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

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

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** This file is part of the QtDeclarative module of the Qt Toolkit.

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** this package.

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

#ifndef QDECLARATIVEANCHORS_P_H

#define QDECLARATIVEANCHORS_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 "private/qdeclarativeanchors_p.h"

#include "private/qdeclarativeitemchangelistener_p.h"

#include <private/qobject_p.h>

QT_BEGIN_NAMESPACE

class QDeclarativeAnchorLine

{

public:

    QDeclarativeAnchorLine() : item(0), anchorLine(Invalid) {}

    enum AnchorLine {

        Invalid = 0x0,

        Left = 0x01,

        Right = 0x02,

        Top = 0x04,

        Bottom = 0x08,

        HCenter = 0x10,

        VCenter = 0x20,

        Baseline = 0x40,

        Horizontal_Mask = Left | Right | HCenter,

        Vertical_Mask = Top | Bottom | VCenter | Baseline

    };

    QGraphicsObject *item;

    AnchorLine anchorLine;

};

inline bool operator==(const QDeclarativeAnchorLine& a, const QDeclarativeAnchorLine& b)

{

    return a.item == b.item && a.anchorLine == b.anchorLine;

}

class QDeclarativeAnchorsPrivate : public QObjectPrivate, public QDeclarativeItemChangeListener

{

    Q_DECLARE_PUBLIC(QDeclarativeAnchors)

public:

    QDeclarativeAnchorsPrivate(QGraphicsObject *i)

      : componentComplete(true), updatingMe(false), updatingHorizontalAnchor(0),

        updatingVerticalAnchor(0), updatingFill(0), updatingCenterIn(0), item(i), usedAnchors(0), fill(0),

        centerIn(0), leftMargin(0), rightMargin(0), topMargin(0), bottomMargin(0),

        margins(0), vCenterOffset(0), hCenterOffset(0), baselineOffset(0)

    {

    }

    void clearItem(QGraphicsObject *);

    void addDepend(QGraphicsObject *);

    void remDepend(QGraphicsObject *);

    bool isItemComplete() const;

    bool componentComplete:1;

    bool updatingMe:1;

    uint updatingHorizontalAnchor:2;

    uint updatingVerticalAnchor:2;

    uint updatingFill:2;

    uint updatingCenterIn:2;

    void setItemHeight(qreal);

    void setItemWidth(qreal);

    void setItemX(qreal);

    void setItemY(qreal);

    void setItemPos(const QPointF &);

    void setItemSize(const QSizeF &);

    void updateOnComplete();

    void updateMe();

    // QDeclarativeItemGeometryListener interface

    void itemGeometryChanged(QDeclarativeItem *, const QRectF &, const QRectF &);

    void _q_widgetDestroyed(QObject *);

    void _q_widgetGeometryChanged();

    QDeclarativeAnchorsPrivate *anchorPrivate() { return this; }

    bool checkHValid() const;

    bool checkVValid() const;

    bool checkHAnchorValid(QDeclarativeAnchorLine anchor) const;

    bool checkVAnchorValid(QDeclarativeAnchorLine anchor) const;

    bool calcStretch(const QDeclarativeAnchorLine &edge1, const QDeclarativeAnchorLine &edge2, int offset1, int offset2, QDeclarativeAnchorLine::AnchorLine line, int &stretch);

    void updateHorizontalAnchors();

    void updateVerticalAnchors();

    void fillChanged();

    void centerInChanged();

    QGraphicsObject *item;

    QDeclarativeAnchors::Anchors usedAnchors;

    QGraphicsObject *fill;

    QGraphicsObject *centerIn;

    QDeclarativeAnchorLine left;

    QDeclarativeAnchorLine right;

    QDeclarativeAnchorLine top;

    QDeclarativeAnchorLine bottom;

    QDeclarativeAnchorLine vCenter;

    QDeclarativeAnchorLine hCenter;

    QDeclarativeAnchorLine baseline;

    qreal leftMargin;

    qreal rightMargin;

    qreal topMargin;

    qreal bottomMargin;

    qreal margins;

    qreal vCenterOffset;

    qreal hCenterOffset;

    qreal baselineOffset;

};

QT_END_NAMESPACE

Q_DECLARE_METATYPE(QDeclarativeAnchorLine)

#endif