changes (xmin, xmax, ymin, ymax) 235: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax); 236: 237: // makes the (x,y) axis (in)visible 238: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible); 239: // makes the grid (in)visible 240: document.ggbApplet_$id.setGridVisible($gvisible); 241: ENDAXESSCRIPT 242: } 243: 244: sub axes_label { 245: my ($id,$xlabel,$ylabel)=@_; 246: unless ($xlabel || $ylabel) { return ''; } 247: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");'; 248: if ($xlabel) { 249: $return.=(<<ENDXAXISLABELSCRIPT); 250: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)"); 251: document.ggbApplet_$id.setVisible("Xlabel",false); 252: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]"); 253: ENDXAXISLABELSCRIPT 254: } 255: if ($ylabel) { 256: $return.=(<<ENDYAXISLABELSCRIPT); 257: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)"); 258: document.ggbApplet_$id.setVisible("Ylabel",false); 259: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]"); 260: ENDYAXISLABELSCRIPT 261: } 262: return $return; 263: } 264: 265: sub plot_script { 266: my ($id,$function,$fixed)=@_; 267: if ($fixed) { 268: # Use stupid trick to nail this to a location 269: # Oddly, it seems like only one plot cannot be nailed to a location 270: # Non-nailed-down plots apparently get overwritten 271: return (<<ENDPLOTSCRIPT); 272: document.ggbApplet_$id.evalCommand("a=1"); 273: document.ggbApplet_$id.setVisible("a",false); 274: // This MUST be a DEPENDENT OBJECT in order to be locked down: 275: document.ggbApplet_$id.evalCommand("y=a*($function)"); 276: ENDPLOTSCRIPT 277: } else { 278: return "document.ggbApplet_$id.evalCommand('y=$function')"; 279: } 280: } 281: 282: # 283: # Subroutine that generates code for spline $label based on stored information 284: # 285: 286: sub generate_spline { 287: my ($id,$label)=@_; 288: my $result=''; 289: my $order=$Apache::functionplotresponse::splineorder{$label}; 290: my $x=$Apache::functionplotresponse::splineinitx{$label}; 291: my $y=$Apache::functionplotresponse::splineinity{$label}; 292: my $sx=$Apache::functionplotresponse::splinescalex{$label}; 293: my $sy=$Apache::functionplotresponse::splinescaley{$label}; 294: my @coords=(); 295: foreach my $i (1..$order) { 296: $result.=&new_coordinate($id,$label.'P'.$i,$x,$y); 297: $x+=$sx/(2.*($order-1)); 298: push(@coords,$label.'P'.$i); 299: $result.=&new_coordinate($id,$label.'S'.$i,$x,$y+$sy); 300: $x+=$sx/(2.*($order-1)); 301: push(@coords,$label.'S'.$i); 302: } 303: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n"; 304: return $result; 305: } 306: # 307: # <backgroundplot function="..." fixed="yes/no" /> 308: # 309: sub start_backgroundplot { 310: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 311: my $result=''; 312: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 313: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval); 314: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0); 315: 316: unless ($function) { $function="0"; } 317: if ($target eq 'web') { 318: $result.=&plot_script($internalid,$function,$fixed); 319: } elsif ($target eq 'edit') { 320: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot'). 321: &Apache::edit::text_arg('Function:','function', 322: $token,'16'). 323: &Apache::edit::select_arg('Fixed location:','fixed', 324: ['yes','no'],$token). 325: &Apache::edit::end_row(); 326: } elsif ($target eq 'modified') { 327: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 328: $safeeval,'function','fixed'); 329: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 330: } 331: return $result; 332: } 333: 334: sub end_backgroundplot { 335: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 336: my $result=''; 337: if ($target eq 'edit') { 338: $result=&Apache::edit::end_table(); 339: } 340: return $result; 341: } 342: 343: # 344: # <functionplotrule ... /> 345: # 346: sub start_functionplotrule { 347: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 348: my $result=''; 349: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 350: $Apache::functionplotresponse::counter++; 351: if ($label=~/\W/) { 352: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 353: } 354: $label=~s/\W//gs; 355: unless ($label) { 356: $label='R'.