QAbstractItemModel

Header: #include
qmake: QT += core Inherits: QObject Inherited By: QAbstractListModel, QAbstractProxyModel, QAbstractTableModel, QConcatenateTablesProxyModel, QDirModel, QFileSystemModel, and QStandardItemModel

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#ifndef QABSTRACTITEMMODEL_H
#define QABSTRACTITEMMODEL_H

#include <QtCore/qvariant.h>
#include <QtCore/qobject.h>
#include <QtCore/qhash.h>
#include <QtCore/qvector.h>

QT_REQUIRE_CONFIG(itemmodel);

QT_BEGIN_NAMESPACE


class QAbstractItemModel;
class QPersistentModelIndex;

class Q_CORE_EXPORT QModelIndex
{
friend class QAbstractItemModel;
public:
Q_DECL_CONSTEXPR inline QModelIndex() noexcept : r(-1), c(-1), i(0), m(nullptr) {}
// compiler-generated copy/move ctors/assignment operators are fine!
Q_DECL_CONSTEXPR inline int row() const noexcept { return r; }
Q_DECL_CONSTEXPR inline int column() const noexcept { return c; }
Q_DECL_CONSTEXPR inline quintptr internalId() const noexcept { return i; }
inline void *internalPointer() const noexcept { return reinterpret_cast<void*>(i); }
inline QModelIndex parent() const;
inline QModelIndex sibling(int row, int column) const;
inline QModelIndex siblingAtColumn(int column) const;
inline QModelIndex siblingAtRow(int row) const;
#if QT_DEPRECATED_SINCE(5, 8)
QT_DEPRECATED_X("Use QAbstractItemModel::index") inline QModelIndex child(int row, int column) const;
#endif
inline QVariant data(int role = Qt::DisplayRole) const;
inline Qt::ItemFlags flags() const;
Q_DECL_CONSTEXPR inline const QAbstractItemModel *model() const noexcept { return m; }
Q_DECL_CONSTEXPR inline bool isValid() const noexcept { return (r >= 0) && (c >= 0) && (m != nullptr); }
Q_DECL_CONSTEXPR inline bool operator==(const QModelIndex &other) const noexcept
{ return (other.r == r) && (other.i == i) && (other.c == c) && (other.m == m); }
Q_DECL_CONSTEXPR inline bool operator!=(const QModelIndex &other) const noexcept
{ return !(*this == other); }
Q_DECL_CONSTEXPR inline bool operator<(const QModelIndex &other) const noexcept
{
return r < other.r
|| (r == other.r && (c < other.c
|| (c == other.c && (i < other.i
|| (i == other.i && std::less<const QAbstractItemModel *>()(m, other.m))))));
}
private:
inline QModelIndex(int arow, int acolumn, void *ptr, const QAbstractItemModel *amodel) noexcept
: r(arow), c(acolumn), i(reinterpret_cast<quintptr>(ptr)), m(amodel) {}
Q_DECL_CONSTEXPR inline QModelIndex(int arow, int acolumn, quintptr id, const QAbstractItemModel *amodel) noexcept
: r(arow), c(acolumn), i(id), m(amodel) {}
int r, c;
quintptr i;
const QAbstractItemModel *m;
};
Q_DECLARE_TYPEINFO(QModelIndex, Q_MOVABLE_TYPE);

#ifndef QT_NO_DEBUG_STREAM
Q_CORE_EXPORT QDebug operator<<(QDebug, const QModelIndex &);
#endif

class QPersistentModelIndexData;

