gistfile1.m

- (void)drawRect:(CGRect)rect
{
    
    //Some variables
    CGSize size = self.bounds.size;
    CGContextRef context  =  UIGraphicsGetCurrentContext();
    UIGraphicsPushContext(context);
    CGContextClearRect(context, self.bounds);
    //Snap grid for sharp pixels
    //CGContextTranslateCTM (context, 0.5f,0.5f);
    
    //Draw screen in current context
    [backgroundImage drawInRect:self.bounds];
    
    CGContextSetFillColorWithColor(context, [[UIColor blackColor] CGColor]);
    CGContextSetAlpha(context, 0.5f);
    
    // Finite Freq bar
    [finiteBar stroke];
    //Detail finite bar
    [finiteBar applyTransform:CGAffineTransformMakeTranslation(0, kYRFiniteBarDetailTranslate - 0.5f)];
    [finiteBar setLineWidth:kYRFiniteBarDetailThickness];
    [finiteBar stroke];
    //Move Back intoplace
    [finiteBar applyTransform:CGAffineTransformIdentity];
    
    
    // Frequency bar
    [freqBar stroke];
    //Detail Freq bar
    [freqBar applyTransform:CGAffineTransformMakeTranslation(0, kYRFreqBarDetailTranslate + 0.5f)];
    [freqBar setLineWidth:kYRFreqBarDetailThickness];
    [freqBar stroke];
    
    
    CGFloat finiteWidth = (size.width - (kYRFiniteBarXPadding) - (kYRFramePadding)) - (kYRFramePadding + kYRFiniteBarXPadding);
    
    [largeBlock applyTransform:CGAffineTransformMakeTranslation(0,kYRFiniteBarYPadding + kYRlargeYOffset)];
    
    for (int i = 0; i < 11; i ++) {
        NSString *number = [NSString stringWithFormat:@"%i", i];
        
        CGFloat x = kYRFramePadding + kYRFiniteBarXPadding + (finiteWidth/10.f * i);
        
        x = floorf(x);
        
        CGSize numberSize = [number sizeWithFont:finiteFont];
        
        [number drawAtPoint:CGPointMake(x - (numberSize.width * 0.35f), kYRFiniteBarYTextPadding) withFont:finiteFont];
        
        
        CGContextTranslateCTM(context, (i == 9)?x-kYRlargeBlockWidth:x, 0.f);
        
        //[largeBlock applyTransform:CGAffineTransformMakeTranslation(x,0)];
        [largeBlock stroke];
        
        CGContextTranslateCTM(context, -x, 0);
        
    }
    
    [largeBlock applyTransform:CGAffineTransformMakeTranslation(0,(kYRFiniteBarYPadding + kYRlargeYOffset) * -1.f)];
    
    
    NSString *x = @"106";
    CGSize xs = [x sizeWithFont:[UIFont fontWithName:@"Futura-CondensedMedium" size:8.f]];
    CGFloat freqWidth = (size.width - (kYRFreqBarXTextPadding * 2) - (kYRFramePadding*2.f)) - (xs.width * 0.5f);
    
    [largeBlock applyTransform:CGAffineTransformMakeTranslation(0,kYRFreqBarYPadding - kYRlargeYOffset)];
    
    
    for (int i = 0; i < YRFrequenciesCount; i ++) {
        NSString *number = [NSString stringWithFormat:@"%i", YRFrequencies[i]];
        
        
        CGSize numberSize = [number sizeWithFont:freqFont];
        
        CGFloat x = kYRFramePadding + kYRFreqBarXTextPadding + (freqWidth * (((float)YRFrequencies[i] - YRFrequencies[0])/(float)YRFreqSpread));
        
        x = floorf(x);
        
        [number drawAtPoint:CGPointMake((x - (numberSize.width * 0.35f)), kYRFreqBarYTextPadding) withFont:freqFont];
        
        CGContextTranslateCTM(context, x, 0);
        
        //[largeBlock applyTransform:CGAffineTransformMakeTranslation(x,0)];
        [largeBlock stroke];
        
        CGContextTranslateCTM(context, -x, 0);
        
        
    }
    
    [largeBlock applyTransform:CGAffineTransformMakeTranslation(0,(kYRFreqBarYPadding - kYRlargeYOffset) * -1.f)];
    
    CGContextSetAlpha(context, 1.f);
    
    CGContextSetFillColorWithColor(context, [[UIColor colorWithRed:0.7f green:0 blue:0 alpha:1.f] CGColor]);
    
    CGRect overlayRect = self.bounds;
    overlayRect.size.width -= 3.f;
    overlayRect.size.height -= 2.f;
    overlayRect.origin.x += 3.5f;
    overlayRect.origin.y += 1.f;
    
    [overlayImage drawInRect:overlayRect];
    
    [finiteNeedle applyTransform:CGAffineTransformMakeTranslation(finiteNeedleX, kYRFramePadding-0.5f)];
    [finiteNeedle stroke];
    [finiteNeedle fill];
    [finiteNeedle applyTransform:CGAffineTransformMakeTranslation(-1.f * finiteNeedleX,-1.f * kYRFramePadding-0.5f)];
    
    
    [freqNeedle applyTransform:CGAffineTransformMakeTranslation(freqNeedleX,size.height - (kYRFramePadding-0.5f))];
    [freqNeedle stroke];
    [freqNeedle fill];
    [freqNeedle applyTransform:CGAffineTransformMakeTranslation(-1.f * freqNeedleX,-1.f * size.height - (kYRFramePadding-0.5f))];
    
    // Render a glossy gradient on top!
    CGGradientRef glossGradient;
    CGColorSpaceRef rgbColorSpace;
    size_t num_locations = 2;
    CGFloat locations[2] = {
        0.25, 1.0
    };
    CGFloat components[8] = {
        1.0, 1.0, 1.0, 0.00f, // Start color
        1.0, 1.0, 1.0, 0.50f // End color
    };
    rgbColorSpace = CGColorSpaceCreateDeviceRGB();
    glossGradient = CGGradientCreateWithColorComponents(rgbColorSpace, components, locations, num_locations);
    
    CGPoint topCenter = CGPointMake(finiteNeedleX, 0.0);
    CGPoint topQuarterBoundary = CGPointMake(finiteNeedleX+2.f,0.0);
    
    //CGContextSetBlendMode(context, kCGBlendModeOverlay);
    
    
    CGContextAddPath(context, [finiteNeedle CGPath]);
    CGContextAddPath(context, [freqNeedle CGPath]);
    CGContextClip(context);
    
    CGContextDrawLinearGradient(context, glossGradient, topCenter, topQuarterBoundary, 0);
    
    
    
    CGPoint topCenter2 = CGPointMake(freqNeedleX, 0.0);
    CGPoint topQuarterBoundary2 = CGPointMake(freqNeedleX+2.f,0.0);
    CGContextDrawLinearGradient(context, glossGradient, topCenter2, topQuarterBoundary2, 0);
    
    
    
    //   CGContextSetBlendMode(context, kCGBlendModeNormal);
    CGContextClipToRect(context, rect);
    
    CGGradientRelease(glossGradient);
    
    UIGraphicsPopContext();
    
}