javascript动态创建可拖动、最大化、最小化的层

javascript动态创建可拖动、最大化、最小化的层

2010-02-06 13:19

　　用Javascript实现div层的拖动是很常见的一种操作，比如弹出提示对话框，快捷登录等等。之前用隐藏层的方式实现了div层的弹出操作，仅仅用到了js修改style的display属性。现在，需要弹出许多可以拖动的窗口，这些窗口之前并不存在于dom，而是根据用户点击动态创建的，于是需要写一个js的类，用于实现div层的动态弹出，而且具有最大化、最小化、关闭等操作。效果如下图：

（一个打开的窗口）

（最小化窗口）

（打开两个窗口）　　

js类的实现方式如下：

 

var Dialog = function() {    var options = arguments[0] || {};    this.title = options.title || "新窗口";    this.width = options.width || 400;    this.height = options.height || 300;    this.html = options.html || "";    this.left = options.left || document.documentElement.scrollLeft + document.documentElement.clientWidth / 2 - this.width / 2;    this.top = options.top || document.documentElement.scrollTop + document.documentElement.clientHeight / 2 - this.height / 2;    this.container = document.createElement("div");    this.head = document.createElement("div");    this.content = document.createElement("div");    this.dialogclose = document.createElement("span");    this.dialogmin = document.createElement("span");    this.dialogmax = document.createElement("span");    this.init();};Dialog.prototype = {    init: function() {        var me = this, container = me.container, head = me.head, content = me.content, dminw = me.dialogmin, dclose = me.dialogclose, dmaxw = me.dialogmax, left = me.left, top = me.top;        title = me.title, width = me.width, height = me.height, html = me.html;        container.appendChild(head);        container.appendChild(content);        container.style.fontFamily = "微软雅黑";        container.style.width = width + "px";        container.style.height = "auto";        container.style.border = "solid 10px #CCC";        container.style.zIndex = "100";        container.style.background = "#FFF";        container.style.position = "absolute";        container.style.left = left + "px";        container.style.top = top + "px";        document.body.appendChild(container);        head.style.background = "#F4F4F4";        head.style.padding = content.style.padding = "5px";        head.style.borderBottom = "dotted 1px #666";        head.style.cursor = "move";        head.style.width = me.width - 10 + "px";        dminw.onclick = function() { me.miniw(me); };        dminw.innerHTML = "最小化";        dmaxw.onclick = function() { me.maxw(me); };        dmaxw.innerHTML = "最大化";        dmaxw.style.display = "none";        dclose.onclick = function() { me.hide(me); };        dclose.innerHTML = "关闭";        head.innerHTML = title;        head.appendChild(dclose);        head.appendChild(dmaxw);        head.appendChild(dminw);        content.style.height = height + "px";        content.style.overflow = "scroll";        content.style.overflowX = "hidden";        content.style.        content.innerHTML = html;        head.onmousedown = function(e) {            e = e || window.event;            container.posX = e.clientX - container.offsetLeft;            container.posY = e.clientY - container.offsetTop;            document.onmousemove = function(e) {                me.drag(e, me);            };            document.onmouseup = function() {                document.onmousemove = null;                document.onmouseup = null;            };        };    },    drag: function(e, me) {        e = e || window.event;        var o = me.container;        o.style.left = (((e.clientX - o.posX) >= 0) ? e.clientX - o.posX : 0) + "px";        o.style.top = (((e.clientY - o.posY) >= 0) ? e.clientY - o.posY : 0) + "px";    },    show: function(me) {        var o = me.container;        o.style.display = "block";    },    hide: function(me) {        var o = me.container;        o.style.display = "none";    },    miniw: function(me) {        var o = me.container;        me.content.style.display = "none";        me.dialogmax.style.display = "inline";        me.dialogmin.style.display = "none";        o.style.height = me.head.style.height;        me.head.style.borderBottom = "";    },    maxw: function(me) {        var o = me.container;        me.content.style.display = "block";        me.dialogmin.style.display = "inline";        me.dialogmax.style.display = "none";        o.style.height = "auto";        me.head.style.borderBottom = "dotted 1px #666";    }};

　　调用方法很简单，如下：

var CatalogDialog = new Dialog({ width: 300, height: 300, title: "这里是标题" });CatalogDialog.content.innerHTML = "×××";//这里设置窗口内容
CatalogDialog.hide();//关闭
CatalogDialog.show();//显示
CatalogDialog.miniw();//最小化
CatalogDialog.maxw();//最大化