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//
// BButton.m
//
// Created by Mathieu Bolard on 31/07/12.
// Copyright (c) 2012 Mathieu Bolard. All rights reserved.
//
// https://github.com/mattlawer/BButton
//
//
// BButton is licensed under the MIT license
// http://opensource.org/licenses/MIT
//
//
// -----------------------------------------
// Edited and refactored by Jesse Squires on 2 April, 2013.
//
// http://github.com/jessesquires/BButton
//
// http://hexedbits.com
//
#import "BButton.h"
#import <CoreGraphics/CoreGraphics.h>
static CGFloat const kBButtonCornerRadiusV2 = 6.0f;
static CGFloat const kBButtonCornerRadiusV3 = 4.0f;
static NSArray * kFontAwesomeStrings;
@interface BButton ()
@property (assign, nonatomic) BButtonStyle buttonStyle;
- (void)setup;
- (void)setTextAttributesForStyle:(BButtonStyle)aStyle;
- (void)didRecieveMemoryWarningNotification:(NSNotification *)notification;
- (NSString *)stringFromFontAwesomeIcon:(FAIcon)icon;
+ (UIColor *)colorForButtonType:(BButtonType)type style:(BButtonStyle)style;
+ (UIColor *)colorForV2StyleButtonWithType:(BButtonType)type;
+ (UIColor *)colorForV3StyleButtonWithType:(BButtonType)type;
+ (NSNumber *)cornerRadiusForStyle:(BButtonStyle)aStyle;
- (NSString *)stringByTrimingWhiteSpaceFromString:(NSString *)str;
- (BOOL)isStringEmpty:(NSString *)str;
- (void)drawBButtonStyleV2InRect:(CGRect)rect withContext:(CGContextRef *)context;
- (void)drawBButtonStyleV3InRect:(CGRect)rect withContext:(CGContextRef *)context;
@end
@implementation BButton
#pragma mark - Setup
- (void)setup
{
[self setBackgroundColor:[UIColor clearColor]];
_shouldShowDisabled = YES;
_buttonStyle = BButtonStyleBootstrapV3;
[self setType:BButtonTypeDefault];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(didRecieveMemoryWarningNotification:)
name:UIApplicationDidReceiveMemoryWarningNotification
object:nil];
}
- (void)setTextAttributesForStyle:(BButtonStyle)aStyle
{
switch (aStyle) {
case BButtonStyleBootstrapV2:
[[self titleLabel] setShadowOffset:CGSizeMake(0.0f, -1.0f)];
[[self titleLabel] setFont:[UIFont boldSystemFontOfSize:17.0f]];
break;
case BButtonStyleBootstrapV3:
[[self titleLabel] setShadowOffset:CGSizeMake(0.0f, 0.0f)];
[[self titleLabel] setFont:[UIFont systemFontOfSize:17.0f]];
break;
}
}
#pragma mark - Initialization
- (id)initWithFrame:(CGRect)frame type:(BButtonType)type style:(BButtonStyle)style
{
return [self initWithFrame:frame
color:[BButton colorForButtonType:type style:style]
style:style];
}
- (id)initWithFrame:(CGRect)frame
type:(BButtonType)type
style:(BButtonStyle)style
icon:(FAIcon)icon
fontSize:(CGFloat)fontSize
{
return [self initWithFrame:frame
color:[BButton colorForButtonType:type style:style]
style:style
icon:icon
fontSize:fontSize];
}
- (id)initWithFrame:(CGRect)frame color:(UIColor *)color style:(BButtonStyle)style
{
self = [self initWithFrame:frame];
if(self) {
_buttonStyle = style;
[self setColor:color];
[self setTextAttributesForStyle:style];
}
return self;
}
- (id)initWithFrame:(CGRect)frame
color:(UIColor *)color
style:(BButtonStyle)style
icon:(FAIcon)icon
fontSize:(CGFloat)fontSize
{
self = [self initWithFrame:frame color:color style:style];
if(self) {
[[self titleLabel] setFont:[UIFont fontWithName:kFontAwesomeFont size:fontSize]];
[[self titleLabel] setTextAlignment:NSTextAlignmentCenter];
[self setTitle:[self stringFromFontAwesomeIcon:icon]
forState:UIControlStateNormal];
}
return self;
