/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QFXGRIDVIEW_H
#define QFXGRIDVIEW_H

#include <QtDeclarative/qfxflickable.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)
class QFxVisualItemModel;
class QFxGridViewPrivate;
class Q_DECLARATIVE_EXPORT QFxGridView : public QFxFlickable
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QFxGridView);

    Q_PROPERTY(QVariant model READ model WRITE setModel);
    Q_CLASSINFO("DefaultProperty", "delegate");
    Q_PROPERTY(QmlComponent *delegate READ delegate WRITE setDelegate);
    Q_PROPERTY(int currentIndex READ currentIndex WRITE setCurrentIndex NOTIFY currentIndexChanged);
    Q_PROPERTY(QFxItem *current READ currentItem NOTIFY currentIndexChanged);
    Q_PROPERTY(int count READ count NOTIFY countChanged);
    Q_PROPERTY(QmlComponent *highlight READ highlight WRITE setHighlight);
    Q_PROPERTY(bool autoHighlight READ autoHighlight WRITE setAutoHighlight);
    Q_PROPERTY(Flow flow READ flow WRITE setFlow);
    Q_PROPERTY(bool wrap READ isWrapEnabled WRITE setWrapEnabled);
    Q_PROPERTY(int cacheBuffer READ cacheBuffer WRITE setCacheBuffer);
    Q_PROPERTY(int cellWidth READ cellWidth WRITE setCellWidth NOTIFY cellSizeChanged);
    Q_PROPERTY(int cellHeight READ cellHeight WRITE setCellHeight NOTIFY cellSizeChanged);

public:
    QFxGridView(QFxItem *parent=0);
    ~QFxGridView();

    QVariant model() const;
    void setModel(const QVariant &);

    QmlComponent *delegate() const;
    void setDelegate(QmlComponent *);

    int currentIndex() const;
    void setCurrentIndex(int idx);

    QFxItem *currentItem();
    int count() const;

    QmlComponent *highlight() const;
    void setHighlight(QmlComponent *highlight);

    bool autoHighlight() const;
    void setAutoHighlight(bool);

    Q_ENUMS(Flow);
    enum Flow { LeftToRight, TopToBottom };
    Flow flow() const;
    void setFlow(Flow);

    bool isWrapEnabled() const;
    void setWrapEnabled(bool);

    int cacheBuffer() const;
    void setCacheBuffer(int);

    int cellWidth() const;
    void setCellWidth(int);

    int cellHeight() const;
    void setCellHeight(int);

    static QObject *qmlAttachedProperties(QObject *);

Q_SIGNALS:
    void countChanged();
    void currentIndexChanged();
    void cellSizeChanged();

protected:
    virtual void viewportMoved();
    virtual qreal minYExtent() const;
    virtual qreal maxYExtent() const;
    virtual qreal minXExtent() const;
    virtual qreal maxXExtent() const;
    virtual void keyPressEvent(QKeyEvent *);
    virtual void keyReleaseEvent(QKeyEvent *);
    virtual void componentComplete();

private Q_SLOTS:
    void trackedPositionChanged();
    void itemsInserted(int index, int count);
    void itemsRemoved(int index, int count);
    void destroyRemoved();
    void createdItem(int index, QFxItem *item);
    void destroyingItem(QFxItem *item);
    void sizeChange();

private:
    void refill();
};

QML_DECLARE_TYPE(QFxGridView);

QT_END_NAMESPACE

QT_END_HEADER

#endif