High-Order ASCII Alphabet & Other Keyboard Edits

Sat Dec 20 15:04:08 EST 2003

On Saturday, December 20, 2003, at 10:11  AM, Rob Cozens wrote:

> There is an alphabet for every language.  There must be a way to 
> filter keyboard input to reject keys that are not part of the 
> alphabet, or a subset thereof.
>
> This is not an issue of key translation between two computers; rather 
> the focus is on filtering keyboard input on the user's computer to 
> reject keystrokes that are defined as illegal for the current input 
> field.
> -- 
>
> Rob Cozens

Rob,

I use a trick to find characters that are higher than ascii 127. I use 
a repeat loop to place all 255 numToChars(i) separated by a space into 
an off screen field. I then put the HTMLText of that field into a 
variable. I now have escape-sequences for these chars that I can use in 
an array created with the split function.

 From this :
  ¦  ² ³ ¹  	
  ¼ ½
  ¾ Ð × Ý Þ ð ý þ       

    ! " # $ % & ' ( ) * + , - . / 0 
1 2 3 4 5 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T 
U V W X Y Z [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x 
y z { | } ~  Ä Å Ç É Ñ Ö Ü á à â ä ã å ç é è ê ë í ì î ï ñ ó ò ô ö õ ú 
ù û ü  ° ¢ £ §  ¶ ß ® ©  ´ ¨  Æ Ø  ±   ¥ µ      ª º  æ ø ¿ 
¡ ¬     « » 
   À Ã Õ         ÷ 
 ÿ  
 ¤   
   ·    
Â Ê Á Ë È Í Î Ï Ì Ó Ô  Ò Ú Û Ù    ¯    ¸   

I get this :
<p>&#138; &#154; &brvbar; &shy; &sup2; &sup3; &sup1; &#8; &#9; </p>
<p> &frac14; &frac12; &#13; &frac34; &ETH; &times; &Yacute; &THORN; 
&eth; &yacute; &thorn; &#22; &#23; &#24; &#25; &#26; &#27; &#28; &#29; 
&#30; &#31;   ! &quot; # $ % &amp; ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 
9 : ; &lt; = &gt; ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y 
Z [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } 
~ &#127; &Auml; &Aring; &Ccedil; &Eacute; &Ntilde; &Ouml; &Uuml; 
&aacute; &agrave; &acirc; &auml; &atilde; &aring; &ccedil; &eacute; 
&egrave; &ecirc; &euml; &iacute; &igrave; &icirc; &iuml; &ntilde; 
&oacute; &ograve; &ocirc; &ouml; &otilde; &uacute; &ugrave; &ucirc; 
&uuml; &#134; &deg; &cent; &pound; &sect; &#149; &para; &szlig; &reg; 
&copy; &#153; &acute; &uml; &#14; &AElig; &Oslash; &#15; &plusmn; &#16; 
&#17; &yen; &micro; &#18; &#19; &#20; &#21; &#22; &ordf; &ordm; &#23; 
&aelig; &oslash; &iquest; &iexcl; &not; &#24; &#131; &#25; &#27; 
&laquo; &raquo; &#133; &nbsp; &Agrave; &Atilde; &Otilde; &#140; &#156; 
&#150; &#151; &#147; &#148; &#145; &#146; &divide; &#28; &yuml; &#159; 
&#29; &curren; &#139; &#155; &#30; &#31; &#135; &middot; &#130; &#132; 
&#137; &Acirc; &Ecirc; &Aacute; &Euml; &Egrave; &Iacute; &Icirc; &Iuml; 
&Igrave; &Oacute; &Ocirc; &#128; &Ograve; &Uacute; &Ucirc; &Ugrave; 
&#129; &#136; &#152; &macr; &#141; &#142; &#143; &cedil; &#144; &#157; 
&#158; </p>

With that I can create a char map for conversion between OS 
differences. Perhaps a char mapping process can help you set up a key 
control handler. This works for me because I'm using HTMLText to store 
data.

Mark