JOBadgeView.m

//
//  JOBadgeView.m
//  JOKit
//
//  Created by Jeffrey Oloresisimo on 11-07-27.
//  Copyright (c) 2011 Jeffrey Oloresisimo. All rights reserved.
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy of
//  this software and associated documentation files (the "Software"), to deal in
//  the Software without restriction, including without limitation the rights to
//  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
//  of the Software, and to permit persons to whom the Software is furnished to do
//  so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//  SOFTWARE.


#import "JOBadgeView.h"


#define	PADDING     14

@interface JOBadgeView (PRIVATE)

- (void)initialize;
- (void)autoPositionFromSuperView;

@end

@implementation JOBadgeView

@synthesize fillColor = _fillColor;
@synthesize borderColor = _borderColor;
@synthesize showBorder = _showBorder;
@synthesize showGloss = _showGloss;
@synthesize showShadow = _showShadow;
@synthesize autoPositioning = _autoPositioning;

- (id)init {
    self = [super init];
    if (self) {
        [self initialize];
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self initialize];
    }
    return self;
}

- (void)setFont:(UIFont*)font {
	[super setFont:font];
	
	[self setBadgeNeedsDisplay];
}

- (void)setText:(NSString*)text {
	[super setText:text];
	
	[self setBadgeNeedsDisplay];
}

- (void)setFillColor:(UIColor *)fillColor {
	if (_fillColor != fillColor) {
		[_fillColor release];
		_fillColor = [fillColor copy];
	}
    
    [self setBadgeNeedsDisplay];
}

- (void)setBorderColor:(UIColor *)borderColor {
	if (_borderColor != borderColor) {
		[_borderColor release];
		_borderColor = [borderColor copy];
	}
    
    [self setBadgeNeedsDisplay];
}

- (void)setShowShadow:(BOOL)shadow {
	_showShadow = shadow;

	[self setBadgeNeedsDisplay];
}

- (void)setBadgeNeedsDisplay {
	CGSize size = [self.text sizeWithFont:self.font];
    CGFloat radius = ceil((size.height)/2.0);
    CGFloat adjustment = ceil(size.width-radius) > 0 ? ceil(size.width-radius) : 0;
    self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, (2*radius)+adjustment+PADDING, size.height+PADDING);
	self.hidden = [self.text length] == 0;
	
	self.layer.shadowOpacity = 0.5;
	self.layer.masksToBounds = NO;
	self.layer.shadowOffset = _showShadow ? CGSizeMake(0,floor(size.height/10)) : CGSizeMake(0,0);
	
	[self setNeedsDisplay];
}

#pragma mark - PRIVATE
- (void)initialize {
    self.font = [UIFont boldSystemFontOfSize:14];
    self.textColor = [UIColor whiteColor];
    self.backgroundColor = [UIColor clearColor];
    self.textAlignment = UITextAlignmentCenter;
    self.baselineAdjustment = UIBaselineAdjustmentAlignCenters;
    self.fillColor = [UIColor redColor];
    self.borderColor = [UIColor whiteColor];
    self.showBorder = YES;
    self.showGloss = YES;
    self.showShadow = YES;
    self.autoPositioning = YES;
}

- (void)autoPositionFromSuperView {
	CGSize size = [self superview].bounds.size;
	self.frame = CGRectMake(size.width-self.bounds.size.width, self.bounds.origin.y, self.bounds.size.width, self.bounds.size.height);
}

// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code.
	CGContextRef context = UIGraphicsGetCurrentContext();
	CGContextSaveGState(context);
	
    CGFloat radius = ceilf((self.bounds.size.height/2.0)-6);
	CGFloat minx = ceilf(CGRectGetMinX(self.bounds)+6), midx = ceilf(CGRectGetMidX(self.bounds)), maxx = ceilf(CGRectGetMaxX(self.bounds)-6);
	CGFloat miny = ceilf(CGRectGetMinY(self.bounds)+6), midy = ceilf(CGRectGetMidY(self.bounds)), maxy = ceilf(CGRectGetMaxY(self.bounds)-6);
    
	CGContextMoveToPoint(context, minx, midy);
	CGContextAddArcToPoint(context, minx, miny, midx, miny, radius);
	CGContextAddArcToPoint(context, maxx, miny, maxx, midy, radius);
	CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);
	CGContextAddArcToPoint(context, minx, maxy, minx, midy, radius);
    
    // fill
    if (_fillColor) {
        CGContextSetFillColorWithColor(context, _fillColor.CGColor);
    }
    
    // border
    if (_showBorder) {
        CGContextSetLineWidth(context, ceil((self.bounds.size.height-PADDING)*0.11));
        CGContextSetStrokeColorWithColor(context, _borderColor.CGColor);
    } else { // set border color the same as fill color
        CGContextSetLineWidth(context, ceil((self.bounds.size.height-PADDING)*0.11));
        CGContextSetStrokeColorWithColor(context, _fillColor.CGColor);
    }
    CGContextDrawPath(context, kCGPathFillStroke);
        
    // gloss
    if (_showGloss) {
        CGFloat locations[2] = { 0.0, 1.0 };
        CGFloat components[8] = {
            1.0, 1.0, 1.0, 0.8,
            1.0, 1.0, 1.0, 0.0,
        };
        
        CGColorSpaceRef cspace;
        CGGradientRef gradient;
        cspace = CGColorSpaceCreateDeviceRGB();
        gradient = CGGradientCreateWithColorComponents(cspace, components, locations, 2);

        CGFloat halfRadius = ceilf(midy/2.0);
		CGContextMoveToPoint(context, minx, midy/2);
        CGContextAddArcToPoint(context, minx, miny, midx, miny, halfRadius);
        CGContextAddArcToPoint(context, maxx, miny, maxx, midy/2, halfRadius);
        CGContextAddArcToPoint(context, maxx, midy, midx, midy, halfRadius);
        CGContextAddArcToPoint(context, minx, midy, minx, midy/2, halfRadius);
        CGContextClip(context);
        CGContextDrawLinearGradient (context, gradient, CGPointMake(radius, 0), CGPointMake(radius, maxy), kCGGradientDrawsBeforeStartLocation);
    	
        CGColorSpaceRelease(cspace);
        CGGradientRelease(gradient);
    }
    
	CGContextRestoreGState(context);
	
    if (_autoPositioning) {
        [self autoPositionFromSuperView];
    }
	
	[super drawRect:rect];
}

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

@end