loncom/homework/functionplotresponse.pm - view

File: [LON-CAPA] / loncom / homework / functionplotresponse.pm
Revision 1.95: download - view: text, annotated - select for diffs
Wed Feb 29 01:46:52 2012 UTC (12 years, 3 months ago) by www
Branches: MAIN
CVS tags: loncapaMITrelate_1, HEAD

Add some robustness: give warning if labels are used multiple times or before being defined.

1: # LearningOnline Network with CAPA 2: # Functionplot responses 3: # 4: # $Id: functionplotresponse.pm,v 1.95 2012/02/29 01:46:52 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: use Apache::run; 35: use LONCAPA; 36: 37: BEGIN { 38: &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline', 39: 'plotobject','plotvector', 40: 'functionplotvectorrule','functionplotvectorsumrule', 41: 'drawvectorsum', 42: 'functionplotcustomrule', 43: 'functionplotrule','functionplotruleset', 44: 'functionplotelements')); 45: } 46: 47: # 48: # There can be a number of applets on a page, each called ggbApplet_$id, 49: # where $id is the "_"-concatenated part and responseid 50: # 51: 52: sub geogebra_startcode { 53: my ($id,$width,$height)=@_; 54: $width=int(1.*$width); 55: $height=int(1.*$height); 56: unless ($width) { $width=700; } 57: unless ($height) { $height=400; } 58: return (<<ENDSTARTCODE); 59: <applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar" 60: codebase="/adm/geogebra/" width="$width" height="$height" MAYSCRIPT> 61: <param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/> 62: ENDSTARTCODE 63: } 64: 65: sub geogebra_endcode { 66: return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n"; 67: } 68: 69: # 70: # This is the internal GeoGebra bytecode which defines the spline functions 71: # 72: sub geogebra_spline_program { 73: return (<<ENDSPLINEPROGRAM); 74: <param name="ggbBase64" value="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75: ENDSPLINEPROGRAM 76: } 77: 78: # 79: # The standard set of parameters inside <applet> 80: # 81: sub geogebra_default_parameters { 82: my ($id)=@_; 83: return(<<ENDDEFAULTPARAMETERS); 84: <param name="image" value="/adm/lonIcons/lonanim.gif" /> 85: <param name="boxborder" value="false" /> 86: <param name="centerimage" value="true" /> 87: <param name="cache_archive" value="geogebra.jar, geogebra_main.jar, geogebra_gui.jar, geogebra_cas.jar, geogebra_export.jar, geogebra_algos.jar, geogebra_javascript.jar, geogebra_properties.jar, jlatexmath.jar, jlm_cyrillic.jar, jlm_greek.jar" /> 88: <param name="cache_version" value="4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0,4.0.1.0" /> 89: <param name="framePossible" value="false" /> 90: 91: <param name="showResetIcon" value="false" /> 92: <param name="showAnimationButton" value="false" /> 93: <param name="enableRightClick" value="false" /> 94: <param name="errorDialogsActive" value="true" /> 95: <param name="enableLabelDrags" value="false" /> 96: <param name="showMenuBar" value="false" /> 97: <param name="showToolBar" value="false" /> 98: <param name="showToolBarHelp" value="false" /> 99: <param name="showAlgebraInput" value="false" /> 100: <param name="enableShiftDragZoom" value="false" /> 101: <param name="allowRescaling" value="false" /> 102: <param name="enableLabelDrags" value="false" /> 103: <param name="ggbOnInitParam" value="applet_$id" /> 104: ENDDEFAULTPARAMETERS 105: } 106: 107: # 108: # This subroutine is called by LON-CAPA at </problem> 109: # Each applet on the page will call function ggbOnInit when it is done loading 110: # This function in turn will call the respective function registered by start_init_script 111: # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit 112: # 113: 114: sub init_script { 115: if ($#Apache::functionplotresponse::callscripts>=0) { 116: my $script=''; 117: foreach my $id (@Apache::functionplotresponse::callscripts) { 118: $script.="if (param=='applet_$id') { loaded_$id=true; }\n"; 119: } 120: $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)). 121: ") { setTimeout('ggbInitAll()',200) }"; 122: my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts)); 123: return (<<ENDGGBINIT); 124: <script type="text/javascript"> 125: // <![CDATA[ 126: // Function that each applet will call when loaded 127: // It will pass "its" parameter 128: // Set flags for when an applet is loaded, wait till all are loaded, and then some 129: function ggbOnInit(param) { 130: $script 131: } 132: function ggbInitAll() { 133: $calls 134: } 135: // ]]> 136: </script> 137: ENDGGBINIT 138: } 139: } 140: 141: # 142: # Each Geogebra applet is supposed to call this when parameters change 143: # Changes the hidden fields on the web page 144: # 145: sub update_script { 146: my ($id)=@_; 147: return (<<ENDUPDATESCRIPT); 148: <script type="text/javascript"> 149: // <![CDATA[ 150: function updatePointCoordinates_$id(coordinateName) { 151: var x = document.ggbApplet_$id.getXcoord(coordinateName); 152: var y = document.ggbApplet_$id.getYcoord(coordinateName); 153: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x; 154: document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y; 155: } 156: // ]]> 157: </script> 158: ENDUPDATESCRIPT 159: } 160: 161: # 162: # Register the above update-handler for a variable 163: # 164: 165: sub update_register { 166: my ($id,$variable)=@_; 167: return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n"; 168: } 169: 170: # 171: # Set a point coordinate variable 172: # 173: sub set_point_coordinate { 174: my ($id,$variable,$x,$y,$fixed)=@_; 175: my $mult=($fixed?'a*':''); 176: # Get rid of wild exponents, make sure it's a number 177: $x=1.*$x; 178: $y=1.*$y; 179: # GeoGebra does not understand "E" 180: $x=~s/[e|E]/\*10\^/; 181: $x=~s/\+//; 182: $y=~s/[e|E]/\*10\^/; 183: $y=~s/\+//; 184: return (<<ENDSETVARIABLE); 185: document.ggbApplet_$id.evalCommand("a=1"); 186: document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)"); 187: document.ggbApplet_$id.setLabelVisible("$variable",false); 188: ENDSETVARIABLE 189: } 190: 191: # 192: # Set a slope coordinate variable 193: # 194: sub set_slope_coordinate { 195: my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_; 196: my $xvariable=$variable.'x'; 197: my $yvariable=$variable.'y'; 198: my $domain=$xmax-$xmin; 199: my $range=$ymax-$ymin; 200: my $xinterval=$domain/100.; 201: my $yinterval=$range/200.; 202: my $mult=($fixed?'a*':''); 203: return (<<ENDSETSVARIABLE); 204: document.ggbApplet_$id.evalCommand("a=1"); 205: document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]"); 206: document.ggbApplet_$id.setVisible("$xvariable", false); 207: document.ggbApplet_$id.evalCommand("$xvariable=$xrel"); 208: document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]"); 209: document.ggbApplet_$id.setVisible("$yvariable", false); 210: document.ggbApplet_$id.evalCommand("$yvariable=$yrel"); 211: document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))"); 212: document.ggbApplet_$id.setLabelVisible("$variable", false); 213: ENDSETSVARIABLE 214: } 215: 216: # 217: # Input field name for a coordinate variable 218: # 219: 220: sub field_name { 221: my ($id,$variable,$name)=@_; 222: return "HWVAL_$id\_$variable\_$name"; 223: } 224: 225: # 226: # Generate an input field for a coordinate variable 227: # 228: 229: sub generate_input_field { 230: my ($id,$variable,$x,$y)=@_; 231: $Apache::functionplotresponse::inputfields.= 232: "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n". 233: "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n"; 234: } 235: 236: # 237: # Initialize a new point coordinate variable at set a listener on it 238: # 239: sub new_point_coordinate { 240: my ($id,$variable,$x,$y,$fixed)=@_; 241: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 242: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 243: } 244: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 245: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 246: } 247: &generate_input_field($id,$variable,$x,$y); 248: return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable); 249: } 250: 251: # 252: # Initialize a new slope coordinate variable at set a listener on it 253: # 254: sub new_slope_coordinate { 255: my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 256: # 257: # $variable: name of the slope point 258: # $x, $y: coordinates of the slope point 259: # $pointname: name of the associated point point 260: # $xp $yp: coordinates of the point point 261: # 262: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) { 263: $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')}; 264: } 265: if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) { 266: $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')}; 267: } 268: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) { 269: $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')}; 270: } 271: if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) { 272: $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')}; 273: } 274: 275: &generate_input_field($id,$variable,$x,$y); 276: my $xrel=$x-$xp; 277: my $yrel=$y-$yp; 278: return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable); 279: } 280: 281: # 282: # This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem> 283: # It then starts the right headers 284: # 285: sub start_init_script { 286: my ($id)=@_; 287: # Add id to the list of ggbInit_$id functions that need to be called 288: push(@Apache::functionplotresponse::callscripts,$id); 289: # ... and open this function 290: return (<<ENDSTARTINIT); 291: <script type="text/javascript"> 292: // <![CDATA[ 293: // variable that will eventually be passed back to the server 294: var coordinateMap_$id = []; 295: // flag for not loaded yet 296: var loaded_$id=false; 297: // Init-function for applet 298: function ggbInit_$id() { 299: ENDSTARTINIT 300: } 301: 302: # 303: # This sets the axes inside ggbInit_$id 304: # 305: 306: sub axes_script { 307: my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_; 308: return (<<ENDAXESSCRIPT); 309: // changes (xmin, xmax, ymin, ymax) 310: document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax); 311: 312: // makes the (x,y) axis (in)visible 313: document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible); 314: // makes the grid (in)visible 315: document.ggbApplet_$id.setGridVisible($gvisible); 316: ENDAXESSCRIPT 317: } 318: 319: sub axes_label { 320: my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_; 321: unless ($xlabel || $ylabel) { return ''; } 322: my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");'; 323: if ($xlabel) { 324: if (($ymin<0) && ($ymax>0)) { 325: $return.