// qHash is a friend, but we can't use default arguments for friends (§8.3.6.4)
uint qHash(const QPersistentModelIndex &index, uint seed = 0) noexcept;

class Q_CORE_EXPORT QPersistentModelIndex
{
public:
QPersistentModelIndex();
QPersistentModelIndex(const QModelIndex &index);
QPersistentModelIndex(const QPersistentModelIndex &other);
~QPersistentModelIndex();
bool operator<(const QPersistentModelIndex &other) const;
bool operator==(const QPersistentModelIndex &other) const;
inline bool operator!=(const QPersistentModelIndex &other) const
{ return !operator==(other); }
QPersistentModelIndex &operator=(const QPersistentModelIndex &other);
inline QPersistentModelIndex(QPersistentModelIndex &&other) noexcept
: d(other.d) { other.d = nullptr; }
inline QPersistentModelIndex &operator=(QPersistentModelIndex &&other) noexcept
{ qSwap(d, other.d); return *this; }
inline void swap(QPersistentModelIndex &other) noexcept { qSwap(d, other.d); }
bool operator==(const QModelIndex &other) const;
bool operator!=(const QModelIndex &other) const;
QPersistentModelIndex &operator=(const QModelIndex &other);
operator const QModelIndex&() const;
int row() const;
int column() const;
void *internalPointer() const;
quintptr internalId() const;
QModelIndex parent() const;
QModelIndex sibling(int row, int column) const;
#if QT_DEPRECATED_SINCE(5, 8)
QT_DEPRECATED_X("Use QAbstractItemModel::index") QModelIndex child(int row, int column) const;
#endif
QVariant data(int role = Qt::DisplayRole) const;
Qt::ItemFlags flags() const;
const QAbstractItemModel *model() const;
bool isValid() const;
private:
QPersistentModelIndexData *d;
friend uint qHash(const QPersistentModelIndex &, uint seed) noexcept;
#ifndef QT_NO_DEBUG_STREAM
friend Q_CORE_EXPORT QDebug operator<<(QDebug, const QPersistentModelIndex &);
#endif
};
Q_DECLARE_SHARED(QPersistentModelIndex)

inline uint qHash(const QPersistentModelIndex &index, uint seed) noexcept
{ return qHash(index.d, seed); }


#ifndef QT_NO_DEBUG_STREAM
Q_CORE_EXPORT QDebug operator<<(QDebug, const QPersistentModelIndex &);
#endif

template<typename T> class QList;
typedef QList<QModelIndex> QModelIndexList;

class QMimeData;
class QAbstractItemModelPrivate;
class QTransposeProxyModelPrivate;
template <class Key, class T> class QMap;


class Q_CORE_EXPORT QAbstractItemModel : public QObject
{
Q_OBJECT

friend class QPersistentModelIndexData;
friend class QAbstractItemViewPrivate;
friend class QIdentityProxyModel;
friend class QTransposeProxyModelPrivate;
public:

explicit QAbstractItemModel(QObject *parent = nullptr);
virtual ~QAbstractItemModel();

Q_INVOKABLE bool hasIndex(int row, int column, const QModelIndex &parent = QModelIndex()) const;
Q_INVOKABLE virtual QModelIndex index(int row, int column,
const QModelIndex &parent = QModelIndex()) const = 0;
Q_INVOKABLE virtual QModelIndex parent(const QModelIndex &child) const = 0;

Q_INVOKABLE virtual QModelIndex sibling(int row, int column, const QModelIndex &idx) const;
Q_INVOKABLE virtual int rowCount(const QModelIndex &parent = QModelIndex()) const = 0;
Q_INVOKABLE virtual int columnCount(const QModelIndex &parent = QModelIndex()) const = 0;
Q_INVOKABLE virtual bool hasChildren(const QModelIndex &parent = QModelIndex()) const;

Q_INVOKABLE virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const = 0;
Q_INVOKABLE virtual bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);

Q_INVOKABLE virtual QVariant headerData(int section, Qt::Orientation orientation,
int role = Qt::DisplayRole) const;
virtual bool setHeaderData(int section, Qt::Orientation orientation, const QVariant &value,
int role = Qt::EditRole);

virtual QMap<int, QVariant> itemData(const QModelIndex &index) const;
virtual bool setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles);
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
virtual bool clearItemData(const QModelIndex &index);
#endif

virtual QStringList mimeTypes() const;
virtual QMimeData *mimeData(const QModelIndexList &indexes) const;
virtual bool canDropMimeData(const QMimeData *data, Qt::DropAction action,
int row, int column, const QModelIndex &parent) const;
virtual bool dropMimeData(const QMimeData *data, Qt::DropAction action,
int row, int column, const QModelIndex &parent);
virtual Qt::DropActions supportedDropActions() const;

