Question

picklist.js

Asked by: knightEknight

<!-- per request, I am posting this into the public domain. -->




<HTML>
<HEAD>

<!--  1) Copy-n-paste the code between the SCRIPT tags to a file called "picklist.js"  -->
<!--  2) Include the following in your page: <SCRIPT language="javascript" src="picklist.js" ></SCRIPT>  -->
<!--  3) See the BODY tag, and the comment NOTEs in the form below for setup instructions.  -->

<SCRIPT language='javascript'>


    ////////////////////////////////////////////////////////////////////////////////
   ///// ///    Picklist.js -- (C) 1999,2003 by Ralph L. Brown (akakEk)     ///// ///
  /////   ///   This script, with copyright notice intact, may be freely   /////   ///
 /////     ///  distributed and used for any legal and legitimate         /////     ///
  /////   ///   purpose(s) except for the distribution of unsolicited      /////   ///
   ///// ///    email (spam) and the publication of pornographic content.   ///// ///
    ////////////////////////////////////////////////////////////////////////////////


var UNDEFINED;  // do not assign!

function getX(obj)
{
   return( obj.offsetParent==null ? obj.offsetLeft : obj.offsetLeft+getX(obj.offsetParent) );
}

function getY(obj)
{
   return( obj.offsetParent==null ? obj.offsetTop : obj.offsetTop+getY(obj.offsetParent) );
}

function isvalidchar(achar,validstr)
{
   if ( !validstr ) validstr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 `~!@#$%^&*()_-+={}[]|:;'<>,./?\\\"";
   return( validstr.toUpperCase().indexOf(achar.toString().toUpperCase(),0) >= 0 );
}

function getQualifiedName(formElement)
{
   var formName = formElement.form.name;
   if ( formName=="" ) formName=0;  // best guess since it is indeterminate for netscape
   return 'document.forms["' + formName + '"].elements["' + formElement.name + '"]';
}


function getTooltipDiv()
{
   if ( document.getElementById )
      return document.getElementById('divPicklistTooltip');
   else if ( document.all )
      return document.all.divPicklistTooltip;
   else return null;
}


function createTooltipDiv(objSel)
{
   if ( !getTooltipDiv() )  // if this is the first time this function is
   {                        // called then create the tooltip text window.
      var tooltipDiv = "<DIV id='divPicklistTooltip' style='position:absolute;top:0px;left:0px;visibility:hidden'></div>";

      if ( document.body.insertAdjacentHTML )
      {
         document.body.insertAdjacentHTML("beforeEnd",tooltipDiv);
      }
      else if ( document.body.innerHTML )
      {
         document.body.innerHTML += tooltipDiv;
      }

      // necessary for netscape (don`t know why)
      setTimeout( "setupPicklist(" + getQualifiedName(objSel) + ")", 1 );

      return true;
   }

   return false;
}


function showTooltipText(objSel)
{
   if ( !objSel || objSel.Y==UNDEFINED )  // null or not setup
   {
      return false;
   }

   var divPicklistTooltip = getTooltipDiv();
   var s = divPicklistTooltip.innerHTML = "";

   with ( objSel )
   {
      if ( strKeyInBuf=="" && title.length )
      {
         s = '<FONT color="blue">' + title + '</font>';
      }
      else if ( selectedIndex>=0 && strKeyInBuf==options[selectedIndex].text )  // unique match found
      {
         s = '<B>' + strKeyInBuf + '</b>';
      }
      else
      {
         var c = strKeyInBuf.substring(strKeyInBuf.length-1,strKeyInBuf.length);
         c = ( c == ' ' ) ? '&nbsp;' : '<B>' + c + '</b>';
         s = strKeyInBuf.substring(0,strKeyInBuf.length-1) + c;
      }

      divPicklistTooltip.innerHTML = '<TABLE cellpadding=0 cellspacing=0 style="background-color:INFOBACKGROUND;'
        + 'font:8pt ms sans serif;padding:2px 2px 2px 2px;color:INFOTEXT;border:1px solid INFOTEXT;">'
        + '<TR><TD align="left"><NOBR>'+s+'</nobr></td></tr></table>';

      divPicklistTooltip.style.posLeft = divPicklistTooltip.style.left = X;
      divPicklistTooltip.style.posTop  = divPicklistTooltip.style.top  = Y;
      divPicklistTooltip.style.visibility = "";

