loncom/homework/functionplotresponse.pm - view

File: [LON-CAPA] / loncom / homework / functionplotresponse.pm
Revision 1.40: download - view: text, annotated - select for diffs
Fri Nov 19 17:20:44 2010 UTC (13 years, 7 months ago) by www
Branches: MAIN
CVS tags: HEAD

New interface code

1: # LearningOnline Network with CAPA 2: # option list style responses 3: # 4: # $Id: functionplotresponse.pm,v 1.40 2010/11/19 17:20:44 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_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar" 50: codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT> 51: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/> 52: ENDSTARTCODE 53: } 54: 55: sub geogebra_endcode { 56: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n"; 57: } 58: 59: # 60: # This is the internal GeoGebra bytecode which defines the spline functions 61: # 62: sub geogebra_spline_program { 63: return (<<ENDSPLINEPROGRAM); 64: <param name="ggbBase64" value="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65: ENDSPLINEPROGRAM 66: } 67: 68: # 69: # The standard set of parameters inside <applet> 70: # 71: sub geogebra_default_parameters { 72: my ($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="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_algos.jar, geogebra_export.jar, geogebra_javascript.jar, jlatexmath.jar, jlm_greek.jar, jlm_cyrillic.jar, geogebra_properties.jar" /> 78: <param name="cache_version" value="3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0, 3.9.115.0" /> 79: <param name="framePossible" value="false" /> 80: 81: <param name="showResetIcon" value="false" /> 82: <param name="showAnimationButton" value="false" /> 83: <param name="enableRightClick" value="false" /> 84: <param name="errorDialogsActive" value="true" /> 85: <param name="enableLabelDrags" value="false" /> 86: <param name="showMenuBar" value="false" /> 87: <param name="showToolBar" value="false" /> 88: <param name="showToolBarHelp" value="false" /> 89: <param name="showAlgebraInput" value="false" /> 90: <param name="enableShiftDragZoom" value="false" /> 91: <param name="allowRescaling" value="false" /> 92: <param name="enableLabelDrags" value="false" /> 93: <param name="ggbOnInitParam" value="applet_$id" /> 94: ENDDEFAULTPARAMETERS 95: } 96: 97: # 98: # This subroutine is called by LON-CAPA at </problem> 99: # Each applet on the page will call function ggbOnInit when it is done loading 100: # This function in turn will call the respective function registered by start_init_script 101: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit 102: # 103: 104: sub init_script { 105: if ($#Apache::functionplotresponse::callscripts>=0) { 106: my $script=''; 107: foreach my $id (@Apache::functionplotresponse::callscripts) { 108: $script.="if (param=='applet_$id') { loaded_$id=true; }\n"; 109: } 110: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)). 111: ") { setTimeout('ggbInitAll()',20) }"; 112: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts)); 113: return (<<ENDGGBINIT); 114: <script type="text/javascript"> 115: // <![CDATA[ 116: // Function that each applet will call when loaded 117: // It will pass "its" parameter 118: // Set flags for when an applet is loaded, wait till all are loaded, and then some 119: function ggbOnInit(param) { 120: $script 121: } 122: function ggbInitAll() { 123: $calls 124: } 125: // ]]> 126: </script> 127: ENDGGBINIT 128: } 129: } 130: 131: # 132: # Each Geogebra applet is supposed to call this when parameters change 133: # Changes the hidden fields on the web page 134: # 135: sub update_script { 136: my ($id)=@_; 137: return (<<ENDUPDATESCRIPT); 138: <script type="text/javascript"> 139: // <![CDATA[ 140: function updatePointCoordinates_$id(coordinateName) { 141: var x = document.ggbApplet_$id.getXcoord(coordinateName); 142: var y = document.ggbApplet_$id.getYcoord(coordinateName); 143: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x; 144: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y; 145: } 146: // ]]> 147: </script> 148: ENDUPDATESCRIPT 149: } 150: 151: # 152: # Register the above update-handler for a variable 153: # 154: 155: sub update_register { 156: my ($id,$variable)=@_; 157: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n"; 158: } 159: 160: # 161: # Set a point coordinate variable 162: # 163: sub set_point_coordinate { 164: my ($id,$variable,$x,$y)=@_; 165: return (<<ENDSETVARIABLE); 166: document.ggbApplet_$id.evalCommand("$variable=($x,$y)"); 167: document.ggbApplet_$id.setLabelVisible("$variable",false); 168: ENDSETVARIABLE 169: } 170: 171: # 172: # Set a slope coordinate variable 173: # 174: sub set_slope_coordinate { 175: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname)=@_; 176: my $xvariable=$variable.'x'; 177: my $yvariable=$variable.'y'; 178: my $domain=$xmax-$xmin; 179: my $range=$ymax-$ymin; 180: my $xinterval=$domain/100.; 181: my $yinterval=$range/200.; 182: return (<<ENDSETSVARIABLE); 183: document.ggbApplet_$id.evalCommand("$xvariable=Slider[0,$domain,$xinterval]"); 184: document.ggbApplet_$id.setVisible("$xvariable", false); 185: document.ggbApplet_$id.evalCommand("$xvariable=$xrel"); 186: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]"); 187: document.ggbApplet_$id.setVisible("$yvariable", false); 188: document.ggbApplet_$id.evalCommand("$yvariable=$yrel"); 189: document.ggbApplet_$id.evalCommand("$variable=($xvariable+x($pointname),$yvariable+y($pointname))"); 190: document.ggbApplet_$id.setLabelVisible("$variable", false); 191: ENDSETSVARIABLE 192: } 193: 194: # 195: # Input field name for a coordinate variable 196: # 197: 198: sub field_name { 199: my ($id,$variable,$name)=@_; 200: return "HWVAL_$id\_$variable\_$name"; 201: } 202: 203: # 204: # Generate an input field for a coordinate variable 205: # 206: 207: sub generate_input_field { 208: my ($id,$variable,$x,$y)=@_; 209: $Apache::functionplotresponse::inputfields.