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

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

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

#ifndef QDECLARATIVEGRIDVIEW_H

#define QDECLARATIVEGRIDVIEW_H

#include "private/qdeclarativeflickable_p.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class QDeclarativeVisualModel;

class QDeclarativeGridViewAttached;

class QDeclarativeGridViewPrivate;

class Q_DECLARATIVE_EXPORT QDeclarativeGridView : public QDeclarativeFlickable

{

    Q_OBJECT

    Q_DECLARE_PRIVATE_D(QGraphicsItem::d_ptr.data(), QDeclarativeGridView)

    Q_PROPERTY(QVariant model READ model WRITE setModel NOTIFY modelChanged)

    Q_PROPERTY(QDeclarativeComponent *delegate READ delegate WRITE setDelegate NOTIFY delegateChanged)

    Q_PROPERTY(int currentIndex READ currentIndex WRITE setCurrentIndex NOTIFY currentIndexChanged)

    Q_PROPERTY(QDeclarativeItem *currentItem READ currentItem NOTIFY currentIndexChanged)

    Q_PROPERTY(int count READ count NOTIFY countChanged)

    Q_PROPERTY(QDeclarativeComponent *highlight READ highlight WRITE setHighlight NOTIFY highlightChanged)

    Q_PROPERTY(QDeclarativeItem *highlightItem READ highlightItem NOTIFY highlightItemChanged)

    Q_PROPERTY(bool highlightFollowsCurrentItem READ highlightFollowsCurrentItem WRITE setHighlightFollowsCurrentItem)

    Q_PROPERTY(int highlightMoveDuration READ highlightMoveDuration WRITE setHighlightMoveDuration NOTIFY highlightMoveDurationChanged)

    Q_PROPERTY(qreal preferredHighlightBegin READ preferredHighlightBegin WRITE setPreferredHighlightBegin NOTIFY preferredHighlightBeginChanged)

    Q_PROPERTY(qreal preferredHighlightEnd READ preferredHighlightEnd WRITE setPreferredHighlightEnd NOTIFY preferredHighlightEndChanged)

    Q_PROPERTY(HighlightRangeMode highlightRangeMode READ highlightRangeMode WRITE setHighlightRangeMode NOTIFY highlightRangeModeChanged)

    Q_PROPERTY(Flow flow READ flow WRITE setFlow NOTIFY flowChanged)

    Q_PROPERTY(bool keyNavigationWraps READ isWrapEnabled WRITE setWrapEnabled NOTIFY keyNavigationWrapsChanged)

    Q_PROPERTY(int cacheBuffer READ cacheBuffer WRITE setCacheBuffer NOTIFY cacheBufferChanged)

    Q_PROPERTY(int cellWidth READ cellWidth WRITE setCellWidth NOTIFY cellWidthChanged)

    Q_PROPERTY(int cellHeight READ cellHeight WRITE setCellHeight NOTIFY cellHeightChanged)

    Q_PROPERTY(SnapMode snapMode READ snapMode WRITE setSnapMode NOTIFY snapModeChanged)

    Q_ENUMS(HighlightRangeMode)

    Q_ENUMS(SnapMode)

    Q_ENUMS(Flow)

    Q_ENUMS(PositionMode)

    Q_CLASSINFO("DefaultProperty", "data")

public:

    QDeclarativeGridView(QDeclarativeItem *parent=0);

    ~QDeclarativeGridView();

    QVariant model() const;

    void setModel(const QVariant &);

    QDeclarativeComponent *delegate() const;

    void setDelegate(QDeclarativeComponent *);

    int currentIndex() const;

    void setCurrentIndex(int idx);

    QDeclarativeItem *currentItem();

    QDeclarativeItem *highlightItem();

    int count() const;

