Nicer toolbar buttons

App/Utilities/Geometry.swift

@@ -29,4 +29,26 @@ extension CGRect
         
         return rect
     }
+    
+    public func centeredX(inRect: CGRect) -> CGRect {
+        var rect = self
+        rect.origin.x = CGRound((inRect.width - rect.width) / 2.0)
+        
+        return rect
+    }
+    
+    public func centered(inRect: CGRect) -> CGRect {
+        self.centeredX(inRect: inRect).centeredY(inRect: inRect)
+    }
+}
+
+extension CGSize
+{
+    public func extendingBy(dw: CGFloat, dh: CGFloat) -> CGSize {
+        var ourSize = self
+        ourSize.width  += dw
+        ourSize.height += dh
+        
+        return ourSize
+    }
 }