QIdentityProxyModel Class

class DateFormatProxyModel : public QIdentityProxyModel
{
  // ...

  void setDateFormatString(const QString &formatString)
  {
    m_formatString = formatString;
  }

  QVariant data(const QModelIndex &index, int role) const override
  {
    if (role != Qt::DisplayRole)
      return QIdentityProxyModel::data(index, role);

    const QModelIndex sourceIndex = mapToSource(index);
    const QDateTime dateTime = sourceModel()->data(sourceIndex, SourceClass::DateRole).toDateTime();
    return dateTime.toString(m_formatString);
  }

  QMap<int, QVariant> itemData(const QModelIndex &proxyIndex) const override
  {
      QMap<int, QVariant> map = QIdentityProxyModel::itemData(proxyIndex);
      map[Qt::DisplayRole] = data(proxyIndex);
      return map;
  }

private:
  QString m_formatString;
};

Member Function Documentation

[explicit] QIdentityProxyModel::QIdentityProxyModel(QObject *parent = nullptr)

Constructs an identity model with the given parent.

[virtual noexcept] QIdentityProxyModel::~QIdentityProxyModel()

Destroys this identity model.

[override virtual] int QIdentityProxyModel::columnCount(const QModelIndex &parent = QModelIndex()) const

Reimplements: QAbstractItemModel::columnCount(const QModelIndex &parent) const.

[override virtual] bool QIdentityProxyModel::dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent)

Reimplements: QAbstractProxyModel::dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent).

[since 6.8] bool QIdentityProxyModel::handleSourceDataChanges() const

Returns true if this proxy model handles the source model data changes, otherwise returns false.

This function was introduced in Qt 6.8.

See also setHandleSourceDataChanges().

[since 6.8] bool QIdentityProxyModel::handleSourceLayoutChanges() const

Returns true if this proxy model handles the source model layout changes, otherwise returns false.

This function was introduced in Qt 6.8.

See also setHandleSourceLayoutChanges().

[override virtual] QVariant QIdentityProxyModel::headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const

Reimplements: QAbstractProxyModel::headerData(int section, Qt::Orientation orientation, int role) const.

[override virtual] QModelIndex QIdentityProxyModel::index(int row, int column, const QModelIndex &parent = QModelIndex()) const

Reimplements: QAbstractItemModel::index(int row, int column, const QModelIndex &parent) const.

[override virtual] bool QIdentityProxyModel::insertColumns(int column, int count, const QModelIndex &parent = QModelIndex())

Reimplements: QAbstractItemModel::insertColumns(int column, int count, const QModelIndex &parent).

[override virtual] bool QIdentityProxyModel::insertRows(int row, int count, const QModelIndex &parent = QModelIndex())

Reimplements: QAbstractItemModel::insertRows(int row, int count, const QModelIndex &parent).

[override virtual] QModelIndex QIdentityProxyModel::mapFromSource(const QModelIndex &sourceIndex) const

Reimplements: QAbstractProxyModel::mapFromSource(const QModelIndex &sourceIndex) const.

[override virtual] QItemSelection QIdentityProxyModel::mapSelectionFromSource(const QItemSelection &selection) const

Reimplements: QAbstractProxyModel::mapSelectionFromSource(const QItemSelection &sourceSelection) const.

[override virtual] QItemSelection QIdentityProxyModel::mapSelectionToSource(const QItemSelection &selection) const

Reimplements: QAbstractProxyModel::mapSelectionToSource(const QItemSelection &proxySelection) const.

[override virtual] QModelIndex QIdentityProxyModel::mapToSource(const QModelIndex &proxyIndex) const

Reimplements: QAbstractProxyModel::mapToSource(const QModelIndex &proxyIndex) const.

[override virtual] QModelIndexList QIdentityProxyModel::match(const QModelIndex &start, int role, const QVariant &value, int hits = 1, Qt::MatchFlags flags = Qt::MatchFlags(Qt::MatchStartsWith|Qt::MatchWrap)) const

Reimplements: QAbstractItemModel::match(const QModelIndex &start, int role, const QVariant &value, int hits, Qt::MatchFlags flags) const.

[override virtual] bool QIdentityProxyModel::moveColumns(const QModelIndex &sourceParent, int sourceColumn, int count, const QModelIndex &destinationParent, int destinationChild)

Reimplements: QAbstractItemModel::moveColumns(const QModelIndex &sourceParent, int sourceColumn, int count, const QModelIndex &destinationParent, int destinationChild).

[override virtual] bool QIdentityProxyModel::moveRows(const QModelIndex &sourceParent, int sourceRow, int count, const QModelIndex &destinationParent, int destinationChild)

Reimplements: QAbstractItemModel::moveRows(const QModelIndex &sourceParent, int sourceRow, int count, const QModelIndex &destinationParent, int destinationChild).

[override virtual] QModelIndex QIdentityProxyModel::parent(const QModelIndex &child) const

Reimplements: QAbstractItemModel::parent(const QModelIndex &index) const.

[override virtual] bool QIdentityProxyModel::removeColumns(int column, int count, const QModelIndex &parent = QModelIndex())

Reimplements: QAbstractItemModel::removeColumns(int column, int count, const QModelIndex &parent).

[override virtual] bool QIdentityProxyModel::removeRows(int row, int count, const QModelIndex &parent = QModelIndex())

Reimplements: QAbstractItemModel::removeRows(int row, int count, const QModelIndex &parent).

[override virtual] int QIdentityProxyModel::rowCount(const QModelIndex &parent = QModelIndex()) const

Reimplements: QAbstractItemModel::rowCount(const QModelIndex &parent) const.

[protected, since 6.8] void QIdentityProxyModel::setHandleSourceDataChanges(bool b)

If b is true, this proxy model will handle the source model data changes (by connecting to QAbstractItemModel::dataChanged signal).

The default is for this proxy model to handle the source model data changes.

In sub-classes of QIdentityProxyModel, it may be useful to set this to false if you need to specially handle the source model data changes.

This function was introduced in Qt 6.8.

See also handleSourceDataChanges().

[protected, since 6.8] void QIdentityProxyModel::setHandleSourceLayoutChanges(bool b)

If b is true, this proxy model will handle the source model layout changes (by connecting to QAbstractItemModel::layoutAboutToBeChanged and QAbstractItemModel::layoutChanged signals).

The default is for this proxy model to handle the source model layout changes.

In sub-classes of QIdentityProxyModel, it may be useful to set this to false if you need to specially handle the source model layout changes.

This function was introduced in Qt 6.8.

See also handleSourceLayoutChanges().

[override virtual] void QIdentityProxyModel::setSourceModel(QAbstractItemModel *newSourceModel)

Reimplements: QAbstractProxyModel::setSourceModel(QAbstractItemModel *sourceModel).

[override virtual] QModelIndex QIdentityProxyModel::sibling(int row, int column, const QModelIndex &idx) const

Reimplements: QAbstractProxyModel::sibling(int row, int column, const QModelIndex &idx) const.