=(<<ENDXAXISLABELSCRIPT); 326: document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)"); 327: document.ggbApplet_$id.setVisible("Xlabel",false); 328: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]"); 329: ENDXAXISLABELSCRIPT 330: } else { 331: $return.=(<<ENDXOFFAXISLABEL); 332: document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]"); 333: document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]"); 334: ENDXOFFAXISLABEL 335: } 336: } 337: if ($ylabel) { 338: if (($xmin<0) && ($xmax>0)) { 339: $return.=(<<ENDYAXISLABELSCRIPT); 340: document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)"); 341: document.ggbApplet_$id.setVisible("Ylabel",false); 342: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]"); 343: ENDYAXISLABELSCRIPT 344: } else { 345: $return.=(<<ENDYOFFAXISLABEL); 346: document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]"); 347: document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]"); 348: ENDYOFFAXISLABEL 349: } 350: } 351: return $return; 352: } 353: 354: # 355: # Subroutine to produce background and answer plots 356: # 357: 358: sub plot_script { 359: my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_; 360: $label=~s/\W//g; 361: if (($label) && ($label!~/^[A-Za-z]/)) { 362: $label='C'.$label; 363: } 364: my $visible=0; 365: if ($label) { 366: $visible="1"; 367: } else { 368: $Apache::functionplotresponse::counter++; 369: $label='C'.$Apache::functionplotresponse::counter; 370: } 371: my $rc=0; 372: my $gc=0; 373: my $bc=0; 374: if ($color) { 375: my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/); 376: $rc=hex($rh); 377: $gc=hex($gh); 378: $bc=hex($bh); 379: } 380: if ($fixed) { 381: return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n". 382: ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n"). 383: ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":''). 384: ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":''); 385: } else { 386: return "document.ggbApplet_$id.evalCommand('y=$function');\n"; 387: } 388: } 389: 390: # 391: # Subroutine to produce objects 392: # 393: 394: sub plotobject_script { 395: my ($id,$label,$x,$y)=@_; 396: unless ($label) { 397: $Apache::functionplotresponse::counter++; 398: $label='O'.$Apache::functionplotresponse::counter; 399: } 400: &generate_input_field($id,$label,$x,$y); 401: return "document.ggbApplet_$id.evalCommand('a=1');\n". 402: "document.ggbApplet_$id.setVisible('a', false);\n". 403: "document.ggbApplet_$id.setLabelVisible('a', false);\n". 404: "document.ggbApplet_$id.evalCommand('$label=a*($x,$y)');\n". 405: "document.ggbApplet_$id.setVisible('$label', true);\n". 406: "document.ggbApplet_$id.setLabelVisible('$label', true);\n"; 407: } 408: 409: # 410: # Subroutine to produce vectors 411: # 412: 413: sub plotvector_script { 414: my ($id,$label,$xs,$ys,$xe,$ye,$xmin,$xmax,$fixed)=@_; 415: unless ($label) { 416: $Apache::functionplotresponse::counter++; 417: $label='V'.$Apache::functionplotresponse::counter; 418: } 419: my $startlabel=$label.'Start'; 420: my $endlabel=$label.'End'; 421: my $pointlabel=$label.'Point'; 422: my $pointx=2.*($xmax-$xmin)+$xmax; 423: my $anglelabel=$label.'Angle'; 424: return 425: &new_point_coordinate($id,$startlabel,$xs,$ys,$fixed). 426: &new_point_coordinate($id,$endlabel,$xe,$ye,$fixed). 427: (<<ENDVECTOR); 428: document.ggbApplet_$id.evalCommand("$label=Vector[$startlabel,$endlabel]"); 429: document.ggbApplet_$id.setLabelVisible("$label",true); 430: document.ggbApplet_$id.setLineThickness("$label",8); 431: document.ggbApplet_$id.evalCommand("$pointlabel=($pointx,y($startlabel))"); 432: document.ggbApplet_$id.evalCommand("$anglelabel=Angle[$pointlabel,$startlabel,$endlabel]"); 433: document.ggbApplet_$id.setLabelVisible("$anglelabel",true); 434: document.ggbApplet_$id.setLabelStyle("$anglelabel",VALUE=2); 435: ENDVECTOR 436: } 437: 438: # 439: # Answer spline display 440: # 441: # points: x,y,slope_x,slope_y 442: 443: sub answer_spline_script { 444: my ($id,@points)=@_; 445: my $order=int(($#points+1)/4); 446: if ($order<2) { $order=2; } 447: if ($order>8) { $order=8; } 448: $Apache::functionplotresponse::counter++; 449: my $label='CSpline'.$Apache::functionplotresponse::counter; 450: my $output='document.ggbApplet_'.$id.'.evalCommand("'.$label.'=Spline'.$order.'['; 451: for (my $i=0;$i<=$#points;$i+=4) { 452: $output.="($points[$i],$points[$i+1]),($points[$i+2],$points[$i+3]),"; 453: } 454: $output=~s/\,$//; 455: $output.=']");'."\n"; 456: for (my $i=2; $i<2*$order; $i+=2) { 457: $output.='document.ggbApplet_'.$id.'.setColor("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",0,170,0);'."\n"; 458: } 459: for (my $i=1; $i<2*$order; $i+=2) { 460: $output.='document.ggbApplet_'.$id.'.setVisible("'.$label.'_'.($i>=10?'{':'').$i.($i>=10?'}':'').'",false);'."\n"; 461: } 462: 463: return $output; 464: } 465: 466: # 467: # Subroutine that generates code for spline $label based on stored information 468: # 469: 470: sub generate_spline { 471: my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_; 472: my $result=''; 473: my $order=$Apache::functionplotresponse::splineorder{$label}; 474: my $x=$Apache::functionplotresponse::splineinitx{$label}; 475: my $y=$Apache::functionplotresponse::splineinity{$label}; 476: my $sx=$Apache::functionplotresponse::splinescalex{$label}; 477: my $sy=$Apache::functionplotresponse::splinescaley{$label}; 478: my @coords=(); 479: foreach my $i (1..$order) { 480: $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed); 481: my $xp=$x; 482: $x+=$sx/(2.*($order-1)); 483: push(@coords,$label.'P'.$i); 484: $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed); 485: $x+=$sx/(2.*($order-1)); 486: push(@coords,$label.'S'.$i); 487: } 488: $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n"; 489: return $result; 490: } 491: 492: # 493: # Object 494: # 495: 496: sub start_plotobject { 497: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 498: my $result=''; 499: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 500: my $x=&Apache::lonxml::get_param('x',$parstack,$safeeval); 501: my $y=&Apache::lonxml::get_param('y',$parstack,$safeeval); 502: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 503: $label=~s/\W//gs; 504: $label=ucfirst($label); 505: unless ($label) { $label="NewObject"; } 506: if ($target eq 'web') { 507: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 508: unless (defined($x)) { $x=$xmin; } 509: unless (defined($y)) { $y=$ymin; } 510: $result.=&plotobject_script($internalid,$label,$x,$y); 511: } elsif ($target eq 'edit') { 512: $result=&Apache::edit::tag_start($target,$token,'Plot Object'). 513: &Apache::edit::text_arg('Label on Plot:','label', 514: $token,'16'). 515: &Apache::edit::text_arg('x:','x', 516: $token,'8'). 517: &Apache::edit::text_arg('y:','y', 518: $token,'8'). 519: &Apache::edit::end_row(); 520: } elsif ($target eq 'modified') { 521: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')}); 522: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','x','y'); 523: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 524: } 525: return $result; 526: } 527: 528: sub end_plotobject { 529: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 530: my $result=''; 531: if ($target eq 'edit') { 532: $result=&Apache::edit::end_table(); 533: } 534: return $result; 535: } 536: 537: # 538: # Vector 539: # 540: 541: sub start_plotvector { 542: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 543: my $result=''; 544: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 545: my $tailx=&Apache::lonxml::get_param('tailx',$parstack,$safeeval); 546: my $taily=&Apache::lonxml::get_param('taily',$parstack,$safeeval); 547: my $tipx=&Apache::lonxml::get_param('tipx',$parstack,$safeeval); 548: my $tipy=&Apache::lonxml::get_param('tipy',$parstack,$safeeval); 549: 550: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 551: $label=~s/\W//gs; 552: $label=ucfirst($label); 553: unless ($label) { $label="NewVector"; } 554: if ($Apache::functionplotresponse::vectorlabels{$label}) { 555: &Apache::lonxml::warning(&mt('Vector labels must be unique: [_1]',$label)); 556: } 557: $Apache::functionplotresponse::vectorlabels{$label}=1; 558: if ($target eq 'web') { 559: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 560: unless (defined($tailx)) { $tailx=$xmin; } 561: unless (defined($taily)) { $taily=$ymin; } 562: unless (defined($tipx)) { $tipx=$xmin; } 563: unless (defined($tipy)) { $tipy=$ymin; } 564: my $fixed=0; 565: if ((&Apache::response::show_answer()) || (&Apache::response::check_status()>=2)) { $fixed=1; } 566: $result.