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Change table column size

Posted on 2004-10-13
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Last Modified: 2012-05-05
I have a table where the user may want to hide some columns in order to provide more room. I'd like to devise a script that would let them click a given cell (in top row) and have that column collapse to a width of say, 5 px. A 2nd click to that cell would toggle the column back to the original width.

It would probably be necessary to make the text as tiny as possible and change font color to the same as the background color so the cell looks blank.

Any examples of something like this anywhere?

thankx
--steve...
0
Comment
Question by:juststeve
9 Comments
 
LVL 3

Expert Comment

by:Tyzer
ID: 12297540
Hi steve,

here is my idea ..
set up a table with rows and columns which have id's and classes, like this

<tr><td id=col1row1 class=headTD_open>text</td><td id=col2row1 class=headTD_open>text</td><td id=col3row1 class=headTD_open>text</td></tr>

define 2 classes , a 'open' and 'closed' version for your table cells..
start with giving the cells the blabla_open class

for the 'closed' class , set the following, background:#FFFFFF; color:#FFFFFF; overflow:hidden; width:5px;

then add onclick events to the cells in the first row, like this <td id=col1row1 class=headTD_open onclick="javascript:switchcolumnstyle(1)">

and last but not least , create a function which takes the column parameter, and loops through the whole table , and sets the className for every row that it finds with the given column index..
something like this:

function switchcolumnstyle(iCol){
   var aTds = document.getElementsByTagName('TD')
   for (i=0;i<aTDs.length;i++){
   
   }
}



0
 
LVL 3

Expert Comment

by:Tyzer
ID: 12297583
hm.. wasn't really finished.. and suddenly i pressed Enter on my keyboard..

.. i was saying ..

something like this:

function switchcolumnstyle(iCol){
   var aTds = document.getElementsByTagName('TD')
   for (i=0;i<aTDs.length;i++){
       if (aTDs[i].id.indexOf('col'+iCol)!=-1){
           if (aTDs[i].className=='headTD_open'){aTDs[i].className='headTD_open'}
           else{aTDs[i].className='headTD_closed'}
       }
   }
}

Goodluck with it ! Tys
0
 

Accepted Solution

by:
nightdrive earned 150 total points
ID: 12298221
Sorry, I can't supply code, as I've never tried it, but I believe you can use the <COL> html element. This is used to provide shortcut to assigning widths and other characteristics (styles) to one or more subsets of columns within a table or within a table's column group (also element <COLGROUP>)
(from O'Reilly's Dynamic HTML)

<table>
   <col id="column1" class="col1class">
   <col id="column2" class="col2class">
   <col id="column3" class="col3class">
   <tr>
       <td></td>
       <td></td>
       <td></td>
   </tr>
etc for multiple rows

This would allow you to access a whole column by id, or change it's class. No js looping!
Try it out on a really simple test table, and see how it goes. As I said, I haven't tried it (yet), but read about for a similar problem in our webdev department.



0
 
LVL 11

Assisted Solution

by:raj3060
raj3060 earned 50 total points
ID: 12298273
Try this:
+++++++++++++++++++++++
<script>
function render(c, t) {
 if (c.checked) {
  document.getElementById(t).style.display="block"
 } else {
  document.getElementById(t).style.display="none"
 }
}
</script>

<form>
<input type="checkbox" onclick="render(this, 'hiddenTable')">
<table id="hiddenTable" style="display:none">
<tr>
<td><input type="text"></td>
<td><input type="text"></td>
</tr>
</table>
</form>
+++++++++++++++++++++++++++++
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LVL 11

Expert Comment

by:raj3060
ID: 12298284
Remember you can replace checkbox to a button or a link.
-Raj
0
 
LVL 8

Assisted Solution

by:RozanaZ
RozanaZ earned 100 total points
ID: 12298334
<HTML>
<HEAD>
<TITLE></TITLE>