$Apache::functionplotresponse::counter; 357: } else { 358: $label='R'.$label; 359: } 360: if ($Apache::functionplotresponse::splineorder{$label}) { 361: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 362: } 363: 364: 365: if ($target eq 'grade') { 366: # Simply remember - in order - for later 367: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval); 368: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval); 369: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) { 370: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.')); 371: } 372: $beginninglabel=~s/\W//gs; 373: $endinglabel=~s/\W//gs; 374: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval); 375: $relationship=~s/\W//gs; 376: $relationship=lc($relationship); 377: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) { 378: &Apache::lonxml::warning(&mt('Rule relationship not defined.')); 379: $relationship='eq'; 380: } 381: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval); 382: unless (($derivative==0) || ($derivative==1) || ($derivative==2)) { 383: &Apache::lonxml::warning(&mt('Rule derivative not defined.')); 384: $derivative=0; 385: } 386: push(@Apache::functionplotresponse::functionplotrules,join(':',( 387: $label, 388: $derivative, 389: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval), 390: $beginninglabel, 391: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval), 392: $endinglabel, 393: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval), 394: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval), 395: $relationship, 396: &Apache::lonxml::get_param('value',$parstack,$safeeval), 397: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval) 398: ))); 399: } elsif ($target eq 'edit') { 400: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule'). 401: &Apache::edit::text_arg('Index/Name:','index', 402: $token,'10').' '. 403: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder', 404: [['0','Function itself'], 405: ['1','First derivative'], 406: ['2','Second derivative']],$token).'<br />'. 407: &Apache::edit::text_arg('(Initial) x-value:','xinitial', 408: $token,'8'). 409: &Apache::edit::select_or_text_arg('(Initial) x-value label:','xinitiallabel', 410: [['start','Start of Plot']],$token,'8').'<br />'. 411: 412: &Apache::edit::text_arg('Optional final x-value for ranges:','xfinal', 413: $token,'8'). 414: &Apache::edit::select_or_text_arg('Optional final x-value label:','xfinallabel', 415: [['end','End of Plot']],$token,'8').'<br />'. 416: &Apache::edit::text_arg('Optional minimum length for range:','minimumlength', 417: $token,'8'). 418: &Apache::edit::text_arg('Optional maximum length for range:','maximumlength', 419: $token,'8').'<br />'. 420: &Apache::edit::select_arg(&mt('Relationship:'),'relationship', 421: [['eq','equal'], 422: ['ne','not equal'], 423: ['ge','greater than or equal'], 424: ['gt','greater than'], 425: ['lt','less than'], 426: ['le','less than or equal']],$token). 427: $result.= &Apache::edit::select_or_text_arg('Value:','value', 428: [['undef','not defined']],$token,'8'). 429: &Apache::edit::text_arg('Percent error:','percenterror', 430: $token,'8'). 431: &Apache::edit::end_row(); 432: } elsif ($target eq 'modified') { 433: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 434: $safeeval,'index','derivativeorder', 435: 'xinitial','xinitiallabel','xfinal','xfinallabel', 436: 'minimumlength','maximumlength', 437: 'relationship','value','percenterror'); 438: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 439: } 440: return $result; 441: } 442: 443: sub end_functionplotrule { 444: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 445: my $result=''; 446: if ($target eq 'edit') { 447: $result=&Apache::edit::end_table(); 448: } 449: return $result; 450: } 451: 452: 453: # 454: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> 455: # 456: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them 457: # 458: sub start_spline { 459: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 460: my $result=''; 461: if ($target eq 'web') { 462: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 463: $Apache::functionplotresponse::counter++; 464: if ($label=~/\W/) { 465: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); 466: } 467: $label=~s/\W//gs; 468: unless ($label) { 469: $label='S'.