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if(self) {
[self setup];
[self setTextAttributesForStyle:_buttonStyle];
}
return self;
}
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if(self) {
[self setup];
}
return self;
}
- (void)dealloc
{
_color = nil;
_buttonCornerRadius = nil;
kFontAwesomeStrings = nil;
[[NSNotificationCenter defaultCenter] removeObserver:self
name:UIApplicationDidReceiveMemoryWarningNotification
object:nil];
}
#pragma mark - Class initialization
+ (BButton *)awesomeButtonWithOnlyIcon:(FAIcon)icon
type:(BButtonType)type
style:(BButtonStyle)style
{
return [BButton awesomeButtonWithOnlyIcon:icon
color:[BButton colorForButtonType:type style:style]
style:style];
}
+ (BButton *)awesomeButtonWithOnlyIcon:(FAIcon)icon
color:(UIColor *)color
style:(BButtonStyle)style
{
return [[BButton alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 40.0f, 40.0f)
color:color
style:style
icon:icon
fontSize:20.0f];
}
#pragma mark - Parent overrides
- (void)setHighlighted:(BOOL)highlighted
{
[super setHighlighted:highlighted];
[self setNeedsDisplay];
}
- (void)setEnabled:(BOOL)enabled
{
[super setEnabled:enabled];
[self setNeedsDisplay];
}
#pragma mark - UIAppearance getters
- (NSNumber *)buttonCornerRadius
{
if(!_buttonCornerRadius) {
_buttonCornerRadius = [[[self class] appearance] buttonCornerRadius];
}
if(_buttonCornerRadius) {
return _buttonCornerRadius;
}
return [BButton cornerRadiusForStyle:_buttonStyle];
}
#pragma mark - Setters
- (void)setColor:(UIColor *)newColor
{
_color = newColor;
if([newColor bb_isLightColor]) {
[self setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[self setTitleShadowColor:[[UIColor whiteColor] colorWithAlphaComponent:0.6f] forState:UIControlStateNormal];
if(self.shouldShowDisabled)
[self setTitleColor:[UIColor colorWithWhite:0.4f alpha:0.5f] forState:UIControlStateDisabled];
}
else {
[self setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[self setTitleShadowColor:[[UIColor blackColor] colorWithAlphaComponent:0.6f] forState:UIControlStateNormal];
if(self.shouldShowDisabled)
[self setTitleColor:[UIColor colorWithWhite:1.0f alpha:0.5f] forState:UIControlStateDisabled];
}
[self setNeedsDisplay];
}
- (void)setShouldShowDisabled:(BOOL)show
{
_shouldShowDisabled = show;
if(show) {
if([self.color bb_isLightColor])
[self setTitleColor:[UIColor colorWithWhite:0.4f alpha:0.5f] forState:UIControlStateDisabled];
else
[self setTitleColor:[UIColor colorWithWhite:1.0f alpha:0.5f] forState:UIControlStateDisabled];
}
else {
if([self.color bb_isLightColor])
[self setTitleColor:[UIColor blackColor] forState:UIControlStateDisabled];
else
[self setTitleColor:[UIColor whiteColor] forState:UIControlStateDisabled];
}
}
#pragma mark - Notifications
- (void)didRecieveMemoryWarningNotification:(NSNotification *)notification
{
NSLog(@"%@ recieved %@", [BButton class], notification.name);
kFontAwesomeStrings = nil;
}
#pragma mark - BButton
- (void)setStyle:(BButtonStyle)style
{
_buttonStyle = style;
[self setColor:_color];
}
- (void)setType:(BButtonType)type
{
[self setColor:[BButton colorForButtonType:type
style:_buttonStyle]];
}
- (void)addAwesomeIcon:(FAIcon)icon beforeTitle:(BOOL)before
{
NSString *iconString = [self stringFromFontAwesomeIcon:icon];
self.titleLabel.font = [UIFont fontWithName:kFontAwesomeFont
size:self.titleLabel.font.pointSize];
NSString *title = [NSString stringWithFormat:@"%@", iconString];
if(self.titleLabel.text && ![self isStringEmpty:self.titleLabel.text]) {
