Menu for the OSX app launcher.

ui/base/cocoa/controls/hover_image_menu_button_cell.h

+// Copyright 2013 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 UI_BASE_COCOA_CONTROLS_HOVER_IMAGE_MENU_BUTTON_CELL_H_
+#define UI_BASE_COCOA_CONTROLS_HOVER_IMAGE_MENU_BUTTON_CELL_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/memory/scoped_nsobject.h"
+#include "ui/base/ui_export.h"
+
+// A custom NSPopUpButtonCell that permits a hover image, and draws only an
+// image in its frame; no border, bezel or drop-down arrow. Use setDefaultImage:
+// to set the default image, setAlternateImage: to set the button shown while
+// the menu is active, and setHoverImage: for the mouseover hover image.
+UI_EXPORT
+@interface HoverImageMenuButtonCell : NSPopUpButtonCell {
+ @private
+  scoped_nsobject<NSImage> hoverImage_;
+  BOOL hovered_;
+}
+
+@property(retain, nonatomic) NSImage* hoverImage;
+@property(assign, nonatomic, getter=isHovered) BOOL hovered;
+
+// Return the image that would be drawn based on the current state flags.
+- (NSImage*)imageToDraw;
+
+// Set the default image to show on the menu button.
+- (void)setDefaultImage:(NSImage*)defaultImage;
+
+@end
+
+#endif  // UI_BASE_COCOA_CONTROLS_HOVER_IMAGE_MENU_BUTTON_CELL_H_