Annotation of loncom/homework/randomlabel.pm, revision 1.4
1.1 tsai 1: # The LearningOnline Network with CAPA
2: # random labelling tool
1.3 tsai 3: # 7/20/2001 Isaac Tsai, initial syntax
4: # 8/10/2001 Isaac Tsai,
5: # 8/30/2001 Isaac Tsai,
1.1 tsai 6: # SYNTAX:
1.4 ! albertel 7: # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
! 8: # <labelgroup name="GroupOne" type="image">
! 9: # <location x="123" y="456" />
! 10: # <location x="321" y="654" />
! 11: # <location x="213" y="546" />
! 12: # <label description="TEXT-1">IMG-URL</label>
! 13: # <label description="TEXT-2">IMG-URL</label>
! 14: # <label description="TEXT-3">IMG-URL</label>
1.1 tsai 15: # </labelgroup>
1.4 ! albertel 16: # <labelgroup name="GroupTwo" type="text">
! 17: # <location x="12" y="45" />
! 18: # <location x="32" y="65" />
! 19: # <location x="21" y="54" />
1.3 tsai 20: # <label>TEXT-1</label>
21: # <label>TEXT-2</label>
22: # <label>TEXT-3</label>
1.1 tsai 23: # </labelgroup>
24: # </randomlabel>
25: # ===========================================
1.3 tsai 26: # side effect:
27: # location (123,456): $GroupOne[0] = 2 # images give out indexes
28: # (321,654): $GroupOne[1] = 1
29: # (213,546): $GroupOne[2] = 0
30: # location (12,45) : $GroupTwo[0] = "TEXT-3"
31: # (32,65) : $GroupTwo[1] = "TEXT-1"
32: # (21,54) : $GroupTwo[2] = "TEXT-2"
1.1 tsai 33: # ===========================================
34: package Apache::randomlabel;
35: use strict;
36:
37: sub BEGIN {
38: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
39: }
40:
41: sub start_randomlabel {
42: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
43: my $result='';
44: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
45: my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
46: my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
47: my $w= &Apache::lonxml::get_param('width',$parstack,$safeeval);
48: my $h= &Apache::lonxml::get_param('height',$parstack,$safeeval);
1.4 ! albertel 49: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
! 50: if (!$code) { $code='GLabel.class'; }
! 51: if (!$codebase) { $codebase='/res/adm/includes/'; }
1.3 tsai 52: $Apache::randomlabel::tlabel_cnt=0;
53: $Apache::randomlabel::ilabel_cnt=0;
54: if ($target eq 'web') {
1.4 ! albertel 55: $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">";
1.3 tsai 56: $result.="<param name=\"bgimg\" value=\"$bgimg\">";
1.4 ! albertel 57: } elsif ($target eq 'tex') {
! 58: $bgimg=~s/(.gif|.jpg)$/.ps/;
! 59: $result.='\vspace*{2mm} \\ \noindent \epsfxsize='.$texwidth.' \epsffile{'.
! 60: $bgimg.'}\setlength{\unitlength}{1mm} \\ \begin{picture}(0,0)(0,-5)';
1.3 tsai 61: } elsif ($target eq 'edit') {
1.4 ! albertel 62: $result.=&Apache::edit::tag_start($target,$token);
! 63: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).'<br />'.
! 64: &Apache::edit::text_arg('Width(pixel):','width',$token,4).
! 65: &Apache::edit::text_arg('Height(pixel):','height',$token,4).
! 66: &Apache::edit::text_arg('TeXWidth(mm):','texwidth',$token,4).
