/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the demonstration applications 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 Technology Preview License Agreement accompanying

** this package.

**

** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef HOVERPOINTS_H

#define HOVERPOINTS_H

#include <QtGui>

QT_FORWARD_DECLARE_CLASS(QBypassWidget)

class HoverPoints : public QObject

{

    Q_OBJECT

public:

    enum PointShape {

        CircleShape,

        RectangleShape

    };

    enum LockType {

        LockToLeft   = 0x01,

        LockToRight  = 0x02,

        LockToTop    = 0x04,

        LockToBottom = 0x08

    };

    enum SortType {

        NoSort,

        XSort,

        YSort

    };

    enum ConnectionType {

        NoConnection,

        LineConnection,

        CurveConnection

    };

    HoverPoints(QWidget *widget, PointShape shape);

    bool eventFilter(QObject *object, QEvent *event);

    void paintPoints();

    inline QRectF boundingRect() const;

    void setBoundingRect(const QRectF &boundingRect) { m_bounds = boundingRect; }

    QPolygonF points() const { return m_points; }

    void setPoints(const QPolygonF &points);

    QSizeF pointSize() const { return m_pointSize; }

    void setPointSize(const QSizeF &size) { m_pointSize = size; }

    SortType sortType() const { return m_sortType; }

    void setSortType(SortType sortType) { m_sortType = sortType; }

    ConnectionType connectionType() const { return m_connectionType; }

    void setConnectionType(ConnectionType connectionType) { m_connectionType = connectionType; }

    void setConnectionPen(const QPen &pen) { m_connectionPen = pen; }

    void setShapePen(const QPen &pen) { m_pointPen = pen; }

    void setShapeBrush(const QBrush &brush) { m_pointBrush = brush; }

    void setPointLock(int pos, LockType lock) { m_locks[pos] = lock; }

    void setEditable(bool editable) { m_editable = editable; }

    bool editable() const { return m_editable; }

public slots:

    void setEnabled(bool enabled);

    void setDisabled(bool disabled) { setEnabled(!disabled); }

signals:

    void pointsChanged(const QPolygonF &points);

public:

    void firePointChange();

private:

    inline QRectF pointBoundingRect(int i) const;

    void movePoint(int i, const QPointF &newPos, bool emitChange = true);

    QWidget *m_widget;

    QPolygonF m_points;

    QRectF m_bounds;

    PointShape m_shape;

    SortType m_sortType;

    ConnectionType m_connectionType;

    QVector<uint> m_locks;

    QSizeF m_pointSize;

    int m_currentIndex;

    bool m_editable;

    bool m_enabled;

    QHash<int, int> m_fingerPointMapping;

    QPen m_pointPen;

    QBrush m_pointBrush;

    QPen m_connectionPen;

};

inline QRectF HoverPoints::pointBoundingRect(int i) const

{

    QPointF p = m_points.at(i);

    qreal w = m_pointSize.width();

    qreal h = m_pointSize.height();

    qreal x = p.x() - w / 2;

    qreal y = p.y() - h / 2;

    return QRectF(x, y, w, h);

}

inline QRectF HoverPoints::boundingRect() const

{

    if (m_bounds.isEmpty())

        return m_widget->rect();

    else

        return m_bounds;

}

#endif // HOVERPOINTS_H