--- loncom/homework/functionplotresponse.pm 2010/09/27 22:15:32 1.1
+++ loncom/homework/functionplotresponse.pm 2011/03/24 20:05:25 1.55
@@ -1,7 +1,7 @@
# LearningOnline Network with CAPA
# option list style responses
#
-# $Id: functionplotresponse.pm,v 1.1 2010/09/27 22:15:32 www Exp $
+# $Id: functionplotresponse.pm,v 1.55 2011/03/24 20:05:25 www Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -31,48 +31,1288 @@ use strict;
use Apache::response();
use Apache::lonlocal;
use Apache::lonnet;
-
+
BEGIN {
- &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse'));
+ &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline',
+ 'functionplotrule','functionplotruleset',
+ 'functionplotelements'));
}
+#
+# There can be a number of applets on a page, each called ggbApplet_$id,
+# where $id is the "_"-concatenated part and responseid
+#
+
sub geogebra_startcode {
+ my ($id)=@_;
return (<<ENDSTARTCODE);
-<applet name="ggbApplet" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
- codebase="/adm/geogebra/" width="714" height="447" MAYSCRIPT>
+<applet name="ggbApplet_$id" code="geogebra.GeoGebraApplet" archive="geogebra.jar"
+ codebase="/adm/geogebra/" width="722" height="447" MAYSCRIPT>
<param name="java_arguments" value="-Xmx512m -Djnlp.packEnabled=true"/>
ENDSTARTCODE
}
sub geogebra_endcode {
- return "\n</applet>\n";
+ return &Apache::lonhtmlcommon::java_not_enabled()."</applet>\n";
+}
+
+#
+# This is the internal GeoGebra bytecode which defines the spline functions
+#
+sub geogebra_spline_program {
+ return (<<ENDSPLINEPROGRAM);
+<param name="ggbBase64" value="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" />
+ENDSPLINEPROGRAM
+}
+
+#
+# The standard set of parameters inside <applet>
+#
+sub geogebra_default_parameters {
+ my ($id)=@_;
+ return(<<ENDDEFAULTPARAMETERS);
+ <param name="image" value="/adm/lonIcons/lonanim.gif" />
+ <param name="boxborder" value="false" />
+ <param name="centerimage" value="true" />
+ <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" />
+ <param name="cache_version" value="3.9.183.0, 3.9.183.0, 3.9.183.0, 3.9.183.0, 3.9.183.0, 3.9.183.0, 3.9.183.0, 3.9.183.0, 3.9.183.0, 3.9.183.0, 3.9.183.0" />
+ <param name="framePossible" value="false" />
+
+ <param name="showResetIcon" value="false" />
+ <param name="showAnimationButton" value="false" />
+ <param name="enableRightClick" value="false" />
+ <param name="errorDialogsActive" value="true" />
+ <param name="enableLabelDrags" value="false" />
+ <param name="showMenuBar" value="false" />
+ <param name="showToolBar" value="false" />
+ <param name="showToolBarHelp" value="false" />
+ <param name="showAlgebraInput" value="false" />
+ <param name="enableShiftDragZoom" value="false" />
+ <param name="allowRescaling" value="false" />
+ <param name="enableLabelDrags" value="false" />
+ <param name="ggbOnInitParam" value="applet_$id" />
+ENDDEFAULTPARAMETERS
+}
+
+#
+# This subroutine is called by LON-CAPA at </problem>
+# Each applet on the page will call function ggbOnInit when it is done loading
+# This function in turn will call the respective function registered by start_init_script
+# Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
+#
+
+sub init_script {
+ if ($#Apache::functionplotresponse::callscripts>=0) {
+ my $script='';
+ foreach my $id (@Apache::functionplotresponse::callscripts) {
+ $script.="if (param=='applet_$id') { loaded_$id=true; }\n";
+ }
+ $script.="if (".join(' && ',map { "loaded_$_" } (@Apache::functionplotresponse::callscripts)).
+ ") { setTimeout('ggbInitAll()',200) }";
+ my $calls=join("\n",map { "ggbInit_$_();" } (@Apache::functionplotresponse::callscripts));
+ return (<<ENDGGBINIT);
+<script type="text/javascript">
+// <![CDATA[
+// Function that each applet will call when loaded
+// It will pass "its" parameter
+// Set flags for when an applet is loaded, wait till all are loaded, and then some
+function ggbOnInit(param) {
+$script
+}
+function ggbInitAll() {
+$calls
+}
+// ]]>
+</script>
+ENDGGBINIT
+ }
+}
+
+#
+# Each Geogebra applet is supposed to call this when parameters change
+# Changes the hidden fields on the web page
+#
+sub update_script {
+ my ($id)=@_;
+ return (<<ENDUPDATESCRIPT);
+<script type="text/javascript">
+// <![CDATA[
+function updatePointCoordinates_$id(coordinateName) {
+ var x = document.ggbApplet_$id.getXcoord(coordinateName);
+ var y = document.ggbApplet_$id.getYcoord(coordinateName);
+ document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_x"].value = x;
+ document.lonhomework.elements["HWVAL_$id\_" + coordinateName + "_y"].value = y;
+ }
+// ]]>
+</script>
+ENDUPDATESCRIPT
+}
+
+#
+# Register the above update-handler for a variable
+#
+
+sub update_register {
+ my ($id,$variable)=@_;
+ return "document.ggbApplet_$id.registerObjectUpdateListener('$variable','updatePointCoordinates_$id');\n";
+}
+
+#
+# Set a point coordinate variable
+#
+sub set_point_coordinate {
+ my ($id,$variable,$x,$y,$fixed)=@_;
+ my $mult=($fixed?'a*':'');
+ return (<<ENDSETVARIABLE);
+document.ggbApplet_$id.evalCommand("a=1");
+document.ggbApplet_$id.evalCommand("$variable=$mult($x,$y)");
+document.ggbApplet_$id.setLabelVisible("$variable",false);
+ENDSETVARIABLE
+}
+
+#
+# Set a slope coordinate variable
+#
+sub set_slope_coordinate {
+ my ($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed)=@_;
+ my $xvariable=$variable.'x';
+ my $yvariable=$variable.'y';
+ my $domain=$xmax-$xmin;
+ my $range=$ymax-$ymin;
+ my $xinterval=$domain/100.;
+ my $yinterval=$range/200.;
+ my $mult=($fixed?'a*':'');
+ return (<<ENDSETSVARIABLE);
+document.ggbApplet_$id.evalCommand("a=1");
+document.ggbApplet_$id.evalCommand("$xvariable=Slider[$xinterval,$domain,$xinterval]");
+document.ggbApplet_$id.setVisible("$xvariable", false);
+document.ggbApplet_$id.evalCommand("$xvariable=$xrel");
+document.ggbApplet_$id.evalCommand("$yvariable=Slider[-$range,$range,$yinterval]");
+document.ggbApplet_$id.setVisible("$yvariable", false);
+document.ggbApplet_$id.evalCommand("$yvariable=$yrel");
+document.ggbApplet_$id.evalCommand("$variable=$mult($xvariable+x($pointname),$yvariable+y($pointname))");
+document.ggbApplet_$id.setLabelVisible("$variable", false);
+ENDSETSVARIABLE
+}
+
+#
+# Input field name for a coordinate variable
+#
+
+sub field_name {
+ my ($id,$variable,$name)=@_;
+ return "HWVAL_$id\_$variable\_$name";
+}
+
+#
+# Generate an input field for a coordinate variable
+#
+
+sub generate_input_field {
+ my ($id,$variable,$x,$y)=@_;
+ $Apache::functionplotresponse::inputfields.=
+ "<input type='hidden' name='".&field_name($id,$variable,'x')."' value='$x' />\n".
