//
//  UIButton+NavButton.m
//
//  Created by Michael Heyeck on 11/9/09.
//  Copyright 2009 Fair Oaks Labs, Inc.
//

#import "UIButton+NavButton.h"


@implementation UIButton (NavButton)

- (UIButton*)configureForBackButtonWithTitle:(NSString*)title target:(id)target action:(SEL)action
{
	// Experimentally determined
	CGFloat padTRL[3] = {6, 8, 12};

	// Text must be put in its own UIView, s.t. it can be positioned to mimic system buttons
	UILabel* label = [[UILabel alloc] init];
	label.backgroundColor = [UIColor clearColor];
	label.font = [UIFont boldSystemFontOfSize:12];
	label.textColor = [UIColor whiteColor];
	label.shadowColor = [UIColor darkGrayColor];
	label.shadowOffset = CGSizeMake(0, -1);
	label.text = title;
	[label sizeToFit];

	// The underlying art files must be added to the project
	UIImage* norm = [[UIImage imageNamed:@"back_norm.png"] stretchableImageWithLeftCapWidth:13 topCapHeight:0];
	UIImage* click = [[UIImage imageNamed:@"back_click.png"] stretchableImageWithLeftCapWidth:13 topCapHeight:0];
	[self setBackgroundImage:norm forState:UIControlStateNormal];
	[self setBackgroundImage:click forState:UIControlStateHighlighted];
	[self addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

	// Calculate dimensions
	CGSize labelSize = label.frame.size;
	CGFloat controlWidth = labelSize.width+padTRL[1]+padTRL[2];
	controlWidth = controlWidth>=norm.size.width?controlWidth:norm.size.width;

	// Assemble and size the views
	self.frame = CGRectMake(0, 0, controlWidth, 30);
	[self addSubview:label];
	label.frame = CGRectMake(padTRL[2], padTRL[0], labelSize.width, labelSize.height);

	// Clean up
	[label release];
	return self;
}

@end