主要功能：
1.拖动
2.可配置相对位置
3.平滑移动
CE.Tween = {
plcMove : function(o, a, s, e, callback, speed){
var sTime = +new Date(), p, speed = speed || 100;
var iTimer = setInterval(function(){
p = (+new Date() - sTime) / speed;
if(p >= 1){
o.style[a] = e + "px";
callback && callback.call(o);
o = null;
return clearInterval(iTimer);
}
o.style[a] = s + (e - s) * ((-Math.cos(p * Math.PI) / 2) + 0.5) + "px";
}, 10);
}
};
CE.Util.Drag = {
dcount : 0,
dList : {},
bind : function(c,obj){
var _this = CE.Util.Drag;
var _d = obj.d || c;
if(!_d){return;}
if(!_d.did){
_d.did = _this.dcount++;
_this.dList[_d.did] = _d;
var _x ,_y,_isdown = false,_scape = null,_p = null;
_d.style.cursor = "move";
var down = function(e){
_isdown = true;
_p = obj.refer || document.body;
_x = e.clientX - _d.offsetLeft; //初始坐标
_y = e.clientY - _d.offsetTop;
if(null == _scape){
_scape = document.createElement("div");
_p.appendChild(_scape);
}
_scape.style.border = "1px dotted #06459c";
_scape.style.position = "absolute";
_scape.style.zIndex = c.style.zIndex + 1 || 1;
_scape.style.width = c.style.width;
_scape.style.height = c.style.height;
_scape.style.left = c.offsetLeft + "px";
_scape.style.top = c.offsetTop + "px";
c.style.filter = "Alpha(Opacity=60)";
c.style.opacity = 0.6;
if(_scape){
CE.Event.addListener(document,"mousemove",move);
CE.Event.addListener(document,"mouseup",up);
document.onselectstart = function() {return false};
if(window.getSelection){ //非ie
window.getSelection().removeAllRanges();
}
}
};
var move = function(e){
if(!_isdown){return};
_scape.style.left = e.clientX - _x + "px";
_scape.style.top = e.clientY - _y + "px";
};
var up = function(){
_isdown = false;
if(_scape){
if(obj.tween){
CE.Tween.plcMove(c,"top",parseInt(c.style.top, 10),_scape.offsetTop);
CE.Tween.plcMove(c,"left",parseInt(c.style.left, 10),_scape.offsetLeft);
}else{
c.style.left = _scape.offsetLeft + "px";
c.style.top = _scape.offsetTop + "px";
}
c.style.filter = "Alpha(Opacity=100)";
c.style.opacity = 1;
_scape.style.zIndex = c.zIndex - 1 || -1;
_p.removeChild(_scape);
_p = null;
_scape = null;
document.onselectstart = function() {return true};
}
};
CE.Event.addListener(_d,"mousedown",down);
}else{
for(var item in _this.dList){
if(_d.did === item.did){
return;
}
}
}
}
};
posted on 2010-01-17 12:16
jacklau 阅读(185)
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