1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_BASE_COCOA_HOVER_BUTTON_ 6 #define UI_BASE_COCOA_HOVER_BUTTON_ 7 8 #import <Cocoa/Cocoa.h> 9 10 #import "ui/base/cocoa/tracking_area.h" 11 #import "ui/base/ui_base_export.h" 12 13 // A button that changes when you hover over it and click it. 14 UI_BASE_EXPORT 15 @interface HoverButton : NSButton { 16 @protected 17 // Enumeration of the hover states that the close button can be in at any one 18 // time. The button cannot be in more than one hover state at a time. 19 enum HoverState { 20 kHoverStateNone = 0, 21 kHoverStateMouseOver = 1, 22 kHoverStateMouseDown = 2 23 }; 24 25 HoverState hoverState_; 26 27 @private 28 // Tracking area for button mouseover states. Nil if not enabled. 29 ui::ScopedCrTrackingArea trackingArea_; 30 } 31 32 @property(nonatomic) HoverState hoverState; 33 34 // Enables or disables the tracking for the button. 35 - (void)setTrackingEnabled:(BOOL)enabled; 36 37 // Checks to see whether the mouse is in the button's bounds and update 38 // the image in case it gets out of sync. This occurs to the close button 39 // when you close a tab so the tab to the left of it takes its place, and 40 // drag the button without moving the mouse before you press the button down. 41 - (void)checkImageState; 42 43 @end 44 45 #endif // UI_BASE_COCOA_HOVER_BUTTON_ 46