[javascript]代码库
//滚动图片构造函数
function ScrollPic(scrollContId,arrLeftId,arrRightId,dotListId,listType){
this.scrollContId = scrollContId; //内容容器ID
this.arrLeftId = arrLeftId; //左箭头ID
this.arrRightId = arrRightId; //右箭头ID
this.dotListId = dotListId; //点列表ID
this.listType = listType; //列表类型
this.dotClassName = "dotItem";//点className
this.dotOnClassName = "dotItemOn";//当前点className
this.dotObjArr = [];
this.listEvent = "onclick";
this.circularly = true; //循环滚动(无缝循环)
this.pageWidth = 0; //翻页宽度
this.frameWidth = 0; //显示框宽度
this.speed = 10; //移动速度(单位毫秒,越小越快)
this.space = 10; //每次移动像素(单位px,越大越快)
this.scrollWidth = 5; //横向滚动宽度
this.upright = false; //垂直的滚动
this.pageIndex = 0;
this.autoPlay = true;
this.autoPlayTime = 2; //秒
this._autoTimeObj;
this._scrollTimeObj;
this._state = "ready"; // ready | floating | stoping
this.stripDiv = document.createElement("DIV");
this.lDiv01 = document.createElement("DIV");
this.lDiv02 = document.createElement("DIV");
};
ScrollPic.prototype = {
version : "1.41",
author : "mengjia",
pageLength : 0,
touch : true,
initialize : function(){ //初始化
var thisTemp = this;
if(!this.scrollContId){
throw new Error("必须指定scrollContId.");
return;
};
this.scDiv = this.$(this.scrollContId);
if(!this.scDiv){
throw new Error("scrollContId不是正确的对象.(scrollContId = \""+ this.scrollContId +"\")");
return;
};
this.scDiv.style[this.upright?'height':'width'] = this.frameWidth + "px";
this.scDiv.style.overflow = "hidden";
//HTML
this.lDiv01.innerHTML = this.scDiv.innerHTML;
this.scDiv.innerHTML = "";
this.scDiv.appendChild(this.stripDiv);
this.stripDiv.appendChild(this.lDiv01);
if(this.circularly){//无缝循环
this.stripDiv.appendChild(this.lDiv02);
this.lDiv02.innerHTML = this.lDiv01.innerHTML
};
this.stripDiv.style.overflow = "hidden";
this.stripDiv.style.zoom = "1";
this.stripDiv.style[this.upright?'height':'width'] = "32766px";
if(!this.upright){
this.lDiv01.style.cssFloat = "left";
this.lDiv01.style.styleFloat = "left";
this.lDiv01.style.overflow = "hidden";
};
this.lDiv01.style.zoom = "1";
if(this.circularly && !this.upright){ //无缝循环设置CSS
this.lDiv02.style.cssFloat = "left";
this.lDiv02.style.styleFloat = "left";
this.lDiv02.style.overflow = "hidden";
};
this.lDiv02.style.zoom = "1";
this.addEvent(this.scDiv,"mouseover",function(){thisTemp.stop()});
this.addEvent(this.scDiv,"mouseout",function(){thisTemp.play()});
//Arrowhead event
//left
if(this.arrLeftId){
this.alObj = this.$(this.arrLeftId);
if(this.alObj){
this.addEvent(this.alObj,"mousedown",function(){thisTemp.rightMouseDown()});
this.addEvent(this.alObj,"mouseup",function(){thisTemp.rightEnd()});
this.addEvent(this.alObj,"mouseout",function(){thisTemp.rightEnd()});
};
};
//right
if(this.arrRightId){
this.arObj = this.$(this.arrRightId);
if(this.arObj){
this.addEvent(this.arObj,"mousedown",function(){thisTemp.leftMouseDown()});
this.addEvent(this.arObj,"mouseup",function(){thisTemp.leftEnd()});
this.addEvent(this.arObj,"mouseout",function(){thisTemp.leftEnd()});
};
};
var pages = Math.ceil(this.lDiv01[this.upright?'offsetHeight':'offsetWidth'] / this.frameWidth),i,tempObj;
this.pageLength = pages;
//dot
if(this.dotListId){
this.dotListObj = this.$(this.dotListId);
this.dotListObj.innerHTML = "";
if(this.dotListObj){
for(i=0;i<pages;i++){
tempObj = document.createElement("span");
this.dotListObj.appendChild(tempObj);
this.dotObjArr.push(tempObj);
if(i==this.pageIndex){
tempObj.className = this.dotOnClassName;
}else{
tempObj.className = this.dotClassName;
};
if(this.listType == 'number'){
tempObj.innerHTML = i+1;
}else if(typeof (this.listType) =='string' ){
tempObj.innerHTML = this.listType;
}else {
tempObj.innerHTML='';
};
tempObj.title = "第" + (i+1) + "页";
tempObj.num = i;
tempObj[this.listEvent] = function(){thisTemp.pageTo(this.num)};
};
};
};
this.scDiv[this.upright?'scrollTop':'scrollLeft'] = 0;
//autoPlay
if(this.autoPlay){this.play()};
this._scroll = this.upright?'scrollTop':'scrollLeft';
this._sWidth = this.upright?'scrollHeight':'scrollWidth';
if(typeof(this.onpagechange) === 'function'){
this.onpagechange();
