javascript實現(xiàn)淡藍色的鼠標拖動選擇框?qū)嵗?/h1>
更新時間:2015年05月09日 09:14:27 作者:休閑生活文化
這篇文章主要介紹了javascript實現(xiàn)淡藍色的鼠標拖動選擇框,可實現(xiàn)鼠標拖動出現(xiàn)淡藍色選擇框的效果,涉及javascript鼠標事件及樣式的操作技巧,需要的朋友可以參考下
本文實例講述了javascript實現(xiàn)淡藍色的鼠標拖動選擇框。分享給大家供大家參考。具體實現(xiàn)方法如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
#rectBox
{
background:#CCFFFF;
border:2px solid #0099FF;
filter:alpha(opacity=30);
opacity:0.3;
position:absolute;
}
</style>
<head>
<title>一個鼠標選擇框</title>
<script type="text/javascript">
function Rect()
{
this.doc = document.documentElement;
if(!this.doc) return;
this.startX = '';
this.startY = '';
this.rect = null;
rectSelf = this;
}
Rect.prototype.down = function(e)
{
var e = e?e:window.event;
rectSelf.startX = e.clientX?e.clientX + document.body.scrollLeft:e.pageX;
rectSelf.startY = e.clientY?e.clientY + document.body.scrollTop:e.pageY;
rectSelf.showRect(true);
}
Rect.prototype.up = function(e)
{
rectSelf.rectBox.style.width = '0px';
rectSelf.rectBox.style.height = '0px';
rectSelf.showRect(false);
}
Rect.prototype.move = function(e)
{
if(rectSelf.rectBox)
{
var currentX = e.clientX?e.clientX + rectSelf.doc.scrollLeft:e.pageX;
var currentY = e.clientY?e.clientY + rectSelf.doc.scrollTop:e.pageY;
rectSelf.rectBox.style.width = Math.abs(currentX - rectSelf.startX) + 'px';
rectSelf.rectBox.style.height = Math.abs(currentY - rectSelf.startY) + 'px';
if(currentX - rectSelf.startX < 0)
{
rectSelf.rectBox.style.left = currentX + 'px';
}
if(currentY - rectSelf.startY < 0)
{
rectSelf.rectBox.style.top = currentY + 'px';
}
//document.title = "left:"+currentX + 'px '+"top:"+currentY + 'px ';
}
}
Rect.prototype.showRect = function(bool)
{
if(bool)
{
if(!this.rectBox)
{
this.rectBox = document.createElement("div");
this.rectBox.id = "rectBox";
document.body.appendChild(this.rectBox);
}
this.rectBox.style.display = "block";
this.rectBox.style.left = this.startX + 'px';
this.rectBox.style.top = this.startY + 'px';
this.addEventListener(this.doc , 'mousemove' , this.move);
}
else
{
if(this.rectBox)
{
this.rectBox.style.display = "none";
}
this.removeEventListener(this.doc , 'mousemove' , this.move);
}
}
Rect.prototype.addEventListener = function(o,e,l)
{
if (o.addEventListener) {
o.addEventListener(e,l,false);
} else if (o.attachEvent) {
o.attachEvent('on'+e,function() {
l(window.event);
});
}
}
Rect.prototype.removeEventListener = function(o,e,l)
{
if (o.removeEventListener) {
o.removeEventListener(e,l,false);
} else if (o.detachEvent) {
o.detachEvent('on'+e,function() {
l(window.event);
});
}
}
window.onload = function()
{
var oRect = new Rect();
oRect.addEventListener(oRect.doc , 'mousedown' , oRect.down);
oRect.addEventListener(oRect.doc , 'mouseup' , oRect.up);
}
</script>
</head>
<body>
<h1>拖動你的鼠標就會出現(xiàn)選擇框</h1>
</body>
</html>
希望本文所述對大家的javascript程序設計有所幫助。
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本文實例講述了javascript實現(xiàn)淡藍色的鼠標拖動選擇框。分享給大家供大家參考。具體實現(xiàn)方法如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <style type="text/css"> #rectBox { background:#CCFFFF; border:2px solid #0099FF; filter:alpha(opacity=30); opacity:0.3; position:absolute; } </style> <head> <title>一個鼠標選擇框</title> <script type="text/javascript"> function Rect() { this.doc = document.documentElement; if(!this.doc) return; this.startX = ''; this.startY = ''; this.rect = null; rectSelf = this; } Rect.prototype.down = function(e) { var e = e?e:window.event; rectSelf.startX = e.clientX?e.clientX + document.body.scrollLeft:e.pageX; rectSelf.startY = e.clientY?e.clientY + document.body.scrollTop:e.pageY; rectSelf.showRect(true); } Rect.prototype.up = function(e) { rectSelf.rectBox.style.width = '0px'; rectSelf.rectBox.style.height = '0px'; rectSelf.showRect(false); } Rect.prototype.move = function(e) { if(rectSelf.rectBox) { var currentX = e.clientX?e.clientX + rectSelf.doc.scrollLeft:e.pageX; var currentY = e.clientY?e.clientY + rectSelf.doc.scrollTop:e.pageY; rectSelf.rectBox.style.width = Math.abs(currentX - rectSelf.startX) + 'px'; rectSelf.rectBox.style.height = Math.abs(currentY - rectSelf.startY) + 'px'; if(currentX - rectSelf.startX < 0) { rectSelf.rectBox.style.left = currentX + 'px'; } if(currentY - rectSelf.startY < 0) { rectSelf.rectBox.style.top = currentY + 'px'; } //document.title = "left:"+currentX + 'px '+"top:"+currentY + 'px '; } } Rect.prototype.showRect = function(bool) { if(bool) { if(!this.rectBox) { this.rectBox = document.createElement("div"); this.rectBox.id = "rectBox"; document.body.appendChild(this.rectBox); } this.rectBox.style.display = "block"; this.rectBox.style.left = this.startX + 'px'; this.rectBox.style.top = this.startY + 'px'; this.addEventListener(this.doc , 'mousemove' , this.move); } else { if(this.rectBox) { this.rectBox.style.display = "none"; } this.removeEventListener(this.doc , 'mousemove' , this.move); } } Rect.prototype.addEventListener = function(o,e,l) { if (o.addEventListener) { o.addEventListener(e,l,false); } else if (o.attachEvent) { o.attachEvent('on'+e,function() { l(window.event); }); } } Rect.prototype.removeEventListener = function(o,e,l) { if (o.removeEventListener) { o.removeEventListener(e,l,false); } else if (o.detachEvent) { o.detachEvent('on'+e,function() { l(window.event); }); } } window.onload = function() { var oRect = new Rect(); oRect.addEventListener(oRect.doc , 'mousedown' , oRect.down); oRect.addEventListener(oRect.doc , 'mouseup' , oRect.up); } </script> </head> <body> <h1>拖動你的鼠標就會出現(xiàn)選擇框</h1> </body> </html>
希望本文所述對大家的javascript程序設計有所幫助。
相關(guān)文章
Web前端框架bootstrap實戰(zhàn)【第一次接觸使用】
Bootstrap是Twitter推出的一個開源的前端框架。這篇文章主要介紹了Web前端框架bootstrap實戰(zhàn),需要的朋友可以參考下2016-12-12