virtual Qt::DropActions supportedDragActions() const;
#if QT_DEPRECATED_SINCE(5, 0)
QT_DEPRECATED void setSupportedDragActions(Qt::DropActions actions)
{ doSetSupportedDragActions(actions); }
#endif

virtual bool insertRows(int row, int count, const QModelIndex &parent = QModelIndex());
virtual bool insertColumns(int column, int count, const QModelIndex &parent = QModelIndex());
virtual bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
virtual bool removeColumns(int column, int count, const QModelIndex &parent = QModelIndex());
virtual bool moveRows(const QModelIndex &sourceParent, int sourceRow, int count,
const QModelIndex &destinationParent, int destinationChild);
virtual bool moveColumns(const QModelIndex &sourceParent, int sourceColumn, int count,
const QModelIndex &destinationParent, int destinationChild);

inline bool insertRow(int row, const QModelIndex &parent = QModelIndex());
inline bool insertColumn(int column, const QModelIndex &parent = QModelIndex());
inline bool removeRow(int row, const QModelIndex &parent = QModelIndex());
inline bool removeColumn(int column, const QModelIndex &parent = QModelIndex());
inline bool moveRow(const QModelIndex &sourceParent, int sourceRow,
const QModelIndex &destinationParent, int destinationChild);
inline bool moveColumn(const QModelIndex &sourceParent, int sourceColumn,
const QModelIndex &destinationParent, int destinationChild);

Q_INVOKABLE virtual void fetchMore(const QModelIndex &parent);
Q_INVOKABLE virtual bool canFetchMore(const QModelIndex &parent) const;
Q_INVOKABLE virtual Qt::ItemFlags flags(const QModelIndex &index) const;
virtual void sort(int column, Qt::SortOrder order = Qt::AscendingOrder);
virtual QModelIndex buddy(const QModelIndex &index) const;
Q_INVOKABLE virtual QModelIndexList match(const QModelIndex &start, int role,
const QVariant &value, int hits = 1,
Qt::MatchFlags flags =
Qt::MatchFlags(Qt::MatchStartsWith|Qt::MatchWrap)) const;
virtual QSize span(const QModelIndex &index) const;

virtual QHash<int,QByteArray> roleNames() const;

using QObject::parent;

enum LayoutChangeHint
{
NoLayoutChangeHint,
VerticalSortHint,
HorizontalSortHint
};
Q_ENUM(LayoutChangeHint)

enum class CheckIndexOption {
NoOption = 0x0000,
IndexIsValid = 0x0001,
DoNotUseParent = 0x0002,
ParentIsInvalid = 0x0004,
};
Q_ENUM(CheckIndexOption)
Q_DECLARE_FLAGS(CheckIndexOptions, CheckIndexOption)

Q_REQUIRED_RESULT bool checkIndex(const QModelIndex &index, CheckIndexOptions options = CheckIndexOption::NoOption) const;

Q_SIGNALS:
void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles = QVector<int>());
void headerDataChanged(Qt::Orientation orientation, int first, int last);
void layoutChanged(const QList<QPersistentModelIndex> &parents = QList<QPersistentModelIndex>(), QAbstractItemModel::LayoutChangeHint hint = QAbstractItemModel::NoLayoutChangeHint);
void layoutAboutToBeChanged(const QList<QPersistentModelIndex> &parents = QList<QPersistentModelIndex>(), QAbstractItemModel::LayoutChangeHint hint = QAbstractItemModel::NoLayoutChangeHint);

void rowsAboutToBeInserted(const QModelIndex &parent, int first, int last, QPrivateSignal);
void rowsInserted(const QModelIndex &parent, int first, int last, QPrivateSignal);

void rowsAboutToBeRemoved(const QModelIndex &parent, int first, int last, QPrivateSignal);
void rowsRemoved(const QModelIndex &parent, int first, int last, QPrivateSignal);

