JS所谓的享元模式-->
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<style>
.tooltip {
width:300px;
height:300px;
background:#f00;
}
</style>
<script>
var TooltipManager = (function(){
var storedInstance = null;
var Tooltip = function(){
this.delayTimeout = null;
this.delay = 1500;
this.element = document.createElement('div');
this.element.style.display = 'none';
this.element.style.position = 'absolute';
this.element.className = 'tooltip';
document.getElementsByTagName('body')[0].appendChild(this.element);
};
Tooltip.prototype = {
startDelay : function(e,text){
if(this.delayTimeout == null){
var that = this;
var x = e.clientX;
var y = e.clientY;
this.delayTimeout = setTimeout(function(){
that.show(x,y,text);
},this.delay)
}
},
show : function(x,y,text){
clearTimeout(this.delayTimeout);
this.delayTimeout = null;
this.element.innerHTML = text;
this.element.style.left = x + 'px';
this.element.style.top = (y+20) + 'px';
this.element.style.display = 'block';
},
hide : function(){
clearTimeout(this.delayTimeout);
this.delayTimeout = null;
this.elements.style.display = 'none';
}
};
return {
addTooltip : function(targetElement,text){
var tt = this.getTooltip();
addEvent(targetElement,'mouseover',function(e){ tt.startDelay(e,text)});
addEvent(targetElement,'mouseout',function(e){ tt.hide()})
},
getTooltip : function(){
if(storedInstance == null){
storedInstance = new Tooltip();
};
return storedInstance;
}
}
}())
</script>
</body>
</html>
直接上代码了
天道酬勤
