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** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
** This file is part of the demonstration applications of the Qt Toolkit.
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.  In addition, as a special
** exception, Nokia gives you certain additional rights. These rights
** are described in the Nokia Qt GPL Exception version 1.3, included in
** the file GPL_EXCEPTION.txt in this package.
** Qt for Windows(R) Licensees
** As a special exception, Nokia, as the sole copyright holder for Qt
** Designer, grants users of the Qt/Eclipse Integration plug-in the
** right for the Qt/Eclipse Integration to link to functionality
** provided by Qt Designer and its related libraries.
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.


#include <QtGui>


class HoverPoints : public QObject
    enum PointShape {

    enum LockType {
        LockToLeft   = 0x01,
        LockToRight  = 0x02,
        LockToTop    = 0x04,
        LockToBottom = 0x08

    enum SortType {

    enum ConnectionType {

    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); }

    void pointsChanged(const QPolygonF &points);

    void firePointChange();

    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;

    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();
        return m_bounds;


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