NSProgressIndicator+Dejal.m

//
//  NSProgressIndicator+Dejal.m
//  Dejal Open Source Categories
//
//  Created by David Sinclair on 2016-02-19.
//  Copyright (c) 2016 Dejal Systems, LLC. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without modification,
//  are permitted provided that the following conditions are met:
//
//  - Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
//
//  - Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
//  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
//  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
//  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
//  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
//  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
//  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
//  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//

#import "NSProgressIndicator+Dejal.h"


@implementation NSProgressIndicator (Dejal)

/**
 Starts the animation of an indeterminate indicator, with its alpha value set to zero and fading in over a specified duration.
 
 @param fadeInDuration How long to take to fade in.
 
 @author DJS 2016-02.
 */

- (void)dejal_startAnimationWithFadeInDuration:(NSTimeInterval)fadeInDuration;
{
    self.alphaValue = 0.0;
    
    [self startAnimation:nil];
    
    [NSAnimationContext runAnimationGroup:^(NSAnimationContext * _Nonnull context)
     {
         context.duration = fadeInDuration;
         self.animator.alphaValue = 1.0;
     }
                        completionHandler:nil];
}

@end