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| |
| #ifndef QABSTRACTITEMMODEL_P_H |
| #define QABSTRACTITEMMODEL_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of QAbstractItemModel*. This header file may change from version |
| // to version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| // |
| |
| #include "private/qobject_p.h" |
| #include "QtCore/qstack.h" |
| #include "QtCore/qset.h" |
| #include "QtCore/qhash.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QPersistentModelIndexData |
| { |
| public: |
| QPersistentModelIndexData() : model(0) {} |
| QPersistentModelIndexData(const QModelIndex &idx) : index(idx), model(idx.model()) {} |
| QModelIndex index; |
| QAtomicInt ref; |
| const QAbstractItemModel *model; |
| static QPersistentModelIndexData *create(const QModelIndex &index); |
| static void destroy(QPersistentModelIndexData *data); |
| }; |
| |
| class Q_CORE_EXPORT QAbstractItemModelPrivate : public QObjectPrivate |
| { |
| Q_DECLARE_PUBLIC(QAbstractItemModel) |
| |
| public: |
| QAbstractItemModelPrivate() : QObjectPrivate(), supportedDragActions(-1), roleNames(defaultRoleNames()) {} |
| void removePersistentIndexData(QPersistentModelIndexData *data); |
| void movePersistentIndexes(const QVector<QPersistentModelIndexData *> &indexes, int change, const QModelIndex &parent, Qt::Orientation orientation); |
| void rowsAboutToBeInserted(const QModelIndex &parent, int first, int last); |
| void rowsInserted(const QModelIndex &parent, int first, int last); |
| void rowsAboutToBeRemoved(const QModelIndex &parent, int first, int last); |
| void rowsRemoved(const QModelIndex &parent, int first, int last); |
| void columnsAboutToBeInserted(const QModelIndex &parent, int first, int last); |
| void columnsInserted(const QModelIndex &parent, int first, int last); |
| void columnsAboutToBeRemoved(const QModelIndex &parent, int first, int last); |
| void columnsRemoved(const QModelIndex &parent, int first, int last); |
| static QAbstractItemModel *staticEmptyModel(); |
| static bool variantLessThan(const QVariant &v1, const QVariant &v2); |
| |
| void itemsAboutToBeMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation); |
| void itemsMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation); |
| bool allowMove(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation); |
| |
| inline QModelIndex createIndex(int row, int column, void *data = 0) const { |
| return q_func()->createIndex(row, column, data); |
| } |
| |
| inline QModelIndex createIndex(int row, int column, int id) const { |
| return q_func()->createIndex(row, column, id); |
| } |
| |
| inline bool indexValid(const QModelIndex &index) const { |
| return (index.row() >= 0) && (index.column() >= 0) && (index.model() == q_func()); |
| } |
| |
| inline void invalidatePersistentIndexes() { |
| foreach (QPersistentModelIndexData *data, persistent.indexes) { |
| data->index = QModelIndex(); |
| data->model = 0; |
| } |
| persistent.indexes.clear(); |
| } |
| |
| /*! |
| \internal |
| clean the QPersistentModelIndex relative to the index if there is one. |
| To be used before an index is invalided |
| */ |
| inline void invalidatePersistentIndex(const QModelIndex &index) { |
| QHash<QModelIndex, QPersistentModelIndexData *>::iterator it = persistent.indexes.find(index); |
| if(it != persistent.indexes.end()) { |
| QPersistentModelIndexData *data = *it; |
| persistent.indexes.erase(it); |
| data->index = QModelIndex(); |
| data->model = 0; |
| } |
| } |
| |
| struct Change { |
| Change() : first(-1), last(-1) {} |
| Change(const Change &c) : parent(c.parent), first(c.first), last(c.last), needsAdjust(c.needsAdjust) {} |
| Change(const QModelIndex &p, int f, int l) : parent(p), first(f), last(l), needsAdjust(false) {} |
| QModelIndex parent; |
| int first, last; |
| |
| |
| // In cases such as this: |
| // - A |
| // - B |
| // - C |
| // - - D |
| // - - E |
| // - - F |
| // |
| // If B is moved to above E, C is the source parent in the signal and its row is 2. When the move is |
| // completed however, C is at row 1 and there is no row 2 at the same level in the model at all. |
| // The QModelIndex is adjusted to correct that in those cases before reporting it though the |
| // rowsMoved signal. |
| bool needsAdjust; |
| |
| bool isValid() { return first >= 0 && last >= 0; } |
| }; |
| QStack<Change> changes; |
| |
| struct Persistent { |
| Persistent() {} |
| QHash<QModelIndex, QPersistentModelIndexData *> indexes; |
| QStack<QVector<QPersistentModelIndexData *> > moved; |
| QStack<QVector<QPersistentModelIndexData *> > invalidated; |
| void insertMultiAtEnd(const QModelIndex& key, QPersistentModelIndexData *data); |
| } persistent; |
| |
| Qt::DropActions supportedDragActions; |
| |
| QHash<int,QByteArray> roleNames; |
| static const QHash<int,QByteArray> &defaultRoleNames(); |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QABSTRACTITEMMODEL_P_H |