JavaScript

超轻量级php框架startmvc

基于Marquee.js插件实现的跑马灯效果示例

更新时间:2020-04-21 00:28:11 作者:startmvc
本文实例讲述了基于Marquee.js插件实现的跑马灯效果。分享给大家供大家参考,具体如下:1

本文实例讲述了基于Marquee.js插件实现的跑马灯效果。分享给大家供大家参考,具体如下:

1、Marquee.js文件


/****************************************************************
- Marquee.js
- 参数:
- ID:滚动对象(必须)
- Direction:滚动方向("top": 0, "up": 0, "bottom": 1, "down": 1, "left": 2, "right": 3)
- Step:步伐
- Width:宽度
- Height:高度
- Timer:影响步伐滚动速度
- DelayTime:延时时间
- WaitTime:初始化时的等待时间
- ScrollStep:卷页步伐
*****************************************************************/
function Marquee(obt) {
 if (obt == null || obt == "") {
 return;
 }
 this.ID = document.getElementById(obt.ID);
 if (!this.ID) {
 alert("初始化错误\r\n请检查标签id设置是否正确!");
 this.id = -1;
 return;
 }
 this.Direction = this.Width = this.Height = this.DelayTime = this.WaitTime = this.CTL = this.StartID = this.Stop = this.MouseOver = 0;
 this.Step = 1;
 this.Timer = 30;
 this.DirectionArray = { "top": 0, "up": 0, "bottom": 1, "down": 1, "left": 2, "right": 3 };
 if (typeof obt.Direction == "number" && obt.Direction) this.Direction = obt.Direction;
 if (typeof obt.Direction == "string" && obt.Direction) this.Direction = this.DirectionArray[obt.Direction.toString().toLowerCase()];
 if (typeof obt.Step == "number" && obt.Step) this.Step = obt.Step;
 if (typeof obt.Width == "number" && obt.Width) this.Width = obt.Width;
 if (typeof obt.Height == "number" && obt.Height) this.Height = obt.Height;
 if (typeof obt.Timer == "number" && obt.Timer) this.Timer = obt.Timer;
 if (typeof obt.DelayTime == "number" && obt.DelayTime) this.DelayTime = obt.DelayTime;
 if (typeof obt.WaitTime == "number" && obt.WaitTime) this.WaitTime = obt.WaitTime;
 if (typeof obt.ScrollStep == "number" && obt.ScrollStep) this.ScrollStep = obt.ScrollStep;
 this.ID.style.overflow = this.ID.style.overflowX = this.ID.style.overflowY = "hidden";
 this.ID.noWrap = true;
 this.IsNotOpera = (navigator.userAgent.toLowerCase().indexOf("opera") == -1);
 this.Start();
}
Marquee.prototype.Start = function() {
 if (this.ID == -1) return;
 if (this.Width == 0) this.Width = parseInt(this.ID.style.width);
 if (this.Height == 0) this.Height = parseInt(this.ID.style.height);
 if (this.Timer < 20) this.Timer = 20;
 if (this.WaitTime < 800) this.WaitTime = 800;
 this.HalfWidth = Math.round(this.Width / 2);
 this.HalfHeight = Math.round(this.Height / 2);
 this.BakStep = this.Step;
 this.ID.style.width = this.Width + "px";
 this.ID.style.height = this.Height + "px";
 if (typeof this.ScrollStep != "number") this.ScrollStep = this.Direction > 1 ? this.Width : this.Height;
 var templateLeft = "<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;display:inline;'><tr><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td></tr></table>";
 var templateTop = "<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;'><tr><td>MSCLASS_TEMP_HTML</td></tr><tr><td>MSCLASS_TEMP_HTML</td></tr></table>";
 var msobj = this;
 msobj.tempHTML = msobj.ID.innerHTML;
 if (msobj.Direction <= 1) {
 msobj.ID.innerHTML = templateTop.replace(/MSCLASS_TEMP_HTML/g, msobj.ID.innerHTML);
 }
 else {
 if (msobj.ScrollStep == 0 && msobj.DelayTime == 0) {
 msobj.ID.innerHTML += msobj.ID.innerHTML;
 }
 else {
 msobj.ID.innerHTML = templateLeft.replace(/MSCLASS_TEMP_HTML/g, msobj.ID.innerHTML);
 }
 }
 var timer = this.Timer;
 var delaytime = this.DelayTime;
 var waittime = this.WaitTime;
 msobj.StartID = function() { msobj.Scroll() }
