CopperSpice API  1.7.2
QIdentityProxyModel Class Reference

The QIdentityProxyModel class proxies its source model unmodified. More...

Inheritance diagram for QIdentityProxyModel:
QAbstractProxyModel QAbstractItemModel QObject

Public Methods

 QIdentityProxyModel (QObject *parent=nullptr)
 
 ~QIdentityProxyModel ()
 
int columnCount (const QModelIndex &parent=QModelIndex ()) const override
 
bool dropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) override
 
QVariant headerData (int section, Qt::Orientation orientation, int role=Qt::DisplayRole) const override
 
QModelIndex index (int row, int column, const QModelIndex &parent=QModelIndex ()) const override
 
bool insertColumns (int column, int count, const QModelIndex &parent=QModelIndex ()) override
 
bool insertRows (int row, int count, const QModelIndex &parent=QModelIndex ()) override
 
QModelIndex mapFromSource (const QModelIndex &sourceIndex) const override
 
QItemSelection mapSelectionFromSource (const QItemSelection &selection) const override
 
QItemSelection mapSelectionToSource (const QItemSelection &selection) const override
 
QModelIndex mapToSource (const QModelIndex &proxyIndex) const override
 
QModelIndexList match (const QModelIndex &start, int role, const QVariant &value, int hits=1, Qt::MatchFlags flags=Qt::MatchFlags (Qt::MatchStartsWith|Qt::MatchWrap)) const override
 
QObjectparent () const
 
QModelIndex parent (const QModelIndex &child) const override
 
bool removeColumns (int column, int count, const QModelIndex &parent=QModelIndex ()) override
 
bool removeRows (int row, int count, const QModelIndex &parent=QModelIndex ()) override
 
int rowCount (const QModelIndex &parent=QModelIndex ()) const override
 
void setSourceModel (QAbstractItemModel *sourceModel) override
 
QModelIndex sibling (int row, int column, const QModelIndex &idx) const override
 
- Public Methods inherited from QAbstractProxyModel
 QAbstractProxyModel (QObject *parent=nullptr)
 
 ~QAbstractProxyModel () = default
 
QModelIndex buddy (const QModelIndex &index) const override
 
bool canDropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) const override
 
bool canFetchMore (const QModelIndex &parent) const override
 
QVariant data (const QModelIndex &proxyIndex, int role=Qt::DisplayRole) const override
 
void fetchMore (const QModelIndex &parent) override
 
Qt::ItemFlags flags (const QModelIndex &index) const override
 
bool hasChildren (const QModelIndex &parent=QModelIndex ()) const override
 
QMap< int, QVariantitemData (const QModelIndex &proxyIndex) const override
 
QMimeDatamimeData (const QModelIndexList &indexes) const override
 
QStringList mimeTypes () const override
 
void revert () override
 
bool setData (const QModelIndex &index, const QVariant &value, int role=Qt::EditRole) override
 
bool setHeaderData (int section, Qt::Orientation orientation, const QVariant &value, int role=Qt::EditRole) override
 
bool setItemData (const QModelIndex &index, const QMap< int, QVariant > &roles) override
 
void sort (int column, Qt::SortOrder order=Qt::AscendingOrder) override
 
QAbstractItemModelsourceModel () const
 
QSize span (const QModelIndex &index) const override
 
bool submit () override
 
Qt::DropActions supportedDragActions () const override
 
Qt::DropActions supportedDropActions () const override
 
- Public Methods inherited from QAbstractItemModel
 QAbstractItemModel (QObject *parent=nullptr)
 
virtual ~QAbstractItemModel ()
 
bool hasIndex (int row, int column, const QModelIndex &parent=QModelIndex ()) const
 
bool insertColumn (int column, const QModelIndex &parent=QModelIndex ())
 
bool insertRow (int row, const QModelIndex &parent=QModelIndex ())
 
bool moveColumn (const QModelIndex &sourceParent, int sourceColumn, const QModelIndex &destinationParent, int destinationChild)
 
virtual bool moveColumns (const QModelIndex &sourceParent, int sourceColumn, int count, const QModelIndex &destinationParent, int destinationChild)
 
bool moveRow (const QModelIndex &sourceParent, int sourceRow, const QModelIndex &destinationParent, int destinationChild)
 
virtual bool moveRows (const QModelIndex &sourceParent, int sourceRow, int count, const QModelIndex &destinationParent, int destinationChild)
 
