1 // Copyright (c) 2012 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 ASH_WM_GESTURES_TRAY_GESTURE_HANDLER_H_ 6 #define ASH_WM_GESTURES_TRAY_GESTURE_HANDLER_H_ 7 8 #include "base/basictypes.h" 9 #include "base/compiler_specific.h" 10 #include "ui/views/widget/widget_observer.h" 11 12 namespace ui { 13 class GestureEvent; 14 } 15 16 namespace ash { 17 18 // Handles gesture events on the shelf to show the system tray bubble. 19 class TrayGestureHandler : public views::WidgetObserver { 20 public: 21 TrayGestureHandler(); 22 virtual ~TrayGestureHandler(); 23 24 // Handles a gesture-update event and updates the dragging state of the tray 25 // bubble. Returns true if the handler can continue to process gesture events 26 // for the bubble. Returns false if it should no longer receive gesture 27 // events. 28 bool UpdateGestureDrag(const ui::GestureEvent& event); 29 30 void CompleteGestureDrag(const ui::GestureEvent& event); 31 32 private: 33 virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE; 34 35 // The widget for the tray-bubble. 36 views::Widget* widget_; 37 38 // The amount that has been dragged. 39 float gesture_drag_amount_; 40 41 DISALLOW_COPY_AND_ASSIGN(TrayGestureHandler); 42 }; 43 44 } // namespace ash 45 46 #endif // ASH_WM_GESTURES_TRAY_GESTURE_HANDLER_H_ 47
