mirror of
https://bitbucket.org/smil3y/kdelibs.git
synced 2025-02-24 10:52:49 +00:00
117 lines
3.4 KiB
C++
117 lines
3.4 KiB
C++
/*
|
|
Copyright (C) 2010 Klarälvdalens Datakonsult AB,
|
|
a KDAB Group company, info@kdab.net,
|
|
author Stephen Kelly <stephen@kdab.com>
|
|
|
|
This library is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Library General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or (at your
|
|
option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with this library; see the file COPYING.LIB. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef KMODELINDEXPROXYMAPPER_H
|
|
#define KMODELINDEXPROXYMAPPER_H
|
|
|
|
#include <QObject>
|
|
|
|
#include "kdeui_export.h"
|
|
|
|
class QAbstractItemModel;
|
|
class QModelIndex;
|
|
class QItemSelection;
|
|
class KModelIndexProxyMapperPrivate;
|
|
|
|
/**
|
|
* @brief 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,
|
|
*
|
|
* @verbatim
|
|
* Root model
|
|
* |
|
|
* / \
|
|
* Proxy 1 Proxy 3
|
|
* | |
|
|
* Proxy 2 Proxy 4
|
|
* @endverbatim
|
|
*
|
|
* 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.
|
|
*
|
|
* @code
|
|
* m_indexMapper = new KModelIndexProxyMapper(proxy2, proxy4, this);
|
|
*
|
|
* ...
|
|
*
|
|
* const QModelIndex proxy4Index = m_mapLeftToRight(proxy2->index(0, 0));
|
|
* Q_ASSERT(proxy4Index.model() == proxy4);
|
|
* @endcode
|
|
*
|
|
* 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.
|
|
*
|
|
* @verbatim
|
|
* Root model
|
|
* |
|
|
* ---------------
|
|
* | Black Box |
|
|
* ---------------
|
|
* | |
|
|
* Proxy 2 Proxy 4
|
|
* @endverbatim
|
|
*
|
|
* @author Stephen Kelly <steveire@gmail.com>
|
|
*
|
|
*/
|
|
class KDEUI_EXPORT KModelIndexProxyMapper : public QObject
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
/**
|
|
* Constructor
|
|
*/
|
|
KModelIndexProxyMapper(const QAbstractItemModel *leftModel, const QAbstractItemModel *rightModel, QObject* parent = 0);
|
|
|
|
~KModelIndexProxyMapper();
|
|
|
|
/**
|
|
* Maps the @p index from the left model to the right model.
|
|
*/
|
|
QModelIndex mapLeftToRight(const QModelIndex &index) const;
|
|
|
|
/**
|
|
* Maps the @p index from the right model to the left model.
|
|
*/
|
|
QModelIndex mapRightToLeft(const QModelIndex &index) const;
|
|
|
|
/**
|
|
* Maps the @p selection from the left model to the right model.
|
|
*/
|
|
QItemSelection mapSelectionLeftToRight(const QItemSelection &selection) const;
|
|
|
|
/**
|
|
* Maps the @p selection from the right model to the left model.
|
|
*/
|
|
QItemSelection mapSelectionRightToLeft(const QItemSelection &selection) const;
|
|
|
|
private:
|
|
//@cond PRIVATE
|
|
Q_DECLARE_PRIVATE(KModelIndexProxyMapper)
|
|
KModelIndexProxyMapperPrivate * const d_ptr;
|
|
//@endcond
|
|
};
|
|
|
|
#endif
|