126 lines
4.6 KiB
C++
126 lines
4.6 KiB
C++
/* This file is part of Clementine.
|
|
Copyright 2010, David Sansome <me@davidsansome.com>
|
|
|
|
Clementine is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Clementine is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Clementine. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef MERGEDPROXYMODEL_H
|
|
#define MERGEDPROXYMODEL_H
|
|
|
|
#include <QAbstractProxyModel>
|
|
|
|
#include <boost/multi_index_container.hpp>
|
|
#include <boost/multi_index/member.hpp>
|
|
#include <boost/multi_index/ordered_index.hpp>
|
|
#include <boost/multi_index/hashed_index.hpp>
|
|
|
|
using boost::multi_index::multi_index_container;
|
|
using boost::multi_index::indexed_by;
|
|
using boost::multi_index::hashed_unique;
|
|
using boost::multi_index::ordered_unique;
|
|
using boost::multi_index::tag;
|
|
using boost::multi_index::member;
|
|
using boost::multi_index::identity;
|
|
|
|
std::size_t hash_value(const QModelIndex& index);
|
|
|
|
class MergedProxyModel : public QAbstractProxyModel {
|
|
Q_OBJECT
|
|
|
|
public:
|
|
MergedProxyModel(QObject* parent = 0);
|
|
~MergedProxyModel();
|
|
|
|
// Make another model appear as a child of the given item in the source model.
|
|
void AddSubModel(const QModelIndex& source_parent, QAbstractItemModel* submodel);
|
|
void RemoveSubModel(const QModelIndex& source_parent);
|
|
|
|
// Find the item in the source model that is the parent of the model
|
|
// containing proxy_index. If proxy_index is in the source model, then
|
|
// this just returns mapToSource(proxy_index).
|
|
QModelIndex FindSourceParent(const QModelIndex& proxy_index) const;
|
|
|
|
// QAbstractItemModel
|
|
QModelIndex index(int row, int column, const QModelIndex &parent) const;
|
|
QModelIndex parent(const QModelIndex &child) const;
|
|
int rowCount(const QModelIndex &parent) const;
|
|
int columnCount(const QModelIndex &parent) const;
|
|
QVariant data(const QModelIndex &proxyIndex, int role = Qt::DisplayRole) const;
|
|
bool hasChildren(const QModelIndex &parent) const;
|
|
QMap<int, QVariant> itemData(const QModelIndex &proxyIndex) const;
|
|
Qt::ItemFlags flags(const QModelIndex &index) const;
|
|
bool setData(const QModelIndex &index, const QVariant &value, int role);
|
|
QStringList mimeTypes() const;
|
|
QMimeData* mimeData(const QModelIndexList &indexes) const;
|
|
bool canFetchMore(const QModelIndex &parent) const;
|
|
void fetchMore(const QModelIndex& parent);
|
|
|
|
// QAbstractProxyModel
|
|
// Note that these implementations of map{To,From}Source will not always
|
|
// give you an index in sourceModel(), you might get an index in one of the
|
|
// child models instead.
|
|
QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
|
|
QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
|
|
void setSourceModel(QAbstractItemModel *sourceModel);
|
|
|
|
signals:
|
|
void SubModelReset(const QModelIndex& root, QAbstractItemModel* model);
|
|
|
|
private slots:
|
|
void SourceModelReset();
|
|
void SubModelReset();
|
|
|
|
void RowsAboutToBeInserted(const QModelIndex& source_parent, int start, int end);
|
|
void RowsInserted(const QModelIndex& source_parent, int start, int end);
|
|
void RowsAboutToBeRemoved(const QModelIndex& source_parent, int start, int end);
|
|
void RowsRemoved(const QModelIndex& source_parent, int start, int end);
|
|
void DataChanged(const QModelIndex& top_left, const QModelIndex& bottom_right);
|
|
|
|
void LayoutAboutToBeChanged();
|
|
void LayoutChanged();
|
|
|
|
private:
|
|
QModelIndex GetActualSourceParent(const QModelIndex& source_parent,
|
|
QAbstractItemModel* model) const;
|
|
QAbstractItemModel* GetModel(const QModelIndex& source_index) const;
|
|
void DeleteAllMappings();
|
|
|
|
struct Mapping {
|
|
Mapping(const QModelIndex& _source_index)
|
|
: source_index(_source_index) {}
|
|
|
|
QModelIndex source_index;
|
|
};
|
|
|
|
struct tag_by_source {};
|
|
struct tag_by_pointer {};
|
|
typedef multi_index_container<
|
|
Mapping*,
|
|
indexed_by<
|
|
hashed_unique<tag<tag_by_source>,
|
|
member<Mapping, QModelIndex, &Mapping::source_index> >,
|
|
ordered_unique<tag<tag_by_pointer>,
|
|
identity<Mapping*> >
|
|
>
|
|
> MappingContainer;
|
|
|
|
MappingContainer mappings_;
|
|
QMap<QAbstractItemModel*, QPersistentModelIndex> merge_points_;
|
|
QAbstractItemModel* resetting_model_;
|
|
|
|
QMap<QAbstractItemModel*, QModelIndex> old_merge_points_;
|
|
};
|
|
|
|
#endif // MERGEDPROXYMODEL_H
|