$Apache::functionplotresponse::counter; 470: } else { 471: $label='S'.$label; 472: } 473: if ($Apache::functionplotresponse::splineorder{$label}) { 474: &Apache::lonxml::error(&mt('Spline indices must be unique.')); 475: } 476: 477: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); 478: if ($order<2) { $order=2; } 479: if ($order>8) { $order=8; } 480: $Apache::functionplotresponse::splineorder{$label}=$order; 481: 482: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval); 483: unless ($x) { $x=0; } 484: $Apache::functionplotresponse::splineinitx{$label}=$x; 485: 486: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval); 487: unless ($y) { $y=0; } 488: $Apache::functionplotresponse::splineinity{$label}=$y; 489: 490: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval); 491: unless ($sx) { $sx=$order; } 492: $Apache::functionplotresponse::splinescalex{$label}=$sx; 493: 494: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval); 495: unless ($sy) { $sy=2; } 496: $Apache::functionplotresponse::splinescaley{$label}=$sy; 497: } elsif ($target eq 'edit') { 498: $result=&Apache::edit::tag_start($target,$token,'Spline'). 499: &Apache::edit::text_arg('Index:','index', 500: $token,'4').' '. 501: &Apache::edit::select_arg('Order:','order', 502: ['2','3','4','5','6','7','8','9'],$token).' '. 503: &Apache::edit::text_arg('Initial x-value:','initx', 504: $token,'4').' '. 505: &Apache::edit::text_arg('Initial y-value:','inity', 506: $token,'4').' '. 507: &Apache::edit::text_arg('Scale x:','scalex', 508: $token,'4').' '. 509: &Apache::edit::text_arg('Scale y:','scaley', 510: $token,'4'). 511: &Apache::edit::end_row(); 512: } elsif ($target eq 'modified') { 513: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 514: $safeeval,'index','order','initx','inity', 515: 'scalex','scaley'); 516: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 517: } 518: return $result; 519: } 520: 521: sub end_spline { 522: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 523: my $result=''; 524: if ($target eq 'edit') { 525: $result=&Apache::edit::end_table(); 526: } 527: return $result; 528: } 529: 530: sub end_init_script { 531: return (<<ENDENDINIT); 532: } 533: // ]]> 534: </script> 535: ENDENDINIT 536: } 537: 538: # 539: # Storing and restoring spline coordinates from part answers 540: # 541: sub decode_previous_answer { 542: my ($answer)=@_; 543: foreach my $coordinate (split(/\,/,$answer)) { 544: my ($key,$value)=split(/\=/,$coordinate); 545: $Apache::functionplotresponse::previous{$key}=$value; 546: } 547: } 548: 549: sub get_answer_from_form_fields { 550: my ($id)=@_; 551: my $answer=''; 552: my %coords=(); 553: foreach my $field (keys(%env)) { 554: if ($field=~/^form\.HWVAL\_$id/) { 555: $field=~/^form\.(.*)$/; 556: $coords{$1}=$env{$field}; 557: } 558: } 559: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords)))); 560: return ($answer,%coords); 561: } 562: 563: # 564: # The following functions calculate the cubic-hermite splines server-side 565: # 566: 567: sub cubic_hermite { 568: my ($t,$p1,$s1,$p2,$s2)=@_; 569: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 5.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+ 570: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 5.*($t*$t*$t-$t*$t) *($s2-$p2); 571: } 572: 573: # 574: # d/dt(...) 575: # 576: 577: sub ddt_cubic_hermite { 578: my ($t,$p1,$s1,$p2,$s2)=@_; 579: return (6.*$t*$t-6.*$t) *$p1 + 5.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+ 580: (-6.*$t*$t+6.*$t)*$p2 + 5.*(3.*$t*$t-2.*$t) *($s2-$p2); 581: } 582: 583: # 584: # d^2/dt^2(...) 585: # 586: 587: sub d2dt2_cubic_hermite { 588: my ($t,$p1,$s1,$p2,$s2)=@_; 589: return (12.*$t-6.) *$p1 + 5.*(6.*$t-4.)