<script>
var narrowWidth="2";
var normalWidth="100";
      function test(ind)
      {
            var tableObj = document.getElementById("myTable");      
            var objRows         = tableObj.rows;
            for (i = 0; i < objRows.length; i++)
            {
                  if (objRows[i].cells[ind].width == narrowWidth)
                  {
                        objRows[i].cells[ind].width=normalWidth;
                  }
                  else if (objRows[i].cells[ind].width == normalWidth)
                  {
                        objRows[i].cells[ind].width=narrowWidth;
                  }
            }
      }      
</script>

<style>
</style>

</HEAD>

<BODY>

<table id="myTable" border="1">
      <tr bgcolor="pink">
            <td width="100px" onClick="test(0)">Cell 1</td>
            <td width="100px" onClick="test(1)">Cell 2</td>            
            <td width="100px" onClick="test(2)">Cell 3</td>
      </tr>
      <tr>
            <td>Cell 11 </td>
            <td>Cell 12 </td>            
            <td>Cell 13 </td>
      </tr>
      <tr>
            <td>Cell 21 </td>
            <td>Cell 22 </td>            
            <td>Cell 23 </td>
      </tr>
      <tr>
            <td>Cell 31 </td>
            <td>Cell 32 </td>            
            <td>Cell 33 </td>
      </tr>
</table>

</BODY>
</HTML>
0
 
LVL 3

Assisted Solution

by:hemebond
hemebond earned 100 total points
ID: 12316532
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
      <head>
            <title></title>
            <script type="text/javascript">
                  var txt = window.navigator.appName;
                  var ie = (txt == "Microsoft Internet Explorer") ? true : false;
                  var opera = (txt == "Opera") ? true : false;
            </script>
      </head>
      <body>
            <table border="1">
                  <thead>
                        <tr>
                              <th>Column 1</th>
                              <th>Column 2</th>
                              <th>Column 3</th>
                        </tr>
                  </thead>
                  <tbody>
                        <tr>
                              <td>text</td>
                              <td>text</td>
                              <td>text</td>
                        </tr>
                  </tbody>
            </table>
      </body>
      <script type="text/javascript">
            var th = document.getElementsByTagName('th');
            for(var a = 0; a < th.length; a++)
            {
                  if(ie || opera)
                  {
                        th[a].onclick = toggle;
                  }
                  else
                  {
                        th[a].addEventListener('click',toggle,true);
                  }
            }

            var rows = document.getElementsByTagName('tr');
            function toggle(e)
            {
                  var i = (ie) ? this.cellIndex : e.currentTarget.cellIndex;
                  for(a = 0; a < rows.length; a++)
                  {
                        rows[a].cells[i].style.fontSize = (rows[a].cells[i].style.fontSize == '1px') ? '' : '1px';
                  }
            }
      </script>
</html>
0
 
LVL 3

Assisted Solution

by:Tyzer
Tyzer earned 100 total points
ID: 12327351
I've tried Nightdrive's idea, and it works fine !

<html>
<head>

<style>
      .col1class{
            width:200px;
            background:#FF0000;
      }

      .col2class{
            width:50px;
            background:#0000FF;
      }
</style>

<script>

      function fnSwitch(i){
            var oCol = document.getElementById('column'+i)
            if(oCol.className == 'col1class'){
                  oCol.className = 'col2class';
            }
            else{
                  oCol.className = 'col1class';
            }
      }

</script>

</head>

<body>

<table border=1>
   <col id="column1" class="col1class">
   <col id="column2" class="col1class">
   <col id="column3" class="col1class">
   <thead>
      <tr>
                   <th onclick="javascript:fnSwitch(1);">Header 1</th>
              <th onclick="javascript:fnSwitch(2);">Header 2</th>
              <th onclick="javascript:fnSwitch(3);">Header 3</th>
      </tr>
   </thead>
   <tbody>
         <tr>
              <td>cell 1.1</td>
              <td>cell 1.2</td>
              <td>cell 1.3</td>
      </tr>
      <tr>
              <td>cell 2.1</td>
              <td>cell 2.2</td>
              <td>cell 2.3</td>
        </tr>
      <tr>
              <td>cell 3.1</td>
              <td>cell 3.2</td>
              <td>cell 3.3</td>
      </tr>
   </tbody>
</table>

</body>

</html>
0
 

Author Comment

by:juststeve
ID: 12574540
Thankx to all!
0

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