Add skeleton for NSAnimationContext.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@38637 72102866-910b-0410-8b05-ffd578937521

Headers/AppKit/NSAnimationContext.h

@@ -0,0 +1,53 @@
+/*
+   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>
+
+@interface NSAnimationContext : NSObject
+{
+  NSTimeInterval _duration;
+}
+
+// Begin and end grouping
++ (void) beginGrouping;
++ (void) endGrouping;
+
+// Retrieve current context
++ (NSAnimationContext *)currentContext;
+
+// Properties...
+- (void) setDuration: (NSTimeInterval)duration;
+- (NSTimeInterval) duration;
+
+@end
+
+#endif