+ "<input type='hidden' name='".&field_name($id,$variable,'y')."' value='$y' />\n";
+}
+
+#
+# Initialize a new point coordinate variable at set a listener on it
+#
+sub new_point_coordinate {
+ my ($id,$variable,$x,$y,$fixed)=@_;
+ if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
+ $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
+ }
+ if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
+ $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
+ }
+ &generate_input_field($id,$variable,$x,$y);
+ return &set_point_coordinate($id,$variable,$x,$y,$fixed).&update_register($id,$variable);
+}
+
+#
+# Initialize a new slope coordinate variable at set a listener on it
+#
+sub new_slope_coordinate {
+ my ($id,$variable,$x,$y,$pointname,$xp,$yp,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
+#
+# $variable: name of the slope point
+# $x, $y: coordinates of the slope point
+# $pointname: name of the associated point point
+# $xp $yp: coordinates of the point point
+#
+ if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'x')})) {
+ $x=$Apache::functionplotresponse::previous{&field_name($id,$variable,'x')};
+ }
+ if (defined($Apache::functionplotresponse::previous{&field_name($id,$variable,'y')})) {
+ $y=$Apache::functionplotresponse::previous{&field_name($id,$variable,'y')};
+ }
+ if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')})) {
+ $xp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'x')};
+ }
+ if (defined($Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')})) {
+ $yp=$Apache::functionplotresponse::previous{&field_name($id,$pointname,'y')};
+ }
+
+ &generate_input_field($id,$variable,$x,$y);
+ my $xrel=$x-$xp;
+ my $yrel=$y-$yp;
+ return &set_slope_coordinate($id,$variable,$xrel,$yrel,$xmin,$xmax,$ymin,$ymax,$pointname,$fixed).&update_register($id,$variable);
+}
+
+#
+# This registers the init-function call for ggbOnInit, which LON-CAPA will place at </problem>
+# It then starts the right headers
+#
+sub start_init_script {
+ my ($id)=@_;
+# Add id to the list of ggbInit_$id functions that need to be called
+ push(@Apache::functionplotresponse::callscripts,$id);
+# ... and open this function
+ return (<<ENDSTARTINIT);
+<script type="text/javascript">
+// <![CDATA[
+// variable that will eventually be passed back to the server
+var coordinateMap_$id = [];
+// flag for not loaded yet
+var loaded_$id=false;
+// Init-function for applet
+function ggbInit_$id() {
+ENDSTARTINIT
+}
+
+#
+# This sets the axes inside ggbInit_$id
+#
+
+sub axes_script {
+ my ($id,$xmin,$xmax,$ymin,$ymax,$xvisible,$yvisible,$gvisible)=@_;
+ return (<<ENDAXESSCRIPT);
+ // changes (xmin, xmax, ymin, ymax)
+ document.ggbApplet_$id.setCoordSystem($xmin,$xmax,$ymin,$ymax);
+
+ // makes the (x,y) axis (in)visible
+ document.ggbApplet_$id.setAxesVisible($xvisible,$yvisible);
+ // makes the grid (in)visible
+ document.ggbApplet_$id.setGridVisible($gvisible);
+ENDAXESSCRIPT
+}
+
+sub axes_label {
+ my ($id,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel)=@_;
+ unless ($xlabel || $ylabel) { return ''; }
+ my $return='document.ggbApplet_'.$id.'.evalCommand("topRight=Corner[3]");';
+ if ($xlabel) {
+ if (($ymin<0) && ($ymax>0)) {
+ $return.=(<<ENDXAXISLABELSCRIPT);
+document.ggbApplet_$id.evalCommand("Xlabel=(x(topRight)-AxisStepX[],AxisStepY[]/6)");
+document.ggbApplet_$id.setVisible("Xlabel",false);
+document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", Xlabel]");
+ENDXAXISLABELSCRIPT
+ } else {
+ $return.=(<<ENDXOFFAXISLABEL);
+document.ggbApplet_$id.evalCommand("LowerRight=Corner[2]");
+document.ggbApplet_$id.evalCommand("Text[\\"$xlabel\\", (x(LowerRight) - AxisStepX[], y(LowerRight) + AxisStepY[] / 2)]");
+ENDXOFFAXISLABEL
+ }
+ }
+ if ($ylabel) {
+ if (($xmin<0) && ($xmax>0)) {
+ $return.=(<<ENDYAXISLABELSCRIPT);
+document.ggbApplet_$id.evalCommand("Ylabel=(AxisStepX[]/6,y(topRight)-AxisStepY[]/3)");
+document.ggbApplet_$id.setVisible("Ylabel",false);
+document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", Ylabel]");
+ENDYAXISLABELSCRIPT
+ } else {
+ $return.=(<<ENDYOFFAXISLABEL);
+document.ggbApplet_$id.evalCommand("UpperLeft=Corner[4]");
+document.ggbApplet_$id.evalCommand("Text[\\"$ylabel\\", (x(UpperLeft) + AxisStepX[] / 5, y(UpperLeft) - AxisStepY[] / 1.8)]");
+ENDYOFFAXISLABEL
+ }
+ }
+ return $return;
+}
+
+sub plot_script {
+ my ($id,$function,$fixed,$label,$color,$xmin,$xmax,$thickness)=@_;
+ $label=~s/\W//g;
+ if (($label) && ($label!~/^[A-Za-z]/)) {
+ $label='C'.$label;
+ }
+ my $visible=0;
+ if ($label) {
+ $visible="1";
+ } else {
+ $Apache::functionplotresponse::counter++;
+ $label='C'.$Apache::functionplotresponse::counter;
+ }
+ my $rc=0;
+ my $gc=0;
+ my $bc=0;
+ if ($color) {
+ my ($rh,$gh,$bh)=($color=~/(..)(..)(..)/);
+ $rc=hex($rh);
+ $gc=hex($gh);
+ $bc=hex($bh);
+ }
+ if ($fixed) {
+ return "document.ggbApplet_$id.evalCommand('$label=Function[$function,$xmin,$xmax]');\n".
