--- loncom/homework/randomlabel.pm	2001/08/30 19:39:12	1.3
+++ loncom/homework/randomlabel.pm	2001/10/13 05:57:43	1.4
@@ -4,19 +4,19 @@
 # 8/10/2001 Isaac Tsai, 
 # 8/30/2001 Isaac Tsai, 
 # SYNTAX:
-# <randomlabel bgimg=URL code=JAVACLASS codebase=URL width=12 height=45>
-#    <labelgroup name=GroupOne type=image>
-#      <location x=123 y=456 />
-#      <location x=321 y=654 />
-#      <location x=213 y=546 />
-#      <label>IMG-URL</label>
-#      <label>IMG-URL</label>
-#      <label>IMG-URL</label>
+# <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
+#    <labelgroup name="GroupOne" type="image">
+#      <location x="123" y="456" />
+#      <location x="321" y="654" />
+#      <location x="213" y="546" />
+#      <label description="TEXT-1">IMG-URL</label>
+#      <label description="TEXT-2">IMG-URL</label>
+#      <label description="TEXT-3">IMG-URL</label>
 #    </labelgroup>
-#    <labelgroup name=GroupTwo type=text>
-#      <location x=12 y=45 />
-#      <location x=32 y=65 />
-#      <location x=21 y=54 />
+#    <labelgroup name="GroupTwo" type="text">
+#      <location x="12" y="45" />
+#      <location x="32" y="65" />
+#      <location x="21" y="54" />
 #      <label>TEXT-1</label>
 #      <label>TEXT-2</label>
 #      <label>TEXT-3</label>
@@ -46,15 +46,33 @@ sub start_randomlabel {
   my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
   my $w= &Apache::lonxml::get_param('width',$parstack,$safeeval);
   my $h= &Apache::lonxml::get_param('height',$parstack,$safeeval);
-  
+  my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
+  if (!$code) { $code='GLabel.class'; }
+  if (!$codebase) { $codebase='/res/adm/includes/'; }
   $Apache::randomlabel::tlabel_cnt=0;
   $Apache::randomlabel::ilabel_cnt=0;
   if ($target eq 'web') {
-    $result.="<applet code=$code codebase=$codebase width=\"$w\" height=\"$h\">";
+    $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">";
     $result.="<param name=\"bgimg\" value=\"$bgimg\">";
+  } elsif ($target eq 'tex') {
+    $bgimg=~s/(.gif|.jpg)$/.ps/;
+    $result.='\vspace*{2mm} \\ \noindent \epsfxsize='.$texwidth.' \epsffile{'.
+      $bgimg.'}\setlength{\unitlength}{1mm} \\ \begin{picture}(0,0)(0,-5)';
   } elsif ($target eq 'edit') {
+    $result.=&Apache::edit::tag_start($target,$token);
+    $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).'<br />'.
+      &Apache::edit::text_arg('Width(pixel):','width',$token,4).
+	&Apache::edit::text_arg('Height(pixel):','height',$token,4).
+	  &Apache::edit::text_arg('TeXWidth(mm):','texwidth',$token,4).
+	    '</td></tr><tr><td colspan="3">';
   } elsif ($target eq 'modified') {
-  } else {
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
+						 'bgimg','width','height',
+						 'texwidth');
+    if ($constructtag) {
+      $result = &Apache::edit::rebuild_tag($token);
+      $result.=&Apache::edit::handle_insert();
+    }
   }
   return $result;
 }
@@ -64,16 +82,17 @@ sub end_randomlabel {
   my $result='';
   my $count;
 
