拖拽改变div的大小
<!DOCTYPE html>
<html> <head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Resize</title>
<style type="text/css">
#rRightDown,
#rLeftDown,
#rLeftUp,
#rRightUp,
#rRight,
#rLeft,
#rUp,
#rDown {
position: absolute;
background: #C00;
width: 6px;
height: 6px;
z-index: 5;
font-size: 0;
} #rRight {
width: 15px
} #rLeftDown,
#rRightUp {
cursor: ne-resize;
} #rRightDown,
#rLeftUp {
cursor: nw-resize;
} #rRight,
#rLeft {
cursor: e-resize;
} #rUp,
#rDown {
cursor: n-resize;
} #rRightDown {
bottom: -3px;
right: -3px;
} #rLeftDown {
bottom: -3px;
left: -3px;
} #rRightUp {
top: -3px;
right: -3px;
} #rLeftUp {
top: -3px;
left: -3px;
} #rRight {
right: -3px;
top: 50%
} #rLeft {
left: -3px;
top: 50%
} #rUp {
top: -3px;
left: 50%
} #rDown {
bottom: -3px;
left: 50%
}
</style>
</head> <body>
<div id='ss' style="height:100px; width:100px; border:1px solid #000000; position:absolute; left:200px; top:200px;">
<div id="rRightDown"> </div>
<div id="rLeftDown"> </div>
<div id="rRightUp"> </div>
<div id="rLeftUp"> </div>
<div id="rRight"> </div>
<div id="rLeft"> </div>
<div id="rUp"> </div>
<div id="rDown"></div>
</div>
<script>
var Sys = (function(ua) {
var s = {};
s.IE = ua.match(/msie ([\d.]+)/) ? true : false;
s.Firefox = ua.match(/firefox\/([\d.]+)/) ? true : false;
s.Chrome = ua.match(/chrome\/([\d.]+)/) ? true : false;
s.IE6 = (s.IE && ([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 6)) ? true : false;
s.IE7 = (s.IE && ([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 7)) ? true : false;
s.IE8 = (s.IE && ([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 8)) ? true : false;
return s;
})(navigator.userAgent.toLowerCase()); /*判断是哪一种浏览器,火狐,谷歌,ie*/
var $ = function(id) {
return document.getElementById(id);
}; /*获取元素,模仿jQuery*/
var Css = function(e, o) { /*更改对象的top,left,width,height来控制对象的大小*/
for(var i in o)
e.style[i] = o[i];
};
var Extend = function(destination, source) { /*拷贝对象的属性*/
for(var property in source) {
destination[property] = source[property];
}
};
/*直接调用方法*/
var Bind = function(object, fun) {
var args = Array.prototype.slice.call(arguments).slice(2);
return function() {
return fun.apply(object, args);
}
};
/*直接调用方法,并将事件的类型传入作为第一个参数*/
var BindAsEventListener = function(object, fun) {
var args = Array.prototype.slice.call(arguments).slice(2);
return function(event) {
return fun.apply(object, [event || window.event].concat(args));
}
};
/*获取当前元素的属性*/
var CurrentStyle = function(element) {
return element.currentStyle || document.defaultView.getComputedStyle(element, null);
};
/*事件监听,执行对应的函数*/
function addListener(element, e, fn) {
element.addEventListener ? element.addEventListener(e, fn, false) : element.attachEvent("on" + e, fn);
};
/*事件的移除*/
function removeListener(element, e, fn) {
element.removeEventListener ? element.removeEventListener(e, fn, false) : element.detachEvent("on" + e, fn)
};
/*创建一个新的可以拖拽的,变换大小的对象*/
var Class = function(properties) {
var _class = function() {
return(arguments[0] !== null && this.initialize && typeof(this.initialize) == 'function') ? this.initialize.apply(this, arguments) : this;
};
_class.prototype = properties;
return _class;
};
var Resize = new Class({
initialize: function(obj) {
this.obj = obj;
this.resizeelm = null;
this.fun = null; //记录触发什么事件的索引
this.original = []; //记录开始状态的数组
this.width = null;
this.height = null;
this.fR = BindAsEventListener(this, this.resize); /*拖拽去更改div的大小*/
this.fS = Bind(this, this.stop); /*停止移除监听的事件*/
},
set: function(elm, direction) {
if(!elm) return;
this.resizeelm = elm;
/*点击事件的监听,调用start函数去初始化数据,监听mousemove和mouseup,这两个事件,当mouseover的时候,去更改div的大小,当mouseup,去清除之前监听的两个事件*/
addListener(this.resizeelm, 'mousedown', BindAsEventListener(this, this.start, this[direction]));
return this;
},
start: function(e, fun) {
this.fun = fun;
this.original = [parseInt(CurrentStyle(this.obj).width), parseInt(CurrentStyle(this.obj).height), parseInt(CurrentStyle(this.obj).left), parseInt(CurrentStyle(this.obj).top)];
console.log({
width: this.original[0],
height: this.original[1],
left: this.original[2],
top: this.original[3]
});
this.width = (this.original[2] || 0) + this.original[0];
this.height = (this.original[3] || 0) + this.original[1];
addListener(document, "mousemove", this.fR);
addListener(document, 'mouseup', this.fS);
},
resize: function(e) {
this.fun(e);
/*失去焦点的时候,调用this.stop去清除监听事件*/
Sys.IE ? (this.resizeelm.onlosecapture = function() {
this.fS();
}) : (this.resizeelm.onblur = function() {
this.fS();
})
},
stop: function() {
removeListener(document, "mousemove", this.fR);
removeListener(document, "mousemove", this.fS);
window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty(); /**清除选中的内容*/
},
up: function(e) {
this.height > e.clientY ? Css(this.obj, {
top: e.clientY + "px",
height: this.height - e.clientY + "px"
}) : this.turnDown(e);
},
down: function(e) {
e.clientY > this.original[3] ? Css(this.obj, {
top: this.original[3] + 'px',
height: e.clientY - this.original[3] + 'px'
}) : this.turnUp(e);
},
left: function(e) {
e.clientX < this.width ? Css(this.obj, {
left: e.clientX + 'px',
width: this.width - e.clientX + "px"
}) : this.turnRight(e);
},
right: function(e) {
e.clientX > this.original[2] ? Css(this.obj, {
left: this.original[2] + 'px',
width: e.clientX - this.original[2] + "px"
}) : this.turnLeft(e);
},
leftUp: function(e) {
this.up(e);
this.left(e);
},
leftDown: function(e) {
this.left(e);
this.down(e);
},
rightUp: function(e) {
this.up(e);
this.right(e);
},
rightDown: function(e) {
this.right(e);
this.down(e);
},
turnDown: function(e) {
Css(this.obj, {
top: this.height + 'px',
height: e.clientY - this.height + 'px'
});
},
turnUp: function(e) {
Css(this.obj, {
top: e.clientY + 'px',
height: this.original[3] - e.clientY + 'px'
});
},
turnRight: function(e) {
Css(this.obj, {
left: this.width + 'px',
width: e.clientX - this.width + 'px'
});
},
turnLeft: function(e) {
Css(this.obj, {
left: e.clientX + 'px',
width: this.original[2] - e.clientX + 'px'
});
}
});
window.onload = function() {
new Resize($('ss')).set($('rUp'), 'up').set($('rDown'), 'down').set($('rLeft'), 'left').set($('rRight'), 'right').set($('rLeftUp'), 'leftUp').set($('rLeftDown'), 'leftDown').set($('rRightDown'), 'rightDown').set($('rRightUp'), 'rightUp');
}
</script>
</body> </html>