Wt
3.2.3
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A read-only wrapper for a source model. More...
#include <Wt/WReadOnlyProxyModel>
Public Member Functions | |
WReadOnlyProxyModel (WObject *parent=0) | |
Constructor. | |
virtual WModelIndex | mapFromSource (const WModelIndex &sourceIndex) const |
Maps a source model index to the proxy model. | |
virtual WModelIndex | mapToSource (const WModelIndex &proxyIndex) const |
Maps a proxy model index to the source model. | |
virtual int | columnCount (const WModelIndex &parent=WModelIndex()) const |
Returns the number of columns. | |
virtual int | rowCount (const WModelIndex &parent=WModelIndex()) const |
Returns the number of rows. | |
virtual WModelIndex | parent (const WModelIndex &index) const |
Returns the parent for a model index. | |
virtual WModelIndex | index (int row, int column, const WModelIndex &parent=WModelIndex()) const |
Returns the child index for the given row and column. |
A read-only wrapper for a source model.
This is a simple proxy model which provides a read-only view on a source model. This is convenient for situations where you want to share a common read-only source model between different sessions.
int Wt::WReadOnlyProxyModel::columnCount | ( | const WModelIndex & | parent = WModelIndex() | ) | const [virtual] |
Returns the number of columns.
This returns the number of columns at index parent
.
Implements Wt::WAbstractItemModel.
WModelIndex Wt::WReadOnlyProxyModel::index | ( | int | row, |
int | column, | ||
const WModelIndex & | parent = WModelIndex() |
||
) | const [virtual] |
Returns the child index for the given row and column.
When implementing this method, you can use createIndex() to create an index that corresponds to the item at row
and column
within parent
.
If the location is invalid (out of bounds at the parent), then an invalid index must be returned.
Implements Wt::WAbstractItemModel.
WModelIndex Wt::WReadOnlyProxyModel::mapFromSource | ( | const WModelIndex & | sourceIndex | ) | const [virtual] |
Maps a source model index to the proxy model.
This method returns a model index in the proxy model that corresponds to the model index sourceIndex
in the source model. This method must only be implemented for source model indexes that are mapped and thus are the result of mapToSource().
Implements Wt::WAbstractProxyModel.
WModelIndex Wt::WReadOnlyProxyModel::mapToSource | ( | const WModelIndex & | proxyIndex | ) | const [virtual] |
Maps a proxy model index to the source model.
This method returns a model index in the source model that corresponds to the proxy model index proxyIndex
.
Implements Wt::WAbstractProxyModel.
WModelIndex Wt::WReadOnlyProxyModel::parent | ( | const WModelIndex & | index | ) | const [virtual] |
Returns the parent for a model index.
An implementation should use createIndex() to create a model index that corresponds to the parent of a given index.
Note that the index itself may be stale (referencing a row/column within the parent that is outside the model geometry), but its parent (identified by the WModelIndex::internalPointer()) is referencing an existing parent. A stale index can only be used while the model geometry is being updated, i.e. during the emission of the corresponding [rows/columns](Being)[Removed/Inserted]() signals.
Implements Wt::WAbstractItemModel.
int Wt::WReadOnlyProxyModel::rowCount | ( | const WModelIndex & | parent = WModelIndex() | ) | const [virtual] |
Returns the number of rows.
This returns the number of rows at index parent
.
Implements Wt::WAbstractItemModel.