GoalView.m

//
//  GoalView.m
//  Stepr
//
//  Created by Philipp Hackbarth on 31.10.13.
//  Copyright (c) 2013 Hackbarth GFX. All rights reserved.
//

#import "GoalView.h"
#import "StepManager.h"
#import "AppSettings.h"

@implementation GoalView

static const CGFloat stroke = 25.0f;
static const CGFloat pi = 3.1416f;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self initialize];
    }

    return self;
}

- (void)initialize
{
    self.reachedInPercent = [NSNumber numberWithFloat:0.0f];

    // vollen Kreis im Hintergrund erstellen
    [self createBackgroundCircle];
}

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

- (void)prepareForInterfaceBuilder {
    self.reachedInPercent = [NSNumber numberWithFloat:.75f];
    
    [self createBackgroundCircle];
    [self createCircle];
}

-(void) createBackgroundCircle {
    // Kreisdaten
    CGFloat width = self.layer.bounds.size.width;
    CGFloat height = self.layer.bounds.size.height;
    
    CGFloat radius = width / 2.0f - stroke;
    
    CGPoint startPoint = CGPointMake(width / 2.0f, height / 2.0f);
    
    //Hintergrund-Kreis
    CAShapeLayer* backgroundCircle = [CAShapeLayer layer];
    
    backgroundCircle.path = [UIBezierPath bezierPathWithArcCenter:startPoint radius:radius startAngle:0 endAngle:2.0f * pi clockwise:YES].CGPath;
    backgroundCircle.opacity = 0.05f;
    
    backgroundCircle.fillColor = [UIColor clearColor].CGColor;
    backgroundCircle.strokeColor = [UIColor blackColor].CGColor;
    backgroundCircle.lineWidth = stroke;
    backgroundCircle.lineCap = kCALineCapRound;
    
    [self.layer addSublayer:backgroundCircle];
}

-(void) createCircle {
    // Kreisdaten
    CGFloat width = self.layer.bounds.size.width;
    CGFloat height = self.layer.bounds.size.height;
    CGPoint startPoint = CGPointMake(width / 2.0f, height / 2.0f);
    CGFloat radius = width / 2.0f - stroke;
    
    // Animierter Kreis
    self.circle = [CAShapeLayer layer];
    
    // Configure the apperence of the circle
    self.circle.fillColor = [UIColor clearColor].CGColor;
    self.circle.strokeColor = [StepManager steprGreenColor].CGColor;
    self.circle.lineWidth = stroke;
    self.circle.lineCap = kCALineCapRound;
    self.circle.opacity = 0.80f;
    
    // Add to parent layer
    [self.layer addSublayer:self.circle];
    
    self.circle.path = [UIBezierPath bezierPathWithArcCenter:startPoint radius:radius startAngle:-pi / 2.0f
                                                    endAngle:([self.reachedInPercent floatValue] * (2 * pi)) - pi / 2.0f
                                                   clockwise:YES].CGPath;
}

- (void)Animate
{
    self.stepsText.text = [NSString stringWithFormat:@"%lu", (unsigned long)self.stepCount];
    self.goalText.text = [NSString stringWithFormat:NSLocalizedString(@"of %lu", nil), (unsigned long)[AppSettings getInstance].goal];
    self.caloriesText.text = [NSString stringWithFormat:@"%d kcal", (int)[StepManager getCaloriesForSteps:self.stepCount]];
    self.distanceText.text = [NSString stringWithFormat:@"%@", [StepManager localizedDistanceFor:self.stepCount*self.strideLength]];

    //! Kreis erstellen
    [self createCircle];

    // Configure animation
    CABasicAnimation* drawAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
    drawAnimation.duration = 2.0; // "animate over 10 seconds or so.."
    drawAnimation.repeatCount = 1.0; // Animate only once..
    drawAnimation.removedOnCompletion = YES; // Remain stroked after the animation..

    // Animate from no part of the stroke being drawn to the entire stroke being drawn
    drawAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
    drawAnimation.toValue = [NSNumber numberWithFloat:1.0f];

    // Experiment with timing to get the appearence to look the way you want
    drawAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; //kCAMediaTimingFunctionEaseIn

    // Add the animation to the circle
    [self.circle addAnimation:drawAnimation forKey:@"drawCircleAnimation"];
}

- (void)ResetAnimation
{
    [self.circle removeAllAnimations];
    [self.circle removeFromSuperlayer];
}

- (void)setReachedInPercent:(NSNumber*)reachedInPercent
{
    _reachedInPercent = [NSNumber numberWithFloat:MIN([reachedInPercent floatValue], 1.0f)];
}

- (void) updateGoalText
{
    self.goalText.text = [NSString stringWithFormat:NSLocalizedString(@"of %lu", nil), (unsigned long)[AppSettings getInstance].goal];
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    
    
}
*/

@end