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 CHROME_BROWSER_UI_PANELS_PANEL_MOUSE_WATCHER_H_ 6 #define CHROME_BROWSER_UI_PANELS_PANEL_MOUSE_WATCHER_H_ 7 8 #include "base/gtest_prod_util.h" 9 #include "base/observer_list.h" 10 11 namespace gfx { 12 class Point; 13 } 14 15 class PanelMouseWatcherObserver; 16 17 // This is the base class for functionality to watch for mouse movements. 18 // The specific implementation of this abstract class differ in how they 19 // track mouse movements. 20 class PanelMouseWatcher { 21 public: 22 // Returns an instance of the platform specific implementation. 23 static PanelMouseWatcher* Create(); 24 25 // clang gives an error asking for an out of line destructor. 26 virtual ~PanelMouseWatcher(); 27 28 void AddObserver(PanelMouseWatcherObserver* observer); 29 void RemoveObserver(PanelMouseWatcherObserver* observer); 30 31 // Returns current mouse position. This may be different from the 32 // mouse position in NotifyMouseMovement. 33 virtual gfx::Point GetMousePosition() const = 0; 34 35 protected: 36 PanelMouseWatcher(); 37 38 // |mouse_position| is in screen coordinates. 39 virtual void NotifyMouseMovement(const gfx::Point& mouse_position); 40 41 // Returns true if watching mouse movements. 42 virtual bool IsActive() const = 0; 43 44 private: 45 friend class PanelMouseWatcherTest; 46 FRIEND_TEST_ALL_PREFIXES(PanelMouseWatcherTest, StartStopWatching); 47 friend class BasePanelBrowserTest; 48 49 // Start/stop tracking mouse movements. 50 virtual void Start() = 0; 51 virtual void Stop() = 0; 52 53 ObserverList<PanelMouseWatcherObserver> observers_; 54 }; 55 56 #endif // CHROME_BROWSER_UI_PANELS_PANEL_MOUSE_WATCHER_H_ 57
