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JS实现可缩放、拖动、关闭和最小化的浮动窗口完整实例_javascript技巧

来源:华佗小知识


本文实例讲述了JS实现可缩放、拖动、关闭和最小化的浮动窗口方法。分享给大家供大家参考。具体实现方法如下:

代码如下:



JS实现可缩放、拖动、关闭和最小化的浮动窗口



var zindex=0 //全局变量
function dragClass(name,title,content,left,top,width,height){
var isMouseDown=false;
var maximum=false;
var offX=0; //设置抓取点X坐标
var offY=0; //设置抓取点Y坐标
var oldLeft; //保存正常状态的X坐标
var oldTop; //保存正常状态的Y坐标
this.mousedown= function (){ //按下拖动点
Bar.setCapture(); //设置抓取
offX=parseInt(event.clientX)-parseInt(Window.style.left);
offY=parseInt(event.clientY)-parseInt(Window.style.top);
isMouseDown=true;
if(Window.style.zIndex<=zindex){
zindex++;
Window.style.zIndex=zindex;
}
}
this.mousemove= function (){ //拖动窗口
if (isMouseDown && !maximum){
Bar.style.cursor='move'
Window.style.left=event.clientX-offX;
Window.style.top=event.clientY-offY;
if(Window.style.zIndex<=zindex){
zindex++;
Window.style.zIndex=zindex;
}
}
}
this.mouseup=function (){ //松开按钮
Bar.releaseCapture(); //取消抓取
Bar.style.cursor='hand';
if (parseInt(Window.style.top)<0){
Window.style.top='0px';
}
if (parseInt(Window.style.left)<0){
Window.style.left='0px';
}
isMouseDown=false;
}
this.dblclick=function (){ //双击最大最小化
if (!maximum){
oldLeft=Window.style.left; //保存正常状态的X坐标
oldTop=Window.style.top; //保存正常状态的Y坐标
Window.style.left='0px';
Window.style.top='0px';
Window.style.width= document.body.clientWidth; //网页可见区域宽
Title.style.width=(document.body.clientWidth-40)+'px'; //设置标题长度
ReSize.style.display='none';
if(Change.innerText=='-'){
Window.style.height='100%';
Content.style.height=document.body.clientHeight-20; //网页可见区域宽-标题高度
}else{
Window.style.height='20px';
}
maximum=true;
}else{
Window.style.left=oldLeft;
Window.style.top=oldTop;
Window.style.width=width+'px';
Title.style.width=(width-40)+'px';
ReSize.style.display='';
if(Change.innerText=='-'){
Window.style.height=height+'px';
Content.style.height=parseInt(height-20)+'px';
}else{
Window.style.height='20px';
}
maximum=false;
}
if(Window.style.zIndex<=zindex){
zindex++;
Window.style.zIndex=zindex;
}
}
this.changeWindow=function (){ //收缩窗口
event.cancelBubble=true;
if(Change.innerText=='-'){
Window.style.height='20px';
Change.innerText='□';
Content.style.display='none';
ReSize.style.display='none';
}else{
if (maximum){
Window.style.height='100%';
Content.style.display='';
ReSize.style.display='';
Content.style.height=document.body.clientHeight-20; //网页可见区域宽-标题高度
}else{
Window.style.height=height+'px';
Content.style.display='';
ReSize.style.display='';
Content.style.height=parseInt(height-20)+'px';
}
Change.innerText='-';
}
}

var Window=document.createElement("div");
Window.id="divWindow"+ name;
Window.className="divWindow";
Window.style.left=left+'px';
Window.style.top=top+'px';
Window.style.width=width+'px';
Window.style.height=height+'px';
Window.onclick=function(){
if(parseInt(Window.style.zIndex)<=zindex){
zindex++;
Window.style.zIndex=zindex;
}
}
this.Window=Window;
//公有属性,类外可操作;若要在类外操作,可将元素改为公有属性

var Bar=document.createElement("div");
Bar.id="divBar"+name;
Bar.onselectstart="return false";
Bar.className="divBar";
Bar.onmousedown=this.mousedown;
Bar.ondblclick=this.dblclick;
Bar.onmousemove=this.mousemove;
Bar.onmouseup=this.mouseup;
Window.appendChild(Bar);
var Title=document.createElement("span");
Title.id="divTitle"+ name;
Title.className="divTitle";
Title.style.width=(width-40)+'px'; //自适应标题长度
Title.innerText=title;
Bar.appendChild(Title);
var Change=document.createElement("span");
Change.id="divChange"+ name;
Change.className="divChange";
Change.innerText="-";
Change.ondblclick=this.changeWindow;
Change.onclick=this.changeWindow;
Bar.appendChild(Change);
var Close=document.createElement("span");
Close.id="divClose"+ name;
Close.onclick=function(){
Window.style.display='none';
}
Close.className="divClose";
Close.innerText="×";
Bar.appendChild(Close);
var Content=document.createElement("div");
Content.id="divContent"+ name;
Content.className="divContent"
Content.innerHTML=content;
Content.style.height=parseInt(height-20)+'px';
Window.appendChild(Content);

var ReSize=document.createElement("div");
ReSize.className="divReSize";
ReSize.onmousedown=function(){
if(Window.style.zIndex<=zindex){
zindex++;
Window.style.zIndex=zindex;
}
ReSize.setCapture();
isMouseDown=true;
}
ReSize.onmousemove=function(){
if (isMouseDown && !maximum)
{
width=parseInt(event.clientX)-parseInt(Window.style.left)+5;
height=parseInt(event.clientY)-parseInt(Window.style.top)+5;
if(width>100){ //设置最小宽度
Window.style.width=width+'px';
Title.style.width=(width-40)+'px';
}
if(height>100){ //设置最小高度
Window.style.height=height+'px';
Content.style.height=parseInt(height-20)+'px';
}
}
}
ReSize.onmouseup=function(){
ReSize.releaseCapture();
isMouseDown=false;
}
Window.appendChild(ReSize);
var Iframe=document.createElement("iframe"); //添加iframe,IE6.0下遮挡

希望本文所述对大家的javascript程序设计有所帮助。

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