62 lines
2.6 KiB
C++
62 lines
2.6 KiB
C++
// SPDX-License-Identifier: MIT
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#ifndef DBC_TREE_MODEL_H
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#define DBC_TREE_MODEL_H
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#include "tree_node.h"
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#include <QAbstractItemModel>
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/** Read-only model. Owns an immutable tree; all indexes expire on SetTree().
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* Use QPersistentModelIndex to observe reset invalidation. Call on the model thread.
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*/
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class DbcTreeModel : public QAbstractItemModel {
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public:
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/** @brief Display columns for frame and signal metadata. */
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enum Column { Name,
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CanId,
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PayloadLength,
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StartBit,
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BitLength,
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ByteOrder,
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Signed,
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Unit,
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Comment,
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ColumnCount };
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// Metadata roles apply on every column; inapplicable roles return invalid QVariant.
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/** @brief Typed metadata roles in addition to Qt display roles. */
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enum Role { NodeTypeRole = Qt::UserRole + 1,
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CanIdRole,
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PayloadLengthRole,
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StartBitRole,
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BitLengthRole,
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LittleEndianRole,
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SignedRole,
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UnitRole,
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CommentRole,
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ValueDescriptionsRole,
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ExtendedRole };
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/** @brief Create an empty read-only model. */
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explicit DbcTreeModel(QObject *parent = nullptr);
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/** @brief Replace the tree and invalidate indexes; reject roots with a parent or non-root type. */
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void SetTree(std::unique_ptr<TreeNode> root);
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/** @brief Return a child index; only column zero can have children. */
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QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
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/** @brief Return the parent in column zero, or an invalid index for frames. */
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QModelIndex parent(const QModelIndex &child) const override;
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/** @brief Return the child count, capped at the Qt integer limit. */
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int rowCount(const QModelIndex &parent = QModelIndex()) const override;
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/** @brief Return the fixed metadata column count for this model. */
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int columnCount(const QModelIndex &parent = QModelIndex()) const override;
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/** @brief Return display text or typed metadata for an index. */
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QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
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/** @brief Return horizontal display column titles. */
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QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
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/** @brief Allow selecting and enabling valid indexes without editing. */
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Qt::ItemFlags flags(const QModelIndex &index) const override;
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private:
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const TreeNode *Node(const QModelIndex &index) const;
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std::unique_ptr<TreeNode> m_root;
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};
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#endif
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