QObjectparent () const
 
bool removeColumn (int column, const QModelIndex &parent=QModelIndex ())
 
bool removeRow (int row, const QModelIndex &parent=QModelIndex ())
 
virtual QMultiHash< int, QStringroleNames () const
 
- Public Methods inherited from QObject
 QObject (QObject *parent=nullptr)
 
 ~QObject ()
 
bool blockSignals (bool block)
 
const QList< QObject * > & children () const
 
bool connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)
 
bool connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)
 
bool disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const
 
bool disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const
 
bool disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const
 
void dumpObjectInfo ()
 
void dumpObjectTree ()
 
QList< QStringdynamicPropertyNames () const
 
virtual bool event (QEvent *event)
 
virtual bool eventFilter (QObject *watched, QEvent *event)
 
template<typename T >
findChild (const QString &childName=QString ()) const
 
template<class T >
QList< T > findChildren (const QRegularExpression &regExp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 
template<class T >
QList< T > findChildren (const QString &objName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
 
bool inherits (const QString &className) const
 
void installEventFilter (QObject *filterObj)
 
bool isWidgetType () const
 
bool isWindowType () const
 
void killTimer (int id)
 
const QMetaObjectmetaObject () const
 
void moveToThread (QThread *targetThread)
 
QString objectName () const
 
QObject * parent () const
 
template<class T = QVariant>
property (const QString &name) const
 
void removeEventFilter (QObject *obj)
 
void setObjectName (const QString &name)
 
void setParent (QObject *parent)
 
bool setProperty (const QString &name, const QVariant &value)
 
bool signalsBlocked () const
 
int startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
 
QThreadthread () const
 

Additional Inherited Members

- Public Signals inherited from QAbstractProxyModel
void sourceModelChanged ()
 
- Public Signals inherited from QAbstractItemModel
void columnsAboutToBeInserted (const QModelIndex &parent, int first, int last)
 
void columnsAboutToBeMoved (const QModelIndex &sourceParent, int sourceStart, int sourceEnd, const QModelIndex &destinationParent, int destinationColumn)
 
void columnsAboutToBeRemoved (const QModelIndex &parent, int first, int last)
 
void columnsInserted (const QModelIndex &parent, int first, int last)
 
void columnsMoved (const QModelIndex &sourceParent, int sourceStart, int sourceEnd, const QModelIndex &destinationParent, int destinationColumn)
 
void columnsRemoved (const QModelIndex &parent, int first, int last)
 
void dataChanged (const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector< int > &roles=QVector< int >())
 
void headerDataChanged (Qt::Orientation orientation, int first, int last)
 
void layoutAboutToBeChanged (const QList< QPersistentModelIndex > &parents=QList< QPersistentModelIndex >(), QAbstractItemModel::LayoutChangeHint hint=QAbstractItemModel::NoLayoutChangeHint)
 
void layoutChanged (const QList< QPersistentModelIndex > &parents=QList< QPersistentModelIndex >(), QAbstractItemModel::LayoutChangeHint hint=QAbstractItemModel::NoLayoutChangeHint)
 
void modelAboutToBeReset ()
 
void modelReset ()
 
void rowsAboutToBeInserted (const QModelIndex &parent, int first, int last)
 
void rowsAboutToBeMoved (const QModelIndex &sourceParent, int sourceStart, int sourceEnd, const QModelIndex &destinationParent, int destinationRow)
 
void rowsAboutToBeRemoved (const QModelIndex &parent, int first, int last)
 
void rowsInserted (const QModelIndex &parent, int first, int last)
 
void rowsMoved (const QModelIndex &sourceParent, int sourceStart, int sourceEnd, const QModelIndex &destinationParent, int destinationRow)
 
void rowsRemoved (const QModelIndex &parent, int first, int last)
 
- Public Signals inherited from QObject
void destroyed (QObject *obj=nullptr)
 
void objectNameChanged (const QString &objectName)
 
- Public Slots inherited from QAbstractItemModel
virtual void revert ()
 
virtual bool submit ()
 
- Public Slots inherited from QObject
void deleteLater ()
 