+ ($visible?'':"document.ggbApplet_$id.setLabelVisible('$label', false);\n").
+ ($color?"document.ggbApplet_$id.setColor('$label',$rc,$gc,$bc);\n":'').
+ ($thickness?"document.ggbApplet_$id.setLineThickness('$label',$thickness);\n":'');
+ } else {
+ return "document.ggbApplet_$id.evalCommand('y=$function');\n";
+ }
+}
+
+#
+# Subroutine that generates code for spline $label based on stored information
+#
+
+sub generate_spline {
+ my ($id,$label,$xmin,$xmax,$ymin,$ymax,$fixed)=@_;
+ my $result='';
+ my $order=$Apache::functionplotresponse::splineorder{$label};
+ my $x=$Apache::functionplotresponse::splineinitx{$label};
+ my $y=$Apache::functionplotresponse::splineinity{$label};
+ my $sx=$Apache::functionplotresponse::splinescalex{$label};
+ my $sy=$Apache::functionplotresponse::splinescaley{$label};
+ my @coords=();
+ foreach my $i (1..$order) {
+ $result.=&new_point_coordinate($id,$label.'P'.$i,$x,$y,$fixed);
+ my $xp=$x;
+ $x+=$sx/(2.*($order-1));
+ push(@coords,$label.'P'.$i);
+ $result.=&new_slope_coordinate($id,$label.'S'.$i,$x,$y+$sy,$label.'P'.$i,$xp,$y,$xmin,$xmax,$ymin,$ymax,$fixed);
+ $x+=$sx/(2.*($order-1));
+ push(@coords,$label.'S'.$i);
+ }
+ $result.='document.ggbApplet_'.$id.'.evalCommand("Spline'.$order.'['.join(',',@coords).']");'."\n";
+ return $result;
+}
+#
+# <backgroundplot function="..." fixed="yes/no" />
+#
+sub start_backgroundplot {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result='';
+ my $internalid = $Apache::inputtags::part.'_'.$Apache::inputtags::response[-1];
+ my $function=&Apache::lonxml::get_param('function',$parstack,$safeeval);
+ my $xinitial=&Apache::lonxml::get_param('xinitial',$parstack,$safeeval);
+ my $xfinal=&Apache::lonxml::get_param('xfinal',$parstack,$safeeval);
+ my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
+ my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval);
+ $color=~s/[^a-fA-F0-9]//gs;
+ unless (length($color)==6) { $color=''; }
+ my $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
+
+ unless ($function) { $function="0"; }
+ if ($target eq 'web') {
+ my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-3);
+ unless (defined($xinitial)) { $xinitial=$xmin; }
+ unless (defined($xfinal)) { $xfinal=$xmax; }
+ $result.=&plot_script($internalid,$function,$fixed,$label,$color,$xinitial,$xfinal);
+ } elsif ($target eq 'edit') {
+ $result=&Apache::edit::tag_start($target,$token,'Background Function Plot').
+ &Apache::edit::text_arg('Function:','function',
+ $token,'16').
+ &Apache::edit::text_arg('Initial x-value (optional):','xinitial',
+ $token,'8').
+ &Apache::edit::text_arg('Final x-value (optional):','xfinal',
+ $token,'8').
+ &Apache::edit::text_arg('Label on Plot:','label',
+ $token,'8').
+ &Apache::edit::text_arg('Color (hex code):','color',
+ $token,'8').
+ &Apache::edit::select_arg('Fixed location:','fixed',
+ ['yes','no'],$token).
+ &Apache::edit::end_row();
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+ $safeeval,'function','label','xinitial','xfinal','color','fixed');
+ if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
+ }
+ return $result;
+}
+
+sub end_backgroundplot {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result='';
+ if ($target eq 'edit') {
+ $result=&Apache::edit::end_table();
+ }
+ return $result;
+}
+
+#
+# <functionplotrule ... />
+#
+sub start_functionplotrule {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result='';
+ my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
+ $Apache::functionplotresponse::counter++;
+ if ($label=~/\W/) {
+ &Apache::lonxml::warning(&mt('Rule indices should only contain alphanumeric characters.'));
+ }
+ $label=~s/\W//gs;
+ unless ($label) {
+ $label='R'.$Apache::functionplotresponse::counter;
+ } else {
+ $label='R'.$label;
+ }
+ if ($Apache::functionplotresponse::splineorder{$label}) {
+ &Apache::lonxml::error(&mt('Rule indices must be unique.'));
+ }
+
+
+ if ($target eq 'grade') {
+# Simply remember - in order - for later
+ my $beginninglabel=&Apache::lonxml::get_param('xinitiallabel',$parstack,$safeeval);
+ my $endinglabel=&Apache::lonxml::get_param('xfinallabel',$parstack,$safeeval);
+ if (($beginninglabel=~/\W/) || ($endinglabel=~/W/)) {
+ &Apache::lonxml::warning(&mt('Rule labels must be alphanumeric.'));
+ }
+ $beginninglabel=~s/\W//gs;
+ $endinglabel=~s/\W//gs;
+ my $relationship=&Apache::lonxml::get_param('relationship',$parstack,$safeeval);
+ $relationship=~s/\W//gs;
+ $relationship=lc($relationship);
+ unless ($relationship=~/^(eq|ge|gt|le|lt|ne)$/) {
+ &Apache::lonxml::warning(&mt('Rule relationship not defined.'));
+ $relationship='eq';
+ }
+ my $derivative=&Apache::lonxml::get_param('derivativeorder',$parstack,$safeeval);
+ unless (($derivative==-1) || ($derivative==0) || ($derivative==1) || ($derivative==2)) {
+ &Apache::lonxml::warning(&mt('Rule derivative not defined.'));
+ $derivative=0;
+ }
+ push(@Apache::functionplotresponse::functionplotrules,join(':',(
+ $label,
+ $derivative,
+ &Apache::lonxml::get_param('xinitial',$parstack,$safeeval),
+ $beginninglabel,
+ &Apache::lonxml::get_param('xfinal',$parstack,$safeeval),
+ $endinglabel,
+ &Apache::lonxml::get_param('minimumlength',$parstack,$safeeval),
+ &Apache::lonxml::get_param('maximumlength',$parstack,$safeeval),
+ $relationship,
+ &Apache::lonxml::get_param('value',$parstack,$safeeval),
+ &Apache::lonxml::get_param('percenterror',$parstack,$safeeval)
+ )));
+ } elsif ($target eq 'edit') {
+ $result=&Apache::edit::tag_start($target,$token,'Function Plot Evaluation Rule').
