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** This file is part of the QtDeclarative module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
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#include "graphicswidgets.h"

QT_BEGIN_NAMESPACE

//### the single (default) property could alternatively be added to graphics view directly
class QGraphicsViewDeclarativeUI : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QGraphicsScene *scene READ scene WRITE setScene)
    Q_CLASSINFO("DefaultProperty", "scene")
public:
    QGraphicsViewDeclarativeUI(QObject *other) : QObject(other) {}

    QGraphicsScene *scene() const { return static_cast<QGraphicsView *>(parent())->scene(); }
    void setScene(QGraphicsScene *scene)
    {
        static_cast<QGraphicsView *>(parent())->setScene(scene);
    }
};

class QGraphicsSceneDeclarativeUI : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QmlList<QObject *> *children READ children)
    Q_CLASSINFO("DefaultProperty", "children")
public:
    QGraphicsSceneDeclarativeUI(QObject *other) : QObject(other), _children(other) {}

    QmlList<QObject *> *children() { return &_children; }

private:
    class Children : public QmlConcreteList<QObject *>
    {
    public:
        Children(QObject *scene) : q(scene) {}
        virtual void append(QObject *o)
        {
            insert(-1, o);
        }
        virtual void clear()
        {
            for (int i = 0; i < count(); ++i)
                if (QGraphicsWidget *w = qobject_cast<QGraphicsWidget *>(at(i)))
                    static_cast<QGraphicsScene *>(q)->removeItem(w);
            QmlConcreteList<QObject *>::clear();
        }
        virtual void removeAt(int i)
        {
            if (QGraphicsWidget *w = qobject_cast<QGraphicsWidget *>(at(i)))
                static_cast<QGraphicsScene *>(q)->removeItem(w);
            QmlConcreteList<QObject *>::removeAt(i);
        }
        virtual void insert(int i, QObject *o)
        {
            QmlConcreteList<QObject *>::insert(i, o);

            //XXX are there any cases when insertion should be different from appension?
            if (QGraphicsWidget *w = qobject_cast<QGraphicsWidget *>(o))
                static_cast<QGraphicsScene *>(q)->addItem(w);
            //else if (QWidget *w = qobject_cast<QWidget *>(o))
            //    static_cast<QGraphicsScene *>(q)->addWidget(w);
            //else
            //    qWarning() << "Can't add" << o << "to a QGraphicsScene";
        }
    private:
        QObject *q;
    };
    Children _children;
};

class QGraphicsWidgetDeclarativeUI : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QmlList<QObject *> *data READ data)
    Q_PROPERTY(QmlList<QGraphicsItem *> *children READ children)
    Q_PROPERTY(QGraphicsLayout *layout READ layout WRITE setLayout)
    Q_CLASSINFO("DefaultProperty", "children")
public:
    QGraphicsWidgetDeclarativeUI(QObject *other) : QObject(other), _widgets(this) {}

    QmlList<QObject *> *data() { return &_data; }

    QmlList<QGraphicsItem *> *children() { return &_widgets; }

    QGraphicsLayout *layout() const { return static_cast<QGraphicsWidget *>(parent())->layout(); }
    void setLayout(QGraphicsLayout *lo)
    {
        static_cast<QGraphicsWidget *>(parent())->setLayout(lo);
    }

private:
    friend class WidgetList;
    void setItemParent(QGraphicsItem *wid)
    {
        wid->setParentItem(static_cast<QGraphicsWidget *>(parent()));
    }

    //###
    void clearWidget()
    {
    }

    class WidgetList : public QmlConcreteList<QGraphicsItem *>
    {
    public:
        WidgetList(QGraphicsWidgetDeclarativeUI *o)
            : obj(o) {}

        virtual void append(QGraphicsItem *w)  { QmlConcreteList<QGraphicsItem *>::append(w); obj->setItemParent(w); }
        virtual void clear() { QmlConcreteList<QGraphicsItem *>::clear(); obj->clearWidget(); }
        virtual void removeAt(int i) { QmlConcreteList<QGraphicsItem *>::removeAt(i); }     //XXX
        virtual void insert(int i, QGraphicsItem *item) { QmlConcreteList<QGraphicsItem *>::insert(i, item); obj->setItemParent(item); }

    private:
        QGraphicsWidgetDeclarativeUI *obj;
    };
    WidgetList _widgets;
    QmlConcreteList<QObject *> _data;
};

QML_DEFINE_EXTENDED_TYPE(Qt,4,6,(QT_VERSION&0x00ff00)>>8,QGraphicsView,QGraphicsView,QGraphicsViewDeclarativeUI)
QML_DEFINE_EXTENDED_TYPE(Qt,4,6,(QT_VERSION&0x00ff00)>>8,QGraphicsScene,QGraphicsScene,QGraphicsSceneDeclarativeUI)
QML_DEFINE_EXTENDED_TYPE(Qt,4,6,(QT_VERSION&0x00ff00)>>8,QGraphicsWidget,QGraphicsWidget,QGraphicsWidgetDeclarativeUI)

QML_DEFINE_INTERFACE(QGraphicsItem)

QT_END_NAMESPACE

#include "graphicswidgets.moc"