includes/clientside/static/fadefilter.js
author Dan
Thu, 03 Jul 2008 15:37:18 -0400
changeset 596 82320949a3b5
parent 582 a38876c0793c
child 677 2a263b598a2b
permissions -rw-r--r--
Added failsafe .htaccess files to enable far future Expires and mod_deflate
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/**
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 * Darkens the browser screen. This will make the entire page un-clickable except for any floating divs created after this is called. Restore with enlighten().
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 * @param bool Controls whether the fade should be disabled or not. aclDisableTransitionFX will override this if set to true, and fades are never fired on IE.
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 * @param int When specified, represents the numeric opacity value to set the fade layer to. 1-100.
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 */
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var darkener_index = 0;
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function darken(nofade, opacVal)
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{
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  if(IE)
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    nofade = true;
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  if ( !opacVal )
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    opacVal = 70;
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  darkener_index++;
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  if(document.getElementById('specialLayer_darkener'))
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  {
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    if(nofade)
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    {
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      changeOpac(opacVal, 'specialLayer_darkener');
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      document.getElementById('specialLayer_darkener').style.display = 'block';
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      document.getElementById('specialLayer_darkener').myOpacVal = opacVal;
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    }
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    else
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    {
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      if ( document.getElementById('specialLayer_darkener').style.display != 'none' )
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      {
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        var currentOpac = document.getElementById('specialLayer_darkener').myOpacVal;
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        opacity('specialLayer_darkener', currentOpac, opacVal, 1000);
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        document.getElementById('specialLayer_darkener').myOpacVal = opacVal;
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      }
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      else
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      {
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        document.getElementById('specialLayer_darkener').style.display = 'block';
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        document.getElementById('specialLayer_darkener').myOpacVal = opacVal;
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        opacity('specialLayer_darkener', 0, opacVal, 1000);
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      }
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    }
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  } else {
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    w = getWidth();
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    h = getHeight();
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    var thediv = document.createElement('div');
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    if(IE)
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      thediv.style.position = 'absolute';
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    else
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      thediv.style.position = 'fixed';
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    if ( IE )
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    {
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      var top = getScrollOffset();
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      thediv.style.top = String(top) + 'px';
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    }
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    else
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    {
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      thediv.style.top = '0px';
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    }
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    thediv.style.left = '0px';
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    thediv.style.opacity = '0';
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    thediv.style.filter = 'alpha(opacity=0)';
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    thediv.style.backgroundColor = '#000000';
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    thediv.style.width =  '100%';
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    thediv.style.height = '100%';
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    thediv.zIndex = getHighestZ() + 5;
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    thediv.id = 'specialLayer_darkener';
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    thediv.myOpacVal = opacVal;
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    if(nofade)
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    {
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      thediv.style.opacity = ( parseFloat(opacVal) / 100 );
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      thediv.style.filter = 'alpha(opacity=' + opacVal + ')';
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      body = document.getElementsByTagName('body');
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      body = body[0];
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      body.appendChild(thediv);
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    } else {
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      body = document.getElementsByTagName('body');
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      body = body[0];
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      body.appendChild(thediv);
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      opacity('specialLayer_darkener', 0, opacVal, 1000);
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    }
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  }
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}
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/**
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 * Un-darkens the screen and re-enables clicking of on-screen controls.
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 * @param bool If true, disables the fade effect. Fades are always disabled if aclDisableTransitionFX is true and on IE.
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 */
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function enlighten(nofade)
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{
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  if(IE)
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    nofade = true;
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  darkener_index -= 1;
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  if ( darkener_index > 0 )
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    return false;
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  if(document.getElementById('specialLayer_darkener'))
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  {
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    if(nofade)
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    {
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      document.getElementById('specialLayer_darkener').style.display = 'none';
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    }
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    else
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    {
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      var from = document.getElementById('specialLayer_darkener').myOpacVal;
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      // console.info('Fading from ' + from);
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      opacity('specialLayer_darkener', from, 0, 1000);
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      setTimeout("document.getElementById('specialLayer_darkener').style.display = 'none';", 1000);
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    }
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  }
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}