cache_proxy_model.h

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#ifndef CACHE_PROXY_MODEL_H
#define CACHE_PROXY_MODEL_H
 
#include <config.h>
 
#include <QIdentityProxyModel>
#include <QStandardItemModel>

class CacheProxyModel : public QIdentityProxyModel
{
    Q_OBJECT
 
public:
    CacheProxyModel(QObject *parent = 0);

    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;

    Qt::ItemFlags flags(const QModelIndex &index) const override;

    QVariant headerData(int section, Qt::Orientation orientation,
                        int role = Qt::DisplayRole) const override;

    int rowCount(const QModelIndex &parent = QModelIndex()) const override;

    int columnCount(const QModelIndex &parent = QModelIndex()) const override;

    void setSourceModel(QAbstractItemModel *newSourceModel) override;
 
private:
    mutable QStandardItemModel cache;

    bool hasModel() const { return sourceModel() != &cache; }
 
private slots:
    void resetCacheModel();
};
#endif