   } // end with

   return true;
}


function hideTooltipText(objSel)
{
   if (objSel) objSel.strKeyInBuf = "";
   var divPicklistTooltip = getTooltipDiv();
   return divPicklistTooltip.innerHTML = "";
}


function findSelectEntry( objSel, head, tail )  // uses divide-and-conquer search, assumes sorted list
{
   with ( objSel )
   {
      if ( options.length <= 0 )
      {
         strKeyInBuf = ' <FONT color="red">No selections available.</font> ';
         showTooltipText(objSel);
         top.status = strKeyInBuf = "";
         return -1;
      }

      if ( strKeyInBuf == "" )
      {
         showTooltipText(objSel);
         return( selectedIndex = options[selectedIndex=0].text.length ? -1 : 0 );
      }

      if (head==UNDEFINED) head = 0;
      if (tail==UNDEFINED) tail = options.length-1;

      var mid = Math.round( (head+tail)/2 );

      if ( strKeyInBuf.toUpperCase() == options[mid].text.substring(0,strKeyInBuf.length).toUpperCase() )
      {
         while ( (mid>0)  &&  strKeyInBuf.toUpperCase() == options[mid-1].text.substring(0,strKeyInBuf.length).toUpperCase() )
         {
            mid--;  // get the topmost matching item in the list, not just the first found
         }

         selectedIndex = mid;

         top.status = strKeyInBuf = options[mid].text.substring(0,strKeyInBuf.length);

         if ( mid == Math.round( (head+tail)/2 ) )  // if the original mid is an exact match
         {
            if ( (mid==tail) || ( (mid<tail) && strKeyInBuf.toUpperCase() != options[mid+1].text.substring(0,strKeyInBuf.length).toUpperCase() ) )
            {
               top.status = strKeyInBuf = options[mid].text;  // unique match found
            }
         }

         showTooltipText(objSel);

         return selectedIndex;
      }

      if ( head >= tail )  // then since no exact match was found, go back to previous strKeyInBuf (thus the length-1)
      {
         strKeyInBuf = strKeyInBuf.substring(0,strKeyInBuf.length-1)
         return findSelectEntry( objSel );
      }

      if ( strKeyInBuf.toUpperCase() < options[mid].text.substring(0,strKeyInBuf.length).toUpperCase() )
      {
         return findSelectEntry( objSel, head, Math.max(head,mid-1) );
      }

      return findSelectEntry( objSel, Math.min(mid+1,tail), tail );
   }  // end with
}


function picklistFocusHandler(e)
{
   var event = e ? e : window.event;  // to handle both NS and IE events
   var objSel = event.target ? event.target : event.srcElement;
   picklistFocusHandler.objSel = objSel;

   // update data elements
   objSel.X = getX(objSel)+2;
   objSel.Y = getY(objSel)-20;
   objSel.strKeyInBuf = "";

   // display the tooltip help (the title attribute by default)
   showTooltipText(objSel);
}


function picklistBlurHandler(e)
{
   var event = e ? e : window.event;  // to handle both NS and IE events
   var objSel = event.target ? event.target : event.srcElement;
   picklistFocusHandler.objSel = null;

   top.status = (objSel.selectedIndex>-1) ? objSel.options[objSel.selectedIndex].text : "";
   hideTooltipText(objSel);

   return true;
}


function picklistMouseOverHandler(e)
{
   var event = e ? e : window.event;  // to handle both NS and IE events
   var objSel = event.target ? event.target : event.srcElement;

   showTooltipText(objSel);

   return true;
}


function picklistMouseOutHandler(e)
{
   var event = e ? e : window.event;  // to handle both NS and IE events
   var objSel = event.target ? event.target : event.srcElement;

   if ( objSel==picklistFocusHandler.objSel || objSel==document.activeElement )
      return true;

   hideTooltipText();

