GiGaMaskTime/GIGA/Modules/Mask/Exercises/View/NYSliderPopover/NYSliderPopover.m

//
//  NYSliderPopover.m
//  NYReader
//
//  Created by Cassius Pacheco on 21/12/12.
//  Copyright (c) 2012 Nyvra Software. All rights reserved.
//

#import "NYSliderPopover.h"
#import "NYPopover.h"
#define thumbBound_x 10
#define thumbBound_y 20

@interface NYSliderPopover()
{
    CGRect _lastBounds;
}
@end

@implementation NYSliderPopover

- (instancetype)init
{
    self = [super init];
    if (self) {
        [self thumbimageView];
        [self createUI];
    }
    return self;
}

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self thumbimageView];
        [self createUI];
    }
    return self;
}

#pragma mark -
#pragma mark UISlider methods

- (NYPopover *)popover
{
    if (_popover == nil){
        //Default size, can be changed after
        [self addTarget:self action:@selector(updatePopoverFrame) forControlEvents:UIControlEventValueChanged];
        _popover = [[NYPopover alloc] initWithFrame:CGRectMake(self.frame.origin.x, self.frame.origin.y - 32, 40, 32)];
        [self updatePopoverFrame];
        _popover.alpha = 0;
        [self.superview addSubview:_popover];
//        [self thumbimageView];
//        [self createUI];
    }
    
    return _popover;
}

- (void)setValue:(float)value
{
    [super setValue:value];
    //[self updatePopoverFrame];
    
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self updatePopoverFrame];
    [self showPopoverAnimated:YES];
    [super touchesBegan:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self hidePopoverAnimated:YES];
    [super touchesEnded:touches withEvent:event];
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self hidePopoverAnimated:YES];
    [super touchesCancelled:touches withEvent:event];
}

#pragma mark -
#pragma mark - Popover methods

- (void)updatePopoverFrame
{
    //Inspired in Collin Ruffenach's ELCSlider https://github.com/elc/ELCSlider/blob/master/ELCSlider/ELCSlider.m#L53
    
    CGFloat minimum =  self.minimumValue;
	CGFloat maximum = self.maximumValue;
	CGFloat value = self.value;
	
	if (minimum < 0.0) {
        
		value = self.value - minimum;
		maximum = maximum - minimum;
		minimum = 0.0;
	}
	
	CGFloat x = self.frame.origin.x;
    CGFloat maxMin = (maximum + minimum) / 2.0;
    
    x += (((value - minimum) / (maximum - minimum)) * self.frame.size.width) - (self.popover.frame.size.width / 2.0);
	
	if (value > maxMin) {
		
		value = (value - maxMin) + (minimum * 1.0);
		value = value / maxMin;
		value = value * 11.0;
		
		x = x - value;
        
	} else {
		
		value = (maxMin - value) + (minimum * 1.0);
		value = value / maxMin;
		value = value * 11.0;
		
		x = x + value;
	}
    
    CGRect popoverRect = self.popover.frame;
    popoverRect.origin.x = x;
    popoverRect.origin.y = self.frame.origin.y - popoverRect.size.height - 1;
    
    self.popover.frame = popoverRect;
}

- (void)showPopover
{
    [self showPopoverAnimated:NO];
}

- (void)showPopoverAnimated:(BOOL)animated
{
    if (animated) {
        [UIView animateWithDuration:0.25 animations:^{
            self.popover.alpha = 1.0;
        }];
    } else {
        self.popover.alpha = 1.0;
    }
}

- (void)hidePopover
{
    [self hidePopoverAnimated:NO];
}

- (void)hidePopoverAnimated:(BOOL)animated
{
    if (animated) {
        [UIView animateWithDuration:0.25 animations:^{
            self.popover.alpha = 0;
        }];
    } else {
        self.popover.alpha = 0;
    }
}

-(void)createUI{
    
    self.minimumValue = 0.0;
    self.maximumValue = 1.0;
//    self.minimumTrackTintColor = GIGARGB(216,216, 216, 1);
//    self.maximumTrackTintColor = GIGARGB(216,216, 216, 1);
    self.minimumTrackTintColor = GIGAUIColorFromRGBA(0xEA4D4D);
    self.maximumTrackTintColor = GIGAUIColorFromRGBA(0xEA4D4D);
    
}

-(CGRect)trackRectForBounds:(CGRect)bounds
{
    bounds.origin.x = bounds.origin.x;
    bounds.origin.y = bounds.origin.y;
    bounds.size.height = bounds.size.height;
    bounds.size.width = bounds.size.width;
    return  bounds;
}



-(void)thumbimageView{
    
    [self setThumbImage:[self OriginImage:[UIImage imageNamed:@"btn_slider_thumb"] scaleToSize:CGSizeMake(40, 40)] forState:UIControlStateNormal];
    [self setThumbImage:[self OriginImage:[UIImage imageNamed:@"btn_slider_thumb"] scaleToSize:CGSizeMake(40, 40)] forState:UIControlStateHighlighted];
}

-(UIImage*) OriginImage:(UIImage*)image scaleToSize:(CGSize)size

{
    UIGraphicsBeginImageContext(size);//size为CGSize类型，即你所需要的图片尺寸
    [image drawInRect:CGRectMake(0,0, size.width, size.height)];
    
    UIImage* scaledImage =UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    return scaledImage;
    
}


// 扩大thumb 触控区域
- (CGRect)thumbRectForBounds:(CGRect)bounds trackRect:(CGRect)rect value:(float)value

{
    rect.origin.x = rect.origin.x;
    rect.size.width = rect.size.width ;
    CGRect result = [super thumbRectForBounds:bounds trackRect:rect value:value];
    
    _lastBounds = result;
    return result;
    
}

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event{
    
    UIView *result = [super hitTest:point withEvent:event];
    
    if (point.x < 0 || point.x > self.bounds.size.width){
        
        return result;
        
    }
    
    if ((point.y >= -thumbBound_y) && (point.y < _lastBounds.size.height + thumbBound_y)) {
        float value = 0.0;
        value = point.x - self.bounds.origin.x;
        value = value/self.bounds.size.width;
        
        value = value < 0? 0 : value;
        value = value > 1? 1: value;
        
        value = value * (self.maximumValue - self.minimumValue) + self.minimumValue;
        [self setValue:value animated:YES];
    }
    return result;
    
}

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event{
    BOOL result = [super pointInside:point withEvent:event];
    if (!result && point.y > -10) {
        if ((point.x >= _lastBounds.origin.x - thumbBound_x) && (point.x <= (_lastBounds.origin.x + _lastBounds.size.width + thumbBound_x)) && (point.y < (_lastBounds.size.height + thumbBound_y))) {
            result = YES;
        }
    }
    return result;
}


@end