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**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtDeclarative module of the Qt Toolkit.

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**     notice, this list of conditions and the following disclaimer in

**     the documentation and/or other materials provided with the

**     distribution.

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****************************************************************************/

#ifndef LINEARLAYOUT_H

#define LINEARLAYOUT_H

#include <qdeclarative.h>

#include <QGraphicsLinearLayout>

#include <QGraphicsLayoutItem>

class GraphicsLinearLayoutStretchItemObject : public QObject, public QGraphicsLayoutItem

{

    Q_OBJECT

    Q_INTERFACES(QGraphicsLayoutItem)

public:

    GraphicsLinearLayoutStretchItemObject(QObject *parent = 0);

    virtual QSizeF sizeHint(Qt::SizeHint, const QSizeF &) const;

};

class LinearLayoutAttached;

class GraphicsLinearLayoutObject : public QObject, public QGraphicsLinearLayout

{

    Q_OBJECT

    Q_INTERFACES(QGraphicsLayout QGraphicsLayoutItem)

    Q_PROPERTY(QDeclarativeListProperty<QGraphicsLayoutItem> children READ children)

    Q_PROPERTY(Qt::Orientation orientation READ orientation WRITE setOrientation)

    Q_PROPERTY(qreal spacing READ spacing WRITE setSpacing)

    Q_PROPERTY(qreal contentsMargin READ contentsMargin WRITE setContentsMargin)

    Q_CLASSINFO("DefaultProperty", "children")

public:

    GraphicsLinearLayoutObject(QObject * = 0);

    ~GraphicsLinearLayoutObject();

    QDeclarativeListProperty<QGraphicsLayoutItem> children() { return QDeclarativeListProperty<QGraphicsLayoutItem>(this, 0, children_append, children_count, children_at, children_clear); }

    qreal contentsMargin() const;

    void setContentsMargin(qreal);

    void removeAt(int index);

    static LinearLayoutAttached *qmlAttachedProperties(QObject *);

private slots:

    void updateStretch(QGraphicsLayoutItem*,int);

    void updateSpacing(QGraphicsLayoutItem*,int);

    void updateAlignment(QGraphicsLayoutItem*,Qt::Alignment);

private:

    friend class LinearLayoutAttached;

    void clearChildren();

    void insertLayoutItem(int, QGraphicsLayoutItem *);

    static void children_append(QDeclarativeListProperty<QGraphicsLayoutItem> *prop, QGraphicsLayoutItem *item) {

        static_cast<GraphicsLinearLayoutObject*>(prop->object)->insertLayoutItem(-1, item);

    }

    static void children_clear(QDeclarativeListProperty<QGraphicsLayoutItem> *prop) {

        static_cast<GraphicsLinearLayoutObject*>(prop->object)->clearChildren();

    }

    static int children_count(QDeclarativeListProperty<QGraphicsLayoutItem> *prop) {

        return static_cast<GraphicsLinearLayoutObject*>(prop->object)->count();

    }

    static QGraphicsLayoutItem *children_at(QDeclarativeListProperty<QGraphicsLayoutItem> *prop, int index) {

        return static_cast<GraphicsLinearLayoutObject*>(prop->object)->itemAt(index);

    }

    static QHash<QGraphicsLayoutItem*, LinearLayoutAttached*> attachedProperties;

};

class LinearLayoutAttached : public QObject

{

    Q_OBJECT

    Q_PROPERTY(int stretchFactor READ stretchFactor WRITE setStretchFactor NOTIFY stretchChanged)

    Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment NOTIFY alignmentChanged)

    Q_PROPERTY(int spacing READ spacing WRITE setSpacing NOTIFY spacingChanged)

public:

    LinearLayoutAttached(QObject *parent);

    int stretchFactor() const { return m_stretch; }

    void setStretchFactor(int f);

    Qt::Alignment alignment() const { return m_alignment; }

    void setAlignment(Qt::Alignment a);

    int spacing() const { return m_spacing; }

    void setSpacing(int s);

signals:

    void stretchChanged(QGraphicsLayoutItem*, int);

    void alignmentChanged(QGraphicsLayoutItem*, Qt::Alignment);

    void spacingChanged(QGraphicsLayoutItem*, int);

private:

    int m_stretch;

    Qt::Alignment m_alignment;

    int m_spacing;

};

QML_DECLARE_INTERFACE(QGraphicsLayoutItem)

QML_DECLARE_INTERFACE(QGraphicsLayout)

QML_DECLARE_TYPE(GraphicsLinearLayoutStretchItemObject)

QML_DECLARE_TYPE(GraphicsLinearLayoutObject)

QML_DECLARE_TYPEINFO(GraphicsLinearLayoutObject, QML_HAS_ATTACHED_PROPERTIES)

#endif