| // Copyright 2016 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_VIEWS_POINTER_WATCHER_H_ |
| #define UI_VIEWS_POINTER_WATCHER_H_ |
| |
| #include "ui/views/views_export.h" |
| |
| namespace gfx { |
| class Point; |
| } |
| |
| namespace ui { |
| class MouseEvent; |
| class TouchEvent; |
| } |
| |
| namespace views { |
| class Widget; |
| |
| // An interface for read-only observation of pointer events (in particular, the |
| // events cannot be marked as handled). Only certain event types are supported. |
| // The |target| is the top-level widget that will receive the event, if any. |
| // NOTE: On mus this allows observation of events outside of windows owned |
| // by the current process, in which case the |target| will be null. On mus |
| // event.target() is always null. |
| class VIEWS_EXPORT PointerWatcher { |
| public: |
| virtual ~PointerWatcher() {} |
| |
| virtual void OnMousePressed(const ui::MouseEvent& event, |
| const gfx::Point& location_in_screen, |
| Widget* target) = 0; |
| virtual void OnTouchPressed(const ui::TouchEvent& event, |
| const gfx::Point& location_in_screen, |
| Widget* target) = 0; |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_POINTER_WATCHER_H_ |