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2cadb38719
This makes browsing more robust if our sqlite parser fails we will fallback to a sqlite query to retrieve the column names
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
#ifndef SQLITETABLEMODEL_H
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#define SQLITETABLEMODEL_H
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#include <QAbstractTableModel>
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#include <QStringList>
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class DBBrowserDB;
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class SqliteTableModel : public QAbstractTableModel
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{
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Q_OBJECT
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public:
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explicit SqliteTableModel(QObject *parent = 0, DBBrowserDB* db = 0, size_t chunkSize = 50000);
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void reset();
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int rowCount(const QModelIndex &parent = QModelIndex()) const;
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int totalRowCount() const;
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int columnCount(const QModelIndex &parent = QModelIndex()) const;
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QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
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QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
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bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole);
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bool canFetchMore(const QModelIndex &parent = QModelIndex()) const;
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void fetchMore(const QModelIndex &parent = QModelIndex());
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size_t queryMore(size_t offset);
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bool insertRows(int row, int count, const QModelIndex& parent = QModelIndex());
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bool removeRows(int row, int count, const QModelIndex& parent = QModelIndex());
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void setQuery(const QString& sQuery, bool dontClearHeaders = false);
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QString query() const { return m_sQuery; }
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void setTable(const QString& table);
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void setChunkSize(size_t chunksize);
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void sort(int column, Qt::SortOrder order = Qt::AscendingOrder);
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Qt::ItemFlags flags(const QModelIndex& index) const;
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bool valid() const { return m_valid; }
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bool isBinary(const QModelIndex& index) const;
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typedef QList<QByteArray> QByteArrayList;
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signals:
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public slots:
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void updateFilter(int column, const QString& value);
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private:
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void fetchData(unsigned int from, unsigned to);
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void clearCache();
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void buildQuery();
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QStringList getColumns(const QString sQuery);
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int getQueryRowCount();
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DBBrowserDB* m_db;
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int m_rowCount;
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QStringList m_headers;
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QList<QByteArrayList> m_data;
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QString m_sQuery;
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QString m_sTable;
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int m_iSortColumn;
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QString m_sSortOrder;
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QMap<int, QString> m_mWhere;
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/**
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* @brief m_chunkSize Size of the next chunk fetch more will try to fetch.
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* This value should be rather high, because our query
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* uses LIMIT and sqlite3 will still execute the whole query and
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* just skip the not wanted rows, but the execution will
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* still take nearly the same time as doing the query at all up
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* to that row count.
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*/
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size_t m_chunkSize;
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bool m_valid; //! tells if the current query is valid.
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};
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#endif // SQLITETABLEMODEL_H
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