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qgslayoutundostack.cpp
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qgslayoutundostack.cpp
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/***************************************************************************
qgslayoutundostack.cpp
------------------------
begin : July 2017
copyright : (C) 2017 by Nyall Dawson
email : nyall dot dawson at gmail dot com
***************************************************************************/
/***************************************************************************
* *
* 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 "qgslayoutundostack.h"
#include "qgslayout.h"
#include "qgsproject.h"
#include <QUndoStack>
QgsLayoutUndoStack::QgsLayoutUndoStack( QgsLayout *layout )
: mLayout( layout )
, mUndoStack( new QUndoStack( layout ) )
{
connect( mUndoStack.get(), &QUndoStack::indexChanged, this, &QgsLayoutUndoStack::indexChanged );
}
void QgsLayoutUndoStack::beginMacro( const QString &commandText )
{
mUndoStack->beginMacro( commandText );
}
void QgsLayoutUndoStack::endMacro()
{
mUndoStack->endMacro();
}
void QgsLayoutUndoStack::beginCommand( QgsLayoutUndoObjectInterface *object, const QString &commandText, int id )
{
if ( !object )
{
return;
}
mActiveCommands.emplace_back( std::unique_ptr< QgsAbstractLayoutUndoCommand >( object->createCommand( commandText, id, nullptr ) ) );
mActiveCommands.back()->saveBeforeState();
}
void QgsLayoutUndoStack::endCommand()
{
if ( mActiveCommands.empty() )
return;
mActiveCommands.back()->saveAfterState();
if ( mActiveCommands.back()->containsChange() ) //protect against empty commands
{
mUndoStack->push( mActiveCommands.back().release() );
mActiveCommands.pop_back();
mLayout->project()->setDirty( true );
}
}
void QgsLayoutUndoStack::cancelCommand()
{
if ( mActiveCommands.empty() )
return;
mActiveCommands.pop_back();
}
QUndoStack *QgsLayoutUndoStack::stack()
{
return mUndoStack.get();
}
void QgsLayoutUndoStack::notifyUndoRedoOccurred( QgsLayoutItem *item )
{
mUndoRedoOccurredItemUuids.insert( item->uuid() );
}
void QgsLayoutUndoStack::indexChanged()
{
if ( mUndoRedoOccurredItemUuids.empty() )
return;
emit undoRedoOccurredForItems( mUndoRedoOccurredItemUuids );
mUndoRedoOccurredItemUuids.clear();
}