111 lines
4.3 KiB
C++
111 lines
4.3 KiB
C++
/* This file is part of Clementine.
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Copyright 2010, David Sansome <me@davidsansome.com>
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Clementine is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Clementine is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MERGEDPROXYMODEL_H
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#define MERGEDPROXYMODEL_H
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#include <memory>
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#include <QAbstractProxyModel>
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std::size_t hash_value(const QModelIndex& index);
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class MergedProxyModelPrivate;
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class MergedProxyModel : public QAbstractProxyModel {
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Q_OBJECT
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public:
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MergedProxyModel(QObject* parent = nullptr);
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~MergedProxyModel();
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// Make another model appear as a child of the given item in the source model.
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void AddSubModel(const QModelIndex& source_parent,
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QAbstractItemModel* submodel);
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void RemoveSubModel(const QModelIndex& source_parent);
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// Find the item in the source model that is the parent of the model
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// containing proxy_index. If proxy_index is in the source model, then
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// this just returns mapToSource(proxy_index).
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QModelIndex FindSourceParent(const QModelIndex& proxy_index) const;
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// QAbstractItemModel
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QModelIndex index(int row, int column, const QModelIndex& parent) const;
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QModelIndex parent(const QModelIndex& child) const;
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int rowCount(const QModelIndex& parent) const;
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int columnCount(const QModelIndex& parent) const;
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QVariant data(const QModelIndex& proxyIndex,
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int role = Qt::DisplayRole) const;
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bool hasChildren(const QModelIndex& parent) const;
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QMap<int, QVariant> itemData(const QModelIndex& proxyIndex) const;
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Qt::ItemFlags flags(const QModelIndex& index) const;
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bool setData(const QModelIndex& index, const QVariant& value, int role);
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QStringList mimeTypes() const;
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QMimeData* mimeData(const QModelIndexList& indexes) const;
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bool dropMimeData(const QMimeData* data, Qt::DropAction action, int row,
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int column, const QModelIndex& parent);
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bool canFetchMore(const QModelIndex& parent) const;
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void fetchMore(const QModelIndex& parent);
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// QAbstractProxyModel
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// Note that these implementations of map{To,From}Source will not always
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// give you an index in sourceModel(), you might get an index in one of the
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// child models instead.
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QModelIndex mapFromSource(const QModelIndex& sourceIndex) const;
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QModelIndex mapToSource(const QModelIndex& proxyIndex) const;
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void setSourceModel(QAbstractItemModel* sourceModel);
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// Convenience functions that call map{To,From}Source multiple times.
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QModelIndexList mapFromSource(const QModelIndexList& source_indexes) const;
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QModelIndexList mapToSource(const QModelIndexList& proxy_indexes) const;
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signals:
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void SubModelReset(const QModelIndex& root, QAbstractItemModel* model);
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private slots:
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void SourceModelReset();
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void SubModelReset();
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void RowsAboutToBeInserted(const QModelIndex& source_parent, int start,
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int end);
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void RowsInserted(const QModelIndex& source_parent, int start, int end);
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void RowsAboutToBeRemoved(const QModelIndex& source_parent, int start,
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int end);
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void RowsRemoved(const QModelIndex& source_parent, int start, int end);
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void DataChanged(const QModelIndex& top_left,
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const QModelIndex& bottom_right);
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void LayoutAboutToBeChanged();
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void LayoutChanged();
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private:
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QModelIndex GetActualSourceParent(const QModelIndex& source_parent,
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QAbstractItemModel* model) const;
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QAbstractItemModel* GetModel(const QModelIndex& source_index) const;
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void DeleteAllMappings();
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bool IsKnownModel(const QAbstractItemModel* model) const;
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QMap<QAbstractItemModel*, QPersistentModelIndex> merge_points_;
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QAbstractItemModel* resetting_model_;
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QMap<QAbstractItemModel*, QModelIndex> old_merge_points_;
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std::unique_ptr<MergedProxyModelPrivate> p_;
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};
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#endif // MERGEDPROXYMODEL_H
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