-  $count = $Apache::randomlabel::tlabel_cnt;
-  if( $count != 0) {
-    $result.= "<param name=\"count\" value=\"$count\">";
-  }
-  $count = $Apache::randomlabel::ilabel_cnt;
-  if( $count != 0) {
-    $result.= "<param name=\"icount\" value=\"$count\">";
-  }
+
   if ($target eq 'web') {
+    $count = $Apache::randomlabel::tlabel_cnt;
+    if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
+    $count = $Apache::randomlabel::ilabel_cnt;
+    if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
     $result .= "</applet><BR />";
+  } elsif ($target eq 'tex') {
+    $result='\end{picture}';
+  } elsif ($target eq 'edit') {
+    $result.=&Apache::edit::end_table;
   }
   return $result;
 }
@@ -84,58 +103,114 @@ sub start_labelgroup {
   my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
   my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
   $type =~tr/A-Z/a-z/;
-  $Apache::randomlabel::groupname=$name;
-  $Apache::randomlabel::type=$type;
-  @Apache::randomlabel::xcoord = ();
-  @Apache::randomlabel::ycoord = ();
-  @Apache::randomlabel::label_arr  = ();
+  if ($target eq 'web' || $target eq 'tex') {
+    $Apache::randomlabel::groupname=$name;
+    $Apache::randomlabel::type=$type;
+    @Apache::randomlabel::xcoord = ();
+    @Apache::randomlabel::ycoord = ();
+    @Apache::randomlabel::label_arr  = ();
+  } elsif ($target eq 'edit') {
+    $result.=&Apache::edit::tag_start($target,$token);
+    $result.=&Apache::edit::text_arg('Name:','name',$token).
+      &Apache::edit::select_arg('Type:','type',['text','image'],$token).
+	'</td></tr><tr><td colspan="3">';
+  } elsif ($target eq 'modified') {
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
+						 'name','type');
+    if ($constructtag) {
+      $result = &Apache::edit::rebuild_tag($token);
+      $result.=&Apache::edit::handle_insert();
+    }
+  }
   return $result;
 }
 
+sub add_var {
+  my ($name,$value,$type,$safeeval) = @_;
+  if ($type eq 'array') {
+    my $code = 'push(@'.$name.',\''.$value.'\');';
+    my $out=Apache::run::run($code,$safeeval);
+  } else {
+    &Apache::lonxml::error('Unsupported add_var type :'.$type.':');
+  }
+}
 # begin to assign labels to locations
 sub end_labelgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $gname = $Apache::randomlabel::groupname;
-  my $count;
   my $type  = $Apache::randomlabel::type;
-  my $code;
-  my $out;
-  my $label;
-  my $x;
-  my $y;
-  my $text='';
-  my $str;
-  my $xstr;
-  my $ystr;
-
-  my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
-  &Apache::structuretags::shuffle(\@idx_arr);
-  for(0 .. $#Apache::randomlabel::label_arr) {
-    $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
-    if( $type eq 'text') {
-      $code = "push(\@$gname, $label);" ;
-      $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
-      $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
-      $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
-      $Apache::randomlabel::tlabel_cnt += 1;
-    } elsif ( $type eq 'image') {
-      $code = "push(\@$gname, $idx_arr[$_]);" ;
-      $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
-      $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
-      $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
-      $Apache::randomlabel::ilabel_cnt += 1;
-    } else {
+  my $result='';
+  if ($target eq 'web') {
+    my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
+    &Apache::structuretags::shuffle(\@idx_arr);
+    for(0 .. $#Apache::randomlabel::label_arr) {
+      my $str;
+      my $xstr;
+      my $ystr;
+      my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
+      if( $type eq 'text') {
+	&add_var($gname,$label,'array',$safeeval);
+	$str = 'LB'.$Apache::randomlabel::tlabel_cnt;
+	$xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
+	$ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
+	$Apache::randomlabel::tlabel_cnt += 1;
+      } elsif ( $type eq 'image') {
+	&add_var($gname,$idx_arr[$_],'array',$safeeval);
+	$str = 'LB'.$Apache::randomlabel::ilabel_cnt;
+	$xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
+	$ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
+	$Apache::randomlabel::ilabel_cnt += 1;
+      } else {
+	&Apache::lonxml::error('Unknown type of label :'.$type.':');
+      }
+      my $x = $Apache::randomlabel::xcoord[$_];
+      my $y = $Apache::randomlabel::ycoord[$_];
+      $result .= '<param name="' . $str  . '" value="'.$label.'">';
+      $result .= '<param name="' . $xstr . '" value="'.$x.'">';
+      $result .= '<param name="' . $ystr . '" value="'.$y.'">';
     }
-    # $x = pop @Apache::randomlabel::xcoord;
-    # $y = pop @Apache::randomlabel::ycoord;
-    $x = $Apache::randomlabel::xcoord[$_];
-    $y = $Apache::randomlabel::ycoord[$_];
-    $text .= "<param name=\"" . $str  . "\" value=\"$label\">";
-    $text .= "<param name=\"" . $xstr . "\" value=\"$x\"> ";
-    $text .= "<param name=\"" . $ystr . "\" value=\"$y\">";
-    $out=Apache::run::run($code,$safeeval);
+  } elsif ($target eq 'tex') {
+    my $WX1=0; #  Web x-coord. of upper left corner (ULC)
+    my $WY1=0; #  Web y-coord. of (ULC)
+    my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
+    my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
+    my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
+    my $TX1=0;
+    my $TY1=$texwidth*($wheight/$wwidth);
+    my $TX2=$texwidth;
+    my $TY2=0;
+
+
+    my $slopex=($wwidth-$WX1)/($TX2-$TX1);
+    my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
+    my $cstx=$wwidth-$slopex*($TX2);
+    my $csty=$wheight-$slopey*($TY2);
+
+    my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
+    &Apache::structuretags::shuffle(\@idx_arr);
+
+    &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
+    for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
+      my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
+      my $x = $Apache::randomlabel::xcoord[$i];
+      my $y = $Apache::randomlabel::ycoord[$i];
+      my $tcX=$x*($texwidth/$wwidth);
+      my $tcY=$TY1-$y*($TY1/$wheight)-2;
+      $tcX=sprintf('%.2f',$tcX);
+      $tcY=sprintf('%.2f',$tcY);
+      $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
+      if( $type eq 'text') {
+	&add_var($gname,$label,'array',$safeeval);
+      } elsif ( $type eq 'image') {
+	&add_var($gname,$idx_arr[$i],'array',$safeeval);
+      } else {
+	&Apache::lonxml::error('Unknown type of label :'.$type.':');
+      }
+    }
+  } elsif ($target eq 'edit') {
+    $result.=&Apache::edit::end_table;
   }
-  return $text;
+  return $result;
 }
 