+ &Apache::edit::text_arg('Index/Name:','index',
+ $token,'10').' '.
+ &Apache::edit::select_arg(&mt('Function:'),'derivativeorder',
+ [['0','Function itself'],
+ ['1','First derivative'],
+ ['2','Second derivative'],
+ ['-1','Integral']],$token).'<br />'.
+ &Apache::edit::text_arg('Initial x-value:','xinitial',
+ $token,'8').
+ &Apache::edit::select_or_text_arg('Initial x-value label:','xinitiallabel',
+ [['start','Start of Plot'],
+ ['end','End of Plot']],$token,'8').'<br />'.
+
+ &Apache::edit::text_arg('Final x-value (optional):','xfinal',
+ $token,'8').
+ &Apache::edit::select_or_text_arg('Final x-value label (optional):','xfinallabel',
+ [['end','End of Plot']],$token,'8').'<br />'.
+ &Apache::edit::text_arg('Minimum length for range (optional):','minimumlength',
+ $token,'8').
+ &Apache::edit::text_arg('Maximum length for range (optional):','maximumlength',
+ $token,'8').'<br />'.
+ &Apache::edit::select_or_text_arg(&mt('Relationship:'),'relationship',
+ [['eq','equal'],
+ ['ne','not equal'],
+ ['ge','greater than or equal'],
+ ['gt','greater than'],
+ ['lt','less than'],
+ ['le','less than or equal']],$token).
+ $result.= &Apache::edit::select_or_text_arg('Value:','value',
+ [['undef','not defined']],$token,'8').
+ &Apache::edit::text_arg('Percent error:','percenterror',
+ $token,'8').
+ &Apache::edit::end_row();
+ } elsif ($target eq 'modified') {
+ if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) {
+ $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}='';
+ }
+ if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') && ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) {
+ $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}='';
+ }
+ my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+ $safeeval,'index','derivativeorder',
+ 'xinitial','xinitiallabel','xfinal','xfinallabel',
+ 'minimumlength','maximumlength',
+ 'relationship','value','percenterror');
+ if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
+ }
+ return $result;
+}
+
+sub end_functionplotrule {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result='';
+ if ($target eq 'edit') {
+ $result=&Apache::edit::end_table();
+ }
+ return $result;
+}
+
+
+#
+# <spline index="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
+#
+# Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
+#
+sub start_spline {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result='';
+ if ($target eq 'web') {
+ my $label=&Apache::lonxml::get_param('index',$parstack,$safeeval);
+ $Apache::functionplotresponse::counter++;
+ if ($label=~/\W/) {
+ &Apache::lonxml::warning(&mt('Spline indices should only contain alphanumeric characters.'));
+ }
+ $label=~s/\W//gs;
+ unless ($label) {
+ $label='S'.$Apache::functionplotresponse::counter;
+ } else {
+ $label='S'.$label;
+ }
+ if ($Apache::functionplotresponse::splineorder{$label}) {
+ &Apache::lonxml::error(&mt('Spline indices must be unique.'));
+ }
+
+ my $order=&Apache::lonxml::get_param('order',$parstack,$safeeval);
+ if ($order<2) { $order=2; }
+ if ($order>8) { $order=8; }
+ $Apache::functionplotresponse::splineorder{$label}=$order;
+
+ my $x=&Apache::lonxml::get_param('initx',$parstack,$safeeval);
+ unless ($x) { $x=0; }
+ $Apache::functionplotresponse::splineinitx{$label}=$x;
+
+ my $y=&Apache::lonxml::get_param('inity',$parstack,$safeeval);
+ unless ($y) { $y=0; }
+ $Apache::functionplotresponse::splineinity{$label}=$y;
+
+ my $sx=&Apache::lonxml::get_param('scalex',$parstack,$safeeval);
+ unless ($sx) { $sx=$order; }
+ $Apache::functionplotresponse::splinescalex{$label}=$sx;
+
+ my $sy=&Apache::lonxml::get_param('scaley',$parstack,$safeeval);
+ unless ($sy) { $sy=2; }
+ $Apache::functionplotresponse::splinescaley{$label}=$sy;
+ } elsif ($target eq 'edit') {
+ $result=&Apache::edit::tag_start($target,$token,'Spline').
+ &Apache::edit::text_arg('Index:','index',
+ $token,'4').' '.
+ &Apache::edit::select_arg('Order:','order',
+ ['2','3','4','5','6','7','8'],$token).' '.
+ &Apache::edit::text_arg('Initial x-value:','initx',
+ $token,'4').' '.
+ &Apache::edit::text_arg('Initial y-value:','inity',
+ $token,'4').' '.
+ &Apache::edit::text_arg('Scale x:','scalex',
+ $token,'4').' '.
+ &Apache::edit::text_arg('Scale y:','scaley',
+ $token,'4').
+ &Apache::edit::end_row();
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+ $safeeval,'index','order','initx','inity',
+ 'scalex','scaley');
+ if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
+ }
+ return $result;
+}
+
+sub end_spline {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result='';
+ if ($target eq 'edit') {
+ $result=&Apache::edit::end_table();
+ }
+ return $result;
+}
+
+sub end_init_script {
+ return (<<ENDENDINIT);
+}
+// ]]>
+</script>
+ENDENDINIT
+}
+
+#
+# Storing and restoring spline coordinates from part answers
+#
+sub decode_previous_answer {
+ my ($answer)=@_;
+ foreach my $coordinate (split(/\,/,$answer)) {
+ my ($key,$value)=split(/\=/,$coordinate);
+ $Apache::functionplotresponse::previous{$key}=$value;
+ }
+}
+
+sub get_answer_from_form_fields {
+ my ($id)=@_;
+ my $answer='';
+ my %coords=();
+ foreach my $field (keys(%env)) {
+ if ($field=~/^form\.HWVAL\_$id/) {
+ $field=~/^form\.(.*)$/;
+ $coords{$1}=$env{$field};
+ }
+ }
+ $answer=join(',',map { $_.'='.$coords{$_} } (sort(keys(%coords))));
+ return ($answer,%coords);
+}
+
+#
+# The following functions calculate the cubic-hermite splines server-side
+#
+
+sub cubic_hermite {
+ my ($t,$p1,$s1,$p2,$s2)=@_;
+ return (2.*$t*$t*$t-3.*$t*$t+1.)*$p1 + 3.*($t*$t*$t-2.*$t*$t+$t)*($s1-$p1)+
+ (-2.*$t*$t*$t+3.*$t*$t) *$p2 + 3.*($t*$t*$t-$t*$t) *($s2-$p2);
+}
+
+#
+# d/dt(...)
