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#ifndef QFXANCHORS_P_H
#define QFXANCHORS_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 "qfxanchors.h"
#include "private/qobject_p.h"

QT_BEGIN_NAMESPACE

class QFxAnchorLine
{
public:
    QFxAnchorLine() : 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
    };

    QFxItem *item;
    AnchorLine anchorLine;
};
Q_DECLARE_METATYPE(QFxAnchorLine)

class QFxAnchorsPrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QFxAnchors)
public:
    QFxAnchorsPrivate()
      : updatingMe(false), updatingHorizontalAnchor(0),
        updatingVerticalAnchor(0), item(0), usedAnchors(0), fill(0),
        centerIn(0), leftMargin(0), rightMargin(0), topMargin(0),
        bottomMargin(0), vCenterOffset(0), hCenterOffset(0), baselineOffset(0),
        componentComplete(true)
    {
    }

    void init()
    {
    }

    void clearItem(QFxItem *);

    void addDepend(QFxItem *);
    void remDepend(QFxItem *);
    bool isItemComplete() const;

    bool updatingMe;
    int updatingHorizontalAnchor;
    int updatingVerticalAnchor;

    void setItemHeight(qreal);
    void setItemWidth(qreal);
    void setItemX(qreal);
    void setItemY(qreal);
    void setItemPos(const QPointF &);

    void updateOnComplete();
    void updateMe();
    void update(QFxItem *, const QRectF &, const QRectF &);

    bool checkHValid() const;
    bool checkVValid() const;
    bool checkHAnchorValid(QFxAnchorLine anchor) const;
    bool checkVAnchorValid(QFxAnchorLine anchor) const;
    bool calcStretch(const QFxAnchorLine &edge1, const QFxAnchorLine &edge2, int offset1, int offset2, QFxAnchorLine::AnchorLine line, int &stretch);

    void updateHorizontalAnchors();
    void updateVerticalAnchors();
    void fillChanged();
    void centerInChanged();

    QFxItem *item;
    QFxAnchors::UsedAnchors usedAnchors;

    QFxItem *fill;
    QFxItem *centerIn;

    QFxAnchorLine left;
    QFxAnchorLine right;
    QFxAnchorLine top;
    QFxAnchorLine bottom;
    QFxAnchorLine vCenter;
    QFxAnchorLine hCenter;
    QFxAnchorLine baseline;

    qreal leftMargin;
    qreal rightMargin;
    qreal topMargin;
    qreal bottomMargin;
    qreal vCenterOffset;
    qreal hCenterOffset;
    qreal baselineOffset;

    bool componentComplete;
};

QT_END_NAMESPACE
#endif