JS相册图片抖动放大展示效果的示例代码


Posted in Javascript onJanuary 29, 2021

上篇文章给大家介绍了JS实现简单抖动效果,感兴趣的朋友点击查看。

今天给大家分享JS相册图片抖动放大展示效果,效果图如下所示:

JS相册图片抖动放大展示效果的示例代码

var xm;
var ym;
 
/* ==== onmousemove event ==== */
document.onmousemove = function(e){
	if(window.event) e=window.event;
	xm = (e.x || e.clientX);
	ym = (e.y || e.clientY);
}
 
/* ==== window resize ==== */
function resize() {
	if(diapo)diapo.resize();
}
onresize = resize;
 
/* ==== opacity ==== */
setOpacity = function(o, alpha){
	if(o.filters)o.filters.alpha.opacity = alpha * 100; else o.style.opacity = alpha;
}
 
 
 
/* ===== encapsulate script ==== */
diapo = {
	O : [],
	DC : 0,
	img : 0,
	txt : 0,
	N : 0,
	xm : 0,
	ym : 0,
	nx : 0,
	ny : 0,
	nw : 0,
	nh : 0,
	rs : 0,
	rsB : 0,
	zo : 0,
	tx_pos : 0,
	tx_var : 0,
	tx_target : 0,
 
	/// script parameters 
	attraction : 2,
	acceleration : .9,
	dampening : .1,
	zoomOver : 2,
	zoomClick : 6,
	transparency : .8,
	font_size: 18,
	//
 
	/* ==== diapo resize ==== */
	resize : function(){
		with(this){
			nx = DC.offsetLeft;
			ny = DC.offsetTop;
			nw = DC.offsetWidth;
			nh = DC.offsetHeight;
			txt.style.fontSize = Math.round(nh / font_size) + "px";
			if(Math.abs(rs-rsB)<100) for(var i=0; i<N; i++) O[i].resize();
			rsB = rs;
		}
	},
 
	/* ==== create diapo ==== */
	CDiapo : function(o){
		/* ==== init variables ==== */
		this.o    = o;
		this.x_pos  = this.y_pos  = 0;
		this.x_origin = this.y_origin = 0;
		this.x_var  = this.y_var  = 0;
		this.x_target = this.y_target = 0;
		this.w_pos  = this.h_pos  = 0;
		this.w_origin = this.h_origin = 0;
		this.w_var  = this.h_var  = 0;
		this.w_target = this.h_target = 0;
		this.over   = false;
		this.click  = false;
 
		/* ==== create shadow ==== */
		this.spa = document.createElement("span");
		this.spa.className = "spaDC";
		diapo.DC.appendChild(this.spa);
 
		/* ==== create thumbnail image ==== */
		this.img = document.createElement("img");
		this.img.className = "imgDC";
		this.img.src = o.src;
		this.img.O = this;
		diapo.DC.appendChild(this.img);
		setOpacity(this.img, diapo.transparency);
 
		/* ==== mouse events ==== */
		this.img.onselectstart = new Function("return false;");
		this.img.ondrag = new Function("return false;");
		this.img.onmouseover = function(){
			diapo.tx_target=0;
			diapo.txt.innerHTML=this.O.o.alt;
			this.O.over=true;
			setOpacity(this,this.O.click?diapo.transparency:1);
		}
		this.img.onmouseout = function(){
			diapo.tx_target=-diapo.nw;
			this.O.over=false;
			setOpacity(this,diapo.transparency);
		}
		this.img.onclick = function() {
			if(!this.O.click){
				if(diapo.zo && diapo.zo != this) diapo.zo.onclick();
				this.O.click = true;
				this.O.x_origin = (diapo.nw - (this.O.w_origin * diapo.zoomClick)) / 2;
				this.O.y_origin = (diapo.nh - (this.O.h_origin * diapo.zoomClick)) / 2;
				diapo.zo = this;
				setOpacity(this,diapo.transparency);
			} else {
				this.O.click = false;
				this.O.over = false;
				this.O.resize();
				diapo.zo = 0;
			}
		}
 
		/* ==== rearrange thumbnails based on "imgsrc" images position ==== */
		this.resize = function (){
			with (this) {
				x_origin = o.offsetLeft;
				y_origin = o.offsetTop;
				w_origin = o.offsetWidth;
				h_origin = o.offsetHeight;
			}
		}
 
