KDChartDatasetProxyModel.h

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/****************************************************************************
**
** This file is part of the KD Chart library.
**
** SPDX-FileCopyrightText: 2001 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
**
** SPDX-License-Identifier: MIT
**
****************************************************************************/
 
#ifndef KDCHARTDATASETPROXYMODEL_H
#define KDCHARTDATASETPROXYMODEL_H
 
#include <QSortFilterProxyModel>
#include <QVector>
 
#include "kdchart_export.h"
 
namespace KDChart {
 
class IndexOutOfBoundsException;
 
typedef QVector<int> DatasetDescriptionVector;
 
class KDCHART_EXPORT DatasetProxyModel : public QSortFilterProxyModel
{
    Q_OBJECT
public:
    explicit DatasetProxyModel(QObject *parent = nullptr);
 
    QModelIndex buddy(const QModelIndex &index) const override;
 
    Qt::ItemFlags flags(const QModelIndex &index) const override;
 
    QModelIndex index(int row, int column,
                      const QModelIndex &parent = QModelIndex()) const override;
    QModelIndex parent(const QModelIndex &child) const override;
 
    QModelIndex mapFromSource(const QModelIndex &sourceIndex) const override;
 
    QModelIndex mapToSource(const QModelIndex &proxyIndex) const override;
 
    QVariant data(const QModelIndex &index, int role) const override;
 
    bool setData(const QModelIndex &index, const QVariant &value, int role) override;
 
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
 
    void setSourceModel(QAbstractItemModel *sourceModel) override;
 
    void setSourceRootIndex(const QModelIndex &rootIdx);
 
public Q_SLOTS:
    void resetDatasetDescriptions();
 
    void setDatasetColumnDescriptionVector(const DatasetDescriptionVector &columnConfig);
 
    void setDatasetRowDescriptionVector(const DatasetDescriptionVector &rowConfig);
 
    void setDatasetDescriptionVectors(
        const DatasetDescriptionVector &rowConfig,
        const DatasetDescriptionVector &columnConfig);
 
    // FIXME: add convenience methods to configure common dataset
    // selections (like rectangular areas etc)
 
protected:
    bool filterAcceptsColumn(int sourceColumn,
                             const QModelIndex &) const override;
 
    bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const override;
 
private:
    int mapProxyColumnToSource(const int &proxyColumn) const;
 
    int mapSourceColumnToProxy(const int &sourceColumn) const;
 
    int mapProxyRowToSource(const int &proxyRow) const;
 
    int mapSourceRowToProxy(const int &sourceRow) const;
 
    void initializeDatasetDecriptors(
        const DatasetDescriptionVector &inConfiguration,
        int sourceCount,
        DatasetDescriptionVector &outSourceToProxyMap,
        DatasetDescriptionVector &outProxyToSourceMap);
 
    DatasetDescriptionVector mColSrcToProxyMap;
    DatasetDescriptionVector mColProxyToSrcMap;
    DatasetDescriptionVector mRowSrcToProxyMap;
    DatasetDescriptionVector mRowProxyToSrcMap;
 
    int mProxyRowCount = 0;
    int mProxyColumnCount = 0;
    QModelIndex mRootIndex;
};
}
 
#endif