*($s1-$p1)+ 590: (-12.*$t+6.)*$p2 + 5.*(6.*$t-2.)*($s2-$p2); 591: } 592: 593: # 594: # Array index calculation 595: # 596: sub array_index { 597: my ($xmin,$xmax,$x)=@_; 598: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); 599: } 600: 601: # 602: # Populate the arrays 603: # 604: 605: sub populate_arrays { 606: my ($id,$xmin,$xmax)=@_; 607: for (my $i=0; $i<=400; $i++) { 608: $Apache::functionplotresponse::actualxval[$i]=undef; 609: $Apache::functionplotresponse::func[$i]=undef; 610: $Apache::functionplotresponse::dfuncdx[$i]=undef; 611: $Apache::functionplotresponse::d2funcd2x[$i]=undef; 612: } 613: unless ($xmax>$xmin) { return 'no_func'; } 614: # Run over all splines in response 615: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { 616: my $xiold=-1; 617: # Run over all points in spline 618: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { 619: my $ni=$i+1; 620: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, 621: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, 622: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'}, 623: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'}); 624: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'}, 625: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, 626: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, 627: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); 628: # Run in small steps over spline parameter 629: for (my $t=0; $t<=1; $t+=0.0001) { 630: my $xreal=&cubic_hermite($t,@xparms); 631: my $xi=&array_index($xmin,$xmax,$xreal); 632: if ($xi<$xiold) { return 'no_func'; } 633: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { 634: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; } 635: $xiold=$xi; 636: $Apache::functionplotresponse::actualxval[$xi]=$xreal; 637: # Function value 638: my $funcval=&cubic_hermite($t,@yparms); 639: $Apache::functionplotresponse::func[$xi]=$funcval; 640: if (defined($funcval)) { 641: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) { 642: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi; 643: } 644: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) { 645: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi; 646: } 647: } 648: # Chain rule 649: # dy/dx=dy/dt/(dx/dt) 650: my $dxdt=&ddt_cubic_hermite($t,@xparms); 651: if ($dxdt) { 652: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; 653: # Second derivative 654: $Apache::functionplotresponse::d2funcdx2[$xi]= 655: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/ 656: ($dxdt*$dxdt*$dxdt); 657: } 658: } 659: } 660: } 661: } 662: } 663: 664: # 665: # Implementation of <functionplotresponse> 666: # 667: 668: sub start_functionplotresponse { 669: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 670: my $result=''; 671: # To remember the splines - somehow, they need to come last 672: undef %Apache::functionplotresponse::splineorder; 673: undef %Apache::functionplotresponse::splineinitx; 674: undef %Apache::functionplotresponse::splineinity; 675: undef %Apache::functionplotresponse::splinescalex; 676: undef %Apache::functionplotresponse::splinescaley; 677: # Remember input fields, etc 678: undef %Apache::functionplotresponse::previous; 679: $Apache::functionplotresponse::inputfields=''; 680: $Apache::functionplotresponse::counter=0; 681: # Remember rules 682: undef @Apache::functionplotresponse::functionplotrules; 683: # Remember failed rules 684: if ($target eq 'grade') { 685: undef @Apache::functionplotresponse::failedrules; 686: } 687: # Delete previous awards 688: undef $Apache::functionplotresponse::awarddetail; 689: # Part and ID 690: my $partid=$Apache::inputtags::part; 691: my $id=&Apache::response::start_response($parstack,$safeeval); 692: # Internal ID to mark the applet and its coordinates 693: my $internalid = $partid.'_'.$id; 694: # Previous answer 695: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"}); 696: 697: # Parameters of <functionplotresponse> 698: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval); 699: $xmin=(defined($xmin)?