=&plotvector_script($internalid,$label,$tailx,$taily,$tipx,$tipy,$xmin,$xmax,$fixed); 567: } elsif ($target eq 'edit') { 568: $result=&Apache::edit::tag_start($target,$token,'Plot Vector'). 569: &Apache::edit::text_arg('Label on Plot:','label', 570: $token,'16'). 571: &Apache::edit::text_arg('Tail x:','tailx', 572: $token,'8'). 573: &Apache::edit::text_arg('Tail y:','taily', 574: $token,'8'). 575: &Apache::edit::text_arg('Tip x:','tipx', 576: $token,'8'). 577: &Apache::edit::text_arg('Tip y:','tipy', 578: $token,'8'). 579: 580: &Apache::edit::end_row(); 581: } elsif ($target eq 'modified') { 582: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')}); 583: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','tailx','taily','tipx','tipy'); 584: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 585: } 586: return $result; 587: } 588: 589: sub end_plotvector { 590: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 591: my $result=''; 592: if ($target eq 'edit') { 593: $result=&Apache::edit::end_table(); 594: } 595: return $result; 596: } 597: 598: 599: # 600: # Vector sum - have GeoGebra draw a sum of specified vectors to help students draw 601: # 602: 603: sub start_drawvectorsum { 604: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 605: my $result=''; 606: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 607: my $tailx=&Apache::lonxml::get_param('tailx',$parstack,$safeeval); 608: my $taily=&Apache::lonxml::get_param('taily',$parstack,$safeeval); 609: my $showvalue=&Apache::lonxml::get_param('showvalue',$parstack,$safeeval); 610: my $vectorlist=&Apache::lonxml::get_param('vectorlist',$parstack,$safeeval); 611: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 612: $label=~s/\W//gs; 613: $label=ucfirst($label); 614: unless ($label) { $label="NewVector"; } 615: if ($target eq 'web') { 616: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 617: unless (defined($tailx)) { $tailx=$xmin; } 618: unless (defined($taily)) { $taily=$ymin; } 619: unless (defined($vectorlist)) { $vectorlist=''; } 620: my @vectors=split(/\,/,$vectorlist); 621: if ($#vectors>0) { 622: my @sumx=(); 623: my @sumy=(); 624: foreach my $thisvector (@vectors) { 625: $thisvector=~s/\W//gs; 626: $thisvector=ucfirst($thisvector); 627: unless ($thisvector) { next; } 628: unless ($Apache::functionplotresponse::vectorlabels{$thisvector}) { 629: &Apache::lonxml::warning(&mt('Vectors must be defined before using them for drawing vector sums: [_1]',$thisvector)); 630: next; 631: } 632: my $vectorx=$thisvector.'X'; 633: my $vectory=$thisvector.'Y'; 634: $result.=(<<ENDADDVEC); 635: document.ggbApplet_$internalid.evalCommand("$vectorx=x($thisvector)"); 636: document.ggbApplet_$internalid.evalCommand("$vectory=y($thisvector)"); 637: document.ggbApplet_$internalid.evalCommand("Include$thisvector$label=Checkbox[]"); 638: ENDADDVEC 639: push(@sumx,"If[Include$thisvector$label,$vectorx,0]"); 640: push(@sumy,"If[Include$thisvector$label,$vectory,0]"); 641: } 642: $result.="document.ggbApplet_$internalid.evalCommand(".'"'."xTot$label=".join('+',@sumx).'");'."\n"; 643: $result.="document.ggbApplet_$internalid.evalCommand(".'"'."yTot$label=".join('+',@sumy).'");'."\n"; 644: my $show=0; 645: if ($showvalue=~/yes/i) { 646: $show=1; 647: } 648: $result.=(<<ENDMAKEVECTOR); 649: document.ggbApplet_$internalid.evalCommand("$label=Vector[($tailx,$taily),($tailx+xTot$label,$taily+yTot$label)]"); 650: document.ggbApplet_$internalid.setLabelVisible("$label",true); 651: document.ggbApplet_$internalid.setLineThickness("$label",8); 652: document.ggbApplet_$internalid.setColor("$label",255,0,0); 653: document.ggbApplet_$internalid.setLabelStyle("$label",VALUE=$show); 654: ENDMAKEVECTOR 655: } 656: } elsif ($target eq 'edit') { 657: $result=&Apache::edit::tag_start($target,$token,'Draw Vector Sum'). 658: &Apache::edit::text_arg('Label on Plot:','label', 659: $token,'16'). 660: &Apache::edit::text_arg('Tail x:','tailx', 661: $token,'8'). 662: &Apache::edit::text_arg('Tail y:','taily', 663: $token,'8'). 664: &Apache::edit::select_arg('Show Value:','showvalue', 665: ['yes','no'],$token).'<br />'. 666: &Apache::edit::text_arg('Vector List:','vectorlist', 667: $token,'40'). 668: &Apache::edit::end_row(); 669: } elsif ($target eq 'modified') { 670: $env{'form.'.&Apache::edit::html_element_name('label')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('label')}); 671: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'label','tailx','taily','showvalue','vectorlist'); 672: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 673: } 674: return $result; 675: } 676: 677: 678: sub end_drawvectorsum { 679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 680: my $result=''; 681: if ($target eq 'edit') { 682: $result=&Apache::edit::end_table(); 683: } 684: return $result; 685: } 686: 687: 688: 689: # 690: # <backgroundplot function="..." fixed="yes/no" /> 691: # 692: sub start_backgroundplot { 693: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 694: my $result=''; 695: my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1]; 696: my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval); 697: my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval); 698: my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval); 699: my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval); 700: my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval); 701: $color=~s/[^a-fA-F0-9]//gs; 702: unless (length($color)==6) { $color=''; } 703: my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0); 704: 705: unless ($function) { $function="0"; } 706: if ($target eq 'web') { 707: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3); 708: unless (defined($xinitial)) { $xinitial=$xmin; } 709: unless (defined($xfinal)) { $xfinal=$xmax; } 710: $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal); 711: } elsif ($target eq 'edit') { 712: $result=&Apache::edit::tag_start($target,$token,'Background Function Plot'). 713: &Apache::edit::text_arg('Function:','function', 714: $token,'16'). 715: &Apache::edit::text_arg('Initial x-value (optional):','xinitial', 716: $token,'8'). 717: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 718: $token,'8'). 719: &Apache::edit::text_arg('Label on Plot:','label', 720: $token,'8'). 721: &Apache::edit::text_arg('Color (hex code):','color', 722: $token,'8'). 723: &Apache::edit::select_arg('Fixed location:','fixed', 724: ['yes','no'],$token). 725: &Apache::edit::end_row(); 726: } elsif ($target eq 'modified') { 727: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 728: $safeeval,'function','label','xinitial','xfinal','color','fixed'); 729: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 730: } 731: return $result; 732: } 733: 734: sub end_backgroundplot { 735: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 736: my $result=''; 737: if ($target eq 'edit') { 738: $result=&Apache::edit::end_table(); 739: } 740: return $result; 741: } 742: 743: # 744: # <functionplotrule ... /> 745: # 746: sub start_functionplotrule { 747: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 748: my $result=''; 749: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 750: $Apache::functionplotresponse::counter++; 751: if ($label=~/\W/) { 752: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 753: } 754: $label=~s/\W//gs; 755: unless ($label) { 756: $label='R'.$Apache::functionplotresponse::counter; 757: } else { 758: $label='R'.$label; 759: } 760: 761: if ($target eq 'grade') { 762: # Simply remember - in order - for later 763: my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval); 764: my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval); 765: if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) { 766: &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.')); 767: } 768: $beginninglabel=~s/\W//gs; 769: $endinglabel=~s/\W//gs; 770: my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval); 771: $relationship=~s/\W//gs; 772: $relationship=lc($relationship); 773: unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) { 774: &Apache::lonxml::warning(&mt('Rule relationship not defined.')); 775: $relationship='eq'; 776: } 777: my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval); 778: unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) { 779: &Apache::lonxml::warning(&mt('Rule derivative not defined.')); 780: $derivative=0; 781: } 782: push(@Apache::functionplotresponse::functionplotrules,join(':',( 783: $label, 784: $derivative, 785: &Apache::lonxml::get_param('xinitial',$parstack,$safeeval), 786: $beginninglabel, 787: &Apache::lonxml::get_param('xfinal',$parstack,$safeeval), 788: $endinglabel, 789: &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval), 790: &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval), 791: $relationship, 792: &Apache::lonxml::get_param('value',$parstack,$safeeval), 793: &Apache::lonxml::get_param('percenterror',$parstack,$safeeval) 794: ))); 795: } elsif ($target eq 'edit') { 796: $result=&Apache::edit::tag_start($target,$token,'Function Plot Graph Rule'). 797: &Apache::edit::text_arg('Index/Name:','index', 798: $token,'10').' '. 799: &Apache::edit::select_arg(&mt('Function:'),'derivativeorder', 800: [['0','Function itself'], 801: ['1','First derivative'], 802: ['2','Second derivative'], 803: ['-1','Integral']],$token).'<br />'. 