/*
        File: AAPLStepperViewController.m
    Abstract: A view controller that demonstrates how to use UIStepper.
     Version: 2.12
    
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*/

#import "AAPLStepperViewController.h"

@interface AAPLStepperViewController ()

@property (nonatomic, weak) IBOutlet UIStepper *defaultStepper;
@property (nonatomic, weak) IBOutlet UIStepper *tintedStepper;
@property (nonatomic, weak) IBOutlet UIStepper *customStepper;

@property (nonatomic, weak) IBOutlet UILabel *defaultStepperLabel;
@property (nonatomic, weak) IBOutlet UILabel *tintedStepperLabel;
@property (nonatomic, weak) IBOutlet UILabel *customStepperLabel;

@end


#pragma mark -

@implementation AAPLStepperViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    [self configureDefaultStepper];
    [self configureTintedStepper];
    [self configureCustomStepper];
}


#pragma mark - Configuration

- (void)configureDefaultStepper {
    self.defaultStepper.value = 0;
    self.defaultStepper.minimumValue = 0;
    self.defaultStepper.maximumValue = 10;
    self.defaultStepper.stepValue = 1;

    self.defaultStepperLabel.text = [NSString stringWithFormat:@"%ld", (long)self.defaultStepper.value];
    [self.defaultStepper addTarget:self action:@selector(stepperValueDidChange:) forControlEvents:UIControlEventValueChanged];
}

- (void)configureTintedStepper {
    self.tintedStepper.tintColor = [UIColor aapl_applicationBlueColor];

    self.tintedStepperLabel.text = [NSString stringWithFormat:@"%ld", (long)self.tintedStepper.value];
    [self.tintedStepper addTarget:self action:@selector(stepperValueDidChange:) forControlEvents:UIControlEventValueChanged];
}

- (void)configureCustomStepper {
    // Set the background image states.
    [self.customStepper setBackgroundImage:[UIImage imageNamed:@"stepper_and_segment_background"] forState:UIControlStateNormal];
    [self.customStepper setBackgroundImage:[UIImage imageNamed:@"stepper_and_segment_background_highlighted"] forState:UIControlStateHighlighted];
    [self.customStepper setBackgroundImage:[UIImage imageNamed:@"stepper_and_segment_background_disabled"] forState:UIControlStateDisabled];
    
    // Set the image which will be painted in between the two stepper segments (depends on the states of both segments).
    [self.customStepper setDividerImage:[UIImage imageNamed:@"stepper_and_segment_divider"] forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateNormal];
    
    // Set the image for the + button.
    [self.customStepper setIncrementImage:[UIImage imageNamed:@"stepper_increment"] forState:UIControlStateNormal];
    
    // Set the image for the - button.
    [self.customStepper setDecrementImage:[UIImage imageNamed:@"stepper_decrement"] forState:UIControlStateNormal];

    self.customStepperLabel.text = [NSString stringWithFormat:@"%ld", (long)self.customStepper.value];
    [self.customStepper addTarget:self action:@selector(stepperValueDidChange:) forControlEvents:UIControlEventValueChanged];
}


#pragma mark - Actions

- (void)stepperValueDidChange:(UIStepper *)stepper {
    NSLog(@"A stepper changed its value: %@.", stepper);

    // Figure out which stepper was selected and update its associated label.
    UILabel *stepperLabel;
    if (self.defaultStepper == stepper) {
        stepperLabel = self.defaultStepperLabel;
    }
    else if (self.tintedStepper == stepper) {
        stepperLabel = self.tintedStepperLabel;
    }
    else if (self.customStepper == stepper) {
        stepperLabel = self.customStepperLabel;
    }

    stepperLabel.text = [NSString stringWithFormat:@"%ld", (long)stepper.value];
}

@end