= 210: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n". 211: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n"; 212: } 213: 214: # 215: # Initialize a new point coordinate variable at set a listener on it 216: # 217: sub new_point_coordinate { 218: my ($id,$variable,$x,$y)=@_; 219: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 220: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 221: } 222: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 223: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 224: } 225: &generate_input_field($id,$variable,$x,$y); 226: return &set_point_coordinate($id,$variable,$x,$y).&update_register($id,$variable); 227: } 228: 229: # 230: # Initialize a new slope coordinate variable at set a listener on it 231: # 232: sub new_slope_coordinate { 233: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax)=@_; 234: # 235: # $variable: name of the slope point 236: # $x, $y: coordinates of the slope point 237: # $pointname: name of the associated point point 238: # $xp $yp: coordinates of the point point 239: # 240: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 241: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 242: } 243: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 244: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 245: } 246: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) { 247: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')}; 248: } 249: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) { 250: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')}; 251: } 252: 253: &generate_input_field($id,$variable,$x,$y); 254: my $xrel=$x-$xp; 255: my $yrel=$y-$yp; 256: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname).&update_register($id,$variable); 257: } 258: 259: # 260: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem> 261: # It then starts the right headers 262: # 263: sub start_init_script { 264: my ($id)=@_; 265: # Add id to the list of ggbInit_$id functions that need to be called 266: push(@Apache::functionplotresponse::callscripts,$id); 267: # ... and open this function 268: return (<<ENDSTARTINIT); 269: <script type="text/javascript"> 270: // <![CDATA[ 271: // variable that will eventually be passed back to the server 272: var coordinateMap_$id = []; 273: // flag for not loaded yet 274: var loaded_$id=false; 275: // Init-function for applet 276: function ggbInit_$id() { 277: ENDSTARTINIT 278: } 279: 280: # 281: # This sets the axes inside ggbInit_$id 282: # 283: 284: sub axes_script { 285: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_; 286: return (<<ENDAXESSCRIPT); 287: // changes (xmin, xmax, ymin, ymax) 288: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax); 289: 290: // makes the (x,y) axis (in)visible 291: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible); 292: // makes the grid (in)visible 293: document.ggbApplet_$id.setGridVisible($gvisible); 294: ENDAXESSCRIPT 295: } 296: 297: sub axes_label { 298: my ($id,$xlabel,$ylabel)=@_; 299: unless ($xlabel || $ylabel) { return ''; } 300: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");'; 301: if ($xlabel) { 302: $return.=(<<ENDXAXISLABELSCRIPT); 303: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)"); 304: document.ggbApplet_$id.setVisible("Xlabel",false); 305: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]"); 306: ENDXAXISLABELSCRIPT 307: } 308: if ($ylabel) { 309: $return.=(<<ENDYAXISLABELSCRIPT); 310: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)"); 311: document.ggbApplet_$id.setVisible("Ylabel",false); 312: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]"); 313: ENDYAXISLABELSCRIPT 314: } 315: return $return; 316: } 317: 318: sub plot_script { 319: my ($id,$function,$fixed)=@_; 320: if ($fixed) { 321: # Use stupid trick to nail this to a location 322: # Oddly, it seems like only one plot cannot be nailed to a location 323: # Non-nailed-down plots apparently get overwritten 324: return (<<ENDPLOTSCRIPT); 325: document.ggbApplet_$id.evalCommand("a=1"); 326: document.ggbApplet_$id.setVisible("a",false); 327: // This MUST be a DEPENDENT OBJECT in order to be locked down: 328: document.ggbApplet_$id.evalCommand("y=a*($function)"); 329: ENDPLOTSCRIPT 330: } else { 331: return "document.ggbApplet_$id.evalCommand('y=$function')"; 332: } 333: } 334: 335: # 336: # Subroutine that generates code for spline $label based on stored information 337: # 338: 339: sub generate_spline { 340: my ($id,$label,$xmin,$xmax,$ymin,$ymax)=@_; 341: my $result=''; 342: my $order=$Apache::functionplotresponse::splineorder{$label}; 343: my $x=$Apache::functionplotresponse::splineinitx{$label}; 344: my $y=$Apache::functionplotresponse::splineinity{$label}; 345: my $sx=$Apache::functionplotresponse::splinescalex{$label}; 346: my $sy=$Apache::functionplotresponse::splinescaley{$label}; 347: my @coords=(); 348: foreach my $i (1..