804: &Apache::edit::text_arg('Initial x-value:','xinitial', 805: $token,'8'). 806: &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel', 807: [['start','Start of Plot'], 808: ['end','End of Plot']],$token,'8').'<br />'. 809: 810: &Apache::edit::text_arg('Final x-value (optional):','xfinal', 811: $token,'8'). 812: &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel', 813: [['end','End of Plot']],$token,'8').'<br />'. 814: &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength', 815: $token,'8'). 816: &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength', 817: $token,'8').'<br />'. 818: &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship', 819: [['eq','equal'], 820: ['ne','not equal'], 821: ['ge','greater than or equal'], 822: ['gt','greater than'], 823: ['lt','less than'], 824: ['le','less than or equal']],$token). 825: $result.= &Apache::edit::select_or_text_arg('Value:','value', 826: [['undef','not defined']],$token,'30'). 827: &Apache::edit::text_arg('Percent error:','percenterror', 828: $token,'8'). 829: &Apache::edit::end_row(); 830: } elsif ($target eq 'modified') { 831: if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) { 832: $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}=''; 833: } 834: if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) { 835: $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}=''; 836: } 837: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 838: $safeeval,'index','derivativeorder', 839: 'xinitial','xinitiallabel','xfinal','xfinallabel', 840: 'minimumlength','maximumlength', 841: 'relationship','value','percenterror'); 842: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 843: } 844: return $result; 845: } 846: 847: sub end_functionplotrule { 848: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 849: my $result=''; 850: if ($target eq 'edit') { 851: $result=&Apache::edit::end_table(); 852: } 853: return $result; 854: } 855: 856: 857: # 858: # <functionplotvectorrule ... /> 859: # 860: sub start_functionplotvectorrule { 861: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 862: my $result=''; 863: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 864: $Apache::functionplotresponse::counter++; 865: if ($label=~/\W/) { 866: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 867: } 868: $label=~s/\W//gs; 869: unless ($label) { 870: $label='R'.$Apache::functionplotresponse::counter; 871: } else { 872: $label='R'.$label; 873: } 874: 875: if ($target eq 'grade') { 876: # Simply remember - in order - for later 877: 878: my $id=$Apache::inputtags::response[-1]; 879: my $partid=$Apache::inputtags::part; 880: my $internalid = $partid.'_'.$id; 881: 882: my $vector=&Apache::lonxml::get_param('vector',$parstack,$safeeval); 883: $vector=~s/\W//gs; 884: $vector=ucfirst($vector); 885: 886: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',( 887: $label, 888: 'vector', 889: $internalid, 890: $vector, 891: &Apache::lonxml::get_param('attachpoint',$parstack,$safeeval), 892: &Apache::lonxml::get_param('notattachpoint',$parstack,$safeeval), 893: &Apache::lonxml::get_param('tailpoint',$parstack,$safeeval), 894: &Apache::lonxml::get_param('tippoint',$parstack,$safeeval), 895: &Apache::lonxml::get_param('nottailpoint',$parstack,$safeeval), 896: &Apache::lonxml::get_param('nottippoint',$parstack,$safeeval), 897: &Apache::lonxml::get_param('length',$parstack,$safeeval), 898: &Apache::lonxml::get_param('angle',$parstack,$safeeval), 899: &Apache::lonxml::get_param('lengtherror',$parstack,$safeeval), 900: &Apache::lonxml::get_param('angleerror',$parstack,$safeeval), 901: ))); 902: } elsif ($target eq 'edit') { 903: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Rule'). 904: &Apache::edit::text_arg('Index/Name:','index', 905: $token,'10').' '. 906: &Apache::edit::text_arg('Vector:','vector', 907: $token,'16').'<br />'. 908: &Apache::edit::text_arg('Attached to object:','attachpoint', 909: $token,'16'). 910: &Apache::edit::text_arg('Not attached to object:','notattachpoint', 911: $token,'16').'<br />'. 912: &Apache::edit::text_arg('Tail attached to object:','tailpoint', 913: $token,'16'). 914: &Apache::edit::text_arg('Tip attached to object:','tippoint', 915: $token,'16'). 916: &Apache::edit::text_arg('Tail not attached to object:','nottailpoint', 917: $token,'16'). 918: &Apache::edit::text_arg('Tip not attached to object:','nottippoint', 919: $token,'16').'<br />'. 920: &Apache::edit::text_arg('Length:','length', 921: $token,'30'). 922: &Apache::edit::text_arg('Absolute error length:','lengtherror', 923: $token,'8').'<br />'. 924: &Apache::edit::text_arg('Angle:','angle', 925: $token,'30'). 926: &Apache::edit::text_arg('Absolute error angle:','angleerror', 927: $token,'8'). 928: &Apache::edit::end_row(); 929: } elsif ($target eq 'modified') { 930: $env{'form.'.&Apache::edit::html_element_name('vector')}=ucfirst($env{'form.'.&Apache::edit::html_element_name('vector')}); 931: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 932: $safeeval,'index','vector','attachpoint','notattachpoint', 933: 'tailpoint','tippoint','nottailpoint','nottipoint', 934: 'length','angle', 935: 'lengtherror','angleerror'); 936: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 937: } 938: return $result; 939: } 940: 941: sub end_functionplotvectorrule { 942: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 943: my $result=''; 944: if ($target eq 'edit') { 945: $result=&Apache::edit::end_table(); 946: } 947: return $result; 948: } 949: 950: # 951: # <functionplotvectorsumrule ... /> 952: # 953: sub start_functionplotvectorsumrule { 954: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 955: my $result=''; 956: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 957: $Apache::functionplotresponse::counter++; 958: if ($label=~/\W/) { 959: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 960: } 961: $label=~s/\W//gs; 962: unless ($label) { 963: $label='R'.$Apache::functionplotresponse::counter; 964: } else { 965: $label='R'.$label; 966: } 967: if ($target eq 'grade') { 968: # Simply remember - in order - for later 969: my $id=$Apache::inputtags::response[-1]; 970: my $partid=$Apache::inputtags::part; 971: my $internalid = $partid.'_'.$id; 972: my $vectors=&Apache::lonxml::get_param('vectors',$parstack,$safeeval); 973: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',( 974: $label, 975: 'sum', 976: $internalid, 977: $vectors, 978: &Apache::lonxml::get_param('length',$parstack,$safeeval), 979: &Apache::lonxml::get_param('angle',$parstack,$safeeval), 980: &Apache::lonxml::get_param('lengtherror',$parstack,$safeeval), 981: &Apache::lonxml::get_param('angleerror',$parstack,$safeeval), 982: ))); 983: } elsif ($target eq 'edit') { 984: $result=&Apache::edit::tag_start($target,$token,'Function Plot Vector Sum Rule'). 985: &Apache::edit::text_arg('Index/Name:','index', 986: $token,'10').' '. 987: &Apache::edit::text_arg('Comma-separated list of vectors:','vectors', 988: $token,'30').'<br />'. 989: &Apache::edit::text_arg('Sum vector length:','length', 990: $token,'30'). 991: &Apache::edit::text_arg('Absolute error length:','lengtherror', 992: $token,'8').'<br />'. 993: &Apache::edit::text_arg('Sum vector angle:','angle', 994: $token,'30'). 995: &Apache::edit::text_arg('Absolute error angle:','angleerror', 996: $token,'8'). 997: &Apache::edit::end_row(); 998: } elsif ($target eq 'modified') { 999: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 1000: $safeeval,'index','vectors', 1001: 'length','angle', 1002: 'lengtherror','angleerror'); 1003: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 1004: } 1005: return $result; 1006: } 1007: 1008: sub end_functionplotvectorsumrule { 1009: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1010: my $result=''; 1011: if ($target eq 'edit') { 1012: $result=&Apache::edit::end_table(); 1013: } 1014: return $result; 1015: } 1016: 1017: # 1018: # <functionplotcustom ... /> 1019: # 1020: sub start_functionplotcustomrule { 1021: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1022: my $result=''; 1023: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 1024: $Apache::functionplotresponse::counter++; 1025: if ($label=~/\W/) { 1026: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 1027: } 1028: $label=~s/\W//gs; 1029: unless ($label) { 1030: $label='R'.$Apache::functionplotresponse::counter; 1031: } else { 1032: $label='R'.$label; 1033: } 1034: &Apache::lonxml::register('Apache::response',('answer')); 1035: if ($target eq 'edit') { 1036: $result=&Apache::edit::tag_start($target,$token,'Function Plot Custom Rule'). 1037: &Apache::edit::text_arg('Index/Name:','index',$token,'10'). 1038: &Apache::edit::end_row(); 1039: } elsif ($target eq 'modified') { 1040: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'index'); 1041: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 1042: } 1043: return $result; 1044: } 1045: 1046: sub end_functionplotcustomrule { 1047: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1048: my $result=''; 1049: if ($target eq 'edit') { 1050: $result=&Apache::edit::end_table(); 1051: } elsif ($target eq 'grade') { 1052: # Simply remember - in order - for later 1053: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 1054: $Apache::functionplotresponse::counter++; 1055: if ($label=~/\W/) { 1056: &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.')); 1057: } 1058: $label=~s/\W//gs; 1059: unless ($label) { 1060: $label='R'.$Apache::functionplotresponse::counter; 1061: } else { 1062: $label='R'.