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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_COCOA_THROBBER_VIEW_H_
#define CHROME_BROWSER_COCOA_THROBBER_VIEW_H_
#import <Cocoa/Cocoa.h>
#include "base/scoped_nsobject.h"
@class TimerTarget;
// A class that knows how to draw an animated state to indicate progress.
// Currently draws via a sequence of frames in an image, but may ultimately be
// written to render paths that are rotated around a center origin. Creating
// the class starts the animation, destroying it stops it. There is no state
// where the class is frozen on an image and not animating.
@interface ThrobberView : NSView {
@private
scoped_nsobject<CIImage> image_;
scoped_nsobject<TimerTarget> target_; // Target of animation timer.
NSTimer* timer_; // Animation timer. Weak, owned by runloop.
unsigned int numFrames_; // Number of frames in this animation.
unsigned int animationFrame_; // Current frame of the animation,
// [0..numFrames_)
}
// Creates the view with |frame| and the image strip desginated by |image|. The
// image needs to be made of squares such that the height divides evently into
// the width. Takes ownership of |image|.
- (id)initWithFrame:(NSRect)frame image:(NSImage*)image;
// Allows changing the image once the view has been created, such as when the
// view is loaded from a nib. The same restrictions as above apply.
- (void)setImage:(NSImage*)image;
@end
#endif // CHROME_BROWSER_COCOA_THROBBER_VIEW_H_
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