- Static Public Methods inherited from QObject
static bool connect (const QObject *sender, const QMetaMethod &signalMethod, const QObject *receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)
 
static bool connect (const QObject *sender, const QString &signalMethod, const QObject *receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ())
 
static bool connect (const QObject *sender, const QString &signalMethod, const QString &location, const QObject *receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)
 
template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool connect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, SlotReturn (SlotClass::*slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection)
 
template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool connect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection)
 
static bool disconnect (const QObject *sender, const QMetaMethod &signalMethod, const QObject *receiver, const QMetaMethod &slotMethod)
 
static bool disconnect (const QObject *sender, const QString &signalMethod, const QObject *receiver, const QString &slotMethod)
 
static bool disconnect (const QObject *sender, const QString &signalMethod, const QString &location, const QObject *receiver, const QString &slotMethod)
 
template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool disconnect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, SlotReturn (SlotClass::*slotMethod)(SlotArgs...))
 
template<class Sender , class SignalClass , class... SignalArgs, class Receiver >
static bool disconnect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr)
 
template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool disconnect (const Sender *sender, void (SignalClass::*signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod)
 
static QMetaObjectstaticMetaObject ()
 
static QString tr (const char *text, const char *comment=nullptr, std::optional< int > numArg=std::optional< int >())
 
- Protected Slots inherited from QAbstractProxyModel
void resetInternalData ()
 
- Protected Slots inherited from QAbstractItemModel
void resetInternalData ()
 
- Protected Methods inherited from QAbstractItemModel
void beginInsertColumns (const QModelIndex &parent, int first, int last)
 
void beginInsertRows (const QModelIndex &parent, int first, int last)
 
bool beginMoveColumns (const QModelIndex &sourceParent, int sourceFirst, int sourceLast, const QModelIndex &destinationParent, int destinationColumn)
 
bool beginMoveRows (const QModelIndex &sourceParent, int sourceFirst, int sourceLast, const QModelIndex &destinationParent, int destinationRow)
 
void beginRemoveColumns (const QModelIndex &parent, int first, int last)
 
void beginRemoveRows (const QModelIndex &parent, int first, int last)
 
void beginResetModel ()
 
void changePersistentIndex (const QModelIndex &from, const QModelIndex &to)
 
void changePersistentIndexList (const QModelIndexList &from, const QModelIndexList &to)
 
QModelIndex createIndex (int row, int column, quintptr id) const
 
QModelIndex createIndex (int row, int column, void *data=nullptr) const
 
void endInsertColumns ()
 
void endInsertRows ()
 
void endMoveColumns ()
 
void endMoveRows ()
 
void endRemoveColumns ()
 
void endRemoveRows ()
 
void endResetModel ()
 
QModelIndexList persistentIndexList () const
 
- Protected Methods inherited from QObject
virtual void childEvent (QChildEvent *event)
 
virtual void connectNotify (const QMetaMethod &signalMethod) const
 
virtual void customEvent (QEvent *event)
 
virtual void disconnectNotify (const QMetaMethod &signalMethod) const
 
bool isSignalConnected (const QMetaMethod &signalMethod) const
 
int receivers (const QString &signal) const
 
QObject * sender () const
 
int senderSignalIndex () const
 
virtual void timerEvent (QTimerEvent *event)
 
- Properties inherited from QAbstractProxyModel
 sourceModel
 
- Properties inherited from QObject
 objectName
 

Detailed Description

The QIdentityProxyModel class proxies its source model unmodified

QIdentityProxyModel can be used to forward the structure of a source model exactly, with no sorting, filtering or other transformation. This is similar in concept to an identity matrix where A.I = A.

Because it does no sorting or filtering, this class is most suitable to proxy models which transform the data() of the source model. For example, a proxy model could be created to define the font used, or the background color, or the tooltip etc. This removes the need to implement all data handling in the same class that creates the structure of the model, and can also be used to create re-usable components.

This also provides a way to change the data in the case where a source model is supplied by a third party which can not be modified.

class DateFormatProxyModel : public QIdentityProxyModel
{
// ...
void setDateFormatString(const QString &formatString)
{
m_formatString = formatString;
}
QVariant data(const QModelIndex &index, int role)
{
if (role != Qt::DisplayRole)
return QIdentityProxyModel::data(index, role);
const QDateTime dateTime = sourceModel()->data(SourceClass::DateRole).toDateTime();
return dateTime.toString(m_formatString);
}
private:
QString m_formatString;
};
See also
QAbstractProxyModel, Model/View Programming, QAbstractItemModel

Constructor & Destructor Documentation

QIdentityProxyModel::QIdentityProxyModel ( QObject parent = nullptr)
explicit

Constructs an identity model with the given parent.

