//

// OTPAuthClock.m

//

// Copyright 2011 Google Inc.

//

// 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 "OTPAuthClock.h"

#import "UIColor+MobileColors.h"

@interface OTPAuthClock ()

@property (nonatomic, strong, readwrite) NSTimer *timer;

@property (nonatomic, assign, readwrite) NSTimeInterval period;

- (void)startUpTimer;

@end

@implementation OTPAuthClock

- (id)initWithFrame:(CGRect)frame period:(NSTimeInterval)period {

if ((self = [super initWithFrame:frame])) {

[self startUpTimer];

self.opaque = NO;

self.period = period;

UIApplication *app = [UIApplication sharedApplication];

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

[nc addObserver:self

selector:@selector(applicationDidBecomeActive:)

name:UIApplicationDidBecomeActiveNotification

object:app];

[nc addObserver:self

selector:@selector(applicationWillResignActive:)

name:UIApplicationWillResignActiveNotification

object:app];

}

return self;

}

- (void)dealloc {

[[NSNotificationCenter defaultCenter] removeObserver:self];

}

- (void)redrawTimer:(NSTimer *)timer {

[self setNeedsDisplay];

}

- (void)drawRect:(CGRect)rect {

NSTimeInterval seconds = [[NSDate date] timeIntervalSince1970];

CGFloat mod = fmod(seconds, self.period);

CGFloat percent = mod / self.period;

CGContextRef context = UIGraphicsGetCurrentContext();

CGRect bounds = self.bounds;

[[UIColor clearColor] setFill];

CGContextFillRect(context, rect);

CGFloat midX = CGRectGetMidX(bounds);

CGFloat midY = CGRectGetMidY(bounds);

CGFloat radius = midY - 4;

//Draw bg

CGContextMoveToPoint(context, midX, midY);

CGFloat start = -M_PI_2;

CGFloat end = 2 * M_PI;

CGFloat sweep = end * percent + start;

CGContextAddArc(context, midX, midY, radius, start, sweep, 1);

[[[UIColor blackColor] colorWithAlphaComponent:0.7] setFill];

CGContextFillPath(context);

if (percent > .875) {

CGContextMoveToPoint(context, midX, midY);

CGContextAddArc(context, midX, midY, radius, start, sweep, 1);

CGFloat alpha = (percent - .875) / .125;

[[[UIColor redColor] colorWithAlphaComponent:alpha * 0.5] setFill];

CGContextFillPath(context);

}

// Draw top shadow

// CGFloat offset = 0.25;

// CGFloat x = midX + (radius - offset) * cos(0 - M_PI_4);

// CGFloat y = midY + (radius - offset) * sin(0 - M_PI_4);

// [[UIColor blackColor] setStroke];

// CGContextMoveToPoint(context, x , y);

// CGContextAddArc(context,

// midX, midY, radius - offset, 0 - M_PI_4, 5.0 * M_PI_4, 1);

// CGContextStrokePath(context);

// Draw bottom highlight

// x = midX + (radius + offset) * cos(0 + M_PI_4);

// y = midY + (radius + offset) * sin(0 + M_PI_4);

// [[UIColor whiteColor] setStroke];

// CGContextMoveToPoint(context, x , y);

// CGContextAddArc(context,

// midX, midY, radius + offset, 0 + M_PI_4, 3.0 * M_PI_4, 0);

// CGContextStrokePath(context);

//

// // Draw face

// [[UIColor googleBlueTextColor] setStroke];

// CGContextMoveToPoint(context, midX + radius , midY);

// CGContextAddArc(context, midX, midY, radius, 0, 2.0 * M_PI, 1);

// CGContextStrokePath(context);

//

// if (percent > .875) {

// CGFloat alpha = (percent - .875) / .125;

// [[[UIColor redColor] colorWithAlphaComponent:alpha] setStroke];

// CGContextStrokePath(context);

// }

// Hand

// x = midX + radius * cos(sweep);

// y = midY + radius * sin(sweep);

// CGContextMoveToPoint(context, midX, midY);

// CGContextAddLineToPoint(context, x, y);

// CGContextStrokePath(context);

}

- (void)invalidate {

[self.timer invalidate];

self.timer = nil;

}

- (void)startUpTimer {

self.timer = [NSTimer scheduledTimerWithTimeInterval:1

target:self

selector:@selector(redrawTimer:)

userInfo:nil

repeats:YES];

}

- (void)applicationDidBecomeActive:(UIApplication *)application {

[self startUpTimer];

[self redrawTimer:nil];

}

- (void)applicationWillResignActive:(UIApplication *)application {

[self invalidate];

}

- (void)willMoveToSuperview:(UIView *)newSuperview

{

[super willMoveToSuperview:newSuperview];

if (!newSuperview) {

[self invalidate];

}

}

@end