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35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
// Copyright (c) 2017-2024, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/blob/master/LICENSE.md
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#pragma once
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#include "ItemTree.hpp"
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#include <stack>
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namespace gui
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{
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class DepthFirstItemTree : public ItemTree
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{
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public:
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/// Tree traverse modes. In `PreOrder` mode a parent precedes it's children. In `PostOrder` mode, children
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/// precedes it's parent.
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enum class TraverseMode
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{
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PreOrder,
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PostOrder
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};
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explicit DepthFirstItemTree(gui::Item &root, TraverseMode mode = TraverseMode::PreOrder);
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[[nodiscard]] auto hasNext() const noexcept -> bool override;
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[[nodiscard]] auto getNext() noexcept -> gui::ItemNode override;
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private:
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std::stack<gui::ItemNode> nodes;
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TraverseMode mode;
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void constructPostOrder(gui::Item *item, int level);
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[[nodiscard]] auto getNextInPreOrder() -> gui::ItemNode;
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[[nodiscard]] auto getNextInPostOrder() -> gui::ItemNode;
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};
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} // namespace gui
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