+#
+
+sub ddt_cubic_hermite {
+ my ($t,$p1,$s1,$p2,$s2)=@_;
+ return (6.*$t*$t-6.*$t) *$p1 + 3.*(3.*$t*$t-4.*$t+1.)*($s1-$p1)+
+ (-6.*$t*$t+6.*$t)*$p2 + 3.*(3.*$t*$t-2.*$t) *($s2-$p2);
}
+#
+# d^2/dt^2(...)
+#
+
+sub d2dt2_cubic_hermite {
+ my ($t,$p1,$s1,$p2,$s2)=@_;
+ return (12.*$t-6.) *$p1 + 3.*(6.*$t-4.)*($s1-$p1)+
+ (-12.*$t+6.)*$p2 + 3.*(6.*$t-2.)*($s2-$p2);
+}
+
+#
+# Array index calculation
+#
+sub array_index {
+ my ($xmin,$xmax,$x)=@_;
+ if ($x ne '') {
+ return int(($x-$xmin)/($xmax-$xmin)*400.+0.5);
+ } else {
+ return undef;
+ }
+}
+
+#
+# Populate the arrays
+#
+
+sub populate_arrays {
+ my ($id,$xmin,$xmax)=@_;
+ for (my $i=0; $i<=400; $i++) {
+ $Apache::functionplotresponse::actualxval[$i]=undef;
+ $Apache::functionplotresponse::func[$i]=undef;
+ $Apache::functionplotresponse::dfuncdx[$i]=undef;
+ $Apache::functionplotresponse::d2funcd2x[$i]=undef;
+ }
+ unless ($xmax>$xmin) { return 'no_func'; }
+# Run over all splines in response
+ foreach my $label (split(/\,/,$env{"form.HWVAL_AllSplines_$id"})) {
+ my $xiold=-1;
+# Run over all points in spline
+ for (my $i=1; $i<$env{"form.HWVAL_SplineOrder_".$id."_".$label}; $i++) {
+ my $ni=$i+1;
+ my @xparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_x'},
+ $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_x'},
+ $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_x'},
+ $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_x'});
+ my @yparms=($env{'form.HWVAL_'.$id.'_'.$label.'P'.$i.'_y'},
+ $env{'form.HWVAL_'.$id.'_'.$label.'S'.$i.'_y'},
+ $env{'form.HWVAL_'.$id.'_'.$label.'P'.$ni.'_y'},
+ $env{'form.HWVAL_'.$id.'_'.$label.'S'.$ni.'_y'});
+# Run in small steps over spline parameter
+ for (my $t=0; $t<=1; $t+=0.0001) {
+ my $xreal=&cubic_hermite($t,@xparms);
+ my $xi=&array_index($xmin,$xmax,$xreal);
+ if ($xi<$xiold) { return 'no_func'; }
+ if (($xi>$xiold) && ($xi>=0) && ($xi<=400)) {
+ if (defined($Apache::functionplotresponse::func[$xi])) { return 'no_func'; }
+ $xiold=$xi;
+ $Apache::functionplotresponse::actualxval[$xi]=$xreal;
+# Function value
+ my $funcval=&cubic_hermite($t,@yparms);
+ $Apache::functionplotresponse::func[$xi]=$funcval;
+ if (defined($funcval)) {
+ if ($xi<$Apache::functionplotresponse::functionplotrulelabels{'start'}) {
+ $Apache::functionplotresponse::functionplotrulelabels{'start'}=$xi;
+ }
+ if ($xi>$Apache::functionplotresponse::functionplotrulelabels{'end'}) {
+ $Apache::functionplotresponse::functionplotrulelabels{'end'}=$xi;
+ }
+ }
+# Chain rule
+# dy/dx=dy/dt/(dx/dt)
+ my $dxdt=&ddt_cubic_hermite($t,@xparms);
+ if ($dxdt) {
+ $Apache::functionplotresponse::dfuncdx[$xi]=&ddt_cubic_hermite($t,@yparms)/$dxdt;
+# Second derivative
+ $Apache::functionplotresponse::d2funcdx2[$xi]=
+ ($dxdt*&d2dt2_cubic_hermite($t,@yparms)-&ddt_cubic_hermite($t,@yparms)*&d2dt2_cubic_hermite($t,@xparms))/
+ ($dxdt*$dxdt*$dxdt);
+ }
+ }
+ }
+ }
+ }
+}
+
+#
+# Implementation of <functionplotresponse>
+#
+
sub start_functionplotresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- #when in a option response use these
-# &Apache::lonxml::register('Apache::optionresponse',('foilgroup','foil','conceptgroup','drawoptionlist'));
- push (@Apache::lonxml::namespace,'optionresponse');
- my $id = &Apache::response::start_response($parstack,$safeeval);
- if ($target eq 'web') {
- $result.=&geogebra_startcode();
+# To remember the splines - somehow, they need to come last
+ undef %Apache::functionplotresponse::splineorder;
+ undef %Apache::functionplotresponse::splineinitx;
+ undef %Apache::functionplotresponse::splineinity;
+ undef %Apache::functionplotresponse::splinescalex;
+ undef %Apache::functionplotresponse::splinescaley;
+# Remember input fields, etc
+ undef %Apache::functionplotresponse::previous;
+ $Apache::functionplotresponse::inputfields='';
+ $Apache::functionplotresponse::counter=0;
+# Remember rules
+ undef @Apache::functionplotresponse::functionplotrules;
+# Remember failed rules
+ if ($target eq 'grade') {
+ undef @Apache::functionplotresponse::failedrules;
}
+# Delete previous awards
+ undef $Apache::functionplotresponse::awarddetail;
+# Part and ID
+ my $partid=$Apache::inputtags::part;
+ my $id=&Apache::response::start_response($parstack,$safeeval);
+# Internal ID to mark the applet and its coordinates
+ my $internalid = $partid.'_'.$id;
+# Previous answer
+ &decode_previous_answer($Apache::lonhomework::history{"resource.$partid.$id.submission"});
+
+# Parameters of <functionplotresponse>
+ my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval);
+ my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
+ my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
+ my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
+ my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval);
+ my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval);
+ if ($target eq 'edit') {
+ $result.=&Apache::edit::start_table($token)
+ .'<tr><td><span class="LC_nobreak">'.&mt('Function Plot Question').'</span></td>'
+ .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
+ .&Apache::edit::deletelist($target,$token).' '
+ .&Apache::edit::insertlist($target,$token).' '
+ .&Apache::loncommon::help_open_topic('Function_Plot_Response_Question','Function Plot Responses')
+ .'</span></td>'
+ ."<td> "
+ .&Apache::edit::end_row()
+ .&Apache::edit::start_spanning_row()
+ ."\n";
+ $result.=&Apache::edit::text_arg('Label x-axis:','xlabel',
+ $token,'6').' '.
