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边框处拖动鼠标改变div大小

2013-10-23 16:15 549 查看

边框处拖动鼠标改变div大小

<html>

<head>

<title>改变层的大小-阿里西西WEB开发</title>

<meta content="text/html; charset=gb2312" http-equiv="Content-Type">

<style> {

box-sizing: border-box; moz-box-sizing: border-box

}

#testDiv     { background-color: buttonface; background-repeat: repeat;

               background-attachment: scroll; color: #3969A5; height: 300px;

               left: 30px; overflow: hidden; width: 500; z-index: 2;

               border: 2px outset white; margin: 0px; padding: 2px;

               background-position: 0% 50% }

body         { font-family: Verdana; font-size: 9pt }

#innerNice   { background-color: white; background-repeat: repeat; background-attachment:

               scroll; color: #3969A5; height: 100%; overflow: auto; width:

               100%; border: 2px inset white; padding: 8px;

               background-position: 0% 50% }

</style>

<SCRIPT language=javascript>

/////////////////////////////////////////////////////////////////////////

// Generic Resize by Erik Arvidsson                                    //

//                                                                     //

// You may use this script as long as this disclaimer is remained.     //

// See www.dtek.chalmers.se/~d96erik/dhtml/ for mor info               //

//                                                                     //

// How to use this script!                                             //

// Link the script in the HEAD and create a container (DIV, preferable //

// absolute positioned) and add the class="resizeMe" to it.            //

/////////////////////////////////////////////////////////////////////////

var theobject = null; //This gets a value as soon as a resize start

function resizeObject() {

this.el        = null; //pointer to the object

this.dir    = "";      //type of current resize (n, s, e, w, ne, nw, se, sw)

this.grabx = null;     //Some useful values

this.graby = null;

this.width = null;

this.height = null;

this.left = null;

this.top = null;

}

//Find out what kind of resize! Return a string inlcluding the directions

function getDirection(el) {

var xPos, yPos, offset, dir;

dir = "";

xPos = window.event.offsetX;

yPos = window.event.offsetY;

offset = 8; //The distance from the edge in pixels

if (yPos<offset) dir += "n";

else if (yPos > el.offsetHeight-offset) dir += "s";

if (xPos<offset) dir += "w";

else if (xPos > el.offsetWidth-offset) dir += "e";

return dir;

}

function doDown() {

var el = getReal(event.srcElement, "className", "resizeMe");

if (el == null) {

   theobject = null;

   return;

}

dir = getDirection(el);

if (dir == "") return;

theobject = new resizeObject();



theobject.el = el;

theobject.dir = dir;

theobject.grabx = window.event.clientX;

theobject.graby = window.event.clientY;

theobject.width = el.offsetWidth;

theobject.height = el.offsetHeight;

theobject.left = el.offsetLeft;

theobject.top = el.offsetTop;

window.event.returnValue = false;

window.event.cancelBubble = true;

}

function doUp() {

if (theobject != null) {

   theobject = null;

}

}

function doMove() {

var el, xPos, yPos, str, xMin, yMin;

xMin = 8; //The smallest width possible

yMin = 8; //             height

el = getReal(event.srcElement, "className", "resizeMe");

if (el.className == "resizeMe") {

   str = getDirection(el);

//Fix the cursor

   if (str == "") str = "default";

   else str += "-resize";

   el.style.cursor = str;

}

//Dragging starts here

if(theobject != null) {

   if (dir.indexOf("e") != -1)

    theobject.el.style.width = Math.max(xMin, theobject.width + window.event.clientX - theobject.grabx) + "px";

   if (dir.indexOf("s") != -1)

    theobject.el.style.height = Math.max(yMin, theobject.height + window.event.clientY - theobject.graby) + "px";

   if (dir.indexOf("w") != -1) {

    theobject.el.style.left = Math.min(theobject.left + window.event.clientX - theobject.grabx, theobject.left + theobject.width - xMin) + "px";

    theobject.el.style.width = Math.max(xMin, theobject.width - window.event.clientX + theobject.grabx) + "px";

   }

   if (dir.indexOf("n") != -1) {

    theobject.el.style.top = Math.min(theobject.top + window.event.clientY - theobject.graby, theobject.top + theobject.height - yMin) + "px";

    theobject.el.style.height = Math.max(yMin, theobject.height - window.event.clientY + theobject.graby) + "px";

   }



   window.event.returnValue = false;

   window.event.cancelBubble = true;

}

}

function getReal(el, type, value) {

temp = el;

while ((temp != null) && (temp.tagName != "BODY")) {

   if (eval("temp." + type) == value) {

    el = temp;

    return el;

   }

   temp = temp.parentElement;

}

return el;

}

document.onmousedown = doDown;

document.onmouseup   = doUp;

document.onmousemove = doMove;

</SCRIPT>

<meta content="Microsoft FrontPage 4.0" name="GENERATOR">

<meta name="ProgId" content="FrontPage.Editor.Document">

</head>

<body>

<div class="resizeMe" id="testDiv">

<div id="innerNice">

    <p align="center">　</p>

    <p align="center">

请在边框处拖动鼠标

    <p>　</p>

    <p>　</p>

    <p>　</p>

</div>

</div>

</body>

</html>

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