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Javascript implements draggable color change and closing layer window instance_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:58:541002browse

The example in this article describes the method of implementing draggable color change and closing the layer window using JavaScript. Share it with everyone for your reference. The specific analysis is as follows:

This is a code that implements layer dragging based on javascript CSS. The difference is that the window will change color when dragging, making the operation experience better. You can run the code to see the effect. It can also show/hide or close the opened effect, think about it when you have nothing to do 

<html>
<head>
<title>拖动窗口</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type='text/css'>
<!--
body{font-size:12px;}
a:visited{text-decoration:none;color:slategray;}
a:hover{text-decoration:underline;color:slategray;}
a:link{text-decoration:none;color:slategray;}
-->
</style>
<script language=JScript>
<!--
var x0=0,y0=0,x1=0,y1=0;
var offx=6,offy=6;
var moveable=false;
var hover='orange',normal='#336699';//color;
var index=10000;//z-index;
//开始拖动;
function startDrag(obj)
{
if(event.button==1)
{
//锁定标题栏;
obj.setCapture();
//定义对象;
var win = obj.parentNode;
var sha = win.nextSibling;
//记录鼠标和层位置;
x0 = event.clientX;
y0 = event.clientY;
x1 = parseInt(win.style.left);
y1 = parseInt(win.style.top);
//记录颜色;
normal = obj.style.backgroundColor;
//改变风格;
obj.style.backgroundColor = hover;
win.style.borderColor = hover;
obj.nextSibling.style.color = hover;
sha.style.left = x1 + offx;
sha.style.top = y1 + offy;
moveable = true;
}
}
//拖动;
function drag(obj)
{
if(moveable)
{
var win = obj.parentNode;
var sha = win.nextSibling;
win.style.left = x1 + event.clientX - x0;
win.style.top = y1 + event.clientY - y0;
sha.style.left = parseInt(win.style.left) + offx;
sha.style.top = parseInt(win.style.top) + offy;
}
}
//停止拖动;
function stopDrag(obj)
{
if(moveable)
{
var win = obj.parentNode;
var sha = win.nextSibling;
var msg = obj.nextSibling;
win.style.borderColor = normal;
obj.style.backgroundColor = normal;
msg.style.color = normal;
sha.style.left = obj.parentNode.style.left;
sha.style.top = obj.parentNode.style.top;
obj.releaseCapture();
moveable = false;
}
}
//获得焦点;
function getFocus(obj)
{
if(obj.style.zIndex!=index)
{
index = index + 2;
var idx = index;
obj.style.zIndex=idx;
obj.nextSibling.style.zIndex=idx-1;
}
}
//最小化;
function min(obj)
{
var win = obj.parentNode.parentNode;
var sha = win.nextSibling;
var tit = obj.parentNode;
var msg = tit.nextSibling;
var flg = msg.style.display=="none";
if(flg)
{
win.style.height = parseInt(msg.style.height) + parseInt(tit.style.height) + 2*2;
sha.style.height = win.style.height;
msg.style.display = "block";
obj.innerHTML = "0";
}
else
{
win.style.height = parseInt(tit.style.height) + 2*2;
sha.style.height = win.style.height;
obj.innerHTML = "2";
msg.style.display = "none";
}
}
//创建一个对象;
function xWin(id,w,h,l,t,tit,msg)
{
index = index+2;
this.id = id;
this.width = w;
this.height = h;
this.left = l;
this.top = t;
this.zIndex = index;
this.title = tit;
this.message = msg;
this.obj = null;
this.bulid = bulid;
this.bulid();
}
//初始化;
function bulid()
{
var str = ""
+ "<div id=xMsg" + this.id + " "
+ "style='"
+ "z-index:" + this.zIndex + ";"
+ "width:" + this.width + ";"
+ "height:" + this.height + ";"
+ "left:" + this.left + ";"
+ "top:" + this.top + ";"
+ "background-color:" + normal + ";"
+ "color:" + normal + ";"
+ "font-size:8pt;"
+ "font-family:Tahoma;"
+ "position:absolute;"
+ "cursor:default;"
+ "border:2px solid " + normal + ";"
+ "' "
+ "onmousedown='getFocus(this)'>"
+ "<div "
+ "style='"
+ "background-color:" + normal + ";"
+ "width:" + (this.width-2*2) + ";"
+ "height:20;"
+ "color:white;"
+ "' "
+ "onmousedown='startDrag(this)' "
+ "onmouseup='stopDrag(this)' "
+ "onmousemove='drag(this)' "
+ "ondblclick='min(this.childNodes[1])'"
+ ">"
+ "<span style='width:" + (this.width-2*12-4) + ";padding-left:3px;'>" + this.title + "</span>"
+ "<span style='width:12;border-width:0px;color:white;font-family:webdings;' onclick='min(this)'>0</span>"
+ "<span style='width:12;border-width:0px;color:white;font-family:webdings;' onclick='ShowHide(\""+this.id+"\",null)'>r</span>"
+ "</div>"
+ "<div style='"
+ "width:100%;"
+ "height:" + (this.height-20-4) + ";"
+ "background-color:white;"
+ "line-height:14px;"
+ "word-break:break-all;"
+ "padding:3px;"
+ "'>" + this.message + "</div>"
+ "</div>"
+ "<div id=xMsg" + this.id + "bg style='"
+ "width:" + this.width + ";"
+ "height:" + this.height + ";"
+ "top:" + this.top + ";"
+ "left:" + this.left + ";"
+ "z-index:" + (this.zIndex-1) + ";"
+ "position:absolute;"
+ "background-color:black;"
+ "filter:alpha(opacity=40);"
+ "'></div>";
document.body.insertAdjacentHTML("beforeEnd",str);
}
//显示隐藏窗口
function ShowHide(id,dis){
var bdisplay = (dis==null)&#63;((document.getElementById("xMsg"+id).style.display=="")&#63;"none":""):dis
document.getElementById("xMsg"+id).style.display = bdisplay;
document.getElementById("xMsg"+id+"bg").style.display = bdisplay;
}
//-->
</script>
<script language='JScript'>
<!--
function initialize()
{
var a = new xWin("1",160,200,200,200,"窗口1","xWin Demo");
var b = new xWin("2",240,200,100,100,"窗口2","Welcome"); 
var c = new xWin("3",200,160,250,50,"窗口3","Copyright");
ShowHide("1","none");//隐藏窗口1
}
window.onload = initialize;
//-->
</script>
</head>
<base target="_blank">
<body onselectstart='return false' oncontextmenu='return false' >
<a onclick="ShowHide('1',null);return false;" href="">Windows 1</a>
<a onclick="ShowHide('2',null);return false;" href="">Windows 2</a>
<a onclick="ShowHide('3',null);return false;" href="">Windows 3</a>
</body>
</html>

I hope this article will be helpful to everyone’s JavaScript programming design.

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