$label; 1063: } 1064: push(@Apache::functionplotresponse::functionplotvectorrules,join(':',( 1065: $label, 1066: 'custom', 1067: &escape($Apache::response::custom_answer[-1]) 1068: ))); 1069: } 1070: &Apache::lonxml::deregister('Apache::response',('answer')); 1071: return $result; 1072: } 1073: 1074: 1075: 1076: # 1077: # <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." /> 1078: # 1079: # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them 1080: # 1081: sub start_spline { 1082: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1083: my $result=''; 1084: if ($target eq 'web') { 1085: my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval); 1086: $Apache::functionplotresponse::counter++; 1087: if ($label=~/\W/) { 1088: &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.')); 1089: } 1090: $label=~s/\W//gs; 1091: unless ($label) { 1092: $label='S'.$Apache::functionplotresponse::counter; 1093: } else { 1094: $label='S'.$label; 1095: } 1096: if ($Apache::functionplotresponse::splineorder{$label}) { 1097: &Apache::lonxml::error(&mt('Spline indices must be unique.')); 1098: } 1099: 1100: my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval); 1101: if ($order<2) { $order=2; } 1102: if ($order>8) { $order=8; } 1103: $Apache::functionplotresponse::splineorder{$label}=$order; 1104: 1105: my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval); 1106: unless ($x) { $x=0; } 1107: $Apache::functionplotresponse::splineinitx{$label}=$x; 1108: 1109: my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval); 1110: unless ($y) { $y=0; } 1111: $Apache::functionplotresponse::splineinity{$label}=$y; 1112: 1113: my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval); 1114: unless ($sx) { $sx=$order; } 1115: $Apache::functionplotresponse::splinescalex{$label}=$sx; 1116: 1117: my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval); 1118: unless ($sy) { $sy=2; } 1119: $Apache::functionplotresponse::splinescaley{$label}=$sy; 1120: } elsif ($target eq 'edit') { 1121: $result=&Apache::edit::tag_start($target,$token,'Spline'). 1122: &Apache::edit::text_arg('Index:','index', 1123: $token,'4').' '. 1124: &Apache::edit::select_arg('Order:','order', 1125: ['2','3','4','5','6','7','8'],$token).' '. 1126: &Apache::edit::text_arg('Initial x-value:','initx', 1127: $token,'4').' '. 1128: &Apache::edit::text_arg('Initial y-value:','inity', 1129: $token,'4').' '. 1130: &Apache::edit::text_arg('Scale x:','scalex', 1131: $token,'4').' '. 1132: &Apache::edit::text_arg('Scale y:','scaley', 1133: $token,'4'). 1134: &Apache::edit::end_row(); 1135: } elsif ($target eq 'modified') { 1136: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 1137: $safeeval,'index','order','initx','inity', 1138: 'scalex','scaley'); 1139: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); } 1140: } 1141: return $result; 1142: } 1143: 1144: sub end_spline { 1145: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1146: my $result=''; 1147: if ($target eq 'edit') { 1148: $result=&Apache::edit::end_table(); 1149: } 1150: return $result; 1151: } 1152: 1153: sub end_init_script { 1154: return (<<ENDENDINIT); 1155: } 1156: // ]]> 1157: </script> 1158: ENDENDINIT 1159: } 1160: 1161: # 1162: # Storing and restoring spline coordinates from part answers 1163: # 1164: sub decode_previous_answer { 1165: my ($answer)=@_; 1166: foreach my $coordinate (split(/\,/,$answer)) { 1167: my ($key,$value)=split(/\=/,$coordinate); 1168: $Apache::functionplotresponse::previous{$key}=$value; 1169: } 1170: } 1171: 1172: sub get_answer_from_form_fields { 1173: my ($id)=@_; 1174: my $answer=''; 1175: my %coords=(); 1176: foreach my $field (keys(%env)) { 1177: if ($field=~/^form\.HWVAL\_$id/) { 1178: $field=~/^form\.(.*)$/; 1179: $coords{$1}=$env{$field}; 1180: } 1181: } 1182: $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords)))); 1183: return ($answer,%coords); 1184: } 1185: 1186: # 1187: # The following functions calculate the cubic-hermite splines server-side 1188: # 1189: 1190: sub cubic_hermite { 1191: my ($t,$p1,$s1,$p2,$s2)=@_; 1192: return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+ 1193: (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2); 1194: } 1195: 1196: # 1197: # d/dt(...) 1198: # 1199: 1200: sub ddt_cubic_hermite { 1201: my ($t,$p1,$s1,$p2,$s2)=@_; 1202: return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+ 1203: (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2); 1204: } 1205: 1206: # 1207: # d^2/dt^2(...) 1208: # 1209: 1210: sub d2dt2_cubic_hermite { 1211: my ($t,$p1,$s1,$p2,$s2)=@_; 1212: return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+ 1213: (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2); 1214: } 1215: 1216: # 1217: # Array index calculation 1218: # 1219: sub array_index { 1220: my ($xmin,$xmax,$x)=@_; 1221: if ($x ne '') { 1222: return int(($x-$xmin)/($xmax-$xmin)*400.+0.5); 1223: } else { 1224: return undef; 1225: } 1226: } 1227: 1228: # 1229: # Populate the arrays 1230: # 1231: 1232: sub populate_arrays { 1233: my ($id,$xmin,$xmax,$ymin,$ymax)=@_; 1234: for (my $i=0; $i<=400; $i++) { 1235: $Apache::functionplotresponse::actualxval[$i]=undef; 1236: $Apache::functionplotresponse::func[$i]=undef; 1237: $Apache::functionplotresponse::dfuncdx[$i]=undef; 1238: $Apache::functionplotresponse::d2funcd2x[$i]=undef; 1239: } 1240: unless ($xmax>$xmin) { return 'no_func'; } 1241: # Run over all splines in response 1242: foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) { 1243: my $xiold=-1; 1244: # Run over all points in spline 1245: for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) { 1246: my $ni=$i+1; 1247: my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'}, 1248: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'}, 1249: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'}, 1250: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'}); 1251: my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'}, 1252: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'}, 1253: $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'}, 1254: $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'}); 1255: # Run in small steps over spline parameter 1256: for (my $t=0; $t<=1; $t+=0.0001) { 1257: my $xreal=&cubic_hermite($t,@xparms); 1258: my $xi=&array_index($xmin,$xmax,$xreal); 1259: if ($xi<$xiold) { return 'no_func'; } 1260: if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) { 1261: $xiold=$xi; 1262: $Apache::functionplotresponse::actualxval[$xi]=$xreal; 1263: # Function value 1264: my $funcval=&cubic_hermite($t,@yparms); 1265: 1266: # Do we already have a value for this point, and is it different from the new one? 1267: if ((defined($Apache::functionplotresponse::func[$xi])) && 1268: (abs($Apache::functionplotresponse::func[$xi]-$funcval)>($ymax-$ymin)/100.)) { 1269: return 'no_func'; 1270: } 1271: # Okay, remember the new point 1272: $Apache::functionplotresponse::func[$xi]=$funcval; 1273: 1274: if (defined($funcval)) { 1275: if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) { 1276: $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi; 1277: } 1278: if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) { 1279: $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi; 1280: } 1281: } 1282: # Chain rule 1283: # dy/dx=dy/dt/(dx/dt) 1284: my $dxdt=&ddt_cubic_hermite($t,@xparms); 1285: if ($dxdt) { 1286: $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt; 1287: # Second derivative 1288: $Apache::functionplotresponse::d2funcdx2[$xi]= 1289: ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/ 1290: ($dxdt*$dxdt*$dxdt); 1291: } 1292: } 1293: } 1294: } 1295: } 1296: } 1297: 1298: # 1299: # Implementation of <functionplotresponse> 1300: # 1301: 1302: sub start_functionplotresponse { 1303: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1304: my $result=''; 1305: # To remember the splines - somehow, they need to come last 1306: undef %Apache::functionplotresponse::splineorder; 1307: undef %Apache::functionplotresponse::splineinitx; 1308: undef %Apache::functionplotresponse::splineinity; 1309: undef %Apache::functionplotresponse::splinescalex; 1310: undef %Apache::functionplotresponse::splinescaley; 1311: # Remember input fields, etc 1312: undef %Apache::functionplotresponse::previous; 1313: $Apache::functionplotresponse::inputfields=''; 1314: $Apache::functionplotresponse::counter=0; 1315: # Remember vectors 1316: undef %Apache::functionplotresponse::vectorlabels; 1317: # Remember rules 1318: undef @Apache::functionplotresponse::functionplotrules; 1319: undef @Apache::functionplotresponse::functionplotvectorrules; 1320: # Remember failed rules 1321: if ($target eq 'grade') { 1322: undef @Apache::functionplotresponse::failedrules; 1323: } 1324: # Delete previous awards 1325: undef $Apache::functionplotresponse::awarddetail; 1326: # Part and ID 1327: my $partid=$Apache::inputtags::part; 1328: my $id=&Apache::response::start_response($parstack,$safeeval); 1329: # Internal ID to mark the applet and its coordinates 1330: my $internalid = $partid.'_'.$id; 1331: # Previous answer 1332: &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"}); 1333: 1334: # Parameters of <functionplotresponse> 1335: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval); 1336: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 1337: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 1338: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false'); 1339: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval); 1340: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval); 1341: if ($target eq 'edit') { 1342: $result.