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#ifndef QFXITEM_H
#define QFXITEM_H

#include <QtCore/QObject>
#include <QtScript/qscriptvalue.h>
#include <QtCore/QList>
#include <QtDeclarative/qfxanchors.h>
#include <QtDeclarative/qfxglobal.h>
#include <QtDeclarative/qml.h>
#include <QtDeclarative/qfxscalegrid.h>
#include <QtDeclarative/qmlcomponent.h>
#include <QtDeclarative/qmlstate.h>
#include <QtGui/qgraphicsitem.h>
#include <QtGui/qfont.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class Q_DECLARATIVE_EXPORT QFxContents : public QObject
{
    Q_OBJECT
    Q_PROPERTY(qreal height READ height NOTIFY heightChanged)
    Q_PROPERTY(qreal width READ width NOTIFY widthChanged)
public:
    QFxContents();

    qreal height() const;

    qreal width() const;

    void setItem(QFxItem *item);

public Q_SLOTS:
    void calcHeight();
    void calcWidth();

Q_SIGNALS:
    void heightChanged();
    void widthChanged();

private:
    QFxItem *m_item;
    qreal m_height;
    qreal m_width;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QFxAnchors::UsedAnchors)

class QmlState;
class QmlTransition;
class QFxTransform;
class QFxKeyEvent;
class QFxItemPrivate;
class Q_DECLARATIVE_EXPORT QFxItem : public QGraphicsObject, public QmlParserStatus
{
    Q_OBJECT
    Q_INTERFACES(QmlParserStatus)

    Q_PROPERTY(QFxItem * parent READ itemParent WRITE setItemParent NOTIFY parentChanged DESIGNABLE false FINAL)
    Q_PROPERTY(QString id READ id WRITE setId) // ### remove
    Q_PROPERTY(QmlList<QFxItem *>* children READ children DESIGNABLE false)
    Q_PROPERTY(QmlList<QObject *>* resources READ resources DESIGNABLE false)
    Q_PROPERTY(QFxAnchors * anchors READ anchors DESIGNABLE false CONSTANT FINAL)
    Q_PROPERTY(QmlList<QObject *> *data READ data DESIGNABLE false)
    Q_PROPERTY(QFxContents * contents READ contents DESIGNABLE false CONSTANT FINAL)
    Q_PROPERTY(QmlList<QmlState *>* states READ states DESIGNABLE false)
    Q_PROPERTY(QmlList<QmlTransition *>* transitions READ transitions DESIGNABLE false)
    Q_PROPERTY(QString state READ state WRITE setState NOTIFY stateChanged)
    Q_PROPERTY(QUrl qml READ qml WRITE setQml NOTIFY qmlChanged) // ### name? Move to own class?
    Q_PROPERTY(QFxItem *qmlItem READ qmlItem NOTIFY qmlChanged)  // ### see above
    Q_PROPERTY(qreal width READ width WRITE setWidth NOTIFY widthChanged FINAL)
    Q_PROPERTY(qreal height READ height WRITE setHeight NOTIFY heightChanged FINAL)
    Q_PROPERTY(QFxAnchorLine left READ left CONSTANT FINAL)
    Q_PROPERTY(QFxAnchorLine right READ right CONSTANT FINAL)
    Q_PROPERTY(QFxAnchorLine horizontalCenter READ horizontalCenter CONSTANT FINAL)
    Q_PROPERTY(QFxAnchorLine top READ top CONSTANT FINAL)
    Q_PROPERTY(QFxAnchorLine bottom READ bottom CONSTANT FINAL)
    Q_PROPERTY(QFxAnchorLine verticalCenter READ verticalCenter CONSTANT FINAL)
    Q_PROPERTY(QFxAnchorLine baseline READ baseline CONSTANT FINAL)
    Q_PROPERTY(qreal baselineOffset READ baselineOffset WRITE setBaselineOffset NOTIFY baselineOffsetChanged)
    Q_PROPERTY(qreal rotation READ rotation WRITE setRotation NOTIFY rotationChanged) // ## remove me
    Q_PROPERTY(qreal scale READ scale WRITE setScale NOTIFY scaleChanged) // ### remove me
    Q_PROPERTY(bool clip READ clip WRITE setClip) // ### move to QGI/QGO, NOTIFY
    Q_PROPERTY(bool focus READ hasFocus WRITE setFocus NOTIFY focusChanged FINAL)
    Q_PROPERTY(bool activeFocus READ hasActiveFocus NOTIFY activeFocusChanged FINAL)
    Q_PROPERTY(QList<QFxTransform *>* transform READ transform) // ## QGI/QGO
    Q_PROPERTY(TransformOrigin transformOrigin READ transformOrigin WRITE setTransformOrigin) // ### move to QGI
    Q_ENUMS(TransformOrigin)
    Q_CLASSINFO("DefaultProperty", "data")

    typedef QHash<QString, QFxItem *> QmlChildren; // ###

public:
    enum Option { NoOption = 0x00000000,
                  MouseFilter = 0x00000001,
                  ChildMouseFilter = 0x00000002,
                  HoverEvents = 0x00000004,
                  MouseEvents = 0x00000008,
                  HasContents = 0x00000010,
                  SimpleItem = 0x00000020,
                  IsFocusPanel = 0x00000040,
                  IsFocusRealm = 0x00000080,
                  AcceptsInputMethods = 0x00000100 };
    Q_DECLARE_FLAGS(Options, Option)

    enum TransformOrigin {
        TopLeft, TopCenter, TopRight,
        MiddleLeft, Center, MiddleRight,
        BottomLeft, BottomCenter, BottomRight 
    };