   return true;
}


function picklistKeyDownHandler(e)
{
   var event = e ? e : window.event;  // to handle both NS and IE events
   var objSel = event.target ? event.target : event.srcElement;
   var divPicklistTooltip = getTooltipDiv();

   with ( objSel )
   {
      // this is to correct the search bug when the list is left open after single-click
      if ( strKeyInBuf=="" && event.keyCode>40 )
      {
         objSel.blur();
         objSel.focus();
      }

      switch(event.keyCode)
      {
        case(8):  // backspace
        {
           if ( selectedIndex>=0 && strKeyInBuf==options[selectedIndex].text )
           {
              top.status = strKeyInBuf = "";
           }
           else
           {
              top.status = strKeyInBuf = strKeyInBuf.substring(0,strKeyInBuf.length-1);
           }

           selectedIndex = findSelectEntry(objSel);

           event.keyCode = 0;
           return false;
        }

        case(9):   // tab
        case(13):  // enter
        {
           event.keyCode = 9;  // convert enter to tab
           return true;
        }

        case(27):  // escape
        {
           top.status = strKeyInBuf = "";
           selectedIndex = options[selectedIndex=0].text.length ? -1 : 0;
           showTooltipText(objSel);

           event.keyCode = 0;
           return false;
        }

        case(32):  // space
        {
           top.status = strKeyInBuf += ' ';
           // this must be fired explicitely for spaces
           return !picklistKeyPressHandler(event);
        }

        // I don't know if these are universal
        case(33):  // page up
        case(34):  // page down
        case(35):  // end
        case(36):  // home
        case(37):  // left arrow
        case(38):  // up arrow
        case(39):  // right arrow
        case(40):  // down arrow
        {
           top.status = hideTooltipText(objSel);
           return true;
        }

      }  // end switch
   }  // end with

   return true;
}


function picklistKeyPressHandler(e)
{
   var event = e ? e : window.event;  // to handle both NS and IE events
   var objSel = event.target ? event.target : event.srcElement;
   var inputChar = String.fromCharCode(event.keyCode ? event.keyCode : event.charCode);

   if ( inputChar=='\n' || inputChar=='\r' )
   {
      top.status = objSel.strKeyInBuf = ( objSel.selectedIndex>-1 ? objSel.options[objSel.selectedIndex].text : "" );
   }

   if ( isvalidchar(inputChar) && event.charCode!=0 )
   {
      objSel.strKeyInBuf += inputChar;

      // must use setTimeout to override the default SELECT keypress event(s)
      setTimeout( "findSelectEntry(" + getQualifiedName(objSel) + ")", 1 );
   }

   return true;
}


function setupPicklist(objSel)
{
   if ( !document.all && !document.getElementById )
      return false;  // browser not supported

   if ( !objSel || (""+objSel.type).substring(0,6).toLowerCase()!="select" )
      return false;  // null or not a select

   createTooltipDiv(objSel);

   // create/init data elements
   objSel.X = getX(objSel)+2;
   objSel.Y = getY(objSel)-20;
   objSel.strKeyInBuf = "";

   // setup event handlers
   objSel.onclick     = function(){top.status=hideTooltipText(this);}
   objSel.onfocus     = picklistFocusHandler;
   objSel.onblur      = picklistBlurHandler;
   objSel.onmouseover = picklistMouseOverHandler;
   objSel.onmouseout  = picklistMouseOutHandler;
   objSel.onkeydown   = picklistKeyDownHandler;
   objSel.onkeypress  = picklistKeyPressHandler;
   objSel.onkeyup     = null;

   return true;
}


/////////////////////////////////// -- End Picklist.js -- ////////////////////////////////////////

</SCRIPT>
</HEAD>

<BODY onLoad="setupPicklist(document.myForm.myPicklist1); setTimeout('document.myForm.myPicklist1.focus()',1);"  comment="use setTimeout for Netscape focus" >

<CENTER>
<P align="center">&nbsp;</P>
<P align="center">&nbsp;</P>
<P align="center">&nbsp;</P>

<FORM name="myForm">

 <!-- NOTE: The options in the SELECT must be ordered by the .text property! -->
 <!-- NOTE: The .value properties can be anything you want. -->

