// SprySlidingPanels.js - version 0.5 - Spry Pre-Release 1.6
//
// Copyright (c) 2006. Adobe Systems Incorporated.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of Adobe Systems Incorporated nor the names of its
//     contributors may be used to endorse or promote products derived from this
//     software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
var Spry;if(!Spry){Spry={};}if(!Spry.Widget){Spry.Widget={};}Spry.Widget.SlidingPanels=function(element,opts){this.element=this.getElement(element);this.enableAnimation=true;this.currentPanel=null;this.enableKeyboardNavigation=true;this.hasFocus=false;this.previousPanelKeyCode=Spry.Widget.SlidingPanels.KEY_LEFT;this.nextPanelKeyCode=Spry.Widget.SlidingPanels.KEY_RIGHT;this.currentPanelClass="SlidingPanelsCurrentPanel";this.focusedClass="SlidingPanelsFocused";this.animatingClass="SlidingPanelsAnimating";Spry.Widget.SlidingPanels.setOptions(this,opts);if(this.element){this.element.style.overflow="hidden";}if(this.defaultPanel){if(typeof this.defaultPanel=="number"){this.currentPanel=this.getContentPanels()[this.defaultPanel];}else{this.currentPanel=this.getElement(this.defaultPanel);}}if(!this.currentPanel){this.currentPanel=this.getContentPanels()[0];}if(Spry.Widget.SlidingPanels.onloadDidFire){this.attachBehaviors();}else{Spry.Widget.SlidingPanels.loadQueue.push(this);}};Spry.Widget.SlidingPanels.prototype.onFocus=function(e){this.hasFocus=true;this.addClassName(this.element,this.focusedClass);return false;};Spry.Widget.SlidingPanels.prototype.onBlur=function(e){this.hasFocus=false;this.removeClassName(this.element,this.focusedClass);return false;};Spry.Widget.SlidingPanels.KEY_LEFT=37;Spry.Widget.SlidingPanels.KEY_UP=38;Spry.Widget.SlidingPanels.KEY_RIGHT=39;Spry.Widget.SlidingPanels.KEY_DOWN=40;Spry.Widget.SlidingPanels.prototype.onKeyDown=function(e){var key=e.keyCode;if(!this.hasFocus||(key!=this.previousPanelKeyCode&&key!=this.nextPanelKeyCode)){return true;}if(key==this.nextPanelKeyCode){this.showNextPanel();}else{this.showPreviousPanel();}if(e.preventDefault){e.preventDefault();}else{e.returnValue=false;}if(e.stopPropagation){e.stopPropagation();}else{e.cancelBubble=true;}return false;};Spry.Widget.SlidingPanels.prototype.attachBehaviors=function(){var ele=this.element;if(!ele){return;}if(this.enableKeyboardNavigation){var focusEle=null;var tabIndexAttr=ele.attributes.getNamedItem("tabindex");if(tabIndexAttr||ele.nodeName.toLowerCase()=="a"){focusEle=ele;}if(focusEle){var self=this;Spry.Widget.SlidingPanels.addEventListener(focusEle,"focus",function(e){return self.onFocus(e||window.event);},false);Spry.Widget.SlidingPanels.addEventListener(focusEle,"blur",function(e){return self.onBlur(e||window.event);},false);Spry.Widget.SlidingPanels.addEventListener(focusEle,"keydown",function(e){return self.onKeyDown(e||window.event);},false);}}if(this.currentPanel){var ea=this.enableAnimation;this.enableAnimation=false;this.showPanel(this.currentPanel);this.enableAnimation=ea;}};Spry.Widget.SlidingPanels.prototype.getElement=function(ele){if(ele&&typeof ele=="string"){return document.getElementById(ele);}return ele;};Spry.Widget.SlidingPanels.prototype.addClassName=function(ele,className){if(!ele||!className||(ele.className&&ele.className.search(new RegExp("\\b"+className+"\\b"))!=-1)){return;}ele.className+=(ele.className?" ":"")+className;};Spry.Widget.SlidingPanels.prototype.removeClassName=function(ele,className){if(!ele||!className||(ele.className&&ele.className.search(new RegExp("\\b"+className+"\\b"))==-1)){return;}ele.className=ele.className.replace(new RegExp("\\s*\\b"+className+"\\b","g"),"");};Spry.Widget.SlidingPanels.setOptions=function(obj,optionsObj,ignoreUndefinedProps){if(!optionsObj){return;}for(var optionName in optionsObj){if(ignoreUndefinedProps&&optionsObj[optionName]==undefined){continue;}obj[optionName]=optionsObj[optionName];}};Spry.Widget.SlidingPanels.prototype.getElementChildren=function(element){var children=[];var child=element.firstChild;while(child){if(child.nodeType==1){children.push(child);}child=child.nextSibling;}return children;};Spry.Widget.SlidingPanels.prototype.getCurrentPanel=function(){return this.currentPanel;};Spry.Widget.SlidingPanels.prototype.getContentGroup=function(){return this.getElementChildren(this.element)[0];};Spry.Widget.SlidingPanels.prototype.getContentPanels=function(){return this.getElementChildren(this.getContentGroup());};Spry.Widget.SlidingPanels.prototype.getContentPanelsCount=function(){return this.getContentPanels().length;};Spry.Widget.SlidingPanels.onloadDidFire=false;Spry.Widget.SlidingPanels.loadQueue=[];Spry.Widget.SlidingPanels.addLoadListener=function(handler){if(typeof window.addEventListener!