$xmin:-10); 700: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval); 701: $xmax=(defined($xmax)?$xmax:10); 702: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval); 703: $ymin=(defined($ymin)?$ymin:-10); 704: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval); 705: $ymax=(defined($ymax)?$ymax:10); 706: if ($xmax<=$xmin) { 707: &Apache::lonxml::warning('Maximum x-value needs to be larger than minimum value.'); 708: $xmax=$xmin+20; 709: } 710: if ($ymax<=$ymin) { 711: &Apache::lonxml::warning('Maximum y-value needs to be larger than minimum value.'); 712: $ymax=$ymin+20; 713: } 714: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 715: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 716: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 717: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval); 718: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval); 719: if ($target eq 'edit') { 720: $result.=&Apache::edit::start_table($token) 721: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>' 722: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 723: .&Apache::edit::deletelist($target,$token).'   ' 724: .&Apache::edit::insertlist($target,$token) 725: .'</span></td>' 726: ."<td> " 727: .&Apache::edit::end_row() 728: .&Apache::edit::start_spanning_row() 729: ."\n"; 730: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel', 731: $token,'6').' '. 732: &Apache::edit::text_arg('Minimum x-value:','xmin', 733: $token,'4').' '. 734: &Apache::edit::text_arg('Maximum x-value:','xmax', 735: $token,'4').' '. 736: &Apache::edit::select_arg('x-axis visible:','xaxisvisible', 737: ['yes','no'],$token).'<br />'. 738: &Apache::edit::text_arg('Label y-axis:','ylabel', 739: $token,'6').' '. 740: &Apache::edit::text_arg('Minimum y-value:','ymin', 741: $token,'4').' '. 742: &Apache::edit::text_arg('Maximum y-value:','ymax', 743: $token,'4').' '. 744: &Apache::edit::select_arg('y-axis visible:','yaxisvisible', 745: ['yes','no'],$token).'<br />'. 746: &Apache::edit::select_arg('Grid visible:','gridvisible', 747: ['yes','no'],$token). 748: &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 749: } elsif ($target eq 'modified') { 750: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 751: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax', 752: 'xaxisvisible','yaxisvisible','gridvisible'); 753: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 754: 755: } elsif ($target eq 'meta') { 756: $result=&Apache::response::meta_package_write('functionplotresponse'); 757: } elsif (($target eq 'answer') && 758: ($env{'form.answer_output_mode'} ne 'tex') && 759: ($Apache::lonhomework::viewgrades == 'F')) { 760: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser(); 761: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen(); 762: my $start_page = &Apache::loncommon::start_page('Rules Log', undef, 763: {'only_body' => 1, 764: 'bgcolor' => '#FFFFFF', 765: 'js_ready' => 1,}); 766: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,}); 767: $uname =~s/\W//g; 768: $udom =~s/\W//g; 769: my $function_name = 770: join('_','LONCAPA_scriptvars',$uname,$udom, 771: $env{'form.counter'},$Apache::lonxml::curdepth); 772: my $rules_var ="<script type=\"text/javascript\"> 773: // <![CDATA[ 774: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>". 775: $Apache::functionplotresponse::ruleslog. 776: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()} 777: // ]]> 778: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />"; 779: &Apache::lonxml::add_script_result($rules_var); 780: } 781: 782: return $result; 783: } 784: 785: sub compare_rel { 786: my ($relationship,$value,$realval,$tol)=@_; 787: # is the real value undefined? 788: unless (defined($realval)) { 789: # the real value is not defined 790: if ($relationship eq 'eq') { 791: if ($value eq 'undef') { 792: return 1; 793: } else { 794: return 0; 795: } 796: } elsif ($relationship eq 'ne') { 797: if ($value eq 'undef') { 798: return 0; 799: } else { 800: return 1; 801: } 802: } else { 803: return 0; 804: } 805: } 806: 807: # is the expected value undefined? 