 <SELECT name="myPicklist1" size="1"  title="Please type your name in the pick-list below." >
  <OPTION value="whatever"></OPTION>
  <OPTION>Abe</OPTION>
  <OPTION>Alice</OPTION>
  <OPTION>Alicia</OPTION>
  <OPTION>Allen</OPTION>
  <OPTION>Arthur</OPTION>
  <OPTION>Arty</OPTION>
  <OPTION>Beatrice</OPTION>
  <OPTION>Ben</OPTION>
  <OPTION>Bill</OPTION>
  <OPTION>Bing</OPTION>
  <OPTION>Brian</OPTION>
  <OPTION>Brittany</OPTION>
  <OPTION>Bruce</OPTION>
  <OPTION>Buzz</OPTION>
  <OPTION>Carie</OPTION>
  <OPTION>Catherine</OPTION>
  <OPTION>Cathy</OPTION>
  <OPTION>Charles</OPTION>
  <OPTION>Chase</OPTION>
  <OPTION>Chris</OPTION>
  <OPTION>Christian</OPTION>
  <OPTION>Christina</OPTION>
  <OPTION>Christopher</OPTION>
  <OPTION>Clay</OPTION>
  <OPTION>Clayton</OPTION>
  <OPTION>Daniel</OPTION>
  <OPTION>Danny</OPTION>
  <OPTION>Darren</OPTION>
  <OPTION>Darryl</OPTION>
  <OPTION>Darwin</OPTION>
  <OPTION>David</OPTION>
  <OPTION>Dean</OPTION>
  <OPTION>Derrick</OPTION>
  <OPTION>Dinah</OPTION>
  <OPTION>Don</OPTION>
  <OPTION>Doug</OPTION>
  <OPTION>Eathen</OPTION>
  <OPTION>Ed</OPTION>
  <OPTION>Edward</OPTION>
  <OPTION>Edwin</OPTION>
  <OPTION>Evan</OPTION>
  <OPTION>Forrest</OPTION>
  <OPTION>Frank</OPTION>
  <OPTION>Fritz</OPTION>
  <OPTION>Gary</OPTION>
  <OPTION>George</OPTION>
  <OPTION>Glenn</OPTION>
  <OPTION>Greg</OPTION>
  <OPTION>Hank</OPTION>
  <OPTION>Hellen</OPTION>
  <OPTION>Henry</OPTION>
  <OPTION>Imus</OPTION>
  <OPTION>Ingred</OPTION>
  <OPTION>Jack</OPTION>
  <OPTION>Jack Club</OPTION>
  <OPTION>Jack Diamond</OPTION>
  <OPTION>Jack Heart</OPTION>
  <OPTION>Jack Spade</OPTION>
  <OPTION>Jackie</OPTION>
  <OPTION>Jacob</OPTION>
  <OPTION>James</OPTION>
  <OPTION>Jason</OPTION>
  <OPTION>Jean-Luc</OPTION>
  <OPTION>Jerry</OPTION>
  <OPTION>Jesus</OPTION>
  <OPTION>Jim</OPTION>
  <OPTION>John</OPTION>
  <OPTION>Katlyn</OPTION>
  <OPTION>Kayla</OPTION>
  <OPTION>Kendra</OPTION>
  <OPTION>Kyle</OPTION>
  <OPTION>Lance</OPTION>
  <OPTION>Larry</OPTION>
  <OPTION>Leah</OPTION>
  <OPTION>Lenny</OPTION>
  <OPTION>Luke</OPTION>
  <OPTION>Mallory</OPTION>
  <OPTION>Mandy</OPTION>
  <OPTION>Mark</OPTION>
  <OPTION>Mary</OPTION>
  <OPTION>MaryAnn</OPTION>
  <OPTION>Matthew</OPTION>
  <OPTION>Michael</OPTION>
  <OPTION>Michele</OPTION>
  <OPTION>Mickey</OPTION>
  <OPTION>Mike</OPTION>
  <OPTION>Mitch</OPTION>
  <OPTION>Nathan</OPTION>
  <OPTION>Ned</OPTION>
  <OPTION>Olive</OPTION>
  <OPTION>Ollie</OPTION>
  <OPTION>Oppie</OPTION>
  <OPTION>Pat</OPTION>
  <OPTION>Paul</OPTION>
  <OPTION>Perry</OPTION>
  <OPTION>Peter</OPTION>
  <OPTION>Phil</OPTION>
  <OPTION>Phillip</OPTION>
  <OPTION>Rachael</OPTION>
  <OPTION>Ralph</OPTION>
  <OPTION>Randall</OPTION>
  <OPTION>Randy</OPTION>
  <OPTION>Rebekah</OPTION>
  <OPTION>Red</OPTION>
  <OPTION>Rex</OPTION>
  <OPTION>Rick</OPTION>
  <OPTION>Ried</OPTION>
  <OPTION>Robert</OPTION>
  <OPTION>Rodney</OPTION>
  <OPTION>Roger</OPTION>
  <OPTION>Sally</OPTION>
  <OPTION>Sam</OPTION>
  <OPTION>Sharon</OPTION>
  <OPTION>Sidney</OPTION>
  <OPTION>Stephen</OPTION>
  <OPTION>Steve</OPTION>
  <OPTION>Stuart</OPTION>
  <OPTION>Ted</OPTION>
  <OPTION>Terry</OPTION>
  <OPTION>Theodore</OPTION>
  <OPTION>Theresa</OPTION>
  <OPTION>Thomas</OPTION>
  <OPTION>Tim</OPTION>
  <OPTION>Tom</OPTION>
  <OPTION>Val</OPTION>
  <OPTION>Van</OPTION>
  <OPTION>Vince</OPTION>
  <OPTION>Wayne</OPTION>
  <OPTION>Will</OPTION>
  <OPTION>William</OPTION>
  <OPTION>Wink</OPTION>
  <OPTION>Woody</OPTION>
  <OPTION>X</OPTION>
  <OPTION>Yoda</OPTION>
  <OPTION>Zack</OPTION>
  <OPTION>Ziggy</OPTION>
  <OPTION>Zurg</OPTION>
 </SELECT>

