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// Copyright 2013 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_CHROMEOS_DEVICE_UMA_H_
#define CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_
#include "base/basictypes.h"
#include "base/event_types.h"
#include "base/message_loop/message_loop.h"
template <typename T> struct DefaultSingletonTraits;
namespace chromeos {
// A class to record devices' input event details via the UMA system
class DeviceUMA : public base::MessageLoopForUI::Observer {
public:
// Getting instance starts the class automatically if it hasn't been
// started before.
static DeviceUMA* GetInstance();
void Stop();
private:
friend struct DefaultSingletonTraits<DeviceUMA>;
DeviceUMA();
virtual ~DeviceUMA();
// Start and stop observing events.
void AddMessageLoopObserver();
void RemoveMessageLoopObserver();
// MessageLoopForUI::Observer overrides.
virtual base::EventStatus WillProcessEvent(
const base::NativeEvent& event) OVERRIDE;
virtual void DidProcessEvent(const base::NativeEvent& event) OVERRIDE;
// Check CrOS touchpad events to see if the metrics gesture is present
void CheckTouchpadEvent(const base::NativeEvent& event);
// Check the incoming events for interesting patterns that we care about.
void CheckIncomingEvent(const base::NativeEvent& event);
bool is_observing_;
DISALLOW_COPY_AND_ASSIGN(DeviceUMA);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_
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