source: main/trunk/model-cols-dev/peijones/script/collage.js@ 27065

// elementFade based on javascript from fotonotes.net

function elementFade(elm, show, doneCallback)
{
 // Fader function that shows/hides an element.
 var speed = show ? 4 : 2;
 elm._f_count |= 0;
 elm._f_timer |= null;
 clearTimeout(elm._f_timer);

 if (show && !elm._f_count) elm.style.visibility = 'inherit';

 elm._f_count = Math.max(0, Math.min(100, elm._f_count + speed*(show?1:-1)));

 var f = elm.filters, done = (elm._f_count==100);
 if (f)
 {
  if (!done && elm.style.filter.indexOf("alpha") == -1) {
     elm.style.filter += ' alpha(opacity=' + elm._f_count + ')';
  }
  else if (f.length && f.alpha) with (f.alpha) {
     if (done) { enabled = false; }
     else { opacity = elm._f_count; enabled=true }
  }
 }
 else {
     elm.style.opacity = elm.style.MozOpacity = elm._f_count/100.1;
 }

 if (!show && !elm._f_count) {
     elm.style.visibility = 'hidden';
  }

 if (elm._f_count % 100) {
    // set fresh timeout if count != 100
    elm._f_timer = setTimeout(function() { elementFade(elm,show,doneCallback) }, 50);
  }
  else {
     if (doneCallback) { doneCallback(); }
  }
}


function setAlphaVal(elm,val)
{
 var f = elm.filters;

 if (f)
 {
  if (elm.style.filter.indexOf("alpha") == -1) {
     elm.style.filter += ' alpha(opacity=' + val + ')';
  }
  else if (f.length && f.alpha) with (f.alpha) {
     opacity = val;
  }
 }
 else {
     elm.style.opacity = elm.style.MozOpacity = val/100.1;
 }
}




function collageSwap()
{
    var collagecanvas = document.getElementById('collagecanvas');
    var fadingincanvas = document.getElementById('fadingincanvas');

    fadingincanvas._f_count = 0;
    fadingincanvas.style.visibility = 'hidden';

    var collageimg = document.getElementById('collageimg');
    var fadingimg = document.getElementById('fadingimg');

    collageimg.src = fadingimg.src;

    var keyframeNum = fadingimg.keyframeNum;
    var totalNumKeyframes = fadingimg.totalNumKeyframes;

    nextKeyframeNum = (keyframeNum % totalNumKeyframes) +1;

    var collageTimer = setTimeout('fadeNextImage('+nextKeyframeNum+')',2000);
    fadingimg.collageTimer = collageTimer;


}


function getElementsByClass(searchClass,node,tag) {
    var classElements = new Array();
    if ( node == null )
        node = document;
    if ( tag == null )
        tag = '*';
    var els = node.getElementsByTagName(tag);
    var elsLen = els.length;
    var pattern = new RegExp('(^|\\\\s)'+searchClass+'(\\\\s|$)');
    for (i = 0, j = 0; i < elsLen; i++) {
        if ( pattern.test(els[i].className) ) {
            classElements[j] = els[i];
            j++;
        }
    }
    return classElements;
}


/**
 * sprintf() for JavaScript v.0.4
 *
 * Copyright (c) 2007 Alexandru Marasteanu <http://alexei.417.ro/>
 * Thanks to David Baird (unit test and patch).
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA
 */

function str_repeat(i, m) { for (var o = []; m > 0; o[--m] = i); return(o.join('')); }

function sprintf () {
  var i = 0, a, f = arguments[i++], o = [], m, p, c, x;
  while (f) {
    if (m = /^[^\x25]+/.exec(f)) o.push(m[0]);
    else if (m = /^\x25{2}/.exec(f)) o.push('%');
    else if (m = /^\x25(?:(\d+)\$)?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-fosuxX])/.exec(f)) {
      if (((a = arguments[m[1] || i++]) == null) || (a == undefined)) throw("Too few arguments.");
      if (/[^s]/.test(m[7]) && (typeof(a) != 'number'))
        throw("Expecting number but found " + typeof(a));
      switch (m[7]) {
        case 'b': a = a.toString(2); break;
        case 'c': a = String.fromCharCode(a); break;
        case 'd': a = parseInt(a); break;
        case 'e': a = m[6] ? a.toExponential(m[6]) : a.toExponential(); break;
        case 'f': a = m[6] ? parseFloat(a).toFixed(m[6]) : parseFloat(a); break;
        case 'o': a = a.toString(8); break;
        case 's': a = ((a = String(a)) && m[6] ? a.substring(0, m[6]) : a); break;
        case 'u': a = Math.abs(a); break;
        case 'x': a = a.toString(16); break;
        case 'X': a = a.toString(16).toUpperCase(); break;
      }
      a = (/[def]/.test(m[7]) && m[2] && a > 0 ? '+' + a : a);
      c = m[3] ? m[3] == '0' ? '0' : m[3].charAt(1) : ' ';
      x = m[5] - String(a).length;
      p = m[5] ? str_repeat(c, x) : '';
      o.push(m[4] ? a + p : p + a);
    }
    else throw ("Huh ?!");
    f = f.substring(m[0].length);
  }
  return o.join('');
}