qgsattributetablefiltermodel.h

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/***************************************************************************
  QgsAttributeTableFilterModel.h - Filter Model for attribute table
  -------------------
         date                 : Feb 2009
         copyright            : (C) 2009 by Vita Cizek
         email                : weetya (at) gmail.com
 
 ***************************************************************************
 *                                                                         *
 *   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 QGSATTRIBUTETABLEFILTERMODEL_H
#define QGSATTRIBUTETABLEFILTERMODEL_H
 
#include <QSortFilterProxyModel>
#include <QModelIndex>
#include <QTimer>
 
#include "qgsattributetablemodel.h"
#include "qgsfeaturemodel.h"
#include "qgis_gui.h"
 
class QgsVectorLayerCache;
class QgsMapCanvas;
class QItemSelectionModel;
 
class GUI_EXPORT QgsAttributeTableFilterModel: public QSortFilterProxyModel, public QgsFeatureModel
{
    Q_OBJECT
 
  public:
 
    enum FilterMode
    {
      ShowAll,          
      ShowSelected,     
      ShowVisible,      
      ShowFilteredList, 
      ShowEdited        
    };
    Q_ENUM( FilterMode )
 
    
    enum ColumnType
    {
      ColumnTypeField,       
      ColumnTypeActionButton 
    };
    Q_ENUM( ColumnType )
 
    
    enum Role
    {
      TypeRole = QgsAttributeTableModel::UserRole 
    };
 
 
    QgsAttributeTableFilterModel( QgsMapCanvas *canvas, QgsAttributeTableModel *sourceModel, QObject *parent SIP_TRANSFERTHIS = nullptr );
 
    void setSourceModel( QgsAttributeTableModel *sourceModel );
 
    void setSelectedOnTop( bool selectedOnTop );
 
    bool selectedOnTop();
 
    virtual void setFilteredFeatures( const QgsFeatureIds &ids );
 
    QgsFeatureIds filteredFeatures();
 
    void setFilterMode( FilterMode filterMode );
 
    void disconnectFilterModeConnections();
 
    void connectFilterModeConnections( FilterMode filterMode );
 
    FilterMode filterMode() { return mFilterMode; }
 
    inline QgsVectorLayer *layer() const { return masterModel()->layer(); }
 
    inline QgsVectorLayerCache *layerCache() const { return masterModel()->layerCache(); }
 
    inline QgsAttributeTableModel *masterModel() const { return mTableModel; }
 
    QgsFeatureId rowToId( const QModelIndex &row );
 
    QModelIndex fidToIndex( QgsFeatureId fid ) override;
 
    QModelIndexList fidToIndexList( QgsFeatureId fid );
 
    inline QModelIndex mapToMaster( const QModelIndex &proxyIndex ) const { return mapToSource( proxyIndex ); }
 
    inline QModelIndex mapFromMaster( const QModelIndex &sourceIndex ) const { return mapFromSource( sourceIndex ); }
 
    QModelIndex mapToSource( const QModelIndex &proxyIndex ) const override;
 
    QModelIndex mapFromSource( const QModelIndex &sourceIndex ) const override;
 
    Qt::ItemFlags flags( const QModelIndex &index ) const override;
 
    void sort( int column, Qt::SortOrder order = Qt::AscendingOrder ) override;
 
    void sort( const QString &expression, Qt::SortOrder order = Qt::AscendingOrder );
 
    QString sortExpression() const;
 
    QgsMapCanvas *mapCanvas() const { return mCanvas; }
 
    QVariant data( const QModelIndex &index, int role ) const override;
 
    QVariant headerData( int section, Qt::Orientation orientation, int role ) const override;
 
    int actionColumnIndex() const;
 
    int columnCount( const QModelIndex &parent ) const override;
 
    void setAttributeTableConfig( const QgsAttributeTableConfig &config );
 
    void setFilterExpression( const QgsExpression &expression, const QgsExpressionContext &context );
 
  signals:
 
    void sortColumnChanged( int column, Qt::SortOrder order );
 
    void featuresFiltered();
 
    void visibleReloaded();
 
    void filterError( const QString &errorMessage );
 
  protected:
 
    bool filterAcceptsRow( int sourceRow, const QModelIndex &sourceParent ) const override;
 
    void generateListOfVisibleFeatures();
 
    bool lessThan( const QModelIndex &left, const QModelIndex &right ) const override;
 
  public slots:
 
    Q_DECL_DEPRECATED void extentsChanged();
 
    void filterFeatures();
 
  private slots:
    void selectionChanged();
    void onColumnsChanged();
    void reloadVisible();
    void onAttributeValueChanged( QgsFeatureId fid, int idx, const QVariant &value );
    void onGeometryChanged();
 
  private:
    QgsFeatureIds mFilteredFeatures;
    QgsMapCanvas *mCanvas = nullptr;
    FilterMode mFilterMode = FilterMode::ShowAll;
    bool mSelectedOnTop = false;
    QgsAttributeTableModel *mTableModel = nullptr;
 
    QgsAttributeTableConfig mConfig;
    QVector<int> mColumnMapping;
    QgsExpression mFilterExpression;
    QgsExpressionContext mFilterExpressionContext;
 
    int mapColumnToSource( int column ) const;
    int mapColumnFromSource( int column ) const;
 
    QTimer mReloadVisibleTimer;
    QTimer mFilterFeaturesTimer;
    void startTimedReloadVisible();
    void startTimedFilterFeatures();
};
 
#endif