808: if ($value eq 'undef') { 809: # but by now we know that the real value is defined 810: return 0; 811: } 812: 813: # both are defined. 814: if ($relationship eq 'gt') { 815: return ($realval>$value); 816: } elsif ($relationship eq 'ge') { 817: return ($realval>$value-$tol); 818: } elsif ($relationship eq 'lt') { 819: return ($realval<$value); 820: } elsif ($relationship eq 'le') { 821: return ($realval<$value+$tol); 822: } elsif ($relationship eq 'ne') { 823: return (abs($value-$realval)>$tol); 824: } else { 825: return (abs($value-$realval)<$tol); 826: } 827: return 0; 828: } 829: 830: sub addlog { 831: my ($text)=@_; 832: $Apache::functionplotresponse::ruleslog.=$text.'<br />'; 833: } 834: 835: sub actualval { 836: my ($i,$xmin,$xmax)=@_; 837: return $xmin+$i/400.*($xmax-$xmin); 838: } 839: 840: sub functionplotrulecheck { 841: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_; 842: 843: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent) 844: =split(/\:/,$rule); 845: $percent=($percent>0?$percent:5); 846: &addlog("================="); 847: &addlog("Rule $label for ".('function itself','first derivative','second derivative')[$derivative]." $relationship $value"); 848: my $li=0; 849: my $lh=400; 850: 851: # Special case: the upper boundary was not defined 852: # and needs to be set to the value where 853: # the condition is not true anymore => set flag 854: 855: my $findupper=0; 856: if (($xfinal eq '') 857: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) 858: && ($xfinallabel)) { 859: $findupper=1; 860: } 861: 862: # if a hard value is set for the boundaries, it overrides the label 863: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) { 864: $li=&array_index($xmin,$xmax,$xinitial); 865: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li; 866: } 867: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) { 868: $lh=&array_index($xmin,$xmax,$xfinal); 869: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh; 870: } 871: # if the label is defined, use it 872: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) { 873: &addlog("Using lower label $xinitiallabel"); 874: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}; 875: } else { 876: $li=&array_index($xmin,$xmax,$xinitial); 877: } 878: unless ($findupper) { 879: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) { 880: &addlog("Using upper label $xfinallabel"); 881: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1; 882: } else { 883: $lh=&array_index($xmin,$xmax,$xfinal); 884: } 885: } 886: # Basic sanity checks 887: if ($li<0) { $li=0; } 888: if ($lh>400) { $lh=400; } 889: if ($li>$lh) { 890: $lh=$li; 891: } 892: 893: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=". 894: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))"); 895: if ($findupper) { 896: &addlog("Looking for label $xfinallabel"); 897: } 898: my $tol=$percent*($ymax-$ymin)/100; 899: if ($xmax>$xmin) { 900: if ($derivative==2) { 901: $tol=4.*$tol/($xmax-$xmin); 902: } elsif ($derivative==1) { 903: $tol=2.*$tol/($xmax-$xmin); 904: } 905: } 906: for (my $i=$li; $i<=$lh; $i++) { 907: my $val; 908: if ($derivative==2) { 909: $val=$Apache::functionplotresponse::d2funcdx2[$i]; 910: } elsif ($derivative==1) { 911: $val=$Apache::functionplotresponse::dfuncdx[$i]; 912: } else { 913: $val=$Apache::functionplotresponse::func[$i]; 914: } 915: unless (&compare_rel($relationship,$value,$val,$tol)) { 916: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol"); 917: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)"); 918: if (($findupper) && ($i>$li)) { 919: # check for minimum and maximum lengths 920: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax); 921: if ($minimumlength) { 922: if ($length<$minimumlength) { 923: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength"); 924: return 0; 925: } 926: } 927: if ($maximumlength) { 928: if ($length>$maximumlength) { 929: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength"); 930: return 0; 931: } 932: } 933: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i; 934: &addlog("Rule $label passed, setting label $xfinallabel"); 935: return 1; 936: } else { 937: &addlog("Rule $label failed."); 938: my $hintlabel=$label; 939: $hintlabel=~s/^R//; 940: push(@Apache::functionplotresponse::failedrules,$hintlabel); 941: &addlog("Set hint condition $hintlabel"); 942: return 0; 943: } 944: } 945: } 946: &addlog("Rule $label passed."); 947: return 1; 948: } 949: 950: sub start_functionplotruleset { 951: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 952: if ($target eq 'edit') { 953: return &Apache::edit::start_table($token). 