		/* ==== animation function ==== */
		this.position = function (){
			with (this) {
				/* ==== set target position ==== */
				w_target = w_origin;
				h_target = h_origin;
				if(over){
					/* ==== mouse over ==== */
					w_target = w_origin * diapo.zoomOver;
					h_target = h_origin * diapo.zoomOver;
					x_target = diapo.xm - w_pos / 2 - (diapo.xm - (x_origin + w_pos / 2)) / (diapo.attraction*(click?10:1));
					y_target = diapo.ym - h_pos / 2 - (diapo.ym - (y_origin + h_pos / 2)) / (diapo.attraction*(click?10:1));
				} else {
					/* ==== mouse out ==== */
					x_target = x_origin;
					y_target = y_origin;
				}
				if(click){
					/* ==== clicked ==== */
					w_target = w_origin * diapo.zoomClick;
					h_target = h_origin * diapo.zoomClick;
				}
 
				/* ==== magic spring equations ==== */
				x_pos += x_var = x_var * diapo.acceleration + (x_target - x_pos) * diapo.dampening;
				y_pos += y_var = y_var * diapo.acceleration + (y_target - y_pos) * diapo.dampening;
				w_pos += w_var = w_var * (diapo.acceleration * .5) + (w_target - w_pos) * (diapo.dampening * .5);
				h_pos += h_var = h_var * (diapo.acceleration * .5) + (h_target - h_pos) * (diapo.dampening * .5);
				diapo.rs += (Math.abs(x_var) + Math.abs(y_var));
 
				/* ==== html animation ==== */
				with(img.style){
					left  = Math.round(x_pos) + "px";
					top  = Math.round(y_pos) + "px";
					width = Math.round(Math.max(0, w_pos)) + "px";
					height = Math.round(Math.max(0, h_pos)) + "px";
					zIndex = Math.round(w_pos);
				}
				with(spa.style){
					left  = Math.round(x_pos + w_pos * .1) + "px";
					top  = Math.round(y_pos + h_pos * .1) + "px";
					width = Math.round(Math.max(0, w_pos * 1.1)) + "px";
					height = Math.round(Math.max(0, h_pos * 1.1)) + "px";
					zIndex = Math.round(w_pos);
				}
			}
		}
	},
 
	/* ==== main loop ==== */
	run : function(){
		diapo.xm = xm - diapo.nx;
		diapo.ym = ym - diapo.ny;
		/* ==== caption anim ==== */
		diapo.tx_pos += diapo.tx_var = diapo.tx_var * .9 + (diapo.tx_target - diapo.tx_pos) * .02;
		diapo.txt.style.left = Math.round(diapo.tx_pos) + "px";
		/* ==== images anim ==== */
		for(var i in diapo.O) diapo.O[i].position();
		/* ==== loop ==== */
		setTimeout("diapo.run();", 16);
	},
 
	/* ==== load images ==== */
	images_load : function(){
		// ===== loop until all images are loaded =====
		var M = 0;
		for(var i=0; i<diapo.N; i++) {
			if(diapo.img[i].complete) {
				diapo.img[i].style.position = "relative";
				diapo.O[i].img.style.visibility = "visible";
				diapo.O[i].spa.style.visibility = "visible";
				M++;
			}
			resize();
		}
		if(M<diapo.N) setTimeout("diapo.images_load();", 128);
	},
 
	/* ==== init script ==== */
	init : function() {
		diapo.DC = document.getElementById("diapoContainer");
		diapo.img = diapo.DC.getElementsByTagName("img");
		diapo.txt = document.getElementById("caption");
		diapo.N = diapo.img.length;
		for(i=0; i<diapo.N; i++) diapo.O.push(new diapo.CDiapo(diapo.img[i]));
		diapo.resize();
		diapo.tx_pos = -diapo.nw;
		diapo.tx_target = -diapo.nw;
		diapo.images_load();
		diapo.run();
	}
}
 
/* ==== start script ==== */
function dom_onload() {
	if(document.getElementById("diapoContainer")) diapo.init(); else setTimeout("dom_onload();", 128);
}
dom_onload();

到此这篇关于JS相册图片抖动放大展示效果的示例代码的文章就介绍到这了,更多相关js图片放大抖动内容请搜索三水点靠木以前的文章或继续浏览下面的相关文章希望大家以后多多支持三水点靠木!

