gistfile1.m

//
//  MiniToggle.h
//  MiniToggle
//
//  Created by jtrim on 2/12/10.
/*
MiniToggle.h & MiniToggle.m:
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
//

#import <UIKit/UIKit.h>

@class MiniToggle;

@protocol CSMiniToggleDelegate <NSObject>

- (void)miniToggle:(MiniToggle *)miniToggle didToggleToState:(BOOL)state;

@end


@interface MiniToggle : UIButton 
{
	UIImage *bg;
	UIImage *toggleImg;
	
	UIImageView *toggleView;
	
	BOOL isOn;
	
	id<CSMiniToggleDelegate> delegate;
}

@property (nonatomic)			BOOL isOn;
@property (nonatomic, retain)	id<CSMiniToggleDelegate> delegate;

- (void)toggleOff:(BOOL)animated;
- (void)toggleOn:(BOOL)animated;
- (void)toggle;
- (void)touchToggle:(id)sender;

@end

//
//  MiniToggle.m
//  MiniToggle
//
//  Created by jtrim on 2/12/10.
//

#import "MiniToggle.h"

#define OFF_X 36.5f
#define ON_X   8.5f

#define TOGGLE_Y 6.5f

@implementation MiniToggle
@synthesize isOn, delegate;


- (void)dealloc 
{
	[toggleView release];
    [super dealloc];
}

- (id)initWithFrame:(CGRect)frame 
{        
	bg = [UIImage imageNamed:@"mt_background.png"];
	toggleImg = [UIImage imageNamed:@"mt_toggle.png"];

	CGRect newFrame = CGRectMake(frame.origin.x, frame.origin.y, bg.size.width, bg.size.height);
	
    if (self = [super initWithFrame:newFrame]) 
	{
		[self setOpaque:NO];
		[self setBackgroundColor:[UIColor clearColor]];
		isOn = NO;
		
		[self addTarget:self action:@selector(touchToggle:) forControlEvents:UIControlEventTouchUpInside];
    }
	
    return self;
}

-(void) drawRect:(CGRect)rect
{	
	[bg drawInRect:CGRectMake(0, 0, bg.size.width, bg.size.height)];
	toggleView = [[UIImageView alloc] initWithImage:toggleImg];
	
	CGRect toggleFrame = CGRectMake(2, 1, toggleView.frame.size.width, toggleView.frame.size.height);
	
	[toggleView setFrame:toggleFrame];
	
	// set up layers
	CALayer *toggleLayer = [[CALayer alloc] init];
	[toggleLayer addSublayer:[toggleView layer]];
	[[toggleView layer]setPosition:CGPointMake(OFF_X, TOGGLE_Y)];
	
	CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
	CGMutablePathRef path = CGPathCreateMutable();
	
	CGPathAddEllipseInRect(path, nil, CGRectMake(0, 0, 13, 13));
	CGPathAddEllipseInRect(path, nil, CGRectMake(30, 0, 13, 13));
	CGPathAddRect(path, nil, CGRectMake(6, 0, 30, 13));
	
	[maskLayer setPath:path];
	[maskLayer setFillColor:[[UIColor greenColor] CGColor]];
	
	[toggleLayer setMask:maskLayer];
	[maskLayer release];
	
	[toggleLayer setPosition:CGPointMake(2, 2)];
	
	[[self layer] addSublayer:toggleLayer];
	
	if (isOn)
		[self toggleOn:NO];
}

- (void)toggleOn:(BOOL)animated
{
	isOn = YES;
	if (animated)
	{
		[UIView beginAnimations:nil context:nil];
		[UIView setAnimationDuration:.168];
	}
	
	CGPoint newPoint = CGPointMake(ON_X, TOGGLE_Y);
	[[toggleView layer] setPosition:newPoint];
	
	if (animated)
		[UIView commitAnimations];
}

- (void)toggleOff:(BOOL)animated
{
	isOn = NO;
	if (animated)
	{
		[UIView beginAnimations:nil context:nil];
		[UIView setAnimationDuration:.173];
	}
	
	CGPoint newPoint = CGPointMake(OFF_X, TOGGLE_Y);
	[[toggleView layer] setPosition:newPoint];
	
	if (animated)
		[UIView commitAnimations];
}

- (void)toggle
{
	if (isOn)
		[self toggleOff:YES];
	else 
		[self toggleOn:YES];
	
	if ([delegate respondsToSelector:@selector(miniToggle:didToggleToState:)])
		[delegate miniToggle:self didToggleToState:isOn];
}

- (void)touchToggle:(id)sender
{
	[self toggle];
}

@end