void columnsAboutToBeInserted(const QModelIndex &parent, int first, int last, QPrivateSignal);
void columnsInserted(const QModelIndex &parent, int first, int last, QPrivateSignal);

void columnsAboutToBeRemoved(const QModelIndex &parent, int first, int last, QPrivateSignal);
void columnsRemoved(const QModelIndex &parent, int first, int last, QPrivateSignal);

void modelAboutToBeReset(QPrivateSignal);
void modelReset(QPrivateSignal);

void rowsAboutToBeMoved( const QModelIndex &sourceParent, int sourceStart, int sourceEnd, const QModelIndex &destinationParent, int destinationRow, QPrivateSignal);
void rowsMoved( const QModelIndex &parent, int start, int end, const QModelIndex &destination, int row, QPrivateSignal);

void columnsAboutToBeMoved( const QModelIndex &sourceParent, int sourceStart, int sourceEnd, const QModelIndex &destinationParent, int destinationColumn, QPrivateSignal);
void columnsMoved( const QModelIndex &parent, int start, int end, const QModelIndex &destination, int column, QPrivateSignal);

public Q_SLOTS:
virtual bool submit();
virtual void revert();

protected Q_SLOTS:
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
virtual
#endif
void resetInternalData();

protected:
QAbstractItemModel(QAbstractItemModelPrivate &dd, QObject *parent = nullptr);

inline QModelIndex createIndex(int row, int column, void *data = nullptr) const;
inline QModelIndex createIndex(int row, int column, quintptr id) const;

void encodeData(const QModelIndexList &indexes, QDataStream &stream) const;
bool decodeData(int row, int column, const QModelIndex &parent, QDataStream &stream);

void beginInsertRows(const QModelIndex &parent, int first, int last);
void endInsertRows();

void beginRemoveRows(const QModelIndex &parent, int first, int last);
void endRemoveRows();

bool beginMoveRows(const QModelIndex &sourceParent, int sourceFirst, int sourceLast, const QModelIndex &destinationParent, int destinationRow);
void endMoveRows();

void beginInsertColumns(const QModelIndex &parent, int first, int last);
void endInsertColumns();

void beginRemoveColumns(const QModelIndex &parent, int first, int last);
void endRemoveColumns();

bool beginMoveColumns(const QModelIndex &sourceParent, int sourceFirst, int sourceLast, const QModelIndex &destinationParent, int destinationColumn);
void endMoveColumns();


#if QT_DEPRECATED_SINCE(5,0)
QT_DEPRECATED void reset()
{
beginResetModel();
endResetModel();
}
#endif

void beginResetModel();
void endResetModel();

void changePersistentIndex(const QModelIndex &from, const QModelIndex &to);
void changePersistentIndexList(const QModelIndexList &from, const QModelIndexList &to);
QModelIndexList persistentIndexList() const;

#if QT_DEPRECATED_SINCE(5,0)
QT_DEPRECATED void setRoleNames(const QHash<int,QByteArray> &theRoleNames)
{
doSetRoleNames(theRoleNames);
}
#endif

private:
void doSetRoleNames(const QHash<int,QByteArray> &roleNames);
void doSetSupportedDragActions(Qt::DropActions actions);

Q_DECLARE_PRIVATE(QAbstractItemModel)
Q_DISABLE_COPY(QAbstractItemModel)
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QAbstractItemModel::CheckIndexOptions)