Javascript 相关文章推荐
jQuery+CSS 半开折叠效果原理及代码(自写)
Mar 04 Javascript
jQuery+JSON+jPlayer实现QQ空间音乐查询功能示例
Jun 17 Javascript
用jQuery获取IE9下拉框默认值问题探讨
Jul 22 Javascript
js 赋值包含单引号双引号问题的解决方法
Feb 26 Javascript
基于zepto.js实现仿手机QQ空间的大图查看组件ImageView.js详解
Mar 05 Javascript
浏览器环境下JavaScript脚本加载与执行探析之defer与async特性
Jan 14 Javascript
JS操作COOKIE实现备忘记录的方法
Apr 01 Javascript
浅谈Jquery中Ajax异步请求中的async参数的作用
Jun 06 Javascript
JavaScript递归操作实例浅析
Oct 31 Javascript
Vue2 SSR渲染根据不同页面修改 meta
Nov 20 Javascript
JS封装的模仿qq右下角消息弹窗功能示例
Aug 22 Javascript
vue模块移动组件的实现示例
May 20 Javascript
vue监听键盘事件的相关总结
Jan 29 #Vue.js
javascript实现拼图游戏
Jan 29 #Javascript
JS hasOwnProperty()方法检测一个属性是否是对象的自有属性的方法
Jan 29 #Javascript
Javascript实现打鼓效果
Jan 29 #Javascript
JS实现点击掉落特效
Jan 29 #Javascript
Javascript实现关闭广告效果
Jan 29 #Javascript
Vue 实例中使用$refs的注意事项
Jan 29 #Vue.js
You might like
php中error与exception的区别及应用
2014/07/28 PHP
php使用date和strtotime函数输出指定日期的方法
2014/11/14 PHP
php对象和数组相互转换的方法
2015/05/12 PHP
PHP进制转换实例分析(2,8,16,36,64进制至10进制相互转换)
2017/02/04 PHP
一实用的实现table排序的Javascript类库
2007/09/12 Javascript
JavaScript实现非常简单实用的下拉菜单效果
2015/08/27 Javascript
谈谈JSON对象和字符串之间的相互转换JSON.stringify(obj)和JSON.parse(string)
2015/10/01 Javascript
详解JavaScript编程中的数组结构
2015/10/24 Javascript
js实现table添加行tr、删除行tr、清空行tr的简单实例
2016/10/15 Javascript
Javascript的动态增加类的实现方法
2016/10/20 Javascript
利用fecha进行JS日期处理
2016/11/21 Javascript
Angular2.0/4.0 使用Echarts图表的示例代码
2017/12/07 Javascript
150行代码带你实现微信小程序中的数据侦听
2019/05/17 Javascript
深入理解JS异步编程-Promise
2019/06/03 Javascript
关于vue项目中搜索节流的实现代码
2019/09/17 Javascript
js实现百度登录窗口拖拽效果
2020/03/19 Javascript
python调用java的Webservice示例
2014/03/10 Python
Python处理字符串之isspace()方法的使用
2015/05/19 Python
Python中用字符串调用函数或方法示例代码
2017/08/04 Python
python opencv 图像拼接的实现方法
2019/06/27 Python
Python读取xlsx文件的实现方法
2019/07/04 Python
python用pip install时安装失败的一系列问题及解决方法
2020/02/24 Python
python如何调用字典的key
2020/05/25 Python
python3.6.5基于kerberos认证的hive和hdfs连接调用方式
2020/06/06 Python
美国室内盆栽植物购买网站:Plants.com
2020/04/24 全球购物
办公室文秘自我鉴定
2013/09/21 职场文书
数控专业大学毕业生职业规划范文
2014/02/06 职场文书
倡议书格式范文
2014/04/14 职场文书
三严三实对照检查材料
2014/08/25 职场文书
教师四风问题对照检查材料
2014/09/26 职场文书
陕西导游词
2015/02/04 职场文书
财务统计员岗位职责
2015/04/14 职场文书
地球上的星星观后感
2015/06/02 职场文书
追悼词范文大全
2015/06/23 职场文书
祝福语集锦:送给毕业同学祝福语
2019/11/21 职场文书
Redis主从复制操作和配置详情
2022/09/23 Redis