$order) { 349: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y); 350: my $xp=$x; 351: $x+=$sx/(2.*($order-1)); 352: push(@coords,$label.'P'.$i); 353: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax); 354: $x+=$sx/(2.*($order-1)); 355: push(@coords,$label.'S'.$i); 356: } 357: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n"; 358: return $result; 359: } 360: # 361: # <backgroundplot function="..." fixed="yes/no" /> 362: # 363: sub start_backgroundplot { 364: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 365: my $result=''; 366: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 367: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval); 368: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0); 369: 370: unless ($function) { $function="0"; } 371: if ($target eq 'web') { 372: $result.=&plot_script($internalid,$function,$fixed); 373: } elsif ($target eq 'edit') { 374: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot'). 375: &Apache::edit::text_arg('Function:','function', 376: $token,'16'). 377: &Apache::edit::select_arg('Fixed location:','fixed', 378: ['yes','no'],$token). 379: &Apache::edit::end_row(); 380: } elsif ($target eq 'modified') { 381: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 382: $safeeval,'function','fixed'); 383: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 384: } 385: return $result; 386: } 387: 388: sub end_backgroundplot { 389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 390: my $result=''; 391: if ($target eq 'edit') { 392: $result=&Apache::edit::end_table(); 393: } 394: return $result; 395: } 396: 397: # 398: # <functionplotrule ... /> 399: # 400: sub start_functionplotrule { 401: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 402: my $result=''; 403: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 404: $Apache::functionplotresponse::counter++; 405: if ($label=~/\W/) { 406: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 407: } 408: $label=~s/\W//gs; 409: unless ($label) { 410: $label='R'.$Apache::functionplotresponse::counter; 411: } else { 412: $label='R'.$label; 413: } 414: if ($Apache::functionplotresponse::splineorder{$label}) { 415: &Apache::lonxml::error(&mt('Rule indices must be unique.')); 416: } 417: 418: 419: if ($target eq 'grade') { 420: # Simply remember - in order - for later 421: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval); 422: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval); 423: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) { 424: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.')); 425: } 426: $beginninglabel=~s/\W//gs; 427: $endinglabel=~s/\W//gs; 428: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval); 429: $relationship=~s/\W//gs; 430: $relationship=lc($relationship); 431: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) { 432: &Apache::lonxml::warning(&mt('Rule relationship not defined.')); 433: $relationship='eq'; 434: } 435: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval); 436: unless (($derivative==0) || ($derivative==1) || ($derivative==2)) { 437: &Apache::lonxml::warning(&mt('Rule derivative not defined.')); 438: $derivative=0; 439: } 440: push(@Apache::functionplotresponse::functionplotrules,join(':',( 441: $label, 442: $derivative, 443: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval), 444: $beginninglabel, 445: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval), 446: $endinglabel, 447: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval), 448: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval), 449: $relationship, 450: &Apache::lonxml::get_param('value',$parstack,$safeeval), 451: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval) 452: ))); 453: } elsif ($target eq 'edit') { 454: $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule'). 455: &Apache::edit::text_arg('Index/Name:','index', 456: $token,'10').' '. 457: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder', 458: [['0','Function itself'], 459: ['1','First derivative'], 460: ['2','Second derivative']],$token).'<br />'. 461: &Apache::edit::text_arg('(Initial) x-value:','xinitial', 462: $token,'8'). 463: &Apache::edit::select_or_text_arg('(Initial) x-value label:','xinitiallabel', 464: [['start','Start of Plot']],$token,'8').'<br />'. 465: 466: &Apache::edit::text_arg('Optional final x-value for ranges:','xfinal', 467: $token,'8'). 468: &Apache::edit::select_or_text_arg('Optional final x-value label:','xfinallabel', 469: [['end','End of Plot']],$token,'8').'<br />'. 470: &Apache::edit::text_arg('Optional minimum length for range:','minimumlength', 471: $token,'8'). 472: &Apache::edit::text_arg('Optional maximum length for range:','maximumlength', 473: $token,'8').'<br />'. 474: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship', 475: [['eq','equal'], 476: ['ne','not equal'], 477: ['ge','greater than or equal'], 478: ['gt','greater than'], 479: ['lt','less than'], 480: ['le','less than or equal']],$token). 