954: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>' 955: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 956: .&Apache::edit::deletelist($target,$token).'   '. 957: &Apache::edit::insertlist($target,$token) 958: .'</span></td>' 959: ."<td> " 960: .&Apache::edit::end_row() 961: .&Apache::edit::start_spanning_row() 962: ."\n"; 963: } 964: } 965: 966: sub end_functionplotruleset { 967: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 968: my $id=$Apache::inputtags::response[-1]; 969: my $partid=$Apache::inputtags::part; 970: my $internalid = $partid.'_'.$id; 971: 972: if ($target eq 'edit' ) { 973: return &Apache::edit::end_table(); 974: } elsif ($target eq 'grade' 975: && &Apache::response::submitted() 976: && $Apache::lonhomework::type ne 'exam') { 977: # 978: # Actually grade 979: # 980: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,-2); 981: $xmin=(defined($xmin)?$xmin:-10); 982: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,-2); 983: $xmax=(defined($xmax)?$xmax:10); 984: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,-2); 985: $ymin=(defined($ymin)?$ymin:-10); 986: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,-2); 987: $ymax=(defined($ymax)?$ymax:10); 988: 989: my $ad=''; 990: undef %Apache::functionplotresponse::functionplotrulelabels; 991: $Apache::functionplotresponse::ruleslog=''; 992: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400; 993: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0; 994: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') { 995: $ad='NOT_FUNCTION'; 996: } else { 997: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ". 998: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")"); 999: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ". 1000: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")"); 1001: 1002: # We have a function that we can actually grade, go through the spline rules. 1003: foreach my $rule (@Apache::functionplotresponse::functionplotrules) { 1004: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) { 1005: $ad='INCORRECT'; 1006: last; 1007: } 1008: } 1009: # If it's not wrong, it's correct 1010: unless ($ad) { $ad='EXACT_ANS' }; 1011: } 1012: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules)); 1013: &addlog("Assigned award detail: $ad"); 1014: # Store for later to be assigned at end_functionplotresponse 1015: $Apache::functionplotresponse::awarddetail=$ad; 1016: } 1017: } 1018: 1019: 1020: sub end_functionplotresponse { 1021: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1022: &Apache::response::end_response; 1023: 1024: my $result; 1025: my $id=$Apache::inputtags::response[-1]; 1026: my $partid=$Apache::inputtags::part; 1027: my $internalid = $partid.'_'.$id; 1028: 1029: if ($target eq 'edit') { $result=&Apache::edit::end_table(); } 1030: if ($target eq 'grade' 1031: && &Apache::response::submitted() 1032: && $Apache::lonhomework::type eq 'exam') { 1033: 1034: &Apache::response::scored_response($partid,$id); 1035: 1036: } elsif ($target eq 'grade' 1037: && &Apache::response::submitted() 1038: && $Apache::lonhomework::type ne 'exam') { 1039: my ($response,%coords)=&get_answer_from_form_fields($internalid); 1040: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; 1041: my %previous=&Apache::response::check_for_previous($response,$partid,$id); 1042: # 1043: # Assign grade 1044: # 1045: my $ad=$Apache::functionplotresponse::awarddetail; 1046: # 1047: # Store grading info 1048: # 1049: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; 1050: &Apache::response::handle_previous(\%previous,$ad); 1051: } elsif ($target eq 'web') { 1052: undef @Apache::functionplotresponse::failedrules; 1053: } 1054: return $result; 1055: } 1056: 1057: sub end_functionplotelements { 1058: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1059: my $result=''; 1060: my $id=$Apache::inputtags::response[-1]; 1061: my $partid=$Apache::inputtags::part; 1062: my $internalid = $partid.'