鼠標拖動改變表格大小_層和布局特效

鼠標拖動可改變表格大小，當然也可以移動表格，不知道有什么用，但感覺挺不錯，實際上這里的表格完全可以是一個DIV標記，這樣就好理解，也就是一個層拖動功能。

<html>
<head>
<title>鼠標拖動改變表格大小_mb5u.com</title>
<SCRIPT language=javascript>
var theobject = null; 
function resizeObject() {
	this.el        = null; 
	this.dir    = "";      
	this.grabx = null;     
	this.graby = null;
	this.width = null;
	this.height = null;
	this.left = null;
	this.top = null;
}
	
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; 
	yMin = 8;

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

if (el.className == "resizeMe") {
		str = getDirection(el);
		if (str == "") str = "default";
		else str += "-resize";
		el.style.cursor = str;
	}

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>

<SCRIPT language=javascript>
if (moz) {
	extendElementModel();
	extendEventObject();
	emulateEventHandlers(["mousemove", "mousedown", "mouseup"]);
}
</SCRIPT>
<STYLE>
#simple {
BORDER-RIGHT: white 1px solid; BORDER-TOP: white 1px solid; Z-INDEX: 2; BACKGROUND: white; LEFT: 60px; OVERFLOW: hidden; BORDER-LEFT: white 1px solid; WIDTH: 400px; BORDER-BOTTOM: white 1px solid; POSITION: absolute; TOP: 80px; HEIGHT: 100px
}
</STYLE>
</head>
<body>
<table class=resizeMe id=simple border="1" width="100%" height="100%">
  <tr>
    <td width="9%">可</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
  </tr>
  <tr>
    <td width="9%">以</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
  </tr>
  <tr>
    <td width="9%">拖動</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
    <td width="9%">　</td>
  </tr>
</table>
</body>
</html>

所屬頻道：層和布局特效/更新時間：2012-12-27

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