    QDeclarativeComponent *highlight() const;

    void setHighlight(QDeclarativeComponent *highlight);

    bool highlightFollowsCurrentItem() const;

    void setHighlightFollowsCurrentItem(bool);

    int highlightMoveDuration() const;

    void setHighlightMoveDuration(int);

    enum HighlightRangeMode { NoHighlightRange, ApplyRange, StrictlyEnforceRange };

    HighlightRangeMode highlightRangeMode() const;

    void setHighlightRangeMode(HighlightRangeMode mode);

    qreal preferredHighlightBegin() const;

    void setPreferredHighlightBegin(qreal);

    qreal preferredHighlightEnd() const;

    void setPreferredHighlightEnd(qreal);

    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);

    enum SnapMode { NoSnap, SnapToRow, SnapOneRow };

    SnapMode snapMode() const;

    void setSnapMode(SnapMode mode);

    enum PositionMode { Beginning, Center, End, Visible, Contain };

    Q_INVOKABLE void positionViewAtIndex(int index, int mode);

    Q_INVOKABLE int indexAt(int x, int y) const;

    static QDeclarativeGridViewAttached *qmlAttachedProperties(QObject *);

public Q_SLOTS:

    void moveCurrentIndexUp();

    void moveCurrentIndexDown();

    void moveCurrentIndexLeft();

    void moveCurrentIndexRight();

Q_SIGNALS:

    void countChanged();

    void currentIndexChanged();

    void cellWidthChanged();

    void cellHeightChanged();

    void highlightChanged();

    void highlightItemChanged();

    void preferredHighlightBeginChanged();

    void preferredHighlightEndChanged();

    void highlightRangeModeChanged();

    void highlightMoveDurationChanged();

    void modelChanged();

    void delegateChanged();

    void flowChanged();

    void keyNavigationWrapsChanged();

    void cacheBufferChanged();

    void snapModeChanged();

protected:

    virtual bool event(QEvent *event);

    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 componentComplete();

private Q_SLOTS:

    void trackedPositionChanged();

    void itemsInserted(int index, int count);

    void itemsRemoved(int index, int count);

    void itemsMoved(int from, int to, int count);

    void modelReset();

    void destroyRemoved();

    void createdItem(int index, QDeclarativeItem *item);

    void destroyingItem(QDeclarativeItem *item);

    void animStopped();

private:

    void refill();

};

class QDeclarativeGridViewAttached : public QObject

{

    Q_OBJECT

public:

    QDeclarativeGridViewAttached(QObject *parent)

        : QObject(parent), m_view(0), m_isCurrent(false), m_delayRemove(false) {}

    ~QDeclarativeGridViewAttached() {}

    Q_PROPERTY(QDeclarativeGridView *view READ view CONSTANT)

    QDeclarativeGridView *view() { return m_view; }

    Q_PROPERTY(bool isCurrentItem READ isCurrentItem NOTIFY currentItemChanged)

    bool isCurrentItem() const { return m_isCurrent; }

    void setIsCurrentItem(bool c) {

        if (m_isCurrent != c) {

            m_isCurrent = c;

            emit currentItemChanged();

        }

    }

    Q_PROPERTY(bool delayRemove READ delayRemove WRITE setDelayRemove NOTIFY delayRemoveChanged)

    bool delayRemove() const { return m_delayRemove; }

    void setDelayRemove(bool delay) {

        if (m_delayRemove != delay) {

            m_delayRemove = delay;

            emit delayRemoveChanged();

        }

    }

    void emitAdd() { emit add(); }

    void emitRemove() { emit remove(); }

Q_SIGNALS:

    void currentItemChanged();

    void delayRemoveChanged();

    void add();

    void remove();

public:

    QDeclarativeGridView *m_view;

    bool m_isCurrent : 1;

    bool m_delayRemove : 1;

};

QT_END_NAMESPACE

QML_DECLARE_TYPE(QDeclarativeGridView)

QML_DECLARE_TYPEINFO(QDeclarativeGridView, QML_HAS_ATTACHED_PROPERTIES)

QT_END_HEADER

#endif