 # <location x=123 y=456 />
@@ -144,33 +219,57 @@ sub start_location {
   my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
   my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
   my $result='';
-  
   push(@Apache::randomlabel::xcoord,$x);
-  push(@Apache::randomlabel::ycoord,$y); 
+  push(@Apache::randomlabel::ycoord,$y);
+  if ($target eq 'edit') {
+    $result.=&Apache::edit::tag_start($target,$token);
+    $result.=&Apache::edit::text_arg('X:','x',$token,4).
+      &Apache::edit::text_arg('Y:','y',$token,4).
+	'</td></tr><tr><td colspan="3">';
+    $result.=&Apache::edit::end_table;
+  } elsif ($target eq 'modified') {
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
+						 'x','y');
+    if ($constructtag) {
+      $result = &Apache::edit::rebuild_tag($token);
+      $result.=&Apache::edit::handle_insert();
+    }
+  }
   return $result;
 }
 
 sub end_location {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  my $result='';
-  return $result;
+  my @result;
+  if ($target eq 'edit') { @result=('','no') }
+  return @result;
 }
 
 # <label>$var_abc</label>
 sub start_label {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[$#$parser]);
   my $result='';
-
-  push(@Apache::randomlabel::label_arr,$ltext);
+  if ($target eq 'web' || $target eq 'tex') {
+    my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
+    push(@Apache::randomlabel::label_arr,$ltext);
+  } elsif ($target eq 'edit') {
+    $result.=&Apache::edit::tag_start($target,$token);
+    my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
+    $result.='</td></tr><tr><td colspan="3">'.
+      &Apache::edit::editfield('',$text,'',20,1).
+	&Apache::edit::end_table();
+  } elsif ($target eq 'modified') {
+    my $text=$$parser[-1]->get_text("/label");
+    $result.=&Apache::edit::modifiedfield($token);
+  }
   return $result;
 }
 
 sub end_label {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  my $result='';
-
-  return $result;
+  my @result;
+  if ($target eq 'edit') { @result=('','no') }
+  return @result;
 }