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/*
   NSAnimationContext.h
 
   Created by Gregory John Casamento on Wed Jun 10 2015.
   Copyright (c) 2015 Free Software Foundation, Inc.
 
   Author: Gregory Casamento <greg.casamento@gmail.com>
 
   This file is part of the GNUstep GUI Library.
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; see the file COPYING.LIB.
   If not, see <http://www.gnu.org/licenses/> or write to the 
   Free Software Foundation, 51 Franklin Street, Fifth Floor, 
   Boston, MA 02110-1301, USA.
 */ 


#ifndef _GNUstep_H_NSAnimationContext_
#define _GNUstep_H_NSAnimationContext_

#import <Foundation/NSObject.h>
#import <Foundation/NSDate.h>

@class NSAnimationContext;

DEFINE_BLOCK_TYPE_NO_ARGS(GSAnimationContextCompletionHandler, void);
DEFINE_BLOCK_TYPE(GSAnimationContextChanges, void, NSAnimationContext*);

@interface NSAnimationContext : NSObject
{
  NSTimeInterval _duration;
  GSAnimationContextCompletionHandler _completionHandler;
}

// Begin and end grouping
+ (void) beginGrouping;
+ (void) endGrouping;

// Retrieve current context
+ (NSAnimationContext *)currentContext;

// run
+ (void)runAnimationGroup: (GSAnimationContextChanges)changes
  completionHandler: (GSAnimationContextCompletionHandler)completionHandler;

// Properties...
- (void) setDuration: (NSTimeInterval)duration;
- (NSTimeInterval) duration;
				      
- (GSAnimationContextCompletionHandler) completionHandler;
- (void) setCompletionHandler: (GSAnimationContextCompletionHandler) completionHandler;

@end

#endif