UIView+Alignment.m

//
//  UIView+Alignment.m
//  UIView+Alignment
//
//  Created by Dan Hassin on 4/6/10.
//  Copyright 2010 InContext. All rights reserved.
//

#import "UIView+Alignment.h"


@implementation UIView (alignment)

- (void) alignTo:(UIViewAlignment)a margins:(UIEdgeInsets)e
{
	//default is to align to superview
	[self alignTo:a ofRect:self.superview.bounds margins:e];
}

- (void) alignTo:(UIViewAlignment)a
{
	[self alignTo:a margins:UIEdgeInsetsZero];
}

- (void) alignTo:(UIViewAlignment)a ofRect:(CGRect)r margins:(UIEdgeInsets)e
{
	CGRect rect = self.frame;
	
	if (a & UIViewAlignmentCenterHorizontal)
		rect.origin.x = r.origin.x + (r.size.width-rect.size.width)/2.0;
	
	if (a & UIViewAlignmentCenterVertical)
		rect.origin.y = r.origin.y + (r.size.height-rect.size.height)/2.0;
	
	if (a & UIViewAlignmentTop)
		rect.origin.y = r.origin.y;
	
	if (a & UIViewAlignmentBottom)
		rect.origin.y = r.origin.y + r.size.height-self.frame.size.height;
	
	if (a & UIViewAlignmentLeft)
		rect.origin.x = r.origin.x;
	
	if (a & UIViewAlignmentRight)
		rect.origin.x = r.origin.x + r.size.width-self.frame.size.width;
	
	rect.origin.x += e.left;
	rect.origin.x -= e.right;
	
	rect.origin.y += e.top;
	rect.origin.y -= e.bottom;
	
	self.frame = CGRectIntegral(rect);
}

- (void) alignTo:(UIViewAlignment)a ofRect:(CGRect)rect
{
	[self alignTo:a ofRect:rect margins:UIEdgeInsetsZero];	
}


@end