<P><INPUT type="submit" value="Reload" /></P>

</FORM>

</CENTER>

</BODY>
</HTML>

<!-------------------------------------------------------------------------------------------------------------------------------------------------------------->

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Asked On
2003-07-16 at 08:13:21ID20680352
Tags

javascript

Topic

JavaScript

Participating Experts
5
Points
20
Comments
15

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Related Solutions

  1. For Tom
    Hi Tom, Thank for your help. Regards, Wang
  2. FOR TOM
    Hi Tom Sorry but i don't have more points available at this time. I will post more points as soon as i get them. Thanks.
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by: knightEknightPosted on 2003-07-16 at 08:39:03ID: 8935434

 

by: jaysolomonPosted on 2003-07-16 at 10:03:34ID: 8936390

kEk

Awsome script

Definately going in my toolbox

Great job

I would proly give you 500 points for this :>)

 

by: AcklenXPosted on 2003-07-16 at 10:46:24ID: 8936629

but it's still not a combo box!!

;)

 

by: knightEknightPosted on 2003-07-16 at 10:52:33ID: 8936660

doesn't claim to be :)  However, that is a doable thing -- at least in IE.  I'll have to investigate it for NS.

 

by: jaysolomonPosted on 2003-07-16 at 12:17:57ID: 8937216

i investigated NS7.02 works like a charm

thanks for the point kEk

jAy

 

by: mplungjanPosted on 2003-07-17 at 23:28:47ID: 8949532

I'll just post this for people who needs a smaller script
<HTML>
<HEAD>
<TITLE>Combo Box</TITLE>
<SCRIPT LANGUAGE="JavaScript"><!-- // cloak
/* (c) 1999-2003 Michel Plungjan  "michel at irt.org"
   comments, bugs or improvements welcome */

function checkIt(theValue,theSelect) {
   var theIndex = theSelect.selectedIndex;
   if (theIndex ==-1) theIndex = 0;
   for (var i=0,n=theSelect.options.length;i<n;i++) {
//    if (theSelect.options[i].texttoLowerCase().indexOf(theValue.toLowerCase()) == 0) { // case INsensitive
      if (theSelect.options[i].text.indexOf(theValue) == 0) { // case sensitive
         theSelect.selectedIndex=i;
         break;
      }
   }
}

