| // Copyright 2014 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_EVENT_MONITOR_H_ |
| #define UI_VIEWS_EVENT_MONITOR_H_ |
| |
| #include <memory> |
| #include <set> |
| |
| #include "ui/events/event_constants.h" |
| #include "ui/events/event_observer.h" |
| #include "ui/gfx/geometry/point.h" |
| #include "ui/gfx/native_widget_types.h" |
| #include "ui/views/views_export.h" |
| |
| namespace views { |
| |
| // RAII-style class that forwards events matching the specified |types| to |
| // |event_observer| before they are dispatched to the intended target. |
| // EventObservers cannot modify events nor alter dispatch. |
| class VIEWS_EXPORT EventMonitor { |
| public: |
| virtual ~EventMonitor() = default; |
| |
| // Create an instance for monitoring application events. This includes all |
| // events on ChromeOS, but only events targeting Chrome on desktop platforms. |
| // |context| is used to determine where to observe events from. |
| // |context| may be destroyed before the EventMonitor. |
| static std::unique_ptr<EventMonitor> CreateApplicationMonitor( |
| ui::EventObserver* event_observer, |
| gfx::NativeWindow context, |
| const std::set<ui::EventType>& types); |
| |
| // Create an instance for monitoring events on a specific window. |
| // The EventMonitor instance must be destroyed before |target_window|. |
| static std::unique_ptr<EventMonitor> CreateWindowMonitor( |
| ui::EventObserver* event_observer, |
| gfx::NativeWindow target_window, |
| const std::set<ui::EventType>& types); |
| |
| // Returns the last recorded mouse event location in screen coordinates. |
| virtual gfx::Point GetLastMouseLocation() = 0; |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_EVENT_MONITOR_H_ |