481: $result.= &Apache::edit::select_or_text_arg('Value:','value', 482: [['undef','not defined']],$token,'8'). 483: &Apache::edit::text_arg('Percent error:','percenterror', 484: $token,'8'). 485: &Apache::edit::end_row(); 486: } elsif ($target eq 'modified') { 487: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 488: $safeeval,'index','derivativeorder', 489: 'xinitial','xinitiallabel','xfinal','xfinallabel', 490: 'minimumlength','maximumlength', 491: 'relationship','value','percenterror'); 492: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 493: } 494: return $result; 495: } 496: 497: sub end_functionplotrule { 498: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 499: my $result=''; 500: if ($target eq 'edit') { 501: $result=&Apache::edit::end_table(); 502: } 503: return $result; 504: } 505: 506: 507: # 508: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> 509: # 510: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them 511: # 512: sub start_spline { 513: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 514: my $result=''; 515: if ($target eq 'web') { 516: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 517: $Apache::functionplotresponse::counter++; 518: if ($label=~/\W/) { 519: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); 520: } 521: $label=~s/\W//gs; 522: unless ($label) { 523: $label='S'.$Apache::functionplotresponse::counter; 524: } else { 525: $label='S'.$label; 526: } 527: if ($Apache::functionplotresponse::splineorder{$label}) { 528: &Apache::lonxml::error(&mt('Spline indices must be unique.')); 529: } 530: 531: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); 532: if ($order<2) { $order=2; } 533: if ($order>8) { $order=8; } 534: $Apache::functionplotresponse::splineorder{$label}=$order; 535: 536: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval); 537: unless ($x) { $x=0; } 538: $Apache::functionplotresponse::splineinitx{$label}=$x; 539: 540: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval); 541: unless ($y) { $y=0; } 542: $Apache::functionplotresponse::splineinity{$label}=$y; 543: 544: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval); 545: unless ($sx) { $sx=$order; } 546: $Apache::functionplotresponse::splinescalex{$label}=$sx; 547: 548: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval); 549: unless ($sy) { $sy=2; } 550: $Apache::functionplotresponse::splinescaley{$label}=$sy; 551: } elsif ($target eq 'edit') { 552: $result=&Apache::edit::tag_start($target,$token,'Spline'). 553: &Apache::edit::text_arg('Index:','index', 554: $token,'4').' '. 555: &Apache::edit::select_arg('Order:','order', 556: ['2','3','4','5','6','7','8','9'],$token).' '. 557: &Apache::edit::text_arg('Initial x-value:','initx', 558: $token,'4').' '. 559: &Apache::edit::text_arg('Initial y-value:','inity', 560: $token,'4').' '. 561: &Apache::edit::text_arg('Scale x:','scalex', 562: $token,'4').' '. 563: &Apache::edit::text_arg('Scale y:','scaley', 564: $token,'4'). 565: &Apache::edit::end_row(); 566: } elsif ($target eq 'modified') { 567: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 568: $safeeval,'index','order','initx','inity', 569: 'scalex','scaley'); 570: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 571: } 572: return $result; 573: } 574: 575: sub end_spline { 576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 577: my $result=''; 578: if ($target eq 'edit') { 579: $result=&Apache::edit::end_table(); 580: } 581: return $result; 582: } 583: 584: sub end_init_script { 585: return (<<ENDENDINIT); 586: } 587: // ]]> 588: </script> 589: ENDENDINIT 590: } 591: 592: # 593: # Storing and restoring spline coordinates from part answers 594: # 595: sub decode_previous_answer { 596: my ($answer)=@_; 597: foreach my $coordinate (split(/\,/,$answer)) { 598: my ($key,$value)=split(/\=/,$coordinate); 599: $Apache::functionplotresponse::previous{$key}=$value; 600: } 601: } 602: 603: sub get_answer_from_form_fields { 604: my ($id)=@_; 605: my $answer=''; 606: my %coords=(); 607: foreach my $field (keys(%env)) { 608: if ($field=~/^form\.HWVAL\_$id/) { 609: $field=~/^form\.(.*)$/; 610: $coords{$1}=$env{$field}; 611: } 612: } 613: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords)))); 614: return ($answer,%coords); 615: } 616: 617: # 618: # The following functions calculate the cubic-hermite splines server-side 619: # 620: 621: sub cubic_hermite { 622: my ($t,$p1,$s1,$p2,$s2)=@_; 623: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 5.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+ 624: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 5.*($t*$t*$t-$t*$t) *($s2-$p2); 625: } 626: 627: # 628: # d/dt(...) 629: # 630: 631: sub ddt_cubic_hermite { 632: my ($t,$p1,$s1,$p2,$s2)=@_; 633: return (6.*$t*$t-6.*$t) *$p1 + 5.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+ 634: (-6.*$t*$t+6.*$t)*$p2 + 5.*(3.*$t*$t-2.*$t) *($s2-$p2); 635: } 636: 637: # 638: # d^2/dt^2(...) 639: # 640: 641: sub d2dt2_cubic_hermite { 642: my ($t,$p1,$s1,$p2,$s2)=@_; 643: return (12.*$t-6.) *$p1 + 5.*(6.*$t-4.)*($s1-$p1)+ 644: (-12.*$t+6.)*$p2 + 5.*(6.*$t-2.)