loncom/homework/functionplotresponse.pm - diff

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Diff for /loncom/homework/functionplotresponse.pm between versions 1.3 and 1.9

-version 1.3, 2010/10/04 18:28:53
+version 1.9, 2010/10/09 00:00:04
  Line 33  use Apache::lonlocal;
  use Apache::lonnet;
  BEGIN {
-   &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse'));
+   &Apache::lonxml::register('Apache::functionplotresponse',('functionplotresponse','backgroundplot','spline'));
  }
+ #
+ # 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);
- Line 49  sub geogebra_endcode {
+ Line 54  sub geogebra_endcode {
      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 ($id)=@_;
     return(<<ENDDEFAULTPARAMETERS);
- Line 82  sub geogebra_default_parameters {
+ Line 93  sub geogebra_default_parameters {
  ENDDEFAULTPARAMETERS
  }
+ #
+ # This subroutine is called by LON-CAPA at </problem>
+ # Each applet on the page will call function ggbOnInit when it is done loading
+ # This function in turn will call the respective function registered by start_init_script
+ # Which one of the registered functions is called is determined by ggbOnInitParam, which GeoGebra passes to ggbOnInit
+ #
  sub init_script {
     if ($Apache::functionplotresponse::callscripts) {
        return (<<ENDGGBINIT);
- Line 96  ENDGGBINIT
+ Line 114  ENDGGBINIT
     }
  }
+ #
+ # Each Geogebra applet is supposed to call this when parameters change
+ #
+ 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_$id');\n";
+ }
+ #
+ # Set a coordinate variable
+ #
+ sub set_coordinate {
+    my ($id,$variable,$x,$y)=@_;
+    return (<<ENDSETVARIABLE);
+ document.ggbApplet_$id.evalCommand("$variable=($x,$y)");
+ ENDSETVARIABLE
+ }
+ #
+ # Input field name for a coordinate variable
+ #
+ sub field_name {
+     my ($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='$y' />\n";
+ }
+ #
+ # Initialize a new coordinate variable at set a listener on it
+ #
+ sub new_coordinate {
+     my ($id,$variable,$x,$y)=@_;
+     &generate_input_field($id,$variable,$x,$y);
+     return &set_coordinate($id,$variable,$x,$y).&update_register($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 a line to ggbOnInit-function which calls the right function based on parameter passed from GeoGebra
      $Apache::functionplotresponse::callscripts.="if (param=='applet_$id') { ggbInit_$id(); }\n";
+ # ... and open this function
      return (<<ENDSTARTINIT);
  <script type="text/javascript">
  // <![CDATA[
+ // variable that will eventually be passed back to the server
+ var coordinateMap_$id = [];
+ // Init-function for applet
  function ggbInit_$id() {
-    alert("Hello $id");
  ENDSTARTINIT
  }
+ #
+ # This sets the axes inside ggbInit_$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 plot_script {
+    my ($id,$function,$fixed)=@_;
+    if ($fixed) {
+ # Use stupid trick to nail this to a location
+       return (<<ENDPLOTSCRIPT);
+             document.ggbApplet_$id.evalCommand("a=1");
+             document.ggbApplet_$id.setVisible("a",false);
+             // This MUST be a DEPENDENT OBJECT in order to be locked down:
+             document.ggbApplet_$id.evalCommand("y=a*($function)");
+ ENDPLOTSCRIPT
+    } else {
+        return "document.ggbApplet_$id.evalCommand('y=$function')";
+    }
+ }
+ #
+ # Subroutine that generates code for spline $label based on stored information
+ #
+ sub generate_spline {
+    my ($id,$label)=@_;
+    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) {
+        $result.=&new_coordinate($id,$label.'P'.$i,$x,$y);
+        $x+=$sx/(2.*($order-1));
+        push(@coords,$label.'P'.$i);
+        $result.=&new_coordinate($id,$label.'S'.$i,$x,$y+$sy);
+        $x+=$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 $fixed=(&Apache::lonxml::get_param('fixed',$parstack,$safeeval)=~/on|true|yes|1/i?1:0);
+    unless ($function) { $function="0"; }
+    if ($target eq 'web') {
+       $result.=&plot_script($internalid,$function,$fixed);
+    }
+    return $result;
+ }
+ sub end_backgroundplot {
+    return '';
+ }
+ #
+ # <spline label="..." order="1,2,3,4" initx="..." inity="..." scalex="..." scaley="..." />
+ #
+ # Unfortunately, GeoGebra seems to want all splines after everything else, so we need to store them
+ #
+ sub start_spline {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $label=&Apache::lonxml::get_param('label',$parstack,$safeeval);
+    $Apache::functionplotresponse::counter++;
+    unless ($label) { $label='S'.$Apache::functionplotresponse::counter; }
+    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}=$sy;
+    return '';
+ }
+ sub end_spline {
+    return '';
+ }
  sub end_init_script {
      return (<<ENDENDINIT);
  }
- Line 118  ENDENDINIT
+ Line 326  ENDENDINIT
  sub start_functionplotresponse {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result='';
+ # 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;
+   $Apache::functionplotresponse::inputfields='';
+   $Apache::functionplotresponse::counter=0;
+ # Internal ID to mark the applet and its coordinates
    my $internalid = $Apache::inputtags::part.'_'.&Apache::response::start_response($parstack,$safeeval);
+ # Parameters of <functionplotresponse>
    my $xmin=&Apache::lonxml::get_param('xmin',$parstack,$safeeval);
+   $xmin=($xmin?$xmin:-10);
    my $xmax=&Apache::lonxml::get_param('xmax',$parstack,$safeeval);
+   $xmax=($xmax?$xmax:10);
    my $ymin=&Apache::lonxml::get_param('ymin',$parstack,$safeeval);
+   $ymin=($ymin?$ymin:-10);
    my $ymax=&Apache::lonxml::get_param('ymax',$parstack,$safeeval);
-   my $xaxisvisible=&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval);
+   $ymax=($ymax?$ymax:10);
-   my $yaxisvisible=&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval);
+   my $xaxisvisible=(&Apache::lonxml::get_param('xaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
-   my $gridvisible=&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval);
+   my $yaxisvisible=(&Apache::lonxml::get_param('yaxisvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
+   my $gridvisible=(&Apache::lonxml::get_param('gridvisible',$parstack,$safeeval)=~/on|true|yes|1/i?'true':'false');
    if ($target eq 'web') {
+ # 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);
+ # init script is left open
    }
    return $result;
  }
- Line 143  sub end_functionplotresponse {
+ Line 370  sub end_functionplotresponse {
  #  if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
    if ($target eq 'web') {
+ # Now is the time to render all of the stored splines
+      foreach my $label (keys(%Apache::functionplotresponse::splineorder)) {
+         $result.=&generate_spline($internalid,$label);
+      }
+ # close the init script
       $result.=&end_init_script();
+ # 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;

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Removed from v.1.3
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	Added in v.1.9