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61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/*
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Copyright 2006-2023 The QElectroTech Team
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This file is part of QElectroTech.
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QElectroTech 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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QElectroTech is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LINKELEMENTCOMMAND_H
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#define LINKELEMENTCOMMAND_H
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#include <QUndoCommand>
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class Element;
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/**
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@brief The LinkElementCommand class
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This undo class manage link between elements.
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In the same instance of this class, we can link and unlink elements from an edited element
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This undo class support the merge.
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*/
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class LinkElementCommand : public QUndoCommand
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{
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public:
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LinkElementCommand(Element *element_, QUndoCommand *parent = nullptr);
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int id() const override {return 2;}
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bool mergeWith(const QUndoCommand *other) override;
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static bool isLinkable (Element *element_a, Element *element_b, bool already_linked = false);
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void setLink (const QList<Element *>& element_list);
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void setLink (Element *element_);
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void unlink (QList<Element *> element_list);
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void unlinkAll ();
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void undo() override;
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void redo() override;
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private:
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void setUpNewLink (const QList<Element *> &element_list, bool already_link);
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void makeLink (const QList <Element *> &element_list);
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private:
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Element *m_element;
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bool m_first_redo;
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QList<Element *> m_linked_before; //<Linked elements before this command, or when we call "undo"
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QList<Element *> m_linked_after; //<Linked elements after this command, or when we recall "redo"
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};
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#endif // LINKELEMENTCOMMAND_H
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