//

// FreeOTP

//

// Authors: Nathaniel McCallum <npmccallum@redhat.com>

//

// Copyright (C) 2013 Nathaniel McCallum, Red Hat

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

//

#import "CircleProgressView.h"

@implementation CircleProgressView

- (id)initWithFrame:(CGRect)frame {

self = [super initWithFrame:frame];

if (self == nil)

return nil;

self.hollow = false;

self.clockwise = true;

self.threshold = 0;

self.progress = 0.0;

self.backgroundColor = [UIColor clearColor];

return self;

}

- (id)initWithCoder:(NSCoder*)aDecoder {

self = [super initWithCoder:aDecoder];

if (self == nil)

return nil;

self.hollow = false;

self.clockwise = true;

self.threshold = 0;

self.progress = 0.0;

self.backgroundColor = [UIColor clearColor];

return self;

}

- (void)setHollow:(BOOL)hollow {

_hollow = hollow;

[self setNeedsDisplay];

}

- (void)setClockwise:(BOOL)clockwise {

_clockwise = clockwise;

[self setNeedsDisplay];

}

- (void)setThreshold:(float)threshold {

_threshold = threshold;

[self setNeedsDisplay];

}

- (void)setProgress:(float)progress {

_progress = progress;

[self setNeedsDisplay];

}

- (void)drawRect:(CGRect)xxx {

CGFloat progress = self.clockwise ? self.progress : (1.0f - self.progress);

CGPoint center = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));

CGFloat radius = MAX(MIN(self.bounds.size.height / 2.0, self.bounds.size.width / 2.0) - 4, 1);

CGFloat radians = MAX(MIN(progress * 2 * M_PI, 2 * M_PI), 0);

UIColor* color = [UIColor colorWithRed:0.0 green:122.0/255.0 blue:1.0 alpha:1.0];

if (self.threshold < 0 && self.progress < fabsf(self.threshold))

color = [UIColor colorWithRed:1.0 green:self.progress * (1 / fabsf(self.threshold)) blue:0.0 alpha:1.0];

else if (self.threshold > 0 && self.progress > self.threshold)

color = [UIColor colorWithRed:1.0 green:(1 - self.progress) * (1 / (1 - self.threshold)) blue:0.0 alpha:1.0];

UIBezierPath* path = [UIBezierPath bezierPathWithArcCenter:center radius:radius

startAngle:-M_PI_2 endAngle:radians-M_PI_2 clockwise:self.clockwise];

if (self.hollow) {

[color setStroke];

[path setLineWidth:3.0];

[path stroke];

} else {

[color setFill];

[path addLineToPoint:center];

[path addClip];

UIRectFill(self.bounds);

}

}

@end