 msobj.Continue = function() {
 if (msobj.MouseOver == 1) {
 setTimeout(msobj.Continue, delaytime);
 }
 else {
 clearInterval(msobj.TimerID);
 msobj.CTL = msobj.Stop = 0;
 msobj.TimerID = setInterval(msobj.StartID, timer);
 }
 }
 msobj.Pause = function() {
 msobj.Stop = 1;
 clearInterval(msobj.TimerID);
 setTimeout(msobj.Continue, delaytime);
 }
 msobj.Begin = function() {
 msobj.ClientScroll = msobj.Direction > 1 ? msobj.ID.scrollWidth / 2 : msobj.ID.scrollHeight / 2;
 if ((msobj.Direction <= 1 && msobj.ClientScroll <= msobj.Height + msobj.Step) || (msobj.Direction > 1 && msobj.ClientScroll <= msobj.Width + msobj.Step)) {
 msobj.ID.innerHTML = msobj.tempHTML;
 delete (msobj.tempHTML);
 return;
 }
 delete (msobj.tempHTML);
 msobj.TimerID = setInterval(msobj.StartID, timer);
 if (msobj.ScrollStep < 0) return;
 msobj.ID.onmousemove = function(event) {
 if (msobj.ScrollStep == 0 && msobj.Direction > 1) {
 var event = event || window.event;
 if (window.event) {
 if (msobj.IsNotOpera) {
 msobj.EventLeft = event.srcElement.id == msobj.ID.id ? event.offsetX - msobj.ID.scrollLeft : event.srcElement.offsetLeft - msobj.ID.scrollLeft + event.offsetX;
 }
 else {
 msobj.ScrollStep = null;
 return;
 }
 }
 else {
 msobj.EventLeft = event.layerX - msobj.ID.scrollLeft;
 }
 msobj.Direction = msobj.EventLeft > msobj.HalfWidth ? 3 : 2;
 msobj.AbsCenter = Math.abs(msobj.HalfWidth - msobj.EventLeft);
 msobj.Step = Math.round(msobj.AbsCenter * (msobj.BakStep * 2) / msobj.HalfWidth);
 }
 }
 msobj.ID.onmouseover = function() {
 if (msobj.ScrollStep == 0) return;
 msobj.MouseOver = 1;
 clearInterval(msobj.TimerID);
 }
 msobj.ID.onmouseout = function() {
 if (msobj.ScrollStep == 0) {
 if (msobj.Step == 0) msobj.Step = 1;
 return;
 }
 msobj.MouseOver = 0;
 if (msobj.Stop == 0) {
 clearInterval(msobj.TimerID);
 msobj.TimerID = setInterval(msobj.StartID, timer);
 }
 }
 }
 setTimeout(msobj.Begin, waittime);
}
Marquee.prototype.Scroll = function() {
 switch (this.Direction) {
 case 0:
 this.CTL += this.Step;
 if (this.CTL >= this.ScrollStep && this.DelayTime > 0) {
 this.ID.scrollTop += this.ScrollStep + this.Step - this.CTL;
 this.Pause();
 return;
 }
 else {
 if (this.ID.scrollTop >= this.ClientScroll) {
 this.ID.scrollTop -= this.ClientScroll;
 }
 this.ID.scrollTop += this.Step;
 }
 break;
 case 1:
 this.CTL += this.Step;
 if (this.CTL >= this.ScrollStep && this.DelayTime > 0) {
 this.ID.scrollTop -= this.ScrollStep + this.Step - this.CTL;
 this.Pause();
 return;
 }
 else {
 if (this.ID.scrollTop <= 0) {
 this.ID.scrollTop += this.ClientScroll;
 }
 this.ID.scrollTop -= this.Step;
 }
 break;
 case 2:
 this.CTL += this.Step;
 if (this.CTL >= this.ScrollStep && this.DelayTime > 0) {
 this.ID.scrollLeft += this.ScrollStep + this.Step - this.CTL;
 this.Pause();
 return;
 }
 else {
 if (this.ID.scrollLeft >= this.ClientScroll) {
 this.ID.scrollLeft -= this.ClientScroll;
 }
 this.ID.scrollLeft += this.Step;
 }
 break;
 case 3:
 this.CTL += this.Step;
 if (this.CTL >= this.ScrollStep && this.DelayTime > 0) {
 this.ID.scrollLeft -= this.ScrollStep + this.Step - this.CTL;
 this.Pause();
 return;
 }
 else {
 if (this.ID.scrollLeft <= 0) {
 this.ID.scrollLeft += this.ClientScroll;
 }
 this.ID.scrollLeft -= this.Step;
 }
 break;
 }
}

2、脚本调用


window.onload = function() {
 new Marquee({ ID: "scrollNews", Direction: "top", Step: 2, Width: 0, Height: 80, Timer: 50, DelayTime: 1000, WaitTime: 1000, ScrollStep: 80 });
}

Marquee.js 插件 跑马灯