if(before) {
title = [title stringByAppendingFormat:@" %@", self.titleLabel.text];
}
else {
title = [NSString stringWithFormat:@"%@ %@", self.titleLabel.text, iconString];
}
}
[self setTitle:title forState:UIControlStateNormal];
}
- (NSString *)stringFromFontAwesomeIcon:(FAIcon)icon
{
if(!kFontAwesomeStrings) {
kFontAwesomeStrings = [NSString fa_allFontAwesomeStrings];
}
return [NSString fa_stringFromFontAwesomeStrings:kFontAwesomeStrings
forIcon:icon];
}
+ (UIColor *)colorForButtonType:(BButtonType)type style:(BButtonStyle)style
{
switch (style) {
case BButtonStyleBootstrapV2:
return [BButton colorForV2StyleButtonWithType:type];
case BButtonStyleBootstrapV3:
default:
return [BButton colorForV3StyleButtonWithType:type];
}
}
+ (UIColor *)colorForV2StyleButtonWithType:(BButtonType)type
{
switch (type) {
case BButtonTypePrimary:
return [UIColor bb_primaryColorV2];
case BButtonTypeInfo:
return [UIColor bb_infoColorV2];
case BButtonTypeSuccess:
return [UIColor bb_successColorV2];
case BButtonTypeWarning:
return [UIColor bb_warningColorV2];
case BButtonTypeDanger:
return [UIColor bb_dangerColorV2];
case BButtonTypeInverse:
return [UIColor bb_inverseColorV2];
case BButtonTypeTwitter:
return [UIColor bb_twitterColor];
case BButtonTypeFacebook:
return [UIColor bb_facebookColor];
case BButtonTypePurple:
return [UIColor bb_purpleBButtonColor];
case BButtonTypeGray:
return [UIColor bb_grayBButtonColor];
case BButtonTypeDefault:
default:
return [UIColor bb_defaultColorV2];
}
}
+ (UIColor *)colorForV3StyleButtonWithType:(BButtonType)type
{
switch (type) {
case BButtonTypePrimary:
return [UIColor bb_primaryColorV3];
case BButtonTypeInfo:
return [UIColor bb_infoColorV3];
case BButtonTypeSuccess:
return [UIColor bb_successColorV3];
case BButtonTypeWarning:
return [UIColor bb_warningColorV3];
case BButtonTypeDanger:
return [UIColor bb_dangerColorV3];
case BButtonTypeInverse:
return [UIColor bb_inverseColorV3];
case BButtonTypeTwitter:
return [UIColor bb_twitterColor];
case BButtonTypeFacebook:
return [UIColor bb_facebookColor];
case BButtonTypePurple:
return [UIColor bb_purpleBButtonColor];
case BButtonTypeGray:
return [UIColor bb_grayBButtonColor];
case BButtonTypeDefault:
default:
return [UIColor bb_defaultColorV3];
}
}
+ (NSNumber *)cornerRadiusForStyle:(BButtonStyle)aStyle
{
CGFloat r = 0.0f;
switch (aStyle) {
case BButtonStyleBootstrapV2:
r = kBButtonCornerRadiusV2;
break;
case BButtonStyleBootstrapV3:
r = kBButtonCornerRadiusV3;
break;
}
return [NSNumber numberWithFloat:r];
}
#pragma mark - Utilities
- (NSString *)stringByTrimingWhiteSpaceFromString:(NSString *)str
{
return [str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
}
- (BOOL)isStringEmpty:(NSString *)str
{
return [[self stringByTrimingWhiteSpaceFromString:str] isEqualToString:@""];
}
#pragma mark - Drawing
- (void)drawRect:(CGRect)rect
{
[super drawRect:rect];
CGContextRef context = UIGraphicsGetCurrentContext();
if(!context)
return;
switch (self.buttonStyle) {
case BButtonStyleBootstrapV2:
[self drawBButtonStyleV2InRect:rect withContext:&context];
break;
case BButtonStyleBootstrapV3:
[self drawBButtonStyleV3InRect:rect withContext:&context];
break;
}
}
- (void)drawBButtonStyleV2InRect:(CGRect)rect withContext:(CGContextRef *)context
{
UIColor *border = [self.color bb_darkenColorWithValue:0.06f];
UIColor *shadow = [self.color bb_lightenColorWithValue:0.50f];
CGSize shadowOffset = CGSizeMake(0.0f, 1.0f);