=&Apache::edit::start_table($token) 1343: .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>' 1344: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1345: .&Apache::edit::deletelist($target,$token).'   ' 1346: .&Apache::edit::insertlist($target,$token).'   ' 1347: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses') 1348: .'</span></td>' 1349: ."<td> " 1350: .&Apache::edit::end_row() 1351: .&Apache::edit::start_spanning_row() 1352: ."\n"; 1353: $result.=&Apache::edit::text_arg('Width (pixels):','width', 1354: $token,'6').' '. 1355: &Apache::edit::text_arg('Height (pixels):','height', 1356: $token,'6').'<br />'. 1357: &Apache::edit::text_arg('Label x-axis:','xlabel', 1358: $token,'6').' '. 1359: &Apache::edit::text_arg('Minimum x-value:','xmin', 1360: $token,'4').' '. 1361: &Apache::edit::text_arg('Maximum x-value:','xmax', 1362: $token,'4').' '. 1363: &Apache::edit::select_arg('x-axis visible:','xaxisvisible', 1364: ['yes','no'],$token).'<br />'. 1365: &Apache::edit::text_arg('Label y-axis:','ylabel', 1366: $token,'6').' '. 1367: &Apache::edit::text_arg('Minimum y-value:','ymin', 1368: $token,'4').' '. 1369: &Apache::edit::text_arg('Maximum y-value:','ymax', 1370: $token,'4').' '. 1371: &Apache::edit::select_arg('y-axis visible:','yaxisvisible', 1372: ['yes','no'],$token).'<br />'. 1373: &Apache::edit::select_arg('Grid visible:','gridvisible', 1374: ['yes','no'],$token).'<br />'. 1375: &Apache::edit::text_arg('Background plot(s) for answer (function(x):xmin:xmax,function(x):xmin:xmax,x1:y1:sx1:sy1:x2:y2:sx2:sy2,...):', 1376: 'answerdisplay',$token,'50'). 1377: &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 1378: } elsif ($target eq 'modified') { 1379: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 1380: $safeeval,'width','height','xlabel','xmin','xmax','ylabel','ymin','ymax', 1381: 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay'); 1382: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 1383: 1384: } elsif ($target eq 'meta') { 1385: $result=&Apache::response::meta_package_write('functionplotresponse'); 1386: } elsif (($target eq 'answer') && 1387: ($env{'form.answer_output_mode'} ne 'tex') && 1388: ($Apache::lonhomework::viewgrades == 'F')) { 1389: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser(); 1390: $uname =~s/\W//g; 1391: $udom =~s/\W//g; 1392: my $function_name = 1393: join('_','LONCAPA_scriptvars',$uname,$udom, 1394: $env{'form.counter'},$Apache::lonxml::curdepth); 1395: &Apache::lonxml::add_script_result( 1396: &Apache::loncommon::modal_adhoc_window($function_name,700,500, 1397: '<pre>'.$Apache::functionplotresponse::ruleslog.'</pre>', 1398: &mt('Rules Log'))."<br />"); 1399: } 1400: return $result; 1401: } 1402: 1403: sub compare_rel { 1404: my ($relationship,$value,$realval,$tol)=@_; 1405: # is the real value undefined? 1406: unless (defined($realval)) { 1407: # the real value is not defined 1408: if ($relationship eq 'eq') { 1409: if ($value eq 'undef') { 1410: return 1; 1411: } else { 1412: return 0; 1413: } 1414: } elsif ($relationship eq 'ne') { 1415: if ($value eq 'undef') { 1416: return 0; 1417: } else { 1418: return 1; 1419: } 1420: } else { 1421: return 0; 1422: } 1423: } 1424: 1425: # is the expected value undefined? 1426: if ($value eq 'undef') { 1427: # but by now we know that the real value is defined 1428: return 0; 1429: } 1430: 1431: # both are defined. 1432: if ($relationship eq 'gt') { 1433: return ($realval>$value); 1434: } elsif ($relationship eq 'ge') { 1435: return ($realval>$value-$tol); 1436: } elsif ($relationship eq 'lt') { 1437: return ($realval<$value); 1438: } elsif ($relationship eq 'le') { 1439: return ($realval<$value+$tol); 1440: } elsif ($relationship eq 'ne') { 1441: return (abs($value-$realval)>$tol); 1442: } else { 1443: return (abs($value-$realval)<$tol); 1444: } 1445: return 0; 1446: } 1447: 1448: sub addlog { 1449: my ($text)=@_; 1450: $text=~s/\'/\\\'/g; 1451: $Apache::functionplotresponse::ruleslog.=$text.'<br />'; 1452: } 1453: 1454: sub actualval { 1455: my ($i,$xmin,$xmax)=@_; 1456: return $xmin+$i/400.*($xmax-$xmin); 1457: } 1458: 1459: sub fpr_val { 1460: my ($arg)=@_; 1461: return &actualval($Apache::functionplotresponse::functionplotrulelabels{$arg}, 1462: $Apache::functionplotresponse::fpr_xmin, 1463: $Apache::functionplotresponse::fpr_xmax); 1464: } 1465: 1466: sub fpr_f { 1467: my ($arg)=@_; 1468: return $Apache::functionplotresponse::func[&array_index($Apache::functionplotresponse::fpr_xmin, 1469: $Apache::functionplotresponse::fpr_xmax, 1470: $arg)]; 1471: } 1472: 1473: sub fpr_dfdx { 1474: my ($arg)=@_; 1475: return $Apache::functionplotresponse::dfuncdx[&array_index($Apache::functionplotresponse::fpr_xmin, 1476: $Apache::functionplotresponse::fpr_xmax, 1477: $arg)]; 1478: } 1479: 1480: sub fpr_d2fdx2 { 1481: my ($arg)=@_; 1482: return $Apache::functionplotresponse::d2funcdx2[&array_index($Apache::functionplotresponse::fpr_xmin, 1483: $Apache::functionplotresponse::fpr_xmax, 1484: $arg)]; 1485: } 1486: 1487: sub fpr_vectorcoords { 1488: my ($arg)=@_; 1489: $arg=~s/\W//gs; 1490: $arg=ucfirst($arg); 1491: my $id=$Apache::inputtags::response[-1]; 1492: my $partid=$Apache::inputtags::part; 1493: my $internalid = $partid.'_'.$id; 1494: return ($env{'form.HWVAL_'.$internalid.'_'.$arg.'Start_x'}, 1495: $env{'form.HWVAL_'.$internalid.'_'.$arg.'End_x'}, 1496: $env{'form.HWVAL_'.$internalid.'_'.$arg.'Start_y'}, 1497: $env{'form.HWVAL_'.$internalid.'_'.$arg.'End_y'}); 1498: } 1499: 1500: sub fpr_objectcoords { 1501: my ($arg)=@_; 1502: $arg=~s/\W//gs; 1503: $arg=ucfirst($arg); 1504: my $id=$Apache::inputtags::response[-1]; 1505: my $partid=$Apache::inputtags::part; 1506: my $internalid = $partid.'_'.$id; 1507: return ($env{'form.HWVAL_'.$internalid.'_'.$arg.'_x'}, 1508: $env{'form.HWVAL_'.$internalid.'_'.$arg.'_y'}); 1509: } 1510: 1511: sub fpr_vectorlength { 1512: my ($arg)=@_; 1513: my ($xs,$xe,$ys,$ye)=&fpr_vectorcoords($arg); 1514: return sqrt(($xe-$xs)*($xe-$xs)+($ye-$ys)*($ye-$ys)); 1515: } 1516: 1517: sub fpr_vectorangle { 1518: my ($arg)=@_; 1519: my ($xs,$xe,$ys,$ye)=&fpr_vectorcoords($arg); 1520: my $angle=57.2957795*atan2(($ye-$ys),($xe-$xs)); 1521: if ($angle<0) { $angle=360+$angle; } 1522: return $angle; 1523: } 1524: 1525: sub vectorcoords { 1526: my ($id,$label)=@_; 1527: return ($env{'form.HWVAL_'.$id.'_'.$label.'Start_x'}, 1528: $env{'form.HWVAL_'.$id.'_'.$label.'End_x'}, 1529: $env{'form.HWVAL_'.$id.'_'.$label.'Start_y'}, 1530: $env{'form.HWVAL_'.$id.'_'.$label.'End_y'}); 1531: } 1532: 1533: sub objectcoords { 1534: my ($id,$label)=@_; 1535: return ($env{'form.HWVAL_'.$id.'_'.$label.'_x'}, 1536: $env{'form.HWVAL_'.$id.'_'.$label.'_y'}); 1537: } 1538: 1539: sub attached { 1540: my ($id,$vector,$objects,$xmin,$xmax,$ymin,$ymax)=@_; 1541: my ($xs,$xe,$ys,$ye)=&vectorcoords($id,$vector); 1542: my $tolx=($xmax-$xmin)/100.; 1543: my $toly=($ymax-$ymin)/100.; 1544: my $tail=0; 1545: my $tip=0; 1546: foreach my $obj (split(/\s*\,\s*/,$objects)) { 1547: $obj=~s/\W//g; 1548: unless ($obj) { next; } 1549: $obj=ucfirst($obj); 1550: my ($xo,$yo)=&objectcoords($id,$obj); 1551: &addlog("Proximity $vector ($xs,$ys)-($xe,$ye) to $obj ($xo,$yo)"); 1552: if ((abs($xs-$xo)<$tolx) && (abs($ys-$yo)<$toly)) { 1553: $tail=1; 1554: &addlog("Attached tail: $obj"); 1555: } 1556: if ((abs($xe-$xo)<$tolx) && (abs($ye-$yo)<$toly)) { 1557: $tip=1; 1558: &addlog("Attached tip: $obj"); 1559: } 1560: } 1561: &addlog("Result tail:$tail tip:$tip"); 1562: return($tail,$tip); 1563: } 1564: 1565: 1566: sub vectorangle { 1567: my ($x,$y)=@_; 1568: my $angle=57.2957795*atan2($y,$x); 1569: if ($angle<0) { $angle=360+$angle; } 1570: return $angle; 1571: } 1572: 1573: sub vectorlength { 1574: my ($x,$y)=@_; 1575: return sqrt($x*$x+$y*$y); 1576: } 1577: 1578: sub relvector { 1579: my ($xs,$xe,$ys,$ye)=@_; 1580: return ($xe-$xs,$ye-$ys); 1581: } 1582: 1583: sub plotvectorlength { 1584: return &vectorlength(&relvector(&vectorcoords(@_))); 1585: } 1586: 1587: sub plotvectorangle { 1588: return &vectorangle(&relvector(&vectorcoords(@_))); 1589: } 1590: 1591: 1592: # 1593: # Evaluate a functionplotvectorrule 1594: # 1595: 1596: sub functionplotvectorrulecheck { 1597: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1598: &addlog("================="); 1599: my ($label,$type)=split(/\:/,$rule); 1600: if ($type eq 'vector') { 1601: return &vectorcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval); 1602: } elsif ($type eq 'sum') { 1603: return &sumcheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval); 1604: } elsif ($type eq 'custom') { 1605: return &customcheck($rule,$safeeval); 1606: } 1607: } 1608: 1609: sub vectorcheck { 1610: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1611: my ($label,$type,$id,$vector, 1612: $attachpoint,$notattachpoint, 1613: $tailpoint,$tippoint,$nottailpoint,$nottippoint, 1614: $length,$angle,$lengtherror,$angleerror)=split(/\:/,$rule); 1615: &addlog("Vector Rule $label for vector ".$vector); 1616: if ($length ne '') { 1617: &addlog("Checking for length $length with error $lengtherror"); 1618: $length=&Apache::run::run($length,$safeeval); 1619: &addlog("Length evaluated to $length"); 1620: my $thislength=&plotvectorlength($id,$vector); 1621: &addlog("Found length $thislength"); 1622: if (abs($thislength-$length)>$lengtherror) { 1623: &setfailed($label); 1624: return 0; 1625: } 1626: } 1627: if ($angle ne '') { 1628: &addlog("Checking for angle $angle with error $angleerror"); 1629: $angle=&Apache::run::run($angle,$safeeval); 1630: &addlog("Angle evaluated to $angle"); 1631: my $thisangle=&plotvectorangle($id,$vector); 1632: &addlog("Found angle $thisangle"); 1633: my $anglediff=abs($thisangle-$angle); 1634: &addlog("Angle difference: $anglediff"); 1635: if ($anglediff>360.