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#ifndef QMLGRAPHICSANCHORS_P_H
#define QMLGRAPHICSANCHORS_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 "qmlgraphicsanchors_p.h"
#include "private/qobject_p.h"

QT_BEGIN_NAMESPACE

class QmlGraphicsAnchorLine
{
public:
    QmlGraphicsAnchorLine() : 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
    };

    QmlGraphicsItem *item;
    AnchorLine anchorLine;

    bool operator==(const QmlGraphicsAnchorLine& other) const
    {
        return item == other.item && anchorLine == other.anchorLine;
    }
};
Q_DECLARE_METATYPE(QmlGraphicsAnchorLine)



class QmlGraphicsAnchorsPrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QmlGraphicsAnchors)
public:
    QmlGraphicsAnchorsPrivate()
      : updatingMe(false), updatingHorizontalAnchor(0),
        updatingVerticalAnchor(0), updatingFill(0), updatingCenterIn(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(QmlGraphicsItem *);

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

    bool updatingMe;
    int updatingHorizontalAnchor;
    int updatingVerticalAnchor;
    int updatingFill;
    int updatingCenterIn;

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

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

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

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

    QmlGraphicsItem *item;
    QmlGraphicsAnchors::UsedAnchors usedAnchors;

    QmlGraphicsItem *fill;
    QmlGraphicsItem *centerIn;

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

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

    bool componentComplete;
};

QT_END_NAMESPACE
#endif