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

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbWidgets module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

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

#ifndef HBABSTRACTITEMVIEW_H

#define HBABSTRACTITEMVIEW_H

#include <hbscrollarea.h>

#include <hbglobal.h>

#include <hbeffect.h>

#include <QItemSelectionModel>

class HbAbstractItemViewPrivate;

class HbAbstractViewItem;

class HbAbstractViewItemPrivate;

class HbAbstractItemContainer;

class HbModelIterator;

class HB_WIDGETS_EXPORT HbAbstractItemView : public HbScrollArea

{

    Q_OBJECT

    Q_ENUMS(SelectionMode ScrollHint)  

    Q_FLAGS(ItemAnimations)

    Q_PROPERTY(bool itemRecycling READ itemRecycling WRITE setItemRecycling)

    Q_PROPERTY(SelectionMode selectionMode READ selectionMode WRITE setSelectionMode)

    Q_PROPERTY(QString layoutName READ layoutName WRITE setLayoutName)

    Q_PROPERTY(bool uniformItemSizes READ uniformItemSizes WRITE setUniformItemSizes)

    Q_PROPERTY(ItemAnimations enabledAnimations READ enabledAnimations WRITE setEnabledAnimations)

    Q_PROPERTY(bool longPressEnabled  READ longPressEnabled  WRITE setLongPressEnabled )

public:

    enum SelectionMode

    {

        NoSelection,

        SingleSelection,

        MultiSelection

    };

    enum ScrollHint

    {

        EnsureVisible,

        PositionAtTop,

        PositionAtBottom,

        PositionAtCenter

    };

    enum ItemAnimation

    {

        None               = 0x00000,

        Appear             = 0x00001,

        Disappear          = 0x00002,

        TouchDown          = 0x00004,

        Expand             = 0x00008,

        Collapse           = 0x00010,

        All                = 0xFFFFF

    };

    Q_DECLARE_FLAGS(ItemAnimations, ItemAnimation)

public:

    virtual ~HbAbstractItemView();

    virtual void setModel(QAbstractItemModel *model, HbAbstractViewItem *prototype = 0);

    QAbstractItemModel *model() const;

    void setItemPrototype(HbAbstractViewItem *prototype);

    void setItemPrototypes(const QList<HbAbstractViewItem *> &prototypes);

    QList<HbAbstractViewItem *> itemPrototypes() const;

    void setSelectionModel(QItemSelectionModel *selectionModel);

    QItemSelectionModel *selectionModel() const;

    QModelIndex currentIndex() const;

    QModelIndex rootIndex() const;

    void setSelectionMode(SelectionMode newMode);

    SelectionMode selectionMode() const;

    void setItemRecycling(bool enabled);

    bool itemRecycling() const;

    using HbScrollArea::isVisible;

    bool isVisible(const QModelIndex &index) const;

    HbAbstractViewItem *currentViewItem() const;

    HbAbstractViewItem *itemByIndex(const QModelIndex &index) const;

    virtual void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) = 0;

    QList<HbAbstractViewItem *> visibleItems() const;

    QString layoutName() const;

    void setLayoutName(const QString &layoutName);

    void setUniformItemSizes(bool enable);

    bool uniformItemSizes() const;

    HbModelIterator *modelIterator() const;

    void setEnabledAnimations(ItemAnimations flags);

    ItemAnimations enabledAnimations() const;

    void setLongPressEnabled(bool enabled);

    bool longPressEnabled() const;

public slots:

    void setCurrentIndex(const QModelIndex &index,

                         QItemSelectionModel::SelectionFlags selectionFlag

                         = QItemSelectionModel::NoUpdate);

    virtual void setRootIndex(const QModelIndex &index);

    virtual void reset();

    virtual void selectAll();

    virtual void clearSelection();

signals:

    void pressed(const QModelIndex &index);

    void released(const QModelIndex &index);

    void activated(const QModelIndex &index);

    void longPressed(HbAbstractViewItem *item, const QPointF &coords);

protected:

    HbAbstractItemView(HbAbstractItemViewPrivate &dd,

                       HbAbstractItemContainer *container,

                       HbModelIterator *modelIterator,

                       QGraphicsItem *parent = 0);

    HbAbstractItemView(HbAbstractItemContainer *container,

                       HbModelIterator *modelIterator,

                       QGraphicsItem *parent = 0);

    virtual QItemSelectionModel::SelectionFlags selectionCommand( 

                                                    const HbAbstractViewItem *item, 

                                                    const QEvent *event);

    bool event(QEvent *e);

    void gestureEvent(QGestureEvent *event);

    virtual void emitActivated(const QModelIndex &modelIndex);

    virtual void emitPressed(const QModelIndex &modelIndex);

    virtual void emitReleased(const QModelIndex &modelIndex);

    virtual bool scrollByAmount(const QPointF &delta);

    QVariant itemChange(GraphicsItemChange change, const QVariant &value);

    bool sceneEventFilter(QGraphicsItem *watched, QEvent *event);

protected slots:

    virtual void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);

    virtual void orientationChanged(Qt::Orientation newOrientation);

    virtual void orientationAboutToBeChanged();

    virtual void currentIndexChanged(const QModelIndex &current, const QModelIndex &previous);

    virtual void currentSelectionChanged(const QItemSelection &selected, const QItemSelection &deselected);

    virtual void rowsAboutToBeInserted(const QModelIndex &index, int start, int end);

    virtual void rowsInserted(const QModelIndex &parent, int start, int end);

    virtual void rowsAboutToBeRemoved(const QModelIndex &index, int start, int end);

    virtual void rowsRemoved(const QModelIndex &parent, int start, int end);

    virtual void columnsAboutToBeInserted(const QModelIndex &index, int start, int end);

    virtual void columnsInserted(const QModelIndex &parent, int start, int end);

    virtual void columnsAboutToBeRemoved(const QModelIndex &index, int start, int end);

    virtual void columnsRemoved(const QModelIndex &parent, int start, int end);

    virtual void itemPressed(const QPointF &pos);

    virtual void itemReleased(const QPointF &pos);

    virtual void itemActivated(const QPointF &pos);

    virtual void itemLongPressed(const QPointF &pos);

    virtual void itemCreated(HbAbstractViewItem *item);

    virtual void modelLayoutChanged();

private:

    Q_DECLARE_PRIVATE_D(d_ptr, HbAbstractItemView)

    Q_DISABLE_COPY(HbAbstractItemView)

    Q_PRIVATE_SLOT(d_func(), void _q_modelDestroyed())

    Q_PRIVATE_SLOT(d_func(), void _q_animationEnabled())

    Q_PRIVATE_SLOT(d_func(), void _q_animationFinished(const HbEffect::EffectStatus &status))

    Q_PRIVATE_SLOT(d_func(), void _q_scrolling(QPointF newPosition))

    Q_PRIVATE_SLOT(d_func(), void _q_scrollingEnded())

    Q_PRIVATE_SLOT(d_func(), void _q_scrollingStarted())

    friend class HbAbstractItemContainer;

    friend class HbAbstractViewItemPrivate;

};

Q_DECLARE_METATYPE(HbAbstractItemView::SelectionMode)

Q_DECLARE_OPERATORS_FOR_FLAGS(HbAbstractItemView::ItemAnimations)

#endif // HBABSTRACTITEMVIEW_H