qgsfeaturelistview.h

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/***************************************************************************
     QgsAttributeListView.h
     --------------------------------------
    Date                 : Jan 2012
    Copyright            : (C) 2013 Matthias Kuhn
    Email                : matthias at opengis dot ch
 ***************************************************************************
 *                                                                         *
 *   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 QGSFEATURELISTVIEW_H
#define QGSFEATURELISTVIEW_H
 
#include "qgis_gui.h"
#include "qgis_sip.h"
#include "qgsfeature.h"
 
#include <QListView>
#include <QTimer>
#include <qdebug.h>
 
class QgsAttributeTableFilterModel;
class QgsFeatureListModel;
class QgsFeatureSelectionModel;
class QgsAttributeTableModel;
class QgsIFeatureSelectionManager;
class QgsVectorLayer;
class QgsVectorLayerCache;
class QgsFeatureListViewDelegate;
class QRect;
class QgsActionMenu;

class GUI_EXPORT QgsFeatureListView : public QListView
{
    Q_OBJECT
 
  public:

    explicit QgsFeatureListView( QWidget *parent SIP_TRANSFERTHIS = nullptr );

    QgsVectorLayerCache *layerCache();
 
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Woverloaded-virtual"
#endif

    virtual void setModel( QgsFeatureListModel *featureListModel );
#ifdef __clang__
#pragma clang diagnostic pop
#endif

    QgsFeatureListModel *featureListModel() { return mModel; }

    bool setDisplayExpression( const QString &displayExpression );

    const QString displayExpression() const;

    QString parserErrorString();

    QgsFeatureIds currