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Define Rectangle#expand() and #scale(), as an easy way to manipulate rectangles.

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This commit is contained in:
Jürg Lehni 2011-07-04 19:48:18 +02:00
parent 9cf5292496
commit f2d2937a18
1 changed files with 13 additions and 0 deletions
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13
src/basic/Rectangle.js
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@ -608,6 +608,19 @@ var Rectangle = this.Rectangle = Base.extend(/** @lends Rectangle# */{
return Rectangle.create(x1, y1, x2 - x1, y2 - y1);
},
// DOCS: Document #expand and #scale
expand: function(hor, ver) {
if (ver === undefined)
ver = hor;
return Rectangle.create(this.x - hor / 2, this.y - ver / 2,
this.width + hor, this.height + ver);
},
scale: function(hor, ver) {
return this.expand(this.width * hor - this.width,
this.height * (ver === undefined ? hor : ver) - this.height);
},
statics: {
// See Point.create()
create: function(x, y, width, height) {