CGFloat shadowBlurRadius = 2.0f;
UIBezierPath *roundedRectanglePath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0.5f, 0.5f, rect.size.width-1.0f, rect.size.height-1.0f)
cornerRadius:[self.buttonCornerRadius floatValue]];
CGContextSaveGState(*context);
[roundedRectanglePath addClip];
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
UIColor *topColor = (self.shouldShowDisabled && !self.enabled) ? [self.color bb_darkenColorWithValue:0.12f] : [self.color bb_lightenColorWithValue:0.12f];
NSArray *newGradientColors = [NSArray arrayWithObjects:(id)topColor.CGColor, (id)self.color.CGColor, nil];
CGFloat newGradientLocations[] = {0.0f, 1.0f};
CGGradientRef gradient = CGGradientCreateWithColors(colorSpace, (__bridge CFArrayRef)newGradientColors, newGradientLocations);
CGColorSpaceRelease(colorSpace);
CGContextDrawLinearGradient(*context,
gradient,
CGPointMake(0.0f, self.highlighted ? rect.size.height - 0.5f : 0.5f),
CGPointMake(0.0f, self.highlighted ? 0.5f : rect.size.height - 0.5f), 0.0f);
CGGradientRelease(gradient);
CGContextRestoreGState(*context);
if(!self.highlighted) {
// Rounded Rectangle Inner Shadow
CGRect roundedRectangleBorderRect = CGRectInset([roundedRectanglePath bounds], -shadowBlurRadius, -shadowBlurRadius);
roundedRectangleBorderRect = CGRectOffset(roundedRectangleBorderRect, -shadowOffset.width, -shadowOffset.height);
roundedRectangleBorderRect = CGRectInset(CGRectUnion(roundedRectangleBorderRect, [roundedRectanglePath bounds]), -1.0f, -1.0f);
UIBezierPath *roundedRectangleNegativePath = [UIBezierPath bezierPathWithRect: roundedRectangleBorderRect];
[roundedRectangleNegativePath appendPath: roundedRectanglePath];
roundedRectangleNegativePath.usesEvenOddFillRule = YES;
CGContextSaveGState(*context);
CGFloat xOffset = shadowOffset.width + round(roundedRectangleBorderRect.size.width);
CGFloat yOffset = shadowOffset.height;
CGContextSetShadowWithColor(*context,
CGSizeMake(xOffset + copysign(0.1f, xOffset), yOffset + copysign(0.1f, yOffset)),
shadowBlurRadius,
shadow.CGColor);
[roundedRectanglePath addClip];
CGAffineTransform transform = CGAffineTransformMakeTranslation(-round(roundedRectangleBorderRect.size.width), 0.0f);
[roundedRectangleNegativePath applyTransform: transform];
[[UIColor grayColor] setFill];
[roundedRectangleNegativePath fill];
CGContextRestoreGState(*context);
}
[border setStroke];
roundedRectanglePath.lineWidth = 1.0f;
[roundedRectanglePath stroke];
}
- (void)drawBButtonStyleV3InRect:(CGRect)rect withContext:(CGContextRef *)context
{
CGContextSaveGState(*context);
UIColor *fill = (!self.highlighted) ? self.color : [self.color bb_darkenColorWithValue:0.06f];
if(!self.enabled)
[fill bb_desaturatedColorToPercentSaturation:0.60f];
CGContextSetFillColorWithColor(*context, fill.CGColor);
UIColor *border = (!self.highlighted) ? [self.color bb_darkenColorWithValue:0.06f] : [self.color bb_darkenColorWithValue:0.12f];
if(!self.enabled)
[border bb_desaturatedColorToPercentSaturation:0.60f];
CGContextSetStrokeColorWithColor(*context, border.CGColor);
CGContextSetLineWidth(*context, 1.0f);
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0.5f, 0.5f, rect.size.width-1.0f, rect.size.height-1.0f)
cornerRadius:[self.buttonCornerRadius floatValue]];
CGContextAddPath(*context, path.CGPath);
CGContextDrawPath(*context, kCGPathFillStroke);
CGContextRestoreGState(*context);
}
@end
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