="undefined"){window.addEventListener("load",handler,false);}else{if(typeof document.addEventListener!="undefined"){document.addEventListener("load",handler,false);}else{if(typeof window.attachEvent!="undefined"){window.attachEvent("onload",handler);}}}};Spry.Widget.SlidingPanels.processLoadQueue=function(handler){Spry.Widget.SlidingPanels.onloadDidFire=true;var q=Spry.Widget.SlidingPanels.loadQueue;var qlen=q.length;for(var i=0;i<qlen;i++){q[i].attachBehaviors();}};Spry.Widget.SlidingPanels.addLoadListener(Spry.Widget.SlidingPanels.processLoadQueue);Spry.Widget.SlidingPanels.addEventListener=function(element,eventType,handler,capture){try{if(element.addEventListener){element.addEventListener(eventType,handler,capture);}else{if(element.attachEvent){element.attachEvent("on"+eventType,handler);}}}catch(e){}};Spry.Widget.SlidingPanels.prototype.getContentPanelIndex=function(ele){if(ele){ele=this.getElement(ele);var panels=this.getContentPanels();var numPanels=panels.length;for(var i=0;i<numPanels;i++){if(panels[i]==ele){return i;}}}return -1;};Spry.Widget.SlidingPanels.prototype.showPanel=function(elementOrIndex){var pIndex=-1;if(typeof elementOrIndex=="number"){pIndex=elementOrIndex;}else{pIndex=this.getContentPanelIndex(elementOrIndex);}var numPanels=this.getContentPanelsCount();if(numPanels>0){pIndex=(pIndex>=numPanels)?numPanels-1:pIndex;}else{pIndex=0;}var panel=this.getContentPanels()[pIndex];var contentGroup=this.getContentGroup();if(panel&&contentGroup){if(this.currentPanel){this.removeClassName(this.currentPanel,this.currentPanelClass);}this.currentPanel=panel;var nx=-panel.offsetLeft;var ny=-panel.offsetTop;if(this.enableAnimation){if(this.animator){this.animator.stop();}var cx=contentGroup.offsetLeft;var cy=contentGroup.offsetTop;if(cx!=nx||cy!=ny){var self=this;this.addClassName(this.element,this.animatingClass);this.animator=new Spry.Widget.SlidingPanels.PanelAnimator(contentGroup,cx,cy,nx,ny,{duration:this.duration,fps:this.fps,transition:this.transition,finish:function(){self.removeClassName(self.element,self.animatingClass);self.addClassName(panel,self.currentPanelClass);}});this.animator.start();}}else{contentGroup.style.left=nx+"px";contentGroup.style.top=ny+"px";this.addClassName(panel,this.currentPanelClass);}}return panel;};Spry.Widget.SlidingPanels.prototype.showFirstPanel=function(){return this.showPanel(0);};Spry.Widget.SlidingPanels.prototype.showLastPanel=function(){return this.showPanel(this.getContentPanels().length-1);};Spry.Widget.SlidingPanels.prototype.showPreviousPanel=function(){return this.showPanel(this.getContentPanelIndex(this.currentPanel)-1);};Spry.Widget.SlidingPanels.prototype.showNextPanel=function(){return this.showPanel(this.getContentPanelIndex(this.currentPanel)+1);};Spry.Widget.SlidingPanels.PanelAnimator=function(ele,curX,curY,dstX,dstY,opts){this.element=ele;this.curX=curX;this.curY=curY;this.dstX=dstX;this.dstY=dstY;this.fps=60;this.duration=500;this.transition=Spry.Widget.SlidingPanels.PanelAnimator.defaultTransition;this.startTime=0;this.timerID=0;this.finish=null;var self=this;this.intervalFunc=function(){self.step();};Spry.Widget.SlidingPanels.setOptions(this,opts,true);this.interval=1000/this.fps;};Spry.Widget.SlidingPanels.PanelAnimator.defaultTransition=function(time,begin,finish,duration){time/=duration;return begin+((2-time)*time*finish);};Spry.Widget.SlidingPanels.PanelAnimator.prototype.start=function(){this.stop();this.startTime=(new Date()).getTime();this.timerID=setTimeout(this.intervalFunc,this.interval);};Spry.Widget.SlidingPanels.PanelAnimator.prototype.stop=function(){if(this.timerID){clearTimeout(this.timerID);}this.timerID=0;};Spry.Widget.SlidingPanels.PanelAnimator.prototype.step=function(){var elapsedTime=(new Date()).getTime()-this.startTime;var done=elapsedTime>=this.duration;var x,y;if(done){x=this.curX=this.dstX;y=this.curY=this.dstY;}else{x=this.transition(elapsedTime,this.curX,this.dstX-this.curX,this.duration);y=this.transition(elapsedTime,this.curY,this.dstY-this.curY,this.duration);}this.element.style.left=x+"px";this.element.style.top=y+"px";if(!done){this.timerID=setTimeout(this.intervalFunc,this.interval);}else{if(this.finish){this.finish();}}};