qgslayoutitemgroupundocommand.cpp

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/***************************************************************************
                          qgslayoutitemgroupundocommand.cpp
                          ---------------------------
    begin                : 2016-06-09
    copyright            : (C) 2016 by Sandro Santilli
    email                : strk at kbt dot io
***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
 
#include "qgslayoutitemgroupundocommand.h"
#include "qgslayoutitemgroup.h"
#include "qgslayout.h"
#include "qgsproject.h"
 
QgsLayoutItemGroupUndoCommand::QgsLayoutItemGroupUndoCommand( State s, QgsLayoutItemGroup *group, QgsLayout *layout, const QString &text, QUndoCommand *parent )
  : QUndoCommand( text, parent )
  , mGroupUuid( group->uuid() )
  , mLayout( layout )
  , mState( s )
{
  const QList< QgsLayoutItem * > items = group->items();
  for ( QgsLayoutItem *i : items )
  {
    mItemUuids.insert( i->uuid() );
  }
}
 
void QgsLayoutItemGroupUndoCommand::redo()
{
  if ( mFirstRun )
  {
    mFirstRun = false;
    return;
  }
  switchState();
}
 
void QgsLayoutItemGroupUndoCommand::undo()
{
  if ( mFirstRun )
  {
    mFirstRun = false;
    return;
  }
  switchState();
}
 
void QgsLayoutItemGroupUndoCommand::switchState()
{
  if ( mState == Grouped )
  {
    // ungroup
    QgsLayoutItemGroup *group = dynamic_cast< QgsLayoutItemGroup * >( mLayout->itemByUuid( mGroupUuid ) );
    Q_ASSERT_X( group, "QgsLayoutItemGroupUndoCommand::switchState", "Could not find group" );
    group->removeItems();
    mLayout->removeLayoutItemPrivate( group );
    mState = Ungrouped;
  }
  else //Ungrouped
  {
    // find group by uuid...
    QgsLayoutItemGroup *group = dynamic_cast< QgsLayoutItemGroup * >( mLayout->itemByUuid( mGroupUuid ) );
    if ( !group )
    {
      group = new QgsLayoutItemGroup( mLayout );
      mLayout->addLayoutItemPrivate( group );
    }
 
    for ( const QString &childUuid : qgis::as_const( mItemUuids ) )
    {
      QgsLayoutItem *childItem = mLayout->itemByUuid( childUuid );
      group->addItem( childItem );
    }
 
    mState = Grouped;
  }
  mLayout->project()->setDirty( true );
}