-$anglediff) { 1636: $anglediff=360.-$anglediff; 1637: } 1638: &addlog("Smallest angle difference: $anglediff"); 1639: if ($anglediff>$angleerror) { 1640: &setfailed($label); 1641: return 0; 1642: } 1643: } 1644: if ($attachpoint ne '') { 1645: &addlog("Checking attached: ".$attachpoint); 1646: my ($tail,$tip)=&attached($id,$vector,$attachpoint,$xmin,$xmax,$ymin,$ymax); 1647: unless ($tail || $tip) { 1648: &setfailed($label); 1649: return 0; 1650: } 1651: } 1652: if ($notattachpoint ne '') { 1653: &addlog("Checking not attached: ".$notattachpoint); 1654: my ($tail,$tip)=&attached($id,$vector,$notattachpoint,$xmin,$xmax,$ymin,$ymax); 1655: if ($tail || $tip) { 1656: &setfailed($label); 1657: return 0; 1658: } 1659: } 1660: if ($tailpoint ne '') { 1661: &addlog("Checking tail: ".$tailpoint); 1662: my ($tail,$tip)=&attached($id,$vector,$tailpoint,$xmin,$xmax,$ymin,$ymax); 1663: unless ($tail) { 1664: &setfailed($label); 1665: return 0; 1666: } 1667: } 1668: if ($nottailpoint ne '') { 1669: &addlog("Checking not tail: ".$nottailpoint); 1670: my ($tail,$tip)=&attached($id,$vector,$nottailpoint,$xmin,$xmax,$ymin,$ymax); 1671: if ($tail) { 1672: &setfailed($label); 1673: return 0; 1674: } 1675: } 1676: if ($tippoint ne '') { 1677: &addlog("Checking tip: ".$tippoint); 1678: my ($tail,$tip)=&attached($id,$vector,$tippoint,$xmin,$xmax,$ymin,$ymax); 1679: unless ($tip) { 1680: &setfailed($label); 1681: return 0; 1682: } 1683: } 1684: if ($nottippoint ne '') { 1685: &addlog("Checking not tip: ".$nottippoint); 1686: my ($tail,$tip)=&attached($id,$vector,$nottippoint,$xmin,$xmax,$ymin,$ymax); 1687: if ($tip) { 1688: &setfailed($label); 1689: return 0; 1690: } 1691: } 1692: 1693: &addlog("Rule $label passed."); 1694: return 1; 1695: } 1696: 1697: sub sumcheck { 1698: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1699: my ($label,$type,$id,$vectors,$length,$angle,$lengtherror,$angleerror)=split(/\:/,$rule); 1700: &addlog("Vector Sum Rule $label for vectors ".$vectors); 1701: my $sumx=0; 1702: my $sumy=0; 1703: foreach my $sv (split(/\s*\,\s*/,$vectors)) { 1704: my ($rx,$ry)=&relvector(&vectorcoords($id,$sv)); 1705: $sumx+=$rx; 1706: $sumy+=$ry; 1707: } 1708: &addlog("Sum vector ($sumx,$sumy)"); 1709: if ($length ne '') { 1710: &addlog("Checking length $length with error $lengtherror"); 1711: $length=&Apache::run::run($length,$safeeval); 1712: &addlog("Evaluated to $length"); 1713: my $thislength=&vectorlength($sumx,$sumy); 1714: &addlog("Actual length $thislength"); 1715: if (abs($length-$thislength)>$lengtherror) { 1716: &setfailed($label); 1717: return 0; 1718: } 1719: } 1720: if ($angle ne '') { 1721: &addlog("Checking angle $angle with error $angleerror"); 1722: $angle=&Apache::run::run($angle,$safeeval); 1723: &addlog("Evaluated to $angle"); 1724: my $thisangle=&vectorangle($sumx,$sumy); 1725: &addlog("Actual angle $thisangle"); 1726: my $anglediff=abs($thisangle-$angle); 1727: &addlog("Angle difference: $anglediff"); 1728: if ($anglediff>360.-$anglediff) { 1729: $anglediff=360.-$anglediff; 1730: } 1731: &addlog("Smallest angle difference: $anglediff"); 1732: if ($anglediff>$angleerror) { 1733: &setfailed($label); 1734: return 0; 1735: } 1736: } 1737: &addlog("Rule $label passed."); 1738: return 1; 1739: } 1740: 1741: sub customcheck { 1742: my ($rule,$safeeval)=@_; 1743: my ($label,$type,$prg)=split(/\:/,$rule); 1744: &addlog("Custom Rule ".$label); 1745: my $result=&Apache::run::run(&unescape($prg),$safeeval); 1746: &addlog("Algorithm returned $result"); 1747: unless ($result) { 1748: &setfailed($label); 1749: return 0; 1750: } 1751: &addlog("Rule $label passed."); 1752: return 1; 1753: } 1754: 1755: # 1756: # Evaluate a functionplotrule 1757: # 1758: 1759: sub functionplotrulecheck { 1760: my ($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)=@_; 1761: 1762: my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent) 1763: =split(/\:/,$rule); 1764: $percent=($percent>0?$percent:5); 1765: &addlog("================="); 1766: &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value"); 1767: # 1768: # Evaluate the value 1769: # 1770: if (($value=~/\D/) && ($value ne 'undef')) { 1771: $Apache::functionplotresponse::fpr_xmin=$xmin; 1772: $Apache::functionplotresponse::fpr_xmax=$xmax; 1773: $value=&Apache::run::run($value,$safeeval); 1774: &addlog("Value evaluated to $value"); 1775: } 1776: 1777: # 1778: # Minimum and maximum lengths of the interval 1779: # 1780: if ((defined($minimumlength)) || (defined($maximumlength))) { 1781: &addlog("Minimumlength $minimumlength Maximumlength $maximumlength"); 1782: } 1783: my $li=0; 1784: my $lh=400; 1785: 1786: # Special case: the upper boundary was not defined 1787: # and needs to be set to the value where 1788: # the condition is not true anymore => set flag 1789: 1790: my $findupper=0; 1791: if (($xfinal eq '') 1792: && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) 1793: && ($xfinallabel)) { 1794: $findupper=1; 1795: } 1796: 1797: # if a hard value is set for the boundaries, it overrides the label 1798: if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) { 1799: $li=&array_index($xmin,$xmax,$xinitial); 1800: $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li; 1801: } 1802: if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) { 1803: $lh=&array_index($xmin,$xmax,$xfinal); 1804: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh; 1805: } 1806: # if the label is defined, use it 1807: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) { 1808: &addlog("Using lower label $xinitiallabel"); 1809: $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}; 1810: } else { 1811: $li=&array_index($xmin,$xmax,$xinitial); 1812: } 1813: unless ($findupper) { 1814: if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) { 1815: &addlog("Using upper label $xfinallabel"); 1816: $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1; 1817: } else { 1818: $lh=&array_index($xmin,$xmax,$xfinal); 1819: } 1820: } 1821: # Basic sanity checks 1822: if ($li<0) { $li=0; } 1823: if ($lh>400) { $lh=400; } 1824: if (($li>$lh) || (!defined($lh))) { 1825: $lh=$li; 1826: } 1827: 1828: &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=". 1829: &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))"); 1830: if ($findupper) { 1831: &addlog("Looking for label $xfinallabel"); 1832: } 1833: my $tol=$percent*($ymax-$ymin)/100; 1834: if ($xmax>$xmin) { 1835: if ($derivative==2) { 1836: $tol=4.*$tol/($xmax-$xmin); 1837: } elsif ($derivative==1) { 1838: $tol=2.*$tol/($xmax-$xmin); 1839: } elsif ($derivative==-1) { 1840: $tol=$tol*($xmax-$xmin)/2.; 1841: } 1842: } 1843: my $integral=0; 1844: my $binwidth=($xmax-$xmin)/400.; 1845: if (($derivative<0) && (!$findupper)) { 1846: # definite integral, calculate over whole length 1847: &addlog("Calculating definite integral"); 1848: for (my $i=$li; $i<=$lh; $i++) { 1849: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1850: } 1851: unless (&compare_rel($relationship,$value,$integral,$tol)) { 1852: &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol"); 1853: &addlog("Rule $label failed."); 1854: &setfailed($label); 1855: return 0; 1856: } 1857: } else { 1858: for (my $i=$li; $i<=$lh; $i++) { 1859: my $val; 1860: if ($derivative==2) { 1861: $val=$Apache::functionplotresponse::d2funcdx2[$i]; 1862: } elsif ($derivative==1) { 1863: $val=$Apache::functionplotresponse::dfuncdx[$i]; 1864: } elsif ($derivative==-1) { 1865: $integral+=$Apache::functionplotresponse::func[$i]*$binwidth; 1866: $val=$integral; 1867: } else { 1868: $val=$Apache::functionplotresponse::func[$i]; 1869: } 1870: unless (&compare_rel($relationship,$value,$val,$tol)) { 1871: &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol"); 1872: &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)"); 1873: if (($findupper) && ($i>$li)) { 1874: # Check lengths 1875: unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1876: # Successfully found a new label, set it 1877: $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i; 1878: &addlog("Rule $label passed, setting label $xfinallabel"); 1879: return 1; 1880: } else { 1881: &addlog("Rule $label failed."); 1882: &setfailed($label); 1883: return 0; 1884: } 1885: } 1886: } 1887: } 1888: # Corner case where this makes sense: using start or stop as defined labels 1889: unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; } 1890: &addlog("Rule $label passed."); 1891: return 1; 1892: } 1893: 1894: # 1895: # check for minimum and maximum lengths 1896: # 1897: 1898: sub checklength { 1899: my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_; 1900: unless (($minimumlength) || ($maximumlength)) { return 1; } 1901: my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax); 1902: if ($minimumlength) { 1903: if ($length<$minimumlength) { 1904: &addlog("Rule $label failed, actual length $length, minimum length $minimumlength"); 1905: &setfailed($label); 1906: return 0; 1907: } 1908: } 1909: if ($maximumlength) { 1910: if ($length>$maximumlength) { 1911: &addlog("Rule $label failed, actual length $length, maximum length $maximumlength"); 1912: &setfailed($label); 1913: return 0; 1914: } 1915: } 1916: return 1; 1917: } 1918: 1919: sub setfailed { 1920: my ($hintlabel)=@_; 1921: $hintlabel=~s/^R//; 1922: push(@Apache::functionplotresponse::failedrules,$hintlabel); 1923: &addlog("Set hint condition $hintlabel"); 1924: } 1925: 1926: sub start_functionplotruleset { 1927: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1928: if ($target eq 'edit') { 1929: return &Apache::edit::start_table($token). 