    QFxItem(QFxItem *parent = 0);
    virtual ~QFxItem();

    QFxItem *itemParent() const; // ### remove me
    QFxItem *parentItem() const;
    void setItemParent(QFxItem *parent); // ## setParentItem

    QString id() const; // ### remove me
    void setId(const QString &);

    QmlList<QObject *> *data();
    QmlList<QFxItem *> *children();
    QmlList<QObject *> *resources();

    QFxAnchors *anchors();

    QFxContents *contents();

    bool clip() const;
    void setClip(bool);

    QmlList<QmlState *>* states();
    QmlState *findState(const QString &name) const;

    QmlList<QmlTransition *>* transitions();

    QString state() const;
    void setState(const QString &);

    QFxItem *qmlItem() const;
    QUrl qml() const;
    void setQml(const QUrl &);

    qreal baselineOffset() const;
    void setBaselineOffset(qreal);

    qreal rotation() const;
    void setRotation(qreal);

    qreal scale() const;
    void setScale(qreal);

    QList<QFxTransform *> *transform();

    bool isClassComplete() const;
    bool isComponentComplete() const;

    void updateTransform(); // ### private!

    bool keepMouseGrab() const;
    void setKeepMouseGrab(bool);

    Options options() const;
    void setOptions(Options, bool set = true);

    qreal width() const;
    void setWidth(qreal);
    void setImplicitWidth(qreal);
    bool widthValid() const; // ### better name?
    qreal height() const;
    void setHeight(qreal);
    void setImplicitHeight(qreal);
    bool heightValid() const; // ### better name?

    QPointF scenePos() const; // ### remove me

    TransformOrigin transformOrigin() const;
    void setTransformOrigin(TransformOrigin);
    QPointF transformOriginPoint() const;

    void setParent(QFxItem *);

    QRect itemBoundingRect(); // ### remove me

    void setPaintMargin(qreal margin);
    QRectF boundingRect() const;
    virtual void paintContents(QPainter &);

    QTransform transform() const; // ### remove me
    void setTransform(const QTransform &); // ### remove me

    QFxItem *mouseGrabberItem() const;

    virtual bool hasFocus() const;
    void setFocus(bool);
    bool activeFocusPanel() const;
    void setActiveFocusPanel(bool);

    bool hasActiveFocus() const;

    static QPixmap string(const QString &, const QColor & = Qt::black, const QFont & = QFont()); // ### remove me, make private for now

    QVariant inputMethodQuery(Qt::InputMethodQuery query) const;  //### for KeyProxy

public Q_SLOTS:
    void newChild(const QString &url);

Q_SIGNALS:
    void xChanged();
    void yChanged();
    void widthChanged();
    void heightChanged();
    void baselineOffsetChanged();
    void stateChanged(const QString &);
    void focusChanged();
    void activeFocusChanged();
    void parentChanged();
    void keyPress(QFxKeyEvent *event);
    void keyRelease(QFxKeyEvent *event);
    void rotationChanged();
    void scaleChanged();
    void qmlChanged();
    void newChildCreated(const QString &url, QScriptValue);

protected:
    virtual void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *);
    virtual void childrenChanged();
    virtual bool sceneEventFilter(QGraphicsItem *, QEvent *);
    virtual bool sceneEvent(QEvent *);
    virtual QVariant itemChange(GraphicsItemChange, const QVariant &);
    virtual bool mouseFilter(QGraphicsSceneMouseEvent *);
    virtual void mouseUngrabEvent();

    virtual void transformChanged(const QTransform &);
    virtual void classBegin();
    virtual void classComplete();
    virtual void componentComplete();
    virtual void parentChanged(QFxItem *, QFxItem *);
    virtual void focusChanged(bool);
    virtual void activeFocusChanged(bool);
    virtual void keyPressEvent(QKeyEvent *event);
    virtual void keyReleaseEvent(QKeyEvent *event);
    virtual void geometryChanged(const QRectF &newGeometry, 
                                 const QRectF &oldGeometry);

private Q_SLOTS:
    void doUpdate();
    void qmlLoaded();

protected:
    QFxItem(QFxItemPrivate &dd, QFxItem *parent = 0);

private:
    // ### public?
    QFxAnchorLine left() const;
    QFxAnchorLine right() const;
    QFxAnchorLine horizontalCenter() const;
    QFxAnchorLine top() const;
    QFxAnchorLine bottom() const;
    QFxAnchorLine verticalCenter() const;
    QFxAnchorLine baseline() const;

    // ### move to d-pointer
    void init(QFxItem *parent);
    friend class QmlStatePrivate;
    friend class QFxAnchors;
    Q_DISABLE_COPY(QFxItem)
    Q_DECLARE_PRIVATE_D(QGraphicsItem::d_ptr, QFxItem)
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QFxItem::Options)

// ### move to QGO
template<typename T>
T qobject_cast(QGraphicsItem *item)
{
    if (!item) return 0;
    QObject *o = item->toGraphicsObject();
    return qobject_cast<T>(o);
}

QT_END_NAMESPACE

QML_DECLARE_TYPE(QFxContents)
QML_DECLARE_TYPE(QFxItem)

QT_END_HEADER

#endif // QFXITEM_H