qgstransactiongroup.h

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/***************************************************************************
  qgstransactiongroup.h - QgsTransactionGroup

 ---------------------
 begin                : 15.1.2016
 copyright            : (C) 2016 by Matthias Kuhn
 email                : [email protected]
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSTRANSACTIONGROUP_H
#define QGSTRANSACTIONGROUP_H

#include "qgis_core.h"
#include <QObject>
#include <QSet>
#include <memory>
#include "qgstransaction.h"

class QgsVectorLayer;

class CORE_EXPORT QgsTransactionGroup : public QObject
{
    Q_OBJECT
  public:

    explicit QgsTransactionGroup( QObject *parent = nullptr );

    bool addLayer( QgsVectorLayer *layer );

    QSet<QgsVectorLayer *> layers() const;

    bool modified() const;

    QString connString() const;

    QString providerKey() const;

    bool isEmpty() const;

  signals:

    void commitError( const QString &msg );

  private slots:
    void onEditingStarted();
    void onLayerDeleted();
    void onCommitChanges();
    void onRollback();

  private:
    bool mEditingStarting = false;
    bool mEditingStopping = false;

    void disableTransaction();

    QSet<QgsVectorLayer *> mLayers;
    std::unique_ptr<QgsTransaction> mTransaction;
    QString mConnString;
    QString mProviderKey;
};

#endif // QGSTRANSACTIONGROUP_H