qt-everywhere-src-5.14.1/qtbase/src/platformsupport/input/evdevmouse/qevdevmousehandler_p.h

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QEVDEVMOUSEHANDLER_P_H
#define QEVDEVMOUSEHANDLER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QObject>
#include <QString>
#include <QPoint>
#include <QEvent>

#include <memory>

QT_BEGIN_NAMESPACE

class QSocketNotifier;

class QEvdevMouseHandler : public QObject
{
    Q_OBJECT
public:
    static std::unique_ptr<QEvdevMouseHandler> create(const QString &device, const QString &specification);
    ~QEvdevMouseHandler();

    void readMouseData();

signals:
    void handleMouseEvent(int x, int y, bool abs, Qt::MouseButtons buttons,
                          Qt::MouseButton button, QEvent::Type type);
    void handleWheelEvent(QPoint delta);

private:
    QEvdevMouseHandler(const QString &device, int fd, bool abs, bool compression, int jitterLimit);

    void sendMouseEvent();
    bool getHardwareMaximum();

    QString m_device;
    int m_fd;
    QSocketNotifier *m_notify;
    int m_x, m_y;
    int m_prevx, m_prevy;
    bool m_abs;
    bool m_compression;
    Qt::MouseButtons m_buttons;
    Qt::MouseButton m_button;
    QEvent::Type m_eventType;
    int m_jitterLimitSquared;
    bool m_prevInvalid;
    int m_hardwareWidth;
    int m_hardwareHeight;
    qreal m_hardwareScalerY;
    qreal m_hardwareScalerX;
};

QT_END_NAMESPACE

#endif // QEVDEVMOUSEHANDLER_P_H