includes/clientside/static/fadefilter.js
author Dan
Fri, 18 Dec 2009 19:06:49 -0500
changeset 1175 1e2c9819ede3
parent 1056 f21d6e75b469
child 1227 bdac73ed481e
permissions -rw-r--r--
Logs: Fully integrated an author_uid column. Logs are now linked by user ID instead of just username, so they survive username changes better. Database is changed. Fixes issue 6.
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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 = [];
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var FADE_TIME = 500; // in ms
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function darken(nofade, opacVal, layerid)
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{
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  layerid = ( layerid ) ? layerid : 'specialLayer_darkener';
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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[layerid] = ( typeof(darkener_index[layerid]) == 'number' ) ? darkener_index[layerid] + 1 : 1;
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  if(document.getElementById(layerid) && !document.getElementById(layerid).destroying)
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  {
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    document.getElementById(layerid).style.zIndex = getHighestZ() + 1;
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    if(nofade)
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    {
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      changeOpac(opacVal, layerid);
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      document.getElementById(layerid).style.display = 'block';
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      document.getElementById(layerid).myOpacVal = opacVal;
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    }
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    else
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    {
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      if ( document.getElementById(layerid).style.display != 'none' )
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      {
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        var currentOpac = document.getElementById(layerid).myOpacVal;
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        opacity(layerid, currentOpac, opacVal, FADE_TIME);
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        document.getElementById(layerid).myOpacVal = opacVal;
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      }
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      else
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      {
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        document.getElementById(layerid).style.display = 'block';
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        document.getElementById(layerid).myOpacVal = opacVal;
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        opacity(layerid, 0, opacVal, FADE_TIME);
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      }
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    }
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  }
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  else if(document.getElementById(layerid) && document.getElementById(layerid).destroying)
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  {
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    // fade in progress - abort
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    console.warn('Aborting fade');
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    abortFades();
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    changeOpac(opacVal, layerid);
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    document.getElementById(layerid).destroying = false;
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    return document.getElementById(layerid);
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  }
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  else
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  {
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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 = IE ? h + 'px' : '100%';
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    thediv.style.zIndex = getHighestZ() + 1;
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    thediv.id = layerid;
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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(layerid, 0, opacVal, FADE_TIME);
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    }
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  }
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  return document.getElementById(layerid);
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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, layerid)
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{
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  layerid = ( layerid ) ? layerid : 'specialLayer_darkener';
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  if(IE)
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    nofade = true;
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  darkener_index[layerid] -= 1;
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  if ( darkener_index[layerid] > 0 )
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    return false;
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  if(document.getElementById(layerid))
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  {
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    if(nofade)
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    {
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      document.getElementById(layerid).style.display = 'none';
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    }
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    else
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    {
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      document.getElementById(layerid).destroying = true;
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      var from = document.getElementById(layerid).myOpacVal;
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      opacity(layerid, from, 0, FADE_TIME);
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      setTimeout("var l = document.getElementById('" + layerid + "'); var b = document.getElementsByTagName('body')[0]; b.removeChild(l);", 1000);
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    }
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  }
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  return document.getElementById(layerid);
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}