+ &Apache::edit::text_arg('Minimum x-value:','xmin',
+ $token,'4').' '.
+ &Apache::edit::text_arg('Maximum x-value:','xmax',
+ $token,'4').' '.
+ &Apache::edit::select_arg('x-axis visible:','xaxisvisible',
+ ['yes','no'],$token).'<br />'.
+ &Apache::edit::text_arg('Label y-axis:','ylabel',
+ $token,'6').' '.
+ &Apache::edit::text_arg('Minimum y-value:','ymin',
+ $token,'4').' '.
+ &Apache::edit::text_arg('Maximum y-value:','ymax',
+ $token,'4').' '.
+ &Apache::edit::select_arg('y-axis visible:','yaxisvisible',
+ ['yes','no'],$token).'<br />'.
+ &Apache::edit::select_arg('Grid visible:','gridvisible',
+ ['yes','no'],$token).'<br />'.
+ &Apache::edit::text_arg('Background plot(s) for answer (function:xmin:xmax,function:xmin:xmax,...):',
+ 'answerdisplay',$token,'50');
+
+ &Apache::edit::end_row().&Apache::edit::start_spanning_row();
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+ $safeeval,'xlabel','xmin','xmax','ylabel','ymin','ymax',
+ 'xaxisvisible','yaxisvisible','gridvisible','answerdisplay');
+ if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
+
+ } elsif ($target eq 'meta') {
+ $result=&Apache::response::meta_package_write('functionplotresponse');
+ } elsif (($target eq 'answer') &&
+ ($env{'form.answer_output_mode'} ne 'tex') &&
+ ($Apache::lonhomework::viewgrades == 'F')) {
+ my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
+ my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
+ my $start_page = &Apache::loncommon::start_page('Rules Log', undef,
+ {'only_body' => 1,
+ 'bgcolor' => '#FFFFFF',
+ 'js_ready' => 1,});
+ my $end_page = &Apache::loncommon::end_page({'js_ready' => 1,});
+ $uname =~s/\W//g;
+ $udom =~s/\W//g;
+ my $function_name =
+ join('_','LONCAPA_scriptvars',$uname,$udom,
+ $env{'form.counter'},$Apache::lonxml::curdepth);
+ my $rules_var ="<script type=\"text/javascript\">
+// <![CDATA[
+ function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>".
+ $Apache::functionplotresponse::ruleslog.
+ "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
+// ]]>
+</script><a href=\"javascript:$function_name();void(0);\">".&mt('Rules Log')."</a><br />";
+ &Apache::lonxml::add_script_result($rules_var);
+ }
+
return $result;
}
+sub compare_rel {
+ my ($relationship,$value,$realval,$tol)=@_;
+# is the real value undefined?
+ unless (defined($realval)) {
+# the real value is not defined
+ if ($relationship eq 'eq') {
+ if ($value eq 'undef') {
+ return 1;
+ } else {
+ return 0;
+ }
+ } elsif ($relationship eq 'ne') {
+ if ($value eq 'undef') {
+ return 0;
+ } else {
+ return 1;
+ }
+ } else {
+ return 0;
+ }
+ }
+
+# is the expected value undefined?
+ if ($value eq 'undef') {
+# but by now we know that the real value is defined
+ return 0;
+ }
+
+# both are defined.
+ if ($relationship eq 'gt') {
+ return ($realval>$value);
+ } elsif ($relationship eq 'ge') {
+ return ($realval>$value-$tol);
+ } elsif ($relationship eq 'lt') {
+ return ($realval<$value);
+ } elsif ($relationship eq 'le') {
+ return ($realval<$value+$tol);
+ } elsif ($relationship eq 'ne') {
+ return (abs($value-$realval)>$tol);
+ } else {
+ return (abs($value-$realval)<$tol);
+ }
+ return 0;
+}
+
+sub addlog {
+ my ($text)=@_;
+ $Apache::functionplotresponse::ruleslog.=$text.'<br />';
+}
+
+sub actualval {
+ my ($i,$xmin,$xmax)=@_;
+ return $xmin+$i/400.*($xmax-$xmin);
+}
+
+sub functionplotrulecheck {
+ my ($rule,$xmin,$xmax,$ymin,$ymax)=@_;
+
+ my ($label,$derivative,$xinitial,$xinitiallabel,$xfinal,$xfinallabel,$minimumlength,$maximumlength,$relationship,$value,$percent)
+ =split(/\:/,$rule);
+ $percent=($percent>0?$percent:5);
+ &addlog("=================");
+ &addlog("Rule $label for ".($derivative<0?'integral':('function itself','first derivative','second derivative')[$derivative])." $relationship $value");
+ if ((defined($minimumlength)) || (defined($maximumlength))) {
+ &addlog("Minimumlength $minimumlength Maximumlength $maximumlength");
+ }
+ my $li=0;
+ my $lh=400;
+
+# Special case: the upper boundary was not defined
+# and needs to be set to the value where
+# the condition is not true anymore => set flag
+
+ my $findupper=0;
+ if (($xfinal eq '')
+ && (!defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}))
+ && ($xfinallabel)) {
+ $findupper=1;
+ }
+
+# if a hard value is set for the boundaries, it overrides the label
+ if (($xinitial ne '') && ($xinitiallabel ne '') && ($xinitiallabel ne 'start')) {
+ $li=&array_index($xmin,$xmax,$xinitial);
+ $Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel}=$li;
+ }
+ if (($xfinal ne '') && ($xfinallabel ne '') && ($xfinallabel ne 'end')) {
+ $lh=&array_index($xmin,$xmax,$xfinal);
+ $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$lh;
+ }
+# if the label is defined, use it
+ if (defined($Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel})) {
+ &addlog("Using lower label $xinitiallabel");
+ $li=$Apache::functionplotresponse::functionplotrulelabels{$xinitiallabel};
+ } else {
+ $li=&array_index($xmin,$xmax,$xinitial);
+ }
+ unless ($findupper) {
+ if (defined($Apache::functionplotresponse::functionplotrulelabels{$xfinallabel})) {
+ &addlog("Using upper label $xfinallabel");
+ $lh=$Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}-1;
+ } else {
+ $lh=&array_index($xmin,$xmax,$xfinal);
+ }
+ }
+# Basic sanity checks
+ if ($li<0) { $li=0; }
+ if ($lh>400) { $lh=400; }
+ if (($li>$lh) || (!defined($lh))) {
+ $lh=$li;
+ }
+
+ &addlog("Boundaries: x=".&actualval($li,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$li]."; index $li)) to x=".
