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53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#pragma once
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#include <QUndoCommand>
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class CommandHierarchyItemToggleIsVisible
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: public QUndoCommand
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{
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public:
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void undo() override;
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void redo() override;
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// IMPORTANT: We DON'T want this command to support mergeWith().
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// Otherwise we leave commands on the undo stack that have no
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// effect (NOOP).
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//
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// To avoid the NOOPs, we can either:
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//
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// (1) Delete the NOPs from the undo stack.
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// or
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// (2) NOT support mergeWith().
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//
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// The problem with (1) is that it only allows odd number of
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// state changes to be undoable. (2) is more consistent
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// by making all state changes undoable.
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static void Push(UndoStack* stack,
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HierarchyWidget* hierarchy,
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const HierarchyItemRawPtrList& items);
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private:
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CommandHierarchyItemToggleIsVisible(UndoStack* stack,
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HierarchyWidget* hierarchy,
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const HierarchyItemRawPtrList& items);
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void SetIsVisible(bool isVisible);
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UndoStack* m_stack;
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HierarchyWidget* m_hierarchy;
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EntityHelpers::EntityIdList m_ids;
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bool m_toIsVisible;
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};
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