KModelIndexProxyMapper Class Reference

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

#include <kmodelindexproxymapper.h>

Inheritance diagram for KModelIndexProxyMapper:

List of all members.

Public Member Functions
	KModelIndexProxyMapper (const QAbstractItemModel *leftModel, const QAbstractItemModel *rightModel, QObject *parent=0)
	~KModelIndexProxyMapper ()
QModelIndex	mapLeftToRight (const QModelIndex &index) const
QModelIndex	mapRightToLeft (const QModelIndex &index) const
QItemSelection	mapSelectionLeftToRight (const QItemSelection &selection) const
QItemSelection	mapSelectionRightToLeft (const QItemSelection &selection) const

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Detailed Description

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

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.

For example,

 *     Root model
 *         |
 *       /    \
 *   Proxy 1   Proxy 3
 *      |       |
 *   Proxy 2   Proxy 4
 * 

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

   m_indexMapper = new KModelIndexProxyMapper(proxy2, proxy4, this);

  ...

   const QModelIndex proxy4Index = m_mapLeftToRight(proxy2->index(0, 0));
   Q_ASSERT(proxy4Index.model() == proxy4);

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.

 *     Root model
 *         |
 *   ---------------
 *   |  Black Box  |
 *   ---------------
 *      |       |
 *   Proxy 2   Proxy 4
 * 

Author:

Stephen Kelly <steveire@gmail.com>

Definition at line 79 of file kmodelindexproxymapper.h.

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Constructor & Destructor Documentation

KModelIndexProxyMapper::KModelIndexProxyMapper	(	const QAbstractItemModel *	leftModel,
		const QAbstractItemModel *	rightModel,
		QObject *	parent = 0
	)

Constructor.

Definition at line 162 of file kmodelindexproxymapper.cpp.

KModelIndexProxyMapper::~KModelIndexProxyMapper

(

)

Definition at line 168 of file kmodelindexproxymapper.cpp.

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Member Function Documentation

QModelIndex KModelIndexProxyMapper::mapLeftToRight

(

const QModelIndex &

index

)

const

Maps the index from the left model to the right model.

Definition at line 173 of file kmodelindexproxymapper.cpp.

QModelIndex KModelIndexProxyMapper::mapRightToLeft

(

const QModelIndex &

index

)

const

Maps the index from the right model to the left model.

Definition at line 182 of file kmodelindexproxymapper.cpp.

QItemSelection KModelIndexProxyMapper::mapSelectionLeftToRight

(

const QItemSelection &

selection

)

const

Maps the selection from the left model to the right model.

Definition at line 213 of file kmodelindexproxymapper.cpp.

QItemSelection KModelIndexProxyMapper::mapSelectionRightToLeft

(

const QItemSelection &

selection

)

const

Maps the selection from the right model to the left model.

Definition at line 260 of file kmodelindexproxymapper.cpp.

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The documentation for this class was generated from the following files:

• kmodelindexproxymapper.h
• kmodelindexproxymapper.cpp