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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QDIRECTIONRECOGNIZER_P_H
#define QDIRECTIONRECOGNIZER_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 "qpoint.h"
#include "qlist.h"
QT_BEGIN_NAMESPACE
struct Direction
{
Qt::DirectionType direction;
QPoint point;
Direction(Qt::DirectionType dir, const QPoint &pt)
: direction(dir), point(pt) { }
Direction()
: direction(Qt::NoDirection) { }
inline bool isEmpty() const { return direction == Qt::NoDirection; }
inline bool isNull() const { return direction == Qt::NoDirection; }
};
typedef QList<Direction> DirectionList;
class QDirectionSimpleRecognizer
{
public:
QDirectionSimpleRecognizer();
Direction addPosition(const QPoint &pos);
DirectionList getDirections() const;
void reset();
private:
QPoint lastPoint;
DirectionList directions;
};
class QDirectionDiagonalRecognizer
{
public:
QDirectionDiagonalRecognizer();
Direction addPosition(const QPoint &pos);
DirectionList getDirections() const;
void reset();
private:
QPoint lastPoint;
DirectionList directions;
};
QT_END_NAMESPACE
#endif // QDIRECTIONRECOGNIZER_P_H
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