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// Copyright 2014 The Chromium Authors
// 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_observer.h"
#include "ui/events/types/event_type.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_
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