};
this.iPad();
},
leftMouseDown : function(){
if(this._state != "ready"){return};
var thisTemp = this;
this._state = "floating";
clearInterval(this._scrollTimeObj);
this.moveLeft();
this._scrollTimeObj = setInterval(function(){thisTemp.moveLeft()},this.speed);
},
rightMouseDown : function(){
if(this._state != "ready"){return};
var thisTemp = this;
this._state = "floating";
clearInterval(this._scrollTimeObj);
this.moveRight();
this._scrollTimeObj = setInterval(function(){thisTemp.moveRight()},this.speed);
},
moveLeft : function(){
if(this.circularly){ //无缝循环
if(this.scDiv[this._scroll] + this.space >= this.lDiv01[this._sWidth]){
this.scDiv[this._scroll] = this.scDiv[this._scroll] + this.space - this.lDiv01[this._sWidth];
}else{
this.scDiv[this._scroll] += this.space;
};
}else{
if(this.scDiv[this._scroll] + this.space >= this.lDiv01[this._sWidth] - this.frameWidth){
this.scDiv[this._scroll] = this.lDiv01[this._sWidth] - this.frameWidth;
//停
this.leftEnd();
}else{
this.scDiv[this._scroll] += this.space;
};
};
this.accountPageIndex();
},
moveRight : function(){
if(this.circularly){ //无缝循环
if(this.scDiv[this._scroll] - this.space <= 0){
this.scDiv[this._scroll] = this.lDiv01[this._sWidth] + this.scDiv[this._scroll] - this.space;
}else{
this.scDiv[this._scroll] -= this.space;
};
}else{
if(this.scDiv[this._scroll] - this.space <= 0){
this.scDiv[this._scroll] = 0;
//停
this.rightEnd();
}else{
this.scDiv[this._scroll] -= this.space;
};
};
this.accountPageIndex();
},
leftEnd : function(){
if(this._state != "floating" && this._state != 'touch'){return};
this._state = "stoping";
clearInterval(this._scrollTimeObj);
var fill = this.pageWidth - this.scDiv[this._scroll] % this.pageWidth;
this.move(fill);
},
rightEnd : function(){
if(this._state != "floating" && this._state != 'touch'){return};
this._state = "stoping";
clearInterval(this._scrollTimeObj);
var fill = - this.scDiv[this._scroll] % this.pageWidth;
this.move(fill);
},
move : function(num,quick){
var thisTemp = this;
var thisMove = num/5;
var theEnd = false;
if(!quick){
if(thisMove > this.space){thisMove = this.space};
if(thisMove < -this.space){thisMove = -this.space};
};
if(Math.abs(thisMove)<1 && thisMove!=0){
thisMove = thisMove>=0?1:-1;
}else{
thisMove = Math.round(thisMove);
};
var temp = this.scDiv[this._scroll] + thisMove;
if(thisMove>0){
if(this.circularly){ //无缝循环
if(this.scDiv[this._scroll] + thisMove >= this.lDiv01[this._sWidth]){
this.scDiv[this._scroll] = this.scDiv[this._scroll] + thisMove - this.lDiv01[this._sWidth];
}else{
this.scDiv[this._scroll] += thisMove;
};
}else{
if(this.scDiv[this._scroll] + thisMove >= this.lDiv01[this._sWidth] - this.frameWidth){
this.scDiv[this._scroll] = this.lDiv01[this._sWidth] - this.frameWidth;
this._state = "ready";
theEnd = true;
//return;
}else{
this.scDiv[this._scroll] += thisMove;
};
};
}else{
if(this.circularly){ //无缝循环
if(this.scDiv[this._scroll] + thisMove < 0){
this.scDiv[this._scroll] = this.lDiv01[this._sWidth] + this.scDiv[this._scroll] + thisMove;
}else{
this.scDiv[this._scroll] += thisMove;
};
}else{
if(this.scDiv[this._scroll] - thisMove < 0){
this.scDiv[this._scroll] = 0;
this._state = "ready";
theEnd = true;
//return;
}else{
this.scDiv[this._scroll] += thisMove;
};
};
};
if(typeof(this.onpagechange) === 'function'){
this.onpagechange();
};
if(theEnd){
return;
};
num -= thisMove;
if(Math.abs(num) == 0){
this._state = "ready";
if(this.autoPlay){this.play()};
this.accountPageIndex();
return;
}else{
this.accountPageIndex();
this._scrollTimeObj = setTimeout(function(){thisTemp.move(num,quick)},this.speed)
};
},
pre : function(){
if(this._state != "ready"){return};
this._state = "stoping";
this.pageTo(this.pageIndex - 1);
},
next : function(reStar){
if(this._state != "ready"){return};
this._state = "stoping";
if(this.circularly){
this.pageTo(this.pageIndex + 1);
}else{
if(this.scDiv[this._scroll] >= this.lDiv01[this._sWidth] - this.frameWidth){
this._state = "ready";
if(reStar){this.pageTo(0)};
}else{
this.pageTo(this.pageIndex + 1);
};
};
},
