alexpete
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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 CommandHierarchyItemToggleIsSelectable
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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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CommandHierarchyItemToggleIsSelectable(UndoStack* stack,
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HierarchyWidget* hierarchy,
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const HierarchyItemRawPtrList& items);
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void SetIsSelectable(bool isSelectable);
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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_toIsSelectable;
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};
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