! 67: '</td></tr><tr><td colspan="3">';
1.3 tsai 68: } elsif ($target eq 'modified') {
1.4 ! albertel 69: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
! 70: 'bgimg','width','height',
! 71: 'texwidth');
! 72: if ($constructtag) {
! 73: $result = &Apache::edit::rebuild_tag($token);
! 74: $result.=&Apache::edit::handle_insert();
! 75: }
1.1 tsai 76: }
77: return $result;
78: }
79:
80: sub end_randomlabel {
1.3 tsai 81: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
82: my $result='';
83: my $count;
84:
1.4 ! albertel 85:
1.3 tsai 86: if ($target eq 'web') {
1.4 ! albertel 87: $count = $Apache::randomlabel::tlabel_cnt;
! 88: if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
! 89: $count = $Apache::randomlabel::ilabel_cnt;
! 90: if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
1.3 tsai 91: $result .= "</applet><BR />";
1.4 ! albertel 92: } elsif ($target eq 'tex') {
! 93: $result='\end{picture}';
! 94: } elsif ($target eq 'edit') {
! 95: $result.=&Apache::edit::end_table;
1.3 tsai 96: }
97: return $result;
1.1 tsai 98: }
99:
100: sub start_labelgroup {
101: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
102: my $result='';
103: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
104: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
1.2 tsai 105: $type =~tr/A-Z/a-z/;
1.4 ! albertel 106: if ($target eq 'web' || $target eq 'tex') {
! 107: $Apache::randomlabel::groupname=$name;
! 108: $Apache::randomlabel::type=$type;
! 109: @Apache::randomlabel::xcoord = ();
! 110: @Apache::randomlabel::ycoord = ();
! 111: @Apache::randomlabel::label_arr = ();
! 112: } elsif ($target eq 'edit') {
! 113: $result.=&Apache::edit::tag_start($target,$token);
! 114: $result.=&Apache::edit::text_arg('Name:','name',$token).
! 115: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
! 116: '</td></tr><tr><td colspan="3">';
! 117: } elsif ($target eq 'modified') {
! 118: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
! 119: 'name','type');
! 120: if ($constructtag) {
! 121: $result = &Apache::edit::rebuild_tag($token);
! 122: $result.=&Apache::edit::handle_insert();
! 123: }
! 124: }
1.3 tsai 125: return $result;
1.1 tsai 126: }
127:
1.4 ! albertel 128: sub add_var {
! 129: my ($name,$value,$type,$safeeval) = @_;
! 130: if ($type eq 'array') {
! 131: my $code = 'push(@'.$name.',\''.$value.'\');';
! 132: my $out=Apache::run::run($code,$safeeval);
! 133: } else {
! 134: &Apache::lonxml::error('Unsupported add_var type :'.$type.':');
! 135: }
! 136: }
1.1 tsai 137: # begin to assign labels to locations
138: sub end_labelgroup {
139: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
140: my $gname = $Apache::randomlabel::groupname;
1.2 tsai 141: my $type = $Apache::randomlabel::type;
1.4 ! albertel 142: my $result='';
! 143: if ($target eq 'web') {
! 144: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
! 145: &Apache::structuretags::shuffle(\@idx_arr);
! 146: for(0 .. $#Apache::randomlabel::label_arr) {
! 147: my $str;
! 148: my $xstr;
! 149: my $ystr;
! 150: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
! 151: if( $type eq 'text') {
! 152: &add_var($gname,$label,'array',$safeeval);
! 153: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
! 154: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
! 155: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
! 156: $Apache::randomlabel::tlabel_cnt += 1;
! 157: } elsif ( $type eq 'image') {
! 158: &add_var($gname,$idx_arr[$_],'array',$safeeval);
! 159: $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
! 160: $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
! 161: $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
! 162: $Apache::randomlabel::ilabel_cnt += 1;
! 163: } else {
! 164: &Apache::lonxml::error('Unknown type of label :'.$type.':');
! 165: }
! 166: my $x = $Apache::randomlabel::xcoord[$_];
! 167: my $y = $Apache::randomlabel::ycoord[$_];
! 168: $result .= '<param name="' . $str . '" value="'.$label.'">';
! 169: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
! 170: $result .= '<param name="' . $ystr . '" value="'.$y.'">';