+ &actualval($lh,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$lh]."; index $lh))");
+ if ($findupper) {
+ &addlog("Looking for label $xfinallabel");
+ }
+ my $tol=$percent*($ymax-$ymin)/100;
+ if ($xmax>$xmin) {
+ if ($derivative==2) {
+ $tol=4.*$tol/($xmax-$xmin);
+ } elsif ($derivative==1) {
+ $tol=2.*$tol/($xmax-$xmin);
+ } elsif ($derivative==-1) {
+ $tol=$tol*($xmax-$xmin)/2.;
+ }
+ }
+ my $integral=0;
+ my $binwidth=($xmax-$xmin)/400.;
+ if (($derivative<0) && (!$findupper)) {
+# definite integral, calculate over whole length
+ &addlog("Calculating definite integral");
+ for (my $i=$li; $i<=$lh; $i++) {
+ $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
+ }
+ unless (&compare_rel($relationship,$value,$integral,$tol)) {
+ &addlog("Actual integral ".(defined($integral)?$integral:'undef').", expected $value, tolerance $tol");
+ &addlog("Rule $label failed.");
+ my $hintlabel=$label;
+ $hintlabel=~s/^R//;
+ push(@Apache::functionplotresponse::failedrules,$hintlabel);
+ &addlog("Set hint condition $hintlabel");
+ return 0;
+ }
+ } else {
+ for (my $i=$li; $i<=$lh; $i++) {
+ my $val;
+ if ($derivative==2) {
+ $val=$Apache::functionplotresponse::d2funcdx2[$i];
+ } elsif ($derivative==1) {
+ $val=$Apache::functionplotresponse::dfuncdx[$i];
+ } elsif ($derivative==-1) {
+ $integral+=$Apache::functionplotresponse::func[$i]*$binwidth;
+ $val=$integral;
+ } else {
+ $val=$Apache::functionplotresponse::func[$i];
+ }
+ unless (&compare_rel($relationship,$value,$val,$tol)) {
+ &addlog("Actual value ".(defined($val)?$val:'undef').", expected $value, tolerance $tol");
+ &addlog("Condition not fulfilled at x=".&actualval($i,$xmin,$xmax)." (".$Apache::functionplotresponse::actualxval[$i]."; index $i)");
+ if (($findupper) && ($i>$li)) {
+# Check lengths
+ unless (&checklength($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
+# Successfully found a new label, set it
+ $Apache::functionplotresponse::functionplotrulelabels{$xfinallabel}=$i;
+ &addlog("Rule $label passed, setting label $xfinallabel");
+ return 1;
+ } else {
+ &addlog("Rule $label failed.");
+ &setfailed($label);
+ return 0;
+ }
+ }
+ }
+ }
+# Corner case where this makes sense: using start or stop as defined labels
+ unless (&checklength($lh,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)) { return 0; }
+ &addlog("Rule $label passed.");
+ return 1;
+}
+
+#
+# check for minimum and maximum lengths
+#
+
+sub checklength {
+ my ($i,$li,$minimumlength,$maximumlength,$xmin,$xmax,$label)=@_;
+ unless (($minimumlength) || ($maximumlength)) { return 1; }
+ my $length=&actualval($i,$xmin,$xmax)-&actualval($li,$xmin,$xmax);
+ if ($minimumlength) {
+ if ($length<$minimumlength) {
+ &addlog("Rule $label failed, actual length $length, minimum length $minimumlength");
+ &setfailed($label);
+ return 0;
+ }
+ }
+ if ($maximumlength) {
+ if ($length>$maximumlength) {
+ &addlog("Rule $label failed, actual length $length, maximum length $maximumlength");
+ &setfailed($label);
+ return 0;
+ }
+ }
+ return 1;
+}
+
+sub setfailed {
+ my ($label)=@_;
+ my $hintlabel=$label;
+ $hintlabel=~s/^R//;
+ push(@Apache::functionplotresponse::failedrules,$hintlabel);
+ &addlog("Set hint condition $hintlabel");
+}
+
+sub start_functionplotruleset {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ if ($target eq 'edit') {
+ return &Apache::edit::start_table($token).
+ '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Rule Set').'</span></td>'
+ .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
+ .&Apache::edit::deletelist($target,$token).' '.
+ &Apache::edit::insertlist($target,$token).' '
+ .&Apache::loncommon::help_open_topic('Function_Plot_Response_Rule_Set','Function Plot Rules')
+ .'</span></td>'
+ ."<td> "
+ .&Apache::edit::end_row()
+ .&Apache::edit::start_spanning_row()
+ ."\n";
+ }
+}
+
+sub end_functionplotruleset {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+ my $id=$Apache::inputtags::response[-1];
+ my $partid=$Apache::inputtags::part;
+ my $internalid = $partid.'_'.$id;
+
+ if ($target eq 'edit' ) {
+ return &Apache::edit::end_table();
+ } elsif ($target eq 'grade'
+ && &Apache::response::submitted()
+ && $Apache::lonhomework::type ne 'exam') {
+#
+# Actually grade
+#
+ my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
+
+ my $ad='';
+ undef %Apache::functionplotresponse::functionplotrulelabels;
+ $Apache::functionplotresponse::ruleslog='';
+ $Apache::functionplotresponse::functionplotrulelabels{'start'}=400;
+ $Apache::functionplotresponse::functionplotrulelabels{'end'}=0;
+ if (&populate_arrays($internalid,$xmin,$xmax) eq 'no_func') {
+ $ad='NOT_FUNCTION';
+ } else {
+ &addlog("Start of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'start'},$xmin,$xmax)." (index ".
+ $Apache::functionplotresponse::functionplotrulelabels{'start'}.")");
+ &addlog("End of function ".&actualval($Apache::functionplotresponse::functionplotrulelabels{'end'},$xmin,$xmax)." (index ".
+ $Apache::functionplotresponse::functionplotrulelabels{'end'}.")");
+
+# We have a function that we can actually grade, go through the spline rules.
