mirror of https://github.com/LIJI32/SameBoy.git
81 lines
1.9 KiB
Objective-C
81 lines
1.9 KiB
Objective-C
#import "GBTemperatureSlider.h"
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static inline void temperature_tint(double temperature, double *r, double *g, double *b)
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{
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if (temperature >= 0) {
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*r = 1;
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*g = pow(1 - temperature, 0.375);
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if (temperature >= 0.75) {
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*b = 0;
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}
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else {
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*b = sqrt(0.75 - temperature) / sqrt(0.75);
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}
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}
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else {
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*b = 1;
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double squared = pow(temperature, 2);
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*g = 0.125 * squared + 0.3 * temperature + 1.0;
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*r = 0.21875 * squared + 0.5 * temperature + 1.0;
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}
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}
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@implementation GBTemperatureSlider
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- (instancetype)initWithFrame:(CGRect)frame
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{
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self = [super initWithFrame:frame];
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[self addTarget:self action:@selector(valueChanged) forControlEvents:UIControlEventValueChanged];
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return self;
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}
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- (void)updateTint
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{
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double r, g, b;
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temperature_tint(self.value, &r, &g, &b);
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self.thumbTintColor = [UIColor colorWithRed:r green:g blue:b alpha:1.0];
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}
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- (void)setValue:(float)value
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{
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[super setValue:value];
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[self updateTint];
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}
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- (void)valueChanged
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{
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if (fabsf(self.value) < 0.05 && self.value != 0) {
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self.value = 0;
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}
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else {
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[self updateTint];
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}
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}
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-(UIImage *)maximumTrackImageForState:(UIControlState)state
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{
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return [[UIImage alloc] init];
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}
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-(UIImage *)minimumTrackImageForState:(UIControlState)state
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{
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return [[UIImage alloc] init];
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}
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- (void)drawRect:(CGRect)rect
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{
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CGSize size = self.bounds.size;
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UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(2, round(size.height / 2 - 1.5), size.width - 4, 3) cornerRadius:4];
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[path appendPath:[UIBezierPath bezierPathWithRoundedRect:CGRectMake(round(size.width / 2 - 1.5), 12, 3, size.height - 24) cornerRadius:4]];
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[[UIColor colorWithRed:120 / 255.0
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green:120 / 255.0
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blue:130 / 255.0
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alpha:70 / 255.0] set];
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[path fill];
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[super drawRect:rect];
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}
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@end
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