inline bool QAbstractItemModel::insertRow(int arow, const QModelIndex &aparent)
{ return insertRows(arow, 1, aparent); }
inline bool QAbstractItemModel::insertColumn(int acolumn, const QModelIndex &aparent)
{ return insertColumns(acolumn, 1, aparent); }
inline bool QAbstractItemModel::removeRow(int arow, const QModelIndex &aparent)
{ return removeRows(arow, 1, aparent); }
inline bool QAbstractItemModel::removeColumn(int acolumn, const QModelIndex &aparent)
{ return removeColumns(acolumn, 1, aparent); }
inline bool QAbstractItemModel::moveRow(const QModelIndex &sourceParent, int sourceRow,
const QModelIndex &destinationParent, int destinationChild)
{ return moveRows(sourceParent, sourceRow, 1, destinationParent, destinationChild); }
inline bool QAbstractItemModel::moveColumn(const QModelIndex &sourceParent, int sourceColumn,
const QModelIndex &destinationParent, int destinationChild)
{ return moveColumns(sourceParent, sourceColumn, 1, destinationParent, destinationChild); }
inline QModelIndex QAbstractItemModel::createIndex(int arow, int acolumn, void *adata) const
{ return QModelIndex(arow, acolumn, adata, this); }
inline QModelIndex QAbstractItemModel::createIndex(int arow, int acolumn, quintptr aid) const
{ return QModelIndex(arow, acolumn, aid, this); }

class Q_CORE_EXPORT QAbstractTableModel : public QAbstractItemModel
{
Q_OBJECT

public:
explicit QAbstractTableModel(QObject *parent = nullptr);
~QAbstractTableModel();

QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
QModelIndex sibling(int row, int column, const QModelIndex &idx) const override;
bool dropMimeData(const QMimeData *data, Qt::DropAction action,
int row, int column, const QModelIndex &parent) override;

Qt::ItemFlags flags(const QModelIndex &index) const override;

using QObject::parent;

protected:
QAbstractTableModel(QAbstractItemModelPrivate &dd, QObject *parent);

private:
Q_DISABLE_COPY(QAbstractTableModel)
QModelIndex parent(const QModelIndex &child) const override;
bool hasChildren(const QModelIndex &parent) const override;
};

class Q_CORE_EXPORT QAbstractListModel : public QAbstractItemModel
{
Q_OBJECT

public:
explicit QAbstractListModel(QObject *parent = nullptr);
~QAbstractListModel();

QModelIndex index(int row, int column = 0, const QModelIndex &parent = QModelIndex()) const override;
QModelIndex sibling(int row, int column, const QModelIndex &idx) const override;
bool dropMimeData(const QMimeData *data, Qt::DropAction action,
int row, int column, const QModelIndex &parent) override;

Qt::ItemFlags flags(const QModelIndex &index) const override;

using QObject::parent;

protected:
QAbstractListModel(QAbstractItemModelPrivate &dd, QObject *parent);

private:
Q_DISABLE_COPY(QAbstractListModel)
QModelIndex parent(const QModelIndex &child) const override;
int columnCount(const QModelIndex &parent) const override;
bool hasChildren(const QModelIndex &parent) const override;
};

// inline implementations

inline QModelIndex QModelIndex::parent() const
{ return m ? m->parent(*this) : QModelIndex(); }

inline QModelIndex QModelIndex::sibling(int arow, int acolumn) const
{ return m ? (r == arow && c == acolumn) ? *this : m->sibling(arow, acolumn, *this) : QModelIndex(); }

inline QModelIndex QModelIndex::siblingAtColumn(int acolumn) const
{ return m ? (c == acolumn) ? *this : m->sibling(r, acolumn, *this) : QModelIndex(); }

inline QModelIndex QModelIndex::siblingAtRow(int arow) const
{ return m ? (r == arow) ? *this : m->sibling(arow, c, *this) : QModelIndex(); }

#if QT_DEPRECATED_SINCE(5, 8)
inline QModelIndex QModelIndex::child(int arow, int acolumn) const
{ return m ? m->index(arow, acolumn, *this) : QModelIndex(); }
#endif

inline QVariant QModelIndex::data(int arole) const
{ return m ? m->data(*this, arole) : QVariant(); }

inline Qt::ItemFlags QModelIndex::flags() const
{ return m ? m->flags(*this) : Qt::ItemFlags(); }

inline uint qHash(const QModelIndex &index) noexcept
{ return uint((uint(index.row()) << 4) + index.column() + index.internalId()); }

QT_END_NAMESPACE

Q_DECLARE_METATYPE(QModelIndexList)

#endif // QABSTRACTITEMMODEL_H