web前端|js教程
js,div拖动
web前端-js教程
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#rRightDown,#rLeftDown,#rLeftUp,#rRightUp,#rRight,#rLeft,#rUp,#rDown{
position:absolute;background:#C00;width:6px;height:6px;z-index:5;font-size:0;}
#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%}
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());
var $ = function (id) {
return document.getElementById(id);
};
var Css = function(e,o){
for(var i in o)
e.style[i] = o[i];
};
var Extend = function(destination, source) {
for (var property in source) {
destination[property] = source[property];
}
};
var Bind = function(object, fun) {
var args = Array.prototype.slice.call(arguments).slice(2);
return function() {
return fun.apply(object, args);
}
};
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));
}
};
var CurrentStyle = function(element){
return element.currentStyle || document.defaultView.getComputedStyle(element, null);
};
function addListener(element,e,fn){
element.addEventListener?element.addEventListener(e,fn,false):element.attachEvent(“on” + e,fn);
};
function removeListener(element,e,fn){
element.removeEventListener?element.removeEventListener(e,fn,false):element.detachEvent(“on” + e,fn)
};
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);
this.fS = Bind(this,this.stop);
},
set : function(elm,direction){
if(!elm)return;
this.resizeelm = elm;
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)];
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);
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();
},
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’);
}
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