// uncloak --></SCRIPT>
</HEAD>
<BODY onLoad="document.myform.inputField.focus()">
Start typing (case sensitive)
<FORM NAME="myform" onSubmit="return false">
<INPUT NAME="inputField" TYPE="TEXT" SIZE=10 onKeyUp="checkIt(this.value,this.form.List)">
<BR><SELECT NAME="List" SIZE="10" onChange="this.form.inputField.value=this.options[this.selectedIndex].text">
<OPTION>A
<OPTION>Apple
<OPTION>Applicable
<OPTION>Application
<OPTION>B
<OPTION>Banana
</SELECT>
</FORM>
</BODY>
</HTML>

 

by: knightEknightPosted on 2003-08-05 at 10:48:29ID: 9082324

/*
 more bonus material ...
 The .js file below will sort the options in a SELECT, simply do this:  qsortSelect(objSelect);
 You can use this to sort a SELECT before you initialize it as a PickList.
*/



 var UNDEFINED;  // do not assign!

 function copyOpt( srcOpt, destOpt )
 {
    if (!srcOpt)  return null;
    if (!destOpt) return new Option(srcOpt.text,srcOpt.value,srcOpt.defaultSelected,srcOpt.selected);
    destOpt.value = srcOpt.value;
    destOpt.text  = srcOpt.text;
    destOpt.selected = srcOpt.selected;
    destOpt.defaultSelected = srcOpt.defaultSelected;
    return destOpt;
 }


 function swapOpt( opt1, opt2 )
 {
    if ( opt1 == opt2 ) return false;

    var tmp = copyOpt( opt1 );
    copyOpt( opt2, opt1 );
    copyOpt( tmp, opt2 );

    return true;
 }


 function qsortSelect( objSelect, head, tail )
 {
    if (head==UNDEFINED) head = 0;
    if (tail==UNDEFINED) tail = objSelect.options.length;
   
    if ( head+1 < tail ) with ( objSelect )
    {
       var prevlow = head;

       for ( var i=head+1; i<tail; ++i )
       {
          if ( options[i].text.toUpperCase() < options[head].text.toUpperCase() )
          {
             swapOpt( options[i], options[++prevlow] );
          }
       }

       swapOpt( options[head], options[prevlow] );

       qsortSelect( objSelect, head, prevlow );
       qsortSelect( objSelect, prevlow+1, tail );
    }
 }

 

by: knightEknightPosted on 2003-08-12 at 09:29:25ID: 9131425

 

by: PhrogzPosted on 2003-08-29 at 13:46:30ID: 9251246

 

by: mplungjanPosted on 2003-09-09 at 03:00:38ID: 9318754

 

by: xangelusxPosted on 2003-09-24 at 10:03:21ID: 9422344

I just started working on a true HTML combo box.  It's pretty limited in it's current implimentation, but I've already started expanding on it.  Try it out and let me know if you notice any bugs.  I've tested it on Firebird 0.6 and IE 6.0 for the PC

http://www.csb7.com/samples/HTMLComboBox.htm

 

by: jaysolomonPosted on 2003-09-24 at 10:09:26ID: 9422393

x

In my IE6 all i get is a textbox, don't see anything whatsoever pop up

 

by: xangelusxPosted on 2003-09-24 at 10:15:41ID: 9422445

Jay,  I just sent you an email regarding your comment.

 

by: mplungjanPosted on 2003-09-24 at 15:36:49ID: 9424609

Nice in Mozilla

 

by: xangelusxPosted on 2003-09-24 at 16:12:36ID: 9424767

Thanks, MP.  I hadn't gotten around to testing it in Moz yet.  It appears safe in IE 5.5 - 6.0, NS 6 - 7 and the current version of Firebird, though Jay still can't seem to get it to work on his copy of IE.  It also degrades nicely in NS 4.7x.

20120131-EE-VQP-002

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