play : function(){
var thisTemp = this;
if(!this.autoPlay){return};
clearInterval(this._autoTimeObj);
this._autoTimeObj = setInterval(function(){thisTemp.next(true)},this.autoPlayTime * 1000);
},
stop : function(){
clearInterval(this._autoTimeObj);
},
pageTo : function(num){
if(this.pageIndex == num){return};
if(num < 0){num = this.pageLength - 1};
clearTimeout(this._scrollTimeObj);
this._state = "stoping";
var fill = num * this.frameWidth - this.scDiv[this._scroll];
this.move(fill,true);
},
accountPageIndex : function(){
var pageIndex = Math.floor(this.scDiv[this._scroll] / this.frameWidth);
if(pageIndex == this.pageIndex){return};
this.pageIndex = pageIndex;
if(this.pageIndex > Math.floor(this.lDiv01[this.upright?'offsetHeight':'offsetWidth'] / this.frameWidth )){this.pageIndex = 0};
if(typeof(this.onnowpage) === 'function'){
this.onnowpage(this.pageIndex);
}
var i;
//alert(this.pageIndex);
for(i=0;i<this.dotObjArr.length;i++){
if(i==this.pageIndex){
this.dotObjArr[i].className = this.dotOnClassName;
}else{
this.dotObjArr[i].className = this.dotClassName;
};
};
if(typeof(this.onpagechange) === 'function'){
this.onpagechange();
};
},
iPadX : 0,
iPadLastX : 0,
iPadStatus : 'ok',
iPad : function(){
if(typeof(window.ontouchstart) === 'undefined'){ //不支持触屏
return;
};
if(!this.touch){return};
var tempThis = this;
this.addEvent(this.scDiv,'touchstart',function(e){tempThis._touchstart(e)});
this.addEvent(this.scDiv,'touchmove',function(e){tempThis._touchmove(e)});
this.addEvent(this.scDiv,'touchend',function(e){tempThis._touchend(e)});
},
_touchstart : function(e){
//if(this._state != "ready"){return};
//this._state = 'touch';
this.stop();
this.iPadX = e.touches[0].pageX;
this.iPadScrollX = window.pageXOffset;
this.iPadScrollY = window.pageYOffset; //用于判断页面是否滚动
this.scDivScrollLeft = this.scDiv[this._scroll];
},
_touchmove : function(e){
if(e.touches.length > 1){ //多点触摸
this.iPadStatus = 'ok';
return;
};
this.iPadLastX = e.touches[0].pageX;
var cX = this.iPadX - this.iPadLastX;
if(this.iPadStatus == 'ok'){
if(this.iPadScrollY == window.pageYOffset && this.iPadScrollX == window.pageXOffset && Math.abs(cX)>this.scrollWidth){ //横向触摸
this.iPadStatus = 'touch';
}else{
return;
};
};
this._state = 'touch';
var scrollNum = this.scDivScrollLeft + cX;
if(scrollNum >= this.lDiv01[this._sWidth]){
scrollNum = scrollNum - this.lDiv01[this._sWidth];
};
if(scrollNum < 0){
scrollNum = scrollNum + this.lDiv01[this._sWidth];
};
this.scDiv[this._scroll] = scrollNum;
e.preventDefault();
},
_touchend : function(e){
if(this.iPadStatus != 'touch'){return};
this.iPadStatus = 'ok';
//this._state = 'ready';
var cX = this.iPadX - this.iPadLastX;
if(cX<0){
this.rightEnd();
}else{
this.leftEnd();
};
this.play();
},
$ : function(objName){if(document.getElementById){return eval('document.getElementById("'+objName+'")')}else{return eval('document.all.'+objName)}},
isIE : navigator.appVersion.indexOf("MSIE")!=-1?true:false,
//Event
addEvent : function(obj,eventType,func){if(obj.attachEvent){obj.attachEvent("on" + eventType,func);}else{obj.addEventListener(eventType,func,false)}},
delEvent : function(obj,eventType,func){
if(obj.detachEvent){obj.detachEvent("on" + eventType,func)}else{obj.removeEventListener(eventType,func,false)}
},
//Cookie
readCookie : function(l){var i="",I=l+"=";if(document.cookie.length>0){var offset=document.cookie.indexOf(I);if(offset!=-1){offset+=I.length;var end=document.cookie.indexOf(";",offset);if(end==-1)end=document.cookie.length;i=unescape(document.cookie.substring(offset,end))}};return i},
writeCookie : function(O,o,l,I){var i="",c="";if(l!=null){i=new Date((new Date).getTime()+l*3600000);i="; expires="+i.toGMTString()};if(I!=null){c=";domain="+I};document.cookie=O+"="+escape(o)+i+c},
//Style
readStyle:function(i,I){if(i.style[I]){return i.style[I]}else if(i.currentStyle){return i.currentStyle[I]}else if(document.defaultView&&document.defaultView.getComputedStyle){var l=document.defaultView.getComputedStyle(i,null);return l.getPropertyValue(I)}else{return null}}
};