_'.$id; 1063: if ($target eq 'edit' ) { 1064: $result=&Apache::edit::end_table(); 1065: } elsif ($target eq 'web') { 1066: # Now is the time to render all of the stored splines 1067: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1068: $result.=&generate_spline($internalid,$label); 1069: } 1070: # close the init script 1071: $result.=&end_init_script(); 1072: # register all splines in this response 1073: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'. 1074: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n"; 1075: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1076: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'. 1077: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n"; 1078: } 1079: # generate the input fields 1080: $result.=$Apache::functionplotresponse::inputfields; 1081: # actually start the <applet>-tag 1082: $result.=&geogebra_startcode($internalid); 1083: # load the spline bytecode 1084: $result.=&geogebra_spline_program(); 1085: # set default parameters 1086: $result.=&geogebra_default_parameters($internalid); 1087: # close the <applet>-tag 1088: $result.=&geogebra_endcode(); 1089: } 1090: return $result; 1091: } 1092: 1093: sub start_functionplotelements { 1094: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1095: my $result=''; 1096: my $id=$Apache::inputtags::response[-1]; 1097: my $partid=$Apache::inputtags::part; 1098: my $internalid = $partid.'_'.$id; 1099: 1100: if ($target eq 'edit') { 1101: return &Apache::edit::start_table($token). 1102: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>' 1103: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1104: .&Apache::edit::deletelist($target,$token).'   '. 1105: &Apache::edit::insertlist($target,$token) 1106: .'</span></td>' 1107: ."<td> " 1108: .&Apache::edit::end_row() 1109: .&Apache::edit::start_spanning_row() 1110: ."\n"; 1111: } elsif ($target eq 'web') { 1112: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,-2); 1113: $xmin=(defined($xmin)?$xmin:-10); 1114: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,-2); 1115: $xmax=(defined($xmax)?$xmax:10); 1116: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,-2); 1117: $ymin=(defined($ymin)?$ymin:-10); 1118: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,-2); 1119: $ymax=(defined($ymax)?$ymax:10); 1120: if ($xmax<=$xmin) { 1121: $xmax=$xmin+20; 1122: } 1123: if ($ymax<=$ymin) { 1124: $ymax=$ymin+20; 1125: } 1126: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1127: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1128: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1129: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2); 1130: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2); 1131: 1132: 1133: # paste in the update routine to receive stuff back from the applet 1134: $result.=&update_script($internalid); 1135: # start the initscript for this applet 1136: $result.=&start_init_script($internalid); 1137: # put the axis commands inside 1138: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible); 1139: $result.=&axes_label($internalid,$xlabel,$ylabel); 1140: # init script is left open 1141: } 1142: return $result; 1143: } 1144: 1145: 1; 1146: 1147: __END__ 1148: 1149: =head1 NAME 1150: 1151: Apache::functionplotresponse.pm; 1152: 1153: =head1 SYNOPSIS 1154: 1155: Handles tags associated with accepting function plots. 1156: 1157: This is part of the LearningOnline Network with CAPA project 1158: described at http://www.lon-capa.org. 1159: 1160: =head1 HANDLER SUBROUTINE 1161: 1162: start_functionplotresponse() 1163: 1164: =head1 OTHER SUBROUTINES 1165: 1166: =over 1167: 1168: =item end_functionplotresponse() 1169: 1170: =back 1171: 1172: =cut