Roo.lib.Region = function(t, r, b, l) {
this.top = t;
this[1] = t;
this.right = r;
this.bottom = b;
this.left = l;
this[0] = l;
};
Roo.lib.Region.prototype = {
contains : function(region) {
return ( region.left >= this.left &&
region.right <= this.right &&
region.top >= this.top &&
region.bottom <= this.bottom );
},
getArea : function() {
return ( (this.bottom - this.top) * (this.right - this.left) );
},
intersect : function(region) {
var t = Math.max(this.top, region.top);
var r = Math.min(this.right, region.right);
var b = Math.min(this.bottom, region.bottom);
var l = Math.max(this.left, region.left);
if (b >= t && r >= l) {
return new Roo.lib.Region(t, r, b, l);
} else {
return null;
}
},
union : function(region) {
var t = Math.min(this.top, region.top);
var r = Math.max(this.right, region.right);
var b = Math.max(this.bottom, region.bottom);
var l = Math.min(this.left, region.left);
return new Roo.lib.Region(t, r, b, l);
},
adjust : function(t, l, b, r) {
this.top += t;
this.left += l;
this.right += r;
this.bottom += b;
return this;
}
};
Roo.lib.Region.getRegion = function(el) {
var p = Roo.lib.Dom.getXY(el);
var t = p[1];
var r = p[0] + el.offsetWidth;
var b = p[1] + el.offsetHeight;
var l = p[0];
return new Roo.lib.Region(t, r, b, l);
};