/*

    File: ControlView.m

Abstract: ControlView is a UIView subclass responsible for displaying and hidding controls.

 Version: 1.6

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*/

#import "ControlView.h"

const float gBarHeight = 30.0f;

@implementation ControlView

@synthesize contentHeight = _contentHeight;

@synthesize open = _isOpen;

- (id)initWithFrame:(CGRect)frame

{

    if (self = [super initWithFrame:frame])

    {

        _isOpen = FALSE;

        _contentHeight = frame.size.height - gBarHeight;

        // Gradient setup for bar

        CGFloat barColors[8] = {

            0.30f, 0.30f, 0.30f, 0.75f,

            0.00f, 0.00f, 0.00f, 0.75f

        };

        CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

        if (colorSpace != NULL)

        {

            _barGradient = CGGradientCreateWithColorComponents(colorSpace, barColors, NULL, 2);

            if (_barGradient == NULL)

                NSLog(@"Failed to create CGGradient");

            CGColorSpaceRelease(colorSpace);

        }

        _barStartPoint = CGPointMake(0.0f, 0.0f);

        _barEndPoint = CGPointMake(0.0f, gBarHeight);

        // Image setup for bar

        UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Triangle" ofType:@"png"]];

        if (image == nil)

            NSLog(@"Failed to load image for control vieww");

        _barImageView = [[[UIImageView alloc] initWithImage:image] autorelease];

        CGRect imageViewFrame = _barImageView.frame;

        imageViewFrame.origin.x = floorf((frame.size.width/2.0f) - (imageViewFrame.size.width/2.0f));

        imageViewFrame.origin.y = floorf((gBarHeight/2.0f) - (imageViewFrame.size.height/2.0f));

        [_barImageView setFrame:imageViewFrame];

        [self addSubview:_barImageView];

        _barImageViewRotation = CGAffineTransformMake(cos(-M_PI), sin(-M_PI), -sin(-M_PI), cos(-M_PI), 0.0f, 0.0f);

        self.opaque = FALSE;

    }

    return self;

}

+ (CGFloat)barHeight

{

    return gBarHeight;

}

- (void)drawRect:(CGRect)rect

{

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSaveGState(context);

    CGContextDrawLinearGradient(context, _barGradient, _barStartPoint, _barEndPoint, kCGGradientDrawsAfterEndLocation);

    CGContextSetRGBFillColor(context, 0.25f, 0.25f, 0.25f, 1.0f);

    UIRectFill(CGRectMake(0.0f, 0.0f, self.frame.size.width, 1.0f));

    CGContextRestoreGState(context);

}

- (void)dealloc

{

    CGGradientRelease(_barGradient);

    [super dealloc];

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    UITouch *touch;

    CGPoint point;

    if ([touches count] > 0)

    {

        touch = [[touches allObjects] objectAtIndex:0];

        point = [touch locationInView:self];

        if (point.y <= gBarHeight)

        {

            [UIView beginAnimations:nil context:NULL];

            [UIView setAnimationDuration:0.25f];

            CGRect frame = [self frame];

            if (_isOpen == FALSE)

            {

                frame.origin.y -= _contentHeight;

                [_barImageView setTransform:_barImageViewRotation];

                _isOpen = TRUE;

            }

            else

            {

                frame.origin.y += _contentHeight;

                [_barImageView setTransform:CGAffineTransformIdentity];

                _isOpen = FALSE;

            }

            [self setFrame:frame];

            [UIView commitAnimations];

        }

    }

}

@end