*($s2-$p2); 645: } 646: 647: # 648: # Array index calculation 649: # 650: sub array_index { 651: my ($xmin,$xmax,$x)=@_; 652: if ($x ne '') { 653: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); 654: } else { 655: return undef; 656: } 657: } 658: 659: # 660: # Populate the arrays 661: # 662: 663: sub populate_arrays { 664: my ($id,$xmin,$xmax)=@_; 665: for (my $i=0; $i<=400; $i++) { 666: $Apache::functionplotresponse::actualxval[$i]=undef; 667: $Apache::functionplotresponse::func[$i]=undef; 668: $Apache::functionplotresponse::dfuncdx[$i]=undef; 669: $Apache::functionplotresponse::d2funcd2x[$i]=undef; 670: } 671: unless ($xmax>$xmin) { return 'no_func'; } 672: # Run over all splines in response 673: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { 674: my $xiold=-1; 675: # Run over all points in spline 676: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { 677: my $ni=$i+1; 678: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, 679: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, 680: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'}, 681: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'}); 682: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'}, 683: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, 684: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, 685: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); 686: # Run in small steps over spline parameter 687: for (my $t=0; $t<=1; $t+=0.0001) { 688: my $xreal=&cubic_hermite($t,@xparms); 689: my $xi=&array_index($xmin,$xmax,$xreal); 690: if ($xi<$xiold) { return 'no_func'; } 691: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { 692: if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; } 693: $xiold=$xi; 694: $Apache::functionplotresponse::actualxval[$xi]=$xreal; 695: # Function value 696: my $funcval=&cubic_hermite($t,@yparms); 697: $Apache::functionplotresponse::func[$xi]=$funcval; 698: if (defined($funcval)) { 699: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) { 700: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi; 701: } 702: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) { 703: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi; 704: } 705: } 706: # Chain rule 707: # dy/dx=dy/dt/(dx/dt) 708: my $dxdt=&ddt_cubic_hermite($t,@xparms); 709: if ($dxdt) { 710: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; 711: # Second derivative 712: $Apache::functionplotresponse::d2funcdx2[$xi]= 713: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/ 714: ($dxdt*$dxdt*$dxdt); 715: } 716: } 717: } 718: } 719: } 720: } 721: 722: # 723: # Implementation of <functionplotresponse> 724: # 725: 726: sub start_functionplotresponse { 727: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 728: my $result=''; 729: # To remember the splines - somehow, they need to come last 730: undef %Apache::functionplotresponse::splineorder; 731: undef %Apache::functionplotresponse::splineinitx; 732: undef %Apache::functionplotresponse::splineinity; 733: undef %Apache::functionplotresponse::splinescalex; 734: undef %Apache::functionplotresponse::splinescaley; 735: # Remember input fields, etc 736: undef %Apache::functionplotresponse::previous; 737: $Apache::functionplotresponse::inputfields=''; 738: $Apache::functionplotresponse::counter=0; 739: # Remember rules 740: undef @Apache::functionplotresponse::functionplotrules; 741: # Remember failed rules 742: if ($target eq 'grade') { 743: undef @Apache::functionplotresponse::failedrules; 744: } 745: # Delete previous awards 746: undef $Apache::functionplotresponse::awarddetail; 747: # Part and ID 748: my $partid=$Apache::inputtags::part; 749: my $id=&Apache::response::start_response($parstack,$safeeval); 750: # Internal ID to mark the applet and its coordinates 751: my $internalid = $partid.'_'.$id; 752: # Previous answer 753: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"}); 754: 755: # Parameters of <functionplotresponse> 756: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval); 757: $xmin=(defined($xmin)?$xmin:-10); 758: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval); 759: $xmax=(defined($xmax)?$xmax:10); 760: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval); 761: $ymin=(defined($ymin)?$ymin:-10); 762: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval); 763: $ymax=(defined($ymax)?$ymax:10); 764: if ($xmax<=$xmin) { 765: &Apache::lonxml::warning('Maximum x-value needs to be larger than minimum value.'); 766: $xmax=$xmin+20; 767: } 768: if ($ymax<=$ymin) { 769: &Apache::lonxml::warning('Maximum y-value needs to be larger than minimum value.'); 770: $ymax=$ymin+20; 771: } 772: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 773: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 774: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 775: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval); 776: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval); 777: if ($target eq 'edit') { 778: $result.=&Apache::edit::start_table($token) 779: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>' 780: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 781: .&Apache::edit::deletelist($target,$token).'   ' 782: .&Apache::edit::insertlist($target,$token) 783: .'</span></td>' 784: ."<td> " 785: .&Apache::edit::end_row() 786: .