1.3 tsai 171: }
1.4 ! albertel 172: } elsif ($target eq 'tex') {
! 173: my $WX1=0; # Web x-coord. of upper left corner (ULC)
! 174: my $WY1=0; # Web y-coord. of (ULC)
! 175: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
! 176: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
! 177: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
! 178: my $TX1=0;
! 179: my $TY1=$texwidth*($wheight/$wwidth);
! 180: my $TX2=$texwidth;
! 181: my $TY2=0;
! 182:
! 183:
! 184: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
! 185: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
! 186: my $cstx=$wwidth-$slopex*($TX2);
! 187: my $csty=$wheight-$slopey*($TY2);
! 188:
! 189: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
! 190: &Apache::structuretags::shuffle(\@idx_arr);
! 191:
! 192: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
! 193: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
! 194: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
! 195: my $x = $Apache::randomlabel::xcoord[$i];
! 196: my $y = $Apache::randomlabel::ycoord[$i];
! 197: my $tcX=$x*($texwidth/$wwidth);
! 198: my $tcY=$TY1-$y*($TY1/$wheight)-2;
! 199: $tcX=sprintf('%.2f',$tcX);
! 200: $tcY=sprintf('%.2f',$tcY);
! 201: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
! 202: if( $type eq 'text') {
! 203: &add_var($gname,$label,'array',$safeeval);
! 204: } elsif ( $type eq 'image') {
! 205: &add_var($gname,$idx_arr[$i],'array',$safeeval);
! 206: } else {
! 207: &Apache::lonxml::error('Unknown type of label :'.$type.':');
! 208: }
! 209: }
! 210: } elsif ($target eq 'edit') {
! 211: $result.=&Apache::edit::end_table;
1.1 tsai 212: }
1.4 ! albertel 213: return $result;
1.1 tsai 214: }
215:
1.2 tsai 216: # <location x=123 y=456 />
1.1 tsai 217: sub start_location {
218: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
219: my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
220: my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
1.3 tsai 221: my $result='';
1.1 tsai 222: push(@Apache::randomlabel::xcoord,$x);
1.4 ! albertel 223: push(@Apache::randomlabel::ycoord,$y);
! 224: if ($target eq 'edit') {
! 225: $result.=&Apache::edit::tag_start($target,$token);
! 226: $result.=&Apache::edit::text_arg('X:','x',$token,4).
! 227: &Apache::edit::text_arg('Y:','y',$token,4).
! 228: '</td></tr><tr><td colspan="3">';
! 229: $result.=&Apache::edit::end_table;
! 230: } elsif ($target eq 'modified') {
! 231: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
! 232: 'x','y');
! 233: if ($constructtag) {
! 234: $result = &Apache::edit::rebuild_tag($token);
! 235: $result.=&Apache::edit::handle_insert();
! 236: }
! 237: }
1.3 tsai 238: return $result;
1.1 tsai 239: }
240:
241: sub end_location {
1.3 tsai 242: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.4 ! albertel 243: my @result;
! 244: if ($target eq 'edit') { @result=('','no') }
! 245: return @result;
1.1 tsai 246: }
247:
1.2 tsai 248: # <label>$var_abc</label>
1.1 tsai 249: sub start_label {
250: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.3 tsai 251: my $result='';
1.4 ! albertel 252: if ($target eq 'web' || $target eq 'tex') {
! 253: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
! 254: push(@Apache::randomlabel::label_arr,$ltext);
! 255: } elsif ($target eq 'edit') {
! 256: $result.=&Apache::edit::tag_start($target,$token);
! 257: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
! 258: $result.='</td></tr><tr><td colspan="3">'.
! 259: &Apache::edit::editfield('',$text,'',20,1).
! 260: &Apache::edit::end_table();
! 261: } elsif ($target eq 'modified') {
! 262: my $text=$$parser[-1]->get_text("/label");
! 263: $result.=&Apache::edit::modifiedfield($token);
! 264: }
1.3 tsai 265: return $result;
1.1 tsai 266: }
267:
268: sub end_label {
1.3 tsai 269: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.4 ! albertel 270: my @result;
! 271: if ($target eq 'edit') { @result=('','no') }
! 272: return @result;
1.1 tsai 273: }
274:
275:
276:
277: 1;
278: __END__
279:
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