advanced manual 9 patching

RedButton.h

//
//  RedButton.h
//  SkidtApp
//
//  Created by Hans Duedal on 2/8/12.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface RedButton : UIButton

@property (strong, nonatomic) UIImage *icon;

@end

RedButton.m

//
//  RedButton.m
//  SkidtApp
//
//  Created by Hans Duedal on 2/8/12.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import "RedButton.h"

@implementation RedButton

/*
 * Set up some constants
 */
static int leftCapWidth = 48;
static int rightCapWidth = 40;
static int topHeight = 11;
static int bottomHeight = 11;
// top/bottom repeat section
static int imageTopHeight = 23;
static int imageBottomHeight = 23;
static int imageSampleSize = 1;
// icon
static int iconIndent = 10;
static int iconSize = 32;
// title
static int titleTopMargin = -2;
static int titleLeftMargin = 5;

@synthesize icon;

-(void) awakeFromNib {
	[self setBackgroundImage:nil forState:UIControlStateNormal];
	UILabel *title = [self titleLabel];
	[title setFont:[UIFont fontWithName:@"Dispatch Bold" size:[[title font] pointSize]]];
	
	// Quickly remove icon to prevent "flash of unstyled content"
	icon = [self imageForState:UIControlStateNormal];
	[self setImage:nil forState:UIControlStateNormal];
	
	// Title
	[self setTitleEdgeInsets:UIEdgeInsetsMake(topHeight+titleTopMargin, leftCapWidth+titleLeftMargin, bottomHeight, rightCapWidth)];
}


/*
 * Override drawRect to draw a scalable version of the button.
 * Since this button requires multiple scalable areas it can't use the built-in features and must be drawn with Quartz 2D
 * The drawing works by samling 15 different images, 5 for each of the 3 scalable areas of the button, which is then drawn.
 */
-(void) drawRect:(CGRect)rect {
	
	CGContextRef context = UIGraphicsGetCurrentContext();
	CGRect bounds = [self bounds];
	
	CGImageRef background = [[UIImage imageNamed:@"button.png"] CGImage];
	
	// center section
	int centerHeight = CGImageGetHeight(background)-imageTopHeight-imageBottomHeight-imageSampleSize-imageSampleSize;
	
	// common calculations
	int imageLowerY = CGImageGetHeight(background)-imageBottomHeight;
	int imageRightX = CGImageGetWidth(background)-rightCapWidth*2;
	
	/*
	 * Image sampling from source image
	 * Assume retina image so *2 coordinates
	 */
	
	// Stretch area
	CGImageRef topPart = CGImageCreateWithImageInRect(background, CGRectMake(leftCapWidth*2, 0, imageSampleSize, imageTopHeight));
	CGImageRef bottomPart = CGImageCreateWithImageInRect(background, CGRectMake(leftCapWidth*2, imageLowerY, imageSampleSize, imageBottomHeight));
	CGImageRef upperstretch = CGImageCreateWithImageInRect(background, CGRectMake(leftCapWidth*2, imageTopHeight, imageSampleSize, imageSampleSize));
	CGImageRef lowerstretch = CGImageCreateWithImageInRect(background, CGRectMake(leftCapWidth*2, imageLowerY-imageSampleSize, imageSampleSize, imageSampleSize));
	CGImageRef centerPart = CGImageCreateWithImageInRect(background, CGRectMake(leftCapWidth*2, imageTopHeight, imageSampleSize, centerHeight));
	
	// Right endcap
	CGImageRef rightTop = CGImageCreateWithImageInRect(background, CGRectMake(imageRightX, 0, rightCapWidth*2, imageTopHeight));
	CGImageRef rightBottom = CGImageCreateWithImageInRect(background, CGRectMake(imageRightX, imageLowerY, rightCapWidth*2, imageBottomHeight));
	CGImageRef rightUpper = CGImageCreateWithImageInRect(background, CGRectMake(imageRightX, imageTopHeight, rightCapWidth*2, imageSampleSize));
	CGImageRef rightLower = CGImageCreateWithImageInRect(background, CGRectMake(imageRightX, imageLowerY, rightCapWidth*2, imageSampleSize));
	CGImageRef rightCenter = CGImageCreateWithImageInRect(background, CGRectMake(imageRightX, imageTopHeight, rightCapWidth*2, centerHeight));
	