&Apache::edit::start_spanning_row() 787: ."\n"; 788: $result.=&Apache::edit::text_arg('Label x-axis:','xlabel', 789: $token,'6').' '. 790: &Apache::edit::text_arg('Minimum x-value:','xmin', 791: $token,'4').' '. 792: &Apache::edit::text_arg('Maximum x-value:','xmax', 793: $token,'4').' '. 794: &Apache::edit::select_arg('x-axis visible:','xaxisvisible', 795: ['yes','no'],$token).'<br />'. 796: &Apache::edit::text_arg('Label y-axis:','ylabel', 797: $token,'6').' '. 798: &Apache::edit::text_arg('Minimum y-value:','ymin', 799: $token,'4').' '. 800: &Apache::edit::text_arg('Maximum y-value:','ymax', 801: $token,'4').' '. 802: &Apache::edit::select_arg('y-axis visible:','yaxisvisible', 803: ['yes','no'],$token).'<br />'. 804: &Apache::edit::select_arg('Grid visible:','gridvisible', 805: ['yes','no'],$token). 806: &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 807: } elsif ($target eq 'modified') { 808: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 809: $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax', 810: 'xaxisvisible','yaxisvisible','gridvisible'); 811: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 812: 813: } elsif ($target eq 'meta') { 814: $result=&Apache::response::meta_package_write('functionplotresponse'); 815: } elsif (($target eq 'answer') && 816: ($env{'form.answer_output_mode'} ne 'tex') && 817: ($Apache::lonhomework::viewgrades == 'F')) { 818: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser(); 819: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen(); 820: my $start_page = &Apache::loncommon::start_page('Rules Log', undef, 821: {'only_body' => 1, 822: 'bgcolor' => '#FFFFFF', 823: 'js_ready' => 1,}); 824: my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,}); 825: $uname =~s/\W//g; 826: $udom =~s/\W//g; 827: my $function_name = 828: join('_','LONCAPA_scriptvars',$uname,$udom, 829: $env{'form.counter'},$Apache::lonxml::curdepth); 830: my $rules_var ="<script type=\"text/javascript\"> 831: // <![CDATA[ 832: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>". 833: $Apache::functionplotresponse::ruleslog. 834: "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()} 835: // ]]> 836: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />"; 837: &Apache::lonxml::add_script_result($rules_var); 838: } 839: 840: return $result; 841: } 842: 843: sub compare_rel { 844: my ($relationship,$value,$realval,$tol)=@_; 845: # is the real value undefined? 846: unless (defined($realval)) { 847: # the real value is not defined 848: if ($relationship eq 'eq') { 849: if ($value eq 'undef') { 850: return 1; 851: } else { 852: return 0; 853: } 854: } elsif ($relationship eq 'ne') { 855: if ($value eq 'undef') { 856: return 0; 857: } else { 858: return 1; 859: } 860: } else { 861: return 0; 862: } 863: } 864: 865: # is the expected value undefined? 866: if ($value eq 'undef') { 867: # but by now we know that the real value is defined 868: return 0; 869: } 870: 871: # both are defined. 872: if ($relationship eq 'gt') { 873: return ($realval>$value); 874: } elsif ($relationship eq 'ge') { 875: return ($realval>$value-$tol); 876: } elsif ($relationship eq 'lt') { 877: return ($realval<$value); 878: } elsif ($relationship eq 'le') { 879: return ($realval<$value+$tol); 880: } elsif ($relationship eq 'ne') { 881: return (abs($value-$realval)>$tol); 882: } else { 883: return (abs($value-$realval)<$tol); 884: } 885: return 0; 886: } 887: 888: sub addlog { 889: my ($text)=@_; 890: $Apache::functionplotresponse::ruleslog.=$text.'<br />'; 891: } 892: 893: sub actualval { 894: my ($i,$xmin,$xmax)=@_; 895: return $xmin+$i/400.*($xmax-$xmin); 896: } 897: 898: sub functionplotrulecheck { 899: my ($rule,$xmin,$xmax,$ymin,$ymax)=@_; 900: 901: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent) 902: =split(/\:/,$rule); 903: $percent=($percent>0?$percent:5); 904: &addlog("================="); 905: &addlog("Rule $label for ".('function itself','first derivative','second derivative')[$derivative]." $relationship $value"); 906: my $li=0; 907: my $lh=400; 908: 909: # Special case: the upper boundary was not defined 910: # and needs to be set to the value where 911: # the condition is not true anymore => set flag 912: 913: my $findupper=0; 914: if (($xfinal eq '') 915: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) 916: && ($xfinallabel)) { 917: $findupper=1; 918: } 919: 920: # if a hard value is set for the boundaries, it overrides the label 921: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) { 922: $li=&array_index($xmin,$xmax,$xinitial); 923: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li; 924: } 925: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) { 926: $lh=&array_index($xmin,$xmax,$xfinal); 927: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh; 928: } 929: # if the label is defined, use it 930: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) { 931: &addlog("Using lower label $xinitiallabel"); 932: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}; 933: } else { 934: $li=&array_index($xmin,$xmax,$xinitial); 935: } 936: unless ($findupper) { 937: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) { 938: &addlog("Using upper label $xfinallabel"); 939: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1; 940: } else { 941: $lh=&array_index($xmin,$xmax,$xfinal); 942: } 943: } 944: # Basic sanity checks 945: if ($li<0) { $li=0; } 946: if ($lh>400) { $lh=400; } 947: if (($li>$lh) || (!defined($lh))) { 948: $lh=$li; 949: } 950: 951: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=". 