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** This file is part of the QtDeclarative module of the Qt Toolkit.
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#ifndef QFXANCHORS_H
#define QFXANCHORS_H

#include <qfxglobal.h>
#include <QObject>
#include <qml.h>


QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)
class QFxItem;
class QFxAnchorsPrivate;

class QFxAnchorLine
{
public:
    QFxAnchorLine() : item(0), anchorLine(Left)
    {
    }

    enum AnchorLine {
        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 Q_DECLARATIVE_EXPORT QFxAnchors : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QFxAnchorLine left READ left WRITE setLeft RESET resetLeft);
    Q_PROPERTY(QFxAnchorLine right READ right WRITE setRight RESET resetRight);
    Q_PROPERTY(QFxAnchorLine horizontalCenter READ horizontalCenter WRITE setHorizontalCenter RESET resetHorizontalCenter);
    Q_PROPERTY(QFxAnchorLine top READ top WRITE setTop RESET resetTop);
    Q_PROPERTY(QFxAnchorLine bottom READ bottom WRITE setBottom RESET resetBottom);
    Q_PROPERTY(QFxAnchorLine verticalCenter READ verticalCenter WRITE setVerticalCenter RESET resetVerticalCenter);
    Q_PROPERTY(int leftMargin READ leftMargin WRITE setLeftMargin NOTIFY leftMarginChanged);
    Q_PROPERTY(int rightMargin READ rightMargin WRITE setRightMargin NOTIFY rightMarginChanged);
    Q_PROPERTY(int horizontalCenterOffset READ horizontalCenterOffset WRITE setHorizontalCenterOffset NOTIFY horizontalCenterOffsetChanged());
    Q_PROPERTY(int topMargin READ topMargin WRITE setTopMargin NOTIFY topMarginChanged);
    Q_PROPERTY(int bottomMargin READ bottomMargin WRITE setBottomMargin NOTIFY bottomMarginChanged);
    Q_PROPERTY(int verticalCenterOffset READ verticalCenterOffset WRITE setVerticalCenterOffset NOTIFY verticalCenterOffsetChanged());
    Q_PROPERTY(QFxItem *fill READ fill WRITE setFill);
    Q_PROPERTY(QFxItem *centeredIn READ centeredIn WRITE setCenteredIn);

public:
    QFxAnchors(QObject *parent=0);

    enum UsedAnchor { 
        HasLeftAnchor = 0x01,
        HasRightAnchor = 0x02,
        HasTopAnchor = 0x04,
        HasBottomAnchor = 0x08,
        HasHCenterAnchor = 0x10,
        HasVCenterAnchor = 0x20,
        HasBaselineAnchor = 0x40,
        Horizontal_Mask = HasLeftAnchor | HasRightAnchor | HasHCenterAnchor,
        Vertical_Mask = HasTopAnchor | HasBottomAnchor | HasVCenterAnchor | HasBaselineAnchor
    };
    Q_DECLARE_FLAGS(UsedAnchors, UsedAnchor);

    QFxAnchorLine left() const;
    void setLeft(const QFxAnchorLine &edge);
    Q_INVOKABLE void resetLeft();   //### temporarily invokable for testing

    QFxAnchorLine right() const;
    void setRight(const QFxAnchorLine &edge);
    void resetRight();

    QFxAnchorLine horizontalCenter() const;
    void setHorizontalCenter(const QFxAnchorLine &edge);
    void resetHorizontalCenter();

    QFxAnchorLine top() const;
    void setTop(const QFxAnchorLine &edge);
    void resetTop();

    QFxAnchorLine bottom() const;
    void setBottom(const QFxAnchorLine &edge);
    void resetBottom();

    QFxAnchorLine verticalCenter() const;
    void setVerticalCenter(const QFxAnchorLine &edge);
    void resetVerticalCenter();

    int leftMargin() const;
    void setLeftMargin(int);

    int rightMargin() const;
    void setRightMargin(int);

    int horizontalCenterOffset() const;
    void setHorizontalCenterOffset(int);

    int topMargin() const;
    void setTopMargin(int);

    int bottomMargin() const;
    void setBottomMargin(int);

    int verticalCenterOffset() const;
    void setVerticalCenterOffset(int);

    QFxItem *fill() const;
    void setFill(QFxItem *);

    QFxItem *centeredIn() const;
    void setCenteredIn(QFxItem *);

    UsedAnchors usedAnchors() const;

    void setItem(QFxItem *item);

    void connectHAnchors();
    void connectVAnchors();

Q_SIGNALS:
    void leftMarginChanged();
    void rightMarginChanged();
    void topMarginChanged();
    void bottomMarginChanged();
    void verticalCenterOffsetChanged();
    void horizontalCenterOffsetChanged();

private Q_SLOTS:
    void fillChanged();
    void updateHorizontalAnchors();
    void updateVerticalAnchors();

private:
    //### should item be a friend? (and make some of the public methods private or protected)
    Q_DISABLE_COPY(QFxAnchors)
    Q_DECLARE_PRIVATE(QFxAnchors)
};

QML_DECLARE_TYPE(QFxAnchors);


QT_END_NAMESPACE

QT_END_HEADER
#endif