| // Copyright (c) 2012 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_UI_PANELS_PANEL_MOUSE_WATCHER_H_ |
| #define CHROME_BROWSER_UI_PANELS_PANEL_MOUSE_WATCHER_H_ |
| |
| #include "base/gtest_prod_util.h" |
| #include "base/observer_list.h" |
| |
| namespace gfx { |
| class Point; |
| } |
| |
| class PanelMouseWatcherObserver; |
| |
| // This is the base class for functionality to watch for mouse movements. |
| // The specific implementation of this abstract class differ in how they |
| // track mouse movements. |
| class PanelMouseWatcher { |
| public: |
| // Returns an instance of the platform specific implementation. |
| static PanelMouseWatcher* Create(); |
| |
| // clang gives an error asking for an out of line destructor. |
| virtual ~PanelMouseWatcher(); |
| |
| void AddObserver(PanelMouseWatcherObserver* observer); |
| void RemoveObserver(PanelMouseWatcherObserver* observer); |
| |
| // Returns current mouse position. This may be different from the |
| // mouse position in NotifyMouseMovement. |
| virtual gfx::Point GetMousePosition() const = 0; |
| |
| protected: |
| PanelMouseWatcher(); |
| |
| // |mouse_position| is in screen coordinates. |
| virtual void NotifyMouseMovement(const gfx::Point& mouse_position); |
| |
| // Returns true if watching mouse movements. |
| virtual bool IsActive() const = 0; |
| |
| private: |
| friend class PanelMouseWatcherTest; |
| FRIEND_TEST_ALL_PREFIXES(PanelMouseWatcherTest, StartStopWatching); |
| friend class BasePanelBrowserTest; |
| |
| // Start/stop tracking mouse movements. |
| virtual void Start() = 0; |
| virtual void Stop() = 0; |
| |
| ObserverList<PanelMouseWatcherObserver> observers_; |
| }; |
| |
| #endif // CHROME_BROWSER_UI_PANELS_PANEL_MOUSE_WATCHER_H_ |