952: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))"); 953: if ($findupper) { 954: &addlog("Looking for label $xfinallabel"); 955: } 956: my $tol=$percent*($ymax-$ymin)/100; 957: if ($xmax>$xmin) { 958: if ($derivative==2) { 959: $tol=4.*$tol/($xmax-$xmin); 960: } elsif ($derivative==1) { 961: $tol=2.*$tol/($xmax-$xmin); 962: } 963: } 964: for (my $i=$li; $i<=$lh; $i++) { 965: my $val; 966: if ($derivative==2) { 967: $val=$Apache::functionplotresponse::d2funcdx2[$i]; 968: } elsif ($derivative==1) { 969: $val=$Apache::functionplotresponse::dfuncdx[$i]; 970: } else { 971: $val=$Apache::functionplotresponse::func[$i]; 972: } 973: unless (&compare_rel($relationship,$value,$val,$tol)) { 974: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol"); 975: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)"); 976: if (($findupper) && ($i>$li)) { 977: # check for minimum and maximum lengths 978: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax); 979: if ($minimumlength) { 980: if ($length<$minimumlength) { 981: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength"); 982: return 0; 983: } 984: } 985: if ($maximumlength) { 986: if ($length>$maximumlength) { 987: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength"); 988: return 0; 989: } 990: } 991: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i; 992: &addlog("Rule $label passed, setting label $xfinallabel"); 993: return 1; 994: } else { 995: &addlog("Rule $label failed."); 996: my $hintlabel=$label; 997: $hintlabel=~s/^R//; 998: push(@Apache::functionplotresponse::failedrules,$hintlabel); 999: &addlog("Set hint condition $hintlabel"); 1000: return 0; 1001: } 1002: } 1003: } 1004: &addlog("Rule $label passed."); 1005: return 1; 1006: } 1007: 1008: sub start_functionplotruleset { 1009: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1010: if ($target eq 'edit') { 1011: return &Apache::edit::start_table($token). 1012: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>' 1013: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1014: .&Apache::edit::deletelist($target,$token).'   '. 1015: &Apache::edit::insertlist($target,$token) 1016: .'</span></td>' 1017: ."<td> " 1018: .&Apache::edit::end_row() 1019: .&Apache::edit::start_spanning_row() 1020: ."\n"; 1021: } 1022: } 1023: 1024: sub end_functionplotruleset { 1025: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1026: my $id=$Apache::inputtags::response[-1]; 1027: my $partid=$Apache::inputtags::part; 1028: my $internalid = $partid.'_'.$id; 1029: 1030: if ($target eq 'edit' ) { 1031: return &Apache::edit::end_table(); 1032: } elsif ($target eq 'grade' 1033: && &Apache::response::submitted() 1034: && $Apache::lonhomework::type ne 'exam') { 1035: # 1036: # Actually grade 1037: # 1038: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,-2); 1039: $xmin=(defined($xmin)?$xmin:-10); 1040: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,-2); 1041: $xmax=(defined($xmax)?$xmax:10); 1042: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,-2); 1043: $ymin=(defined($ymin)?$ymin:-10); 1044: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,-2); 1045: $ymax=(defined($ymax)?$ymax:10); 1046: 1047: my $ad=''; 1048: undef %Apache::functionplotresponse::functionplotrulelabels; 1049: $Apache::functionplotresponse::ruleslog=''; 1050: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400; 1051: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0; 1052: if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') { 1053: $ad='NOT_FUNCTION'; 1054: } else { 1055: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ". 1056: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")"); 1057: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ". 1058: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")"); 1059: 1060: # We have a function that we can actually grade, go through the spline rules. 1061: foreach my $rule (@Apache::functionplotresponse::functionplotrules) { 1062: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) { 1063: $ad='INCORRECT'; 1064: last; 1065: } 1066: } 1067: # If it's not wrong, it's correct 1068: unless ($ad) { $ad='EXACT_ANS' }; 1069: } 1070: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules)); 1071: &addlog("Assigned award detail: $ad"); 1072: # Store for later to be assigned at end_functionplotresponse 1073: $Apache::functionplotresponse::awarddetail=$ad; 1074: } 1075: } 1076: 1077: 1078: sub end_functionplotresponse { 1079: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1080: &Apache::response::end_response; 1081: 1082: my $result; 1083: my $id=$Apache::inputtags::response[-1]; 1084: my $partid=$Apache::inputtags::part; 1085: my $internalid = $partid.'_'.