digiKam Developer Documentation
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Digikam::GPSModelIndexProxyMapper Class Reference

This class facilitates easy mapping of indexes and selections through proxy models. More...

+ Inheritance diagram for Digikam::GPSModelIndexProxyMapper:

Signals

void isConnectedChanged ()
 

Public Member Functions

 GPSModelIndexProxyMapper (const QAbstractItemModel *const leftModel, const QAbstractItemModel *const rightModel, QObject *const parent=nullptr)
 
bool isConnected () const
 
QModelIndex mapLeftToRight (const QModelIndex &index) const
 Maps the index from the left model to the right model.
 
QModelIndex mapRightToLeft (const QModelIndex &index) const
 Maps the index from the right model to the left model.
 
QItemSelection mapSelectionLeftToRight (const QItemSelection &selection) const
 Maps the selection from the left model to the right model.
 
QItemSelection mapSelectionRightToLeft (const QItemSelection &selection) const
 Maps the selection from the right model to the left model.
 

Properties

bool isConnected
 Indicates whether there is a chain that can be followed from leftModel to rightModel.
 

Detailed Description

In a complex system of proxy models there can be a need to map indexes and selections between them, and sometimes to do so without knowledge of the path from one model to another.

If there is a need to map indexes between proxy 2 and proxy 4, a GPSModelIndexProxyMapper can be created to facilitate mapping of indexes between them.

Note that the aim is to achieve black box connections so that there is no need for application code to know the structure of proxy models in the path between left and right and attempt to manually map them.

The isConnected property indicates whether there is a path from the left side to the right side.

Property Documentation

◆ isConnected

bool Digikam::GPSModelIndexProxyMapper::isConnected
read

This value can change if the sourceModel of an intermediate proxy is changed.