QIdentityProxyModel::~QIdentityProxyModel ( )

Destroys this identity model.

Method Documentation

int QIdentityProxyModel::columnCount ( const QModelIndex parent = QModelIndex()) const
overridevirtual

Reimplemented from QAbstractItemModel::columnCount().

Implements QAbstractItemModel.

bool QIdentityProxyModel::dropMimeData ( const QMimeData data,
Qt::DropAction  action,
int  row,
int  column,
const QModelIndex parent 
)
overridevirtual

Reimplemented from QAbstractItemModel::dropMimeData().

Reimplemented from QAbstractProxyModel.

QVariant QIdentityProxyModel::headerData ( int  section,
Qt::Orientation  orientation,
int  role = Qt::DisplayRole 
) const
overridevirtual

Reimplemented from QAbstractItemModel::headerData().

See also
setHeaderData()

Reimplemented from QAbstractProxyModel.

QModelIndex QIdentityProxyModel::index ( int  row,
int  column,
const QModelIndex parent = QModelIndex() 
) const
overridevirtual

Reimplemented from QAbstractItemModel::index().

Implements QAbstractItemModel.

bool QIdentityProxyModel::insertColumns ( int  column,
int  count,
const QModelIndex parent = QModelIndex() 
)
overridevirtual

Reimplemented from QAbstractItemModel::insertColumns().

Reimplemented from QAbstractItemModel.

bool QIdentityProxyModel::insertRows ( int  row,
int  count,
const QModelIndex parent = QModelIndex() 
)
overridevirtual

Reimplemented from QAbstractItemModel::insertRows().

Reimplemented from QAbstractItemModel.

QModelIndex QIdentityProxyModel::mapFromSource ( const QModelIndex sourceIndex) const
overridevirtual
QItemSelection QIdentityProxyModel::mapSelectionFromSource ( const QItemSelection selection) const
overridevirtual

Reimplemented from QAbstractProxyModel::mapSelectionFromSource().

Reimplemented from QAbstractProxyModel.

QItemSelection QIdentityProxyModel::mapSelectionToSource ( const QItemSelection selection) const
overridevirtual

Reimplemented from QAbstractProxyModel::mapSelectionToSource().

Reimplemented from QAbstractProxyModel.

QModelIndex QIdentityProxyModel::mapToSource ( const QModelIndex proxyIndex) const
overridevirtual
QModelIndexList QIdentityProxyModel::match ( const QModelIndex start,
int  role,
const QVariant value,
int  hits = 1,
Qt::MatchFlags  flags = Qt::MatchFlags(Qt::MatchStartsWith | Qt::MatchWrap) 
) const
overridevirtual

Reimplemented from QAbstractItemModel::match().

Reimplemented from QAbstractItemModel.

QObject * QObject::parent ( ) const
using

Returns a pointer to the parent object.

See also
setParent(), children()
QModelIndex QIdentityProxyModel::parent ( const QModelIndex child) const
overridevirtual

Reimplemented from QAbstractItemModel::parent().

Implements QAbstractItemModel.

bool QIdentityProxyModel::removeColumns ( int  column,
int  count,
const QModelIndex parent = QModelIndex() 
)
overridevirtual

Reimplemented from QAbstractItemModel::removeColumns().

Reimplemented from QAbstractItemModel.

bool QIdentityProxyModel::removeRows ( int  row,
int  count,
const QModelIndex parent = QModelIndex() 
)
overridevirtual

Reimplemented from QAbstractItemModel::removeRows().

Reimplemented from QAbstractItemModel.

int QIdentityProxyModel::rowCount ( const QModelIndex parent = QModelIndex()) const
overridevirtual

Reimplemented from QAbstractItemModel::rowCount().

Implements QAbstractItemModel.

void QIdentityProxyModel::setSourceModel ( QAbstractItemModel sourceModel)
overridevirtual

Reimplemented from QAbstractProxyModel::setSourceModel().

Reimplemented from QAbstractProxyModel.

QModelIndex QIdentityProxyModel::sibling ( int  row,
int  column,
const QModelIndex index 
) const
overridevirtual

Returns the sibling at row and column for the item at index, or an invalid QModelIndex if there is no sibling at that location. The sibling() is just a convenience function that finds the item's parent, and uses it to retrieve the index of the child item in the specified row and column.

See also
index(), QModelIndex::row(), QModelIndex::column()

Reimplemented from QAbstractProxyModel.