内容

• 公共函数
• 重实现公共函数
• 详细描述

QConcatenateTablesProxyModel Class

The QConcatenateTablesProxyModel class proxies multiple source models, concatenating their rows. 更多...

头：	#include <QConcatenateTablesProxyModel>
qmake:	QT += core
Since:	Qt 5.13
继承：	QAbstractItemModel

该类在 Qt 5.13 引入。

• 所有成员列表，包括继承成员

公共函数

	QConcatenateTablesProxyModel (QObject * parent = nullptr)
virtual	~QConcatenateTablesProxyModel ()
void	addSourceModel (QAbstractItemModel * sourceModel )
QModelIndex	mapFromSource (const QModelIndex & sourceIndex ) const
QModelIndex	mapToSource (const QModelIndex & proxyIndex ) const
void	removeSourceModel (QAbstractItemModel * sourceModel )
QList<QAbstractItemModel *>	sourceModels () const

重实现公共函数

virtual bool	canDropMimeData (const QMimeData * data , Qt::DropAction action , int row , int column , const QModelIndex & parent ) const override
virtual int	columnCount (const QModelIndex & parent = QModelIndex()) const override
virtual QVariant	data (const QModelIndex & index , int role = Qt::DisplayRole) const override
virtual bool	dropMimeData (const QMimeData * data , Qt::DropAction action , int row , int column , const QModelIndex & parent ) override
virtual Qt::ItemFlags	flags (const QModelIndex & index ) const override
virtual QVariant	headerData (int section , Qt::Orientation orientation , int role = Qt::DisplayRole) const override
virtual QModelIndex	index (int row , int column , const QModelIndex & parent = QModelIndex()) const override
virtual QMap<int, QVariant>	itemData (const QModelIndex & proxyIndex ) const override
virtual QMimeData *	mimeData (const QModelIndexList & indexes ) const override
virtual QStringList	mimeTypes () const override
virtual QModelIndex	parent (const QModelIndex & index ) const override
virtual int	rowCount (const QModelIndex & parent = QModelIndex()) const override
virtual bool	setData (const QModelIndex & index , const QVariant & value , int role = Qt::EditRole) override
virtual bool	setItemData (const QModelIndex & proxyIndex , const QMap<int, QVariant> & roles ) override
virtual QSize	span (const QModelIndex & index ) const override

详细描述

QConcatenateTablesProxyModel takes multiple source models and concatenates their rows.

In other words, the proxy will have all rows of the first source model, followed by all rows of the second source model, and so on.

If the source models don't have the same number of columns, the proxy will only have as many columns as the source model with the smallest number of columns. Additional columns in other source models will simply be ignored.

Source models can be added and removed at runtime, and the column count is adjusted accordingly.

This proxy does not inherit from QAbstractProxyModel because it uses multiple source models, rather than a single one.

Only flat models (lists and tables) are supported, tree models are not.

另请参阅 QAbstractProxyModel , 模型/视图编程 , QIdentityProxyModel ，和 QAbstractItemModel .

成员函数文档编制

QConcatenateTablesProxyModel:: QConcatenateTablesProxyModel ( QObject * parent = nullptr)

Constructs a concatenate-rows proxy model with the given parent .

[virtual] QConcatenateTablesProxyModel:: ~QConcatenateTablesProxyModel ()

Destroys this proxy model.

void QConcatenateTablesProxyModel:: addSourceModel ( QAbstractItemModel * sourceModel )

Adds a source model sourceModel , below all previously added source models.

所有权对于 sourceModel is not affected by this.

The same source model cannot be added more than once.

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

重实现： QAbstractItemModel::canDropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) const.

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

重实现： QAbstractItemModel::columnCount (const QModelIndex &parent) const.

This method returns the column count of the source model with the smallest number of columns.

[override virtual] QVariant QConcatenateTablesProxyModel:: data (const QModelIndex & index , int role = Qt::DisplayRole) const

重实现： QAbstractItemModel::data (const QModelIndex &index, int role) const.

另请参阅 setData ().

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

重实现： QAbstractItemModel::dropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent).

QConcatenateTablesProxyModel handles dropping onto an item, between items, and after the last item. In all cases the call is forwarded to the underlying source model. When dropping onto an item, the source model for this item is called. When dropping between items, the source model immediately below the drop position is called. When dropping after the last item, the last source model is called.

[override virtual] Qt::ItemFlags QConcatenateTablesProxyModel:: flags (const QModelIndex & index ) const

重实现： QAbstractItemModel::flags (const QModelIndex &index) const.

Returns the flags for the given index. If the index is valid, the flags come from the source model for this index 。若 index is invalid (as used to determine if dropping onto an empty area in the view is allowed, for instance), the flags from the first model are returned.

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

重实现： QAbstractItemModel::headerData (int section, Qt::Orientation orientation, int role) const.

This method returns the horizontal header data for the first source model, and the vertical header data for the source model corresponding to each row.

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

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

[override virtual] QMap < int , QVariant > QConcatenateTablesProxyModel:: itemData (const QModelIndex & proxyIndex ) const

重实现： QAbstractItemModel::itemData (const QModelIndex &index) const.

另请参阅 setItemData ().

QModelIndex QConcatenateTablesProxyModel:: mapFromSource (const QModelIndex & sourceIndex ) const

Returns the proxy index for a given sourceIndex , which can be from any of the source models.

QModelIndex QConcatenateTablesProxyModel:: mapToSource (const QModelIndex & proxyIndex ) const

Returns the source index for a given proxyIndex .

[override virtual] QMimeData *QConcatenateTablesProxyModel:: mimeData (const QModelIndexList & indexes ) const

重实现： QAbstractItemModel::mimeData (const QModelIndexList &indexes) const.

The call is forwarded to the source model of the first index in the list of indexes .

Important: please note that this proxy only supports dragging a single row. It will assert if called with indexes from multiple rows, because dragging rows that might come from different source models cannot be implemented generically by this proxy model. Each piece of data in the QMimeData needs to be merged, which is data-type-specific. Reimplement this method in a subclass if you want to support dragging multiple rows.

[override virtual] QStringList QConcatenateTablesProxyModel:: mimeTypes () const

重实现： QAbstractItemModel::mimeTypes () const.

This method returns the mime types for the first source model.

[override virtual] QModelIndex QConcatenateTablesProxyModel:: parent (const QModelIndex & index ) const

重实现： QAbstractItemModel::parent (const QModelIndex &index) const.

void QConcatenateTablesProxyModel:: removeSourceModel ( QAbstractItemModel * sourceModel )

Removes the source model sourceModel , which was previously added to this proxy.

所有权对于 sourceModel is not affected by this.

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

重实现： QAbstractItemModel::rowCount (const QModelIndex &parent) const.

[override virtual] bool QConcatenateTablesProxyModel:: setData (const QModelIndex & index , const QVariant & value , int role = Qt::EditRole)

重实现： QAbstractItemModel::setData (const QModelIndex &index, const QVariant &value, int role).

另请参阅 data ().

[override virtual] bool QConcatenateTablesProxyModel:: setItemData (const QModelIndex & proxyIndex , const QMap < int , QVariant > & roles )

重实现： QAbstractItemModel::setItemData (const QModelIndex &index, const QMap<int, QVariant> &roles).

另请参阅 itemData ().

QList < QAbstractItemModel *> QConcatenateTablesProxyModel:: sourceModels () const

Returns a list of models that were added as source models for this proxy model.

该函数在 Qt 5.15 引入。

[override virtual] QSize QConcatenateTablesProxyModel:: span (const QModelIndex & index ) const

重实现： QAbstractItemModel::span (const QModelIndex &index) const.