mirror of
https://bitbucket.org/smil3y/kde-playground.git
synced 2025-02-24 10:52:52 +00:00
132 lines
3.7 KiB
C++
132 lines
3.7 KiB
C++
/*
|
|
Copyright (c) 2009 Volker Krause <vkrause@kde.org>
|
|
|
|
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 AKONADI_ENTITYTREEVIEWSTATESAVER_H
|
|
#define AKONADI_ENTITYTREEVIEWSTATESAVER_H
|
|
|
|
#include "akonadi_export.h"
|
|
|
|
#include <QtCore/QObject>
|
|
|
|
class QTreeView;
|
|
class KConfigGroup;
|
|
|
|
namespace Akonadi {
|
|
|
|
class EntityTreeViewStateSaverPrivate;
|
|
|
|
/**
|
|
* @short A helper class that saves and restores state of an EntityTreeView
|
|
*
|
|
* This class saves and restores the state of a QTreeView showing an EntityTreeModel,
|
|
* or whatever proxies are stacked on top of one. State so far means the current selection
|
|
* and expansion of the items and collections.
|
|
*
|
|
* The EntityTreeViewStateSaver is needed because populating the EntityTreeModel
|
|
* is asynchronous and finding the right point in time to restore the state is a
|
|
* difficult task that is hidden inside this class.
|
|
*
|
|
* Example:
|
|
*
|
|
* @code
|
|
*
|
|
* class MyWidget : public QWidget
|
|
* {
|
|
* public:
|
|
* MyWidget( QWidget* parent );
|
|
* ~MyWidget();
|
|
*
|
|
* ...
|
|
*
|
|
* private:
|
|
* KConfig *mGlobalConfig;
|
|
* QTreeView *mTreeView;
|
|
* Akonadi::EntityTreeViewStateSaver *mStateSaver;
|
|
* };
|
|
*
|
|
* MyWidget::MyWidget( QWidget *parent )
|
|
* : QWidget( parent )
|
|
* {
|
|
* mGlobalConfig = ...
|
|
* mTreeView = new QTreeView( this );
|
|
* ...
|
|
*
|
|
* mStateSaver = new Akonadi::EntityTreeViewStateSaver( mTreeView );
|
|
*
|
|
* KConfigGroup group( mGlobalConfig, "treeViewState" );
|
|
* mStateSaver->restoreState( group );
|
|
* }
|
|
*
|
|
* MyWidget::~MyWidget()
|
|
* {
|
|
* KConfigGroup group( mGlobalConfig, "treeViewState" );
|
|
* mStateSaver->saveState( group );
|
|
* }
|
|
*
|
|
* @endcode
|
|
*
|
|
* @author Volker Krause <vkrause@kde.org>
|
|
* @since 4.4
|
|
*
|
|
* @deprecated This class is deprecated. Use ETMViewStateSaver instead.
|
|
*/
|
|
class AKONADI_DEPRECATED_EXPORT EntityTreeViewStateSaver : public QObject
|
|
{
|
|
Q_OBJECT
|
|
|
|
public:
|
|
/**
|
|
* Creates a new state saver, for saving or restoring.
|
|
*
|
|
* @param view The QTreeView which state should be saved/restored.
|
|
*/
|
|
explicit EntityTreeViewStateSaver(QTreeView *view);
|
|
|
|
/**
|
|
* Destroys this state saver.
|
|
*/
|
|
~EntityTreeViewStateSaver();
|
|
|
|
/**
|
|
* Stores the current state in the given config group.
|
|
*
|
|
* @param configGroup Config file group into which the state is supposed to be stored.
|
|
*/
|
|
void saveState(KConfigGroup &configGroup) const;
|
|
|
|
/**
|
|
* Restore the state stored in @p configGroup as soon as the corresponding entities
|
|
* become available in the model (the model is populated asynchronously, which is the
|
|
* main reason why you want to use this class).
|
|
*
|
|
* @param configGroup Config file group containing a previously stored EntityTreeView state.
|
|
*/
|
|
void restoreState(const KConfigGroup &configGroup) const;
|
|
|
|
private:
|
|
//@cond PRIVATE
|
|
EntityTreeViewStateSaverPrivate *const d;
|
|
Q_PRIVATE_SLOT(d, void rowsInserted(const QModelIndex &, int, int))
|
|
Q_PRIVATE_SLOT(d, void restoreScrollBarState())
|
|
//@endcond
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|