1930: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>' 1931: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 1932: .&Apache::edit::deletelist($target,$token).'   '. 1933: &Apache::edit::insertlist($target,$token).'   ' 1934: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules') 1935: .'</span></td>' 1936: ."<td> " 1937: .&Apache::edit::end_row() 1938: .&Apache::edit::start_spanning_row() 1939: ."\n"; 1940: } 1941: } 1942: 1943: sub end_functionplotruleset { 1944: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1945: my $id=$Apache::inputtags::response[-1]; 1946: my $partid=$Apache::inputtags::part; 1947: my $internalid = $partid.'_'.$id; 1948: 1949: if ($target eq 'edit' ) { 1950: return &Apache::edit::end_table(); 1951: } elsif ($target eq 'grade' 1952: && &Apache::response::submitted() 1953: && $Apache::lonhomework::type ne 'exam') { 1954: # 1955: # Actually grade 1956: # 1957: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 1958: 1959: my $ad=''; 1960: undef %Apache::functionplotresponse::functionplotrulelabels; 1961: $Apache::functionplotresponse::ruleslog=''; 1962: $Apache::functionplotresponse::functionplotrulelabels{'start'}=400; 1963: $Apache::functionplotresponse::functionplotrulelabels{'end'}=0; 1964: if (&populate_arrays($internalid,$xmin,$xmax,$ymin,$ymax) eq 'no_func') { 1965: $ad='NOT_FUNCTION'; 1966: } else { 1967: &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ". 1968: $Apache::functionplotresponse::functionplotrulelabels{'start'}.")"); 1969: &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ". 1970: $Apache::functionplotresponse::functionplotrulelabels{'end'}.")"); 1971: 1972: # We have a function that we can actually grade, go through the spline rules. 1973: foreach my $rule (@Apache::functionplotresponse::functionplotrules) { 1974: unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) { 1975: $ad='INCORRECT'; 1976: last; 1977: } 1978: } 1979: # And now go through the vector rules 1980: foreach my $rule (@Apache::functionplotresponse::functionplotvectorrules) { 1981: unless (&functionplotvectorrulecheck($rule,$xmin,$xmax,$ymin,$ymax,$safeeval)) { 1982: $ad='INCORRECT'; 1983: last; 1984: } 1985: } 1986: # If it's not wrong, it's correct 1987: unless ($ad) { $ad='EXACT_ANS' }; 1988: } 1989: &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules)); 1990: &addlog("Assigned award detail: $ad"); 1991: # Store for later to be assigned at end_functionplotresponse 1992: $Apache::functionplotresponse::awarddetail=$ad; 1993: } 1994: } 1995: 1996: 1997: sub end_functionplotresponse { 1998: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 1999: &Apache::response::end_response; 2000: 2001: my $result; 2002: my $id=$Apache::inputtags::response[-1]; 2003: my $partid=$Apache::inputtags::part; 2004: my $internalid = $partid.'_'.$id; 2005: 2006: if ($target eq 'edit') { $result=&Apache::edit::end_table(); } 2007: if ($target eq 'grade' 2008: && &Apache::response::submitted() 2009: && $Apache::lonhomework::type eq 'exam') { 2010: 2011: &Apache::response::scored_response($partid,$id); 2012: 2013: } elsif ($target eq 'grade' 2014: && &Apache::response::submitted() 2015: && $Apache::lonhomework::type ne 'exam') { 2016: my ($response,%coords)=&get_answer_from_form_fields($internalid); 2017: $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; 2018: my %previous=&Apache::response::check_for_previous($response,$partid,$id); 2019: # 2020: # Assign grade 2021: # 2022: my $ad=$Apache::functionplotresponse::awarddetail; 2023: # 2024: # Store grading info 2025: # 2026: $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; 2027: &Apache::response::handle_previous(\%previous,$ad); 2028: } elsif ($target eq 'web') { 2029: undef @Apache::functionplotresponse::failedrules; 2030: } 2031: return $result; 2032: } 2033: 2034: sub end_functionplotelements { 2035: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 2036: my $result=''; 2037: my $id=$Apache::inputtags::response[-1]; 2038: my $partid=$Apache::inputtags::part; 2039: my $internalid = $partid.'_'.$id; 2040: if ($target eq 'edit' ) { 2041: $result=&Apache::edit::end_table(); 2042: } elsif ($target eq 'web') { 2043: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 2044: 2045: # Are we in show answer mode? 2046: my $showanswer=&Apache::response::show_answer(); 2047: if ($showanswer) { 2048: # Render answerdisplay 2049: my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2); 2050: if ($answerdisplay=~/\S/s) { 2051: foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) { 2052: my @components=split(/\s*\:\s*/,$plot); 2053: if ($#components<3) { 2054: # Just a simple plot 2055: my ($func,$xl,$xh)=@components; 2056: if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; } 2057: if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; } 2058: $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6); 2059: } else { 2060: # This is a spline 2061: $result.=&answer_spline_script($internalid,@components); 2062: } 2063: } 2064: } 2065: } 2066: my $fixed=0; 2067: if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; } 2068: # Now is the time to render all of the stored splines 2069: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 2070: $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed); 2071: } 2072: # close the init script 2073: $result.=&end_init_script(); 2074: # register all splines in this response 2075: $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'. 2076: join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n"; 2077: foreach my $label (keys(%Apache::functionplotresponse::splineorder)) { 2078: $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'. 2079: $Apache::functionplotresponse::splineorder{$label}.'" />'."\n"; 2080: } 2081: # generate the input fields 2082: $result.=$Apache::functionplotresponse::inputfields; 2083: # actually start the <applet>-tag 2084: $result.=&geogebra_startcode($internalid, 2085: &Apache::lonxml::get_param('width',$parstack,$safeeval,-2), 2086: &Apache::lonxml::get_param('height',$parstack,$safeeval,-2)); 2087: # load the spline bytecode 2088: $result.=&geogebra_spline_program(); 2089: # set default parameters 2090: $result.=&geogebra_default_parameters($internalid); 2091: # close the <applet>-tag 2092: $result.=&geogebra_endcode(); 2093: } 2094: return $result; 2095: } 2096: 2097: sub boundaries { 2098: my ($parstack,$safeeval,$level)=@_; 2099: my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level); 2100: $xmin=(defined($xmin)?$xmin:-10); 2101: my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level); 2102: $xmax=(defined($xmax)?$xmax:10); 2103: my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level); 2104: $ymin=(defined($ymin)?$ymin:-10); 2105: my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level); 2106: $ymax=(defined($ymax)?$ymax:10); 2107: if ($xmax<=$xmin) { 2108: $xmax=$xmin+20; 2109: } 2110: if ($ymax<=$ymin) { 2111: $ymax=$ymin+20; 2112: } 2113: return ($xmin,$xmax,$ymin,$ymax); 2114: } 2115: 2116: sub start_functionplotelements { 2117: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 2118: my $result=''; 2119: my $id=$Apache::inputtags::response[-1]; 2120: my $partid=$Apache::inputtags::part; 2121: my $internalid = $partid.'_'.$id; 2122: 2123: if ($target eq 'edit') { 2124: return &Apache::edit::start_table($token). 2125: '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>' 2126: .'<td><span class="LC_nobreak">'.&mt('Delete?').' ' 2127: .&Apache::edit::deletelist($target,$token).'   '. 2128: &Apache::edit::insertlist($target,$token).'   ' 2129: .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements') 2130: .'</span></td>' 2131: ."<td> " 2132: .&Apache::edit::end_row() 2133: .&Apache::edit::start_spanning_row() 2134: ."\n"; 2135: } elsif ($target eq 'web') { 2136: my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2); 2137: my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 2138: my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 2139: my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false'); 2140: my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2); 2141: my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2); 2142: 2143: 2144: # paste in the update routine to receive stuff back from the applet 2145: $result.=&update_script($internalid); 2146: # start the initscript for this applet 2147: $result.=&start_init_script($internalid); 2148: # put the axis commands inside 2149: $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible); 2150: $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel); 2151: # init script is left open 2152: } 2153: return $result; 2154: } 2155: 2156: 1; 2157: 2158: __END__ 2159: 2160: =head1 NAME 2161: 2162: Apache::functionplotresponse.pm; 2163: 2164: =head1 SYNOPSIS 2165: 2166: Handles tags associated with accepting function plots. 2167: 2168: This is part of the LearningOnline Network with CAPA project 2169: described at http://www.lon-capa.org. 2170: 2171: =head1 HANDLER SUBROUTINE 2172: 2173: start_functionplotresponse() 2174: 2175: =head1 OTHER SUBROUTINES 2176: 2177: =over 2178: 2179: =item end_functionplotresponse() 2180: 2181: =back 2182: 2183: =cut