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120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
/***************************************************************************
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qgslayoutundostack.cpp
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------------------------
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begin : July 2017
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copyright : (C) 2017 by Nyall Dawson
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email : nyall dot dawson at gmail dot com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgslayoutundostack.h"
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#include "qgslayout.h"
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#include "qgsproject.h"
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#include <QUndoStack>
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QgsLayoutUndoStack::QgsLayoutUndoStack( QgsLayout *layout )
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: mLayout( layout )
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, mUndoStack( new QUndoStack( layout ) )
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{
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connect( mUndoStack.get(), &QUndoStack::indexChanged, this, &QgsLayoutUndoStack::indexChanged );
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}
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void QgsLayoutUndoStack::beginMacro( const QString &commandText )
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{
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if ( mBlockedCommands == 0 )
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mUndoStack->beginMacro( commandText );
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}
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void QgsLayoutUndoStack::endMacro()
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{
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if ( mBlockedCommands == 0 )
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mUndoStack->endMacro();
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}
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void QgsLayoutUndoStack::beginCommand( QgsLayoutUndoObjectInterface *object, const QString &commandText, int id )
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{
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if ( !object )
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{
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return;
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}
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mActiveCommands.emplace_back( std::unique_ptr< QgsAbstractLayoutUndoCommand >( object->createCommand( commandText, id, nullptr ) ) );
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mActiveCommands.back()->saveBeforeState();
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}
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void QgsLayoutUndoStack::endCommand()
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{
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if ( mActiveCommands.empty() )
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return;
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mActiveCommands.back()->saveAfterState();
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if ( mBlockedCommands == 0 && mActiveCommands.back()->containsChange() ) //protect against empty commands
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{
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mUndoStack->push( mActiveCommands.back().release() );
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mLayout->project()->setDirty( true );
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}
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mActiveCommands.pop_back();
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}
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void QgsLayoutUndoStack::cancelCommand()
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{
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if ( mActiveCommands.empty() )
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return;
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mActiveCommands.pop_back();
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}
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QUndoStack *QgsLayoutUndoStack::stack()
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{
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return mUndoStack.get();
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}
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void QgsLayoutUndoStack::notifyUndoRedoOccurred( QgsLayoutItem *item )
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{
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mUndoRedoOccurredItemUuids.insert( item->uuid() );
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}
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void QgsLayoutUndoStack::blockCommands( bool blocked )
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{
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if ( blocked )
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{
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mBlockedCommands++;
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}
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else
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{
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if ( mBlockedCommands > 0 )
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mBlockedCommands--;
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}
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}
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bool QgsLayoutUndoStack::isBlocked() const
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{
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return mBlockedCommands > 0;
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}
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void QgsLayoutUndoStack::push( QUndoCommand *cmd )
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{
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if ( mBlockedCommands > 0 )
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delete cmd;
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else
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mUndoStack->push( cmd );
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}
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void QgsLayoutUndoStack::indexChanged()
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{
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if ( mUndoRedoOccurredItemUuids.empty() )
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return;
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emit undoRedoOccurredForItems( mUndoRedoOccurredItemUuids );
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mUndoRedoOccurredItemUuids.clear();
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}
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