	// Left endcap
	CGImageRef leftTop = CGImageCreateWithImageInRect(background, CGRectMake(0, 0, leftCapWidth*2, imageTopHeight));
	CGImageRef leftBottom = CGImageCreateWithImageInRect(background, CGRectMake(0, imageLowerY, leftCapWidth*2, imageBottomHeight));
	CGImageRef leftUpper = CGImageCreateWithImageInRect(background, CGRectMake(0, imageTopHeight, leftCapWidth*2, imageSampleSize));
	CGImageRef leftLower = CGImageCreateWithImageInRect(background, CGRectMake(0, imageLowerY, leftCapWidth*2, imageSampleSize));
	CGImageRef leftCenter = CGImageCreateWithImageInRect(background, CGRectMake(0, imageTopHeight, leftCapWidth*2, centerHeight));
	
	/*
	 * Drawing
	 */
	
	// Fix flipped-y of Quartz 2D lib
	CGContextSaveGState(context);
	CGContextTranslateCTM(context, 0, CGRectGetHeight(bounds));
	CGContextScaleCTM(context, 1.0, -1.0);
	
	// Stretch area
	CGRect stretchBounds = CGRectMake(leftCapWidth, 0, CGRectGetWidth(bounds)-leftCapWidth-rightCapWidth, CGRectGetHeight(bounds));
	CGFloat center = CGRectGetMidY(bounds);
	CGFloat minX = CGRectGetMinX(stretchBounds);
	CGContextDrawImage(context, CGRectMake(minX, CGRectGetHeight(bounds)-topHeight, CGRectGetWidth(stretchBounds), topHeight), topPart);
	CGContextDrawImage(context, CGRectMake(minX, 0, CGRectGetWidth(stretchBounds), bottomHeight), bottomPart);
	CGContextDrawImage(context, CGRectMake(minX, center, CGRectGetWidth(stretchBounds), CGRectGetHeight(bounds)-topHeight-center), upperstretch);
	CGContextDrawImage(context, CGRectMake(minX, bottomHeight, CGRectGetWidth(stretchBounds), center-bottomHeight), lowerstretch);
	CGContextDrawImage(context, CGRectMake(minX, center-centerHeight/4, CGRectGetWidth(stretchBounds), centerHeight/2), centerPart);
	
	// Right endcap
	CGFloat maxX = CGRectGetMaxX(stretchBounds);
	CGContextDrawImage(context, CGRectMake(maxX, CGRectGetHeight(bounds)-topHeight, rightCapWidth, topHeight), rightTop);
	CGContextDrawImage(context, CGRectMake(maxX, 0, rightCapWidth, bottomHeight), rightBottom);
	CGContextDrawImage(context, CGRectMake(maxX, center, rightCapWidth, CGRectGetHeight(bounds)-topHeight-center), rightUpper);
	CGContextDrawImage(context, CGRectMake(maxX, bottomHeight, rightCapWidth, center-bottomHeight), rightLower);
	CGContextDrawImage(context, CGRectMake(maxX, center-centerHeight/4, rightCapWidth, centerHeight/2), rightCenter);
	
	// Left endcap
	CGContextDrawImage(context, CGRectMake(0, CGRectGetHeight(bounds)-topHeight, leftCapWidth, topHeight), leftTop);
	CGContextDrawImage(context, CGRectMake(0, 0, leftCapWidth, bottomHeight), leftBottom);
	CGContextDrawImage(context, CGRectMake(0, center, leftCapWidth, CGRectGetHeight(bounds)-topHeight-center), leftUpper);
	CGContextDrawImage(context, CGRectMake(0, bottomHeight, leftCapWidth, center-bottomHeight), leftLower);
	CGContextDrawImage(context, CGRectMake(0, center-centerHeight/4, leftCapWidth, centerHeight/2), leftCenter);
	
	// Restore state
	CGContextRestoreGState(context);
	
	/*
	 * Image disposal
	 */
	
	// Stretch area
	CGImageRelease(topPart);
	CGImageRelease(bottomPart);
	CGImageRelease(upperstretch);
	CGImageRelease(lowerstretch);
	CGImageRelease(centerPart);
	
	// Right endcap
	CGImageRelease(rightTop);
	CGImageRelease(rightBottom);
	CGImageRelease(rightUpper);
	CGImageRelease(rightLower);
	CGImageRelease(rightCenter);
	
	// Left endcap
	CGImageRelease(leftTop);
	CGImageRelease(leftBottom);
	CGImageRelease(leftUpper);
	CGImageRelease(leftLower);
	CGImageRelease(leftCenter);

	// Icon
	[self.icon drawInRect:CGRectMake(iconIndent, center-iconSize/2, iconSize, iconSize)];
}

@end