$id; 1086: 1087: if ($target eq 'edit') { $result=&Apache::edit::end_table(); } 1088: if ($target eq 'grade' 1089: && &Apache::response::submitted() 1090: && $Apache::lonhomework::type eq 'exam') { 1091: 1092: &Apache::response::scored_response($partid,$id); 1093: 1094: } elsif ($target eq 'grade' 1095: && &Apache::response::submitted() 1096: && $Apache::lonhomework::type ne 'exam') { 1097: my ($response,%coords)=&get_answer_from_form_fields($internalid); 1098: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; 1099: my %previous=&Apache::response::check_for_previous($response,$partid,$id); 1100: # 1101: # Assign grade 1102: # 1103: my $ad=$Apache::functionplotresponse::awarddetail; 1104: # 1105: # Store grading info 1106: # 1107: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; 1108: &Apache::response::handle_previous(\%previous,$ad); 1109: } elsif ($target eq 'web') { 1110: undef @Apache::functionplotresponse::failedrules; 1111: } 1112: return $result; 1113: } 1114: 1115: sub end_functionplotelements { 1116: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1117: my $result=''; 1118: my $id=$Apache::inputtags::response[-1]; 1119: my $partid=$Apache::inputtags::part; 1120: my $internalid = $partid.'_'.$id; 1121: if ($target eq 'edit' ) { 1122: $result=&Apache::edit::end_table(); 1123: } elsif ($target eq 'web') { 1124: # Now is the time to render all of the stored splines 1125: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,-2); 1126: $xmin=(defined($xmin)?$xmin:-10); 1127: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,-2); 1128: $xmax=(defined($xmax)?$xmax:10); 1129: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,-2); 1130: $ymin=(defined($ymin)?$ymin:-10); 1131: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,-2); 1132: $ymax=(defined($ymax)?$ymax:10); 1133: if ($xmax<=$xmin) { 1134: $xmax=$xmin+20; 1135: } 1136: if ($ymax<=$ymin) { 1137: $ymax=$ymin+20; 1138: } 1139: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1140: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax); 1141: } 1142: # close the init script 1143: $result.=&end_init_script(); 1144: # register all splines in this response 1145: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'. 1146: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n"; 1147: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 1148: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'. 1149: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n"; 1150: } 1151: # generate the input fields 1152: $result.=$Apache::functionplotresponse::inputfields; 1153: # actually start the <applet>-tag 1154: $result.=&geogebra_startcode($internalid); 1155: # load the spline bytecode 1156: $result.=&geogebra_spline_program(); 1157: # set default parameters 1158: $result.=&geogebra_default_parameters($internalid); 1159: # close the <applet>-tag 1160: $result.=&geogebra_endcode(); 1161: } 1162: return $result; 1163: } 1164: 1165: sub start_functionplotelements { 1166: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1167: my $result=''; 1168: my $id=$Apache::inputtags::response[-1]; 1169: my $partid=$Apache::inputtags::part; 1170: my $internalid = $partid.'_'.$id; 1171: 1172: if ($target eq 'edit') { 1173: return &Apache::edit::start_table($token). 1174: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>' 1175: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1176: .&Apache::edit::deletelist($target,$token).'   '. 1177: &Apache::edit::insertlist($target,$token) 1178: .'</span></td>' 1179: ."<td> " 1180: .&Apache::edit::end_row() 1181: .&Apache::edit::start_spanning_row() 1182: ."\n"; 1183: } elsif ($target eq 'web') { 1184: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,-2); 1185: $xmin=(defined($xmin)?$xmin:-10); 1186: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,-2); 1187: $xmax=(defined($xmax)?$xmax:10); 1188: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,-2); 1189: $ymin=(defined($ymin)?$ymin:-10); 1190: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,-2); 1191: $ymax=(defined($ymax)?$ymax:10); 1192: if ($xmax<=$xmin) { 1193: $xmax=$xmin+20; 1194: } 1195: if ($ymax<=$ymin) { 1196: $ymax=$ymin+20; 1197: } 1198: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1199: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1200: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 1201: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2); 1202: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2); 1203: 1204: 1205: # paste in the update routine to receive stuff back from the applet 1206: $result.=&update_script($internalid); 1207: # start the initscript for this applet 1208: $result.=&start_init_script($internalid); 1209: # put the axis commands inside 1210: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible); 1211: $result.=&axes_label($internalid,$xlabel,$ylabel); 1212: # init script is left open 1213: } 1214: return $result; 1215: } 1216: 1217: 1; 1218: 1219: __END__ 1220: 1221: =head1 NAME 1222: 1223: Apache::functionplotresponse.pm; 1224: 1225: =head1 SYNOPSIS 1226: 1227: Handles tags associated with accepting function plots. 1228: 1229: This is part of the LearningOnline Network with CAPA project 1230: described at http://www.lon-capa.org. 1231: 1232: =head1 HANDLER SUBROUTINE 1233: 1234: start_functionplotresponse() 1235: 1236: =head1 OTHER SUBROUTINES 1237: 1238: =over 1239: 1240: =item end_functionplotresponse() 1241: 1242: =back 1243: 1244: =cut