qgslayermetadataresultsmodel.h

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/***************************************************************************
  qgslayermetadataresultsmodel.h - QgsLayerMetadataResultsModel
 
 ---------------------
 begin                : 1.9.2022
 copyright            : (C) 2022 by ale
 email                : [your-email-here]
 ***************************************************************************
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSLAYERMETADATARESULTSMODEL_H
#define QGSLAYERMETADATARESULTSMODEL_H
 
#include <QAbstractTableModel>
#include <QObject>
#include <QThread>
#include "qgis_gui.h"
#include "qgsabstractlayermetadataprovider.h"
 
class QgsFeedback;
 
 
 
#ifndef SIP_RUN
 
class QgsMetadataResultsFetcher: public QObject
{
    Q_OBJECT
 
  public:
 
    QgsMetadataResultsFetcher( const QgsAbstractLayerMetadataProvider *metadataProvider, const QgsMetadataSearchContext &searchContext, QgsFeedback *feedback );
 
    void fetchMetadata( );
 
  signals:
 
    void resultsReady( const QgsLayerMetadataSearchResults &results );
 
  private:
 
    const QgsAbstractLayerMetadataProvider *mLayerMetadataProvider = nullptr;
    QgsMetadataSearchContext mSearchContext;
    QgsFeedback *mFeedback;
};
 
#endif
 
 
class GUI_EXPORT QgsLayerMetadataResultsModel : public QAbstractTableModel
{
    Q_OBJECT
 
  public:
 
    explicit QgsLayerMetadataResultsModel( const QgsMetadataSearchContext &searchContext, QObject *parent = nullptr );
 
    ~QgsLayerMetadataResultsModel();
 
 
    // QAbstractTableModel interface
 
    int rowCount( const QModelIndex &parent ) const override;
    int columnCount( const QModelIndex &parent ) const override;
    QVariant data( const QModelIndex &index, int role ) const override;
    QVariant headerData( int section, Qt::Orientation orientation, int role ) const override;
 
    void reload( );
 
    void reloadAsync( );
 
    enum Roles
    {
      Metadata = Qt::ItemDataRole::UserRole
    };
 
    enum Sections
    {
      Identifier,
      Title,
      Abstract,
      DataProviderName,
      GeometryType,
    };
 
  public slots:
 
    void resultsReady( const QgsLayerMetadataSearchResults &results );
 
    void cancel();
 
  signals:
 
    void progressChanged( int progress );
 
  private:
 
    std::unique_ptr<QgsFeedback> mFeedback;
    QgsLayerMetadataSearchResults mResult;
    QgsMetadataSearchContext mSearchContext;
    std::vector<std::unique_ptr<QgsMetadataResultsFetcher>> mWorkers;
    std::vector<std::unique_ptr<QThread>> mWorkerThreads;
 
};
 
#endif // QGSLAYERMETADATARESULTSMODEL_H