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// Copyright (c) 2006-2008 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_TOUCHPAD_H_
#define CHROME_BROWSER_CHROMEOS_TOUCHPAD_H_
#include <string>
#include "chrome/common/notification_observer.h"
#include "chrome/common/pref_member.h"
class PrefService;
// The Touchpad class handles touchpad preferences. When the class is first
// initialized, it will initialize the touchpad settings to what's stored in the
// preferences. And whenever the preference changes, we change the touchpad
// setting to reflect the new value.
//
// For Synaptics touchpads, we use synclient to change settings on-the-fly.
// See "man synaptics" for a list of settings that can be changed.
// Since we are doing a system call to run the synclient binary, we make sure
// that we are running on the File thread so that we don't block the UI thread.
class Touchpad : public NotificationObserver {
public:
explicit Touchpad() {}
virtual ~Touchpad() {}
// This method will register the prefs associated with touchpad settings.
static void RegisterUserPrefs(PrefService* prefs);
// This method will initialize touchpad settings to values in user prefs.
virtual void Init(PrefService* prefs);
// Overridden from NotificationObserver:
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
protected:
virtual void NotifyPrefChanged(const std::wstring* pref_name);
private:
// This methods makes a system call to synclient to change touchpad settings.
// The system call will be invoked on the file thread.
void SetSynclientParam(const std::string& param, double value);
// Set tap-to-click to value stored in preferences.
void SetTapToClick();
// Set vertical edge scrolling to value stored in preferences.
void SetVertEdgeScroll();
// Set touchpad speed factor to value stored in preferences.
void SetSpeedFactor();
// Set tap sensitivity to value stored in preferences.
void SetSensitivity();
BooleanPrefMember tap_to_click_enabled_;
BooleanPrefMember vert_edge_scroll_enabled_;
IntegerPrefMember speed_factor_;
IntegerPrefMember sensitivity_;
DISALLOW_COPY_AND_ASSIGN(Touchpad);
};
#endif // CHROME_BROWSER_CHROMEOS_TOUCHPAD_H_
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