+ foreach my $rule (@Apache::functionplotresponse::functionplotrules) {
+ unless (&functionplotrulecheck($rule,$xmin,$xmax,$ymin,$ymax)) {
+ $ad='INCORRECT';
+ last;
+ }
+ }
+# If it's not wrong, it's correct
+ unless ($ad) { $ad='EXACT_ANS' };
+ }
+ &addlog("Set hint conditions: ".join(",",@Apache::functionplotresponse::failedrules));
+ &addlog("Assigned award detail: $ad");
+# Store for later to be assigned at end_functionplotresponse
+ $Apache::functionplotresponse::awarddetail=$ad;
+ }
+}
+
+
sub end_functionplotresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
&Apache::response::end_response;
- pop @Apache::lonxml::namespace;
-# &Apache::lonxml::deregister('Apache::optionresponse',('foilgroup','foil','conceptgroup','drawoptionlist'));
+
my $result;
-# if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
- if ($target eq 'web') {
+ my $id=$Apache::inputtags::response[-1];
+ my $partid=$Apache::inputtags::part;
+ my $internalid = $partid.'_'.$id;
+
+ if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
+ if ($target eq 'grade'
+ && &Apache::response::submitted()
+ && $Apache::lonhomework::type eq 'exam') {
+
+ &Apache::response::scored_response($partid,$id);
+
+ } elsif ($target eq 'grade'
+ && &Apache::response::submitted()
+ && $Apache::lonhomework::type ne 'exam') {
+ my ($response,%coords)=&get_answer_from_form_fields($internalid);
+ $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
+ my %previous=&Apache::response::check_for_previous($response,$partid,$id);
+#
+# Assign grade
+#
+ my $ad=$Apache::functionplotresponse::awarddetail;
+#
+# Store grading info
+#
+ $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
+ &Apache::response::handle_previous(\%previous,$ad);
+ } elsif ($target eq 'web') {
+ undef @Apache::functionplotresponse::failedrules;
+ }
+ return $result;
+}
+
+sub end_functionplotelements {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+ my $result='';
+ my $id=$Apache::inputtags::response[-1];
+ my $partid=$Apache::inputtags::part;
+ my $internalid = $partid.'_'.$id;
+ if ($target eq 'edit' ) {
+ $result=&Apache::edit::end_table();
+ } elsif ($target eq 'web') {
+ my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
+
+# Are we in show answer mode?
+ my $showanswer=&Apache::response::show_answer();
+ if ($showanswer) {
+# Render answerdisplay
+ my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval,-2);
+ if ($answerdisplay=~/\S/s) {
+ foreach my $plot (split(/\s*\,\s*/,$answerdisplay)) {
+ my ($func,$xl,$xh)=split(/\s*\:\s*/,$plot);
+ if ((!defined($xl)) || ($xl eq '')) { $xl=$xmin; }
+ if ((!defined($xh)) || ($xh eq '')) { $xh=$xmax; }
+ $result.=&plot_script($internalid,$func,1,'','00aa00',$xl,$xh,6);
+ }
+ }
+ }
+ my $fixed=0;
+ if (($showanswer) || (&Apache::response::check_status()>=2)) { $fixed=1; }
+# Now is the time to render all of the stored splines
+ foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
+ $result.=&generate_spline($internalid,$label,$xmin,$xmax,$ymin,$ymax,$fixed);
+ }
+# close the init script
+ $result.=&end_init_script();
+# register all splines in this response
+ $result.='<input type="hidden" name="HWVAL_AllSplines_'.$internalid.'" value="'.
+ join(',',keys(%Apache::functionplotresponse::splineorder)).'" />'."\n";
+ foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
+ $result.='<input type="hidden" name="HWVAL_SplineOrder_'.$internalid.'_'.$label.'" value="'.
+ $Apache::functionplotresponse::splineorder{$label}.'" />'."\n";
+ }
+# generate the input fields
+ $result.=$Apache::functionplotresponse::inputfields;
+# actually start the <applet>-tag
+ $result.=&geogebra_startcode($internalid);
+# load the spline bytecode
+ $result.=&geogebra_spline_program();
+# set default parameters
+ $result.=&geogebra_default_parameters($internalid);
+# close the <applet>-tag
$result.=&geogebra_endcode();
}
return $result;
}
+
+sub boundaries {
+ my ($parstack,$safeeval,$level)=@_;
+ my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval,$level);
+ $xmin=(defined($xmin)?$xmin:-10);
+ my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval,$level);
+ $xmax=(defined($xmax)?$xmax:10);
+ my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval,$level);
+ $ymin=(defined($ymin)?$ymin:-10);
+ my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval,$level);
+ $ymax=(defined($ymax)?$ymax:10);
+ if ($xmax<=$xmin) {
+ $xmax=$xmin+20;
+ }
+ if ($ymax<=$ymin) {
+ $ymax=$ymin+20;
+ }
+ return ($xmin,$xmax,$ymin,$ymax);
+}
+
+sub start_functionplotelements {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result='';
+ my $id=$Apache::inputtags::response[-1];
+ my $partid=$Apache::inputtags::part;
+ my $internalid = $partid.'_'.$id;
+
+ if ($target eq 'edit') {
+ return &Apache::edit::start_table($token).
+ '<tr><td><span class="LC_nobreak">'.&mt('Function Plot Elements').'</span></td>'
+ .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
+ .&Apache::edit::deletelist($target,$token).' '.
+ &Apache::edit::insertlist($target,$token).' '
+ .&Apache::loncommon::help_open_topic('Function_Plot_Response_Elements','Function Plot Elements')
+ .'</span></td>'
+ ."<td> "
+ .&Apache::edit::end_row()
+ .&Apache::edit::start_spanning_row()
+ ."\n";
+ } elsif ($target eq 'web') {
+ my ($xmin,$xmax,$ymin,$ymax)=&boundaries($parstack,$safeeval,-2);
+ my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
+ my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
+ my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval,-2)=~/on|true|yes|1/i?'true':'false');
+ my $xlabel=&Apache::lonxml::get_param('xlabel',$parstack,$safeeval,-2);
+ my $ylabel=&Apache::lonxml::get_param('ylabel',$parstack,$safeeval,-2);
+
+
+# paste in the update routine to receive stuff back from the applet
+ $result.=&update_script($internalid);
+# start the initscript for this applet
+ $result.=&start_init_script($internalid);
+# put the axis commands inside
+ $result.=&axes_script($internalid,$xmin,$xmax,$ymin,$ymax,$xaxisvisible,$yaxisvisible,$gridvisible);
+ $result.=&axes_label($internalid,$xmin,$xmax,$ymin,$ymax,$xlabel,$ylabel);
+# init script is left open
+ }
+ return $result;
+}
1;