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ICQ форум. » Веб мастеру » Программирование и скрипты » Ефект отражения изображения
Ефект отражения изображения
MaqueenДата: Суббота, 24.01.2009, 00:32 | Сообщение # 1
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Code
<script type="text/javascript">       
document.getElementsByClassName = function(className) {       
              var children = document.getElementsByTagName('*') || document.all;       
              var elements = new Array();       
                           
              for (var i = 0; i < children.length; i++) {       
               var child = children[i];       
               var classNames = child.className.split(' ');       
               for (var j = 0; j < classNames.length; j++) {       
                if (classNames[j] == className) {       
                 elements.push(child);       
                 break;       
                }       
               }       
              }       
              return elements;       
}       

var Reflection = {       
              defaultHeight : 0.5,       
              defaultOpacity: 0.5,       
                           
              add: function(image, options) {       
               Reflection.remove(image);       
                           
               doptions = { "height" : Reflection.defaultHeight, "opacity" : Reflection.defaultOpacity }       
               if (options) {       
                for (var i in doptions) {       
                 if (!options[i]) {       
                  options[i] = doptions[i];       
                 }       
                }       
               } else {       
                options = doptions;       
               }       
                           
               try {       
                var d = document.createElement('div');       
                var p = image;       
                             
                var classes = p.className.split(' ');       
                var newClasses = '';       
                for (j=0;j<classes.length;j++) {       
                 if (classes[j] != "userAvatar") {       
                  if (newClasses) {       
                   newClasses += ' '       
                  }       
                    
                  newClasses += classes[j];       
                 }       
                }       

                var reflectionHeight = Math.floor(p.height*options['height']);       
                var divHeight = Math.floor(p.height*(1+options['height']));       
                             
                var reflectionWidth = p.width;       
                             
                if (document.all && !window.opera) {       
                 /* Copy original image's classes & styles to div */       
                 d.className = newClasses;       
                 p.className = 'reflected';       
                             
                 d.style.cssText = p.style.cssText;       
                 p.style.cssText = 'vertical-align: bottom';       
                             
                 var reflection = document.createElement('img');       
                 reflection.src = p.src;       
                 reflection.style.width = reflectionWidth+'px';       
                             
                 reflection.style.marginBottom = "-"+(p.height-reflectionHeight)+'px';       
                 reflection.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity='+(options['opacity']*100)+', style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+(options['height']*100)+')';       
                             
                 d.style.width = reflectionWidth+'px';       
                 d.style.height = divHeight+'px';       
                 p.parentNode.replaceChild(d, p);       
                             
                 d.appendChild(p);       
                 d.appendChild(reflection);       
                } else {       
                 var canvas = document.createElement('canvas');       
                 if (canvas.getContext) {       
                  /* Copy original image's classes & styles to div */       
                  d.className = newClasses;       
                  p.className = 'reflected';       
                    
                  d.style.cssText = p.style.cssText;       
                  p.style.cssText = 'vertical-align: bottom';       
                             
                  var context = canvas.getContext("2d");       
                             
                  canvas.style.height = reflectionHeight+'px';       
                  canvas.style.width = reflectionWidth+'px';       
                  canvas.height = reflectionHeight;       
                  canvas.width = reflectionWidth;       
                    
                  d.style.width = reflectionWidth+'px';       
                  d.style.height = divHeight+'px';       
                  p.parentNode.replaceChild(d, p);       
                    
                  d.appendChild(p);       
                  d.appendChild(canvas);       
                    
                  context.save();       
                    
                  context.translate(0,image.height-1);       
                  context.scale(1,-1);       
                    
                  context.drawImage(image, 0, 0, reflectionWidth, image.height);       
                           
                  context.restore();       
                    
                  context.globalCompositeOperation = "destination-out";       
                  var gradient = context.createLinearGradient(0, 0, 0, reflectionHeight);       
                    
                  gradient.addColorStop(1, "rgba(255, 255, 255, 1.0)");       
                  gradient.addColorStop(0, "rgba(255, 255, 255, "+(1-options['opacity'])+")");       
                           
                  context.fillStyle = gradient;       
                  if (navigator.appVersion.indexOf('WebKit') != -1) {       
                   context.fill();       
                  } else {       
                   context.fillRect(0, 0, reflectionWidth, reflectionHeight*2);       
                  }       
                 }       
                }       
               } catch (e) {       
                  }       
              },       
                           
              remove : function(image) {       
               if (image.className == "reflected") {       
                image.className = image.parentNode.className;       
                image.parentNode.parentNode.replaceChild(image, image.parentNode);       
               }       
              }       
}       

function addReflections() {       
              var rimages = document.getElementsByClassName('userAvatar');       
              for (i=0;i<rimages.length;i++) {       
               var rheight = null;       
               var ropacity = null;       
                           
               var classes = rimages[i].className.split(' ');       
               for (j=0;j<classes.length;j++) {       
                if (classes[j].indexOf("rheight") == 0) {       
                 var rheight = classes[j].substring(7)/100;       
                } else if (classes[j].indexOf("ropacity") == 0) {       
                 var ropacity = classes[j].substring(8)/100;       
                }       
               }       
                           
               Reflection.add(rimages[i], { height: rheight, opacity : ropacity});       
              }       
}       

var previousOnload = window.onload;       
window.onload = function () { if(previousOnload) previousOnload(); addReflections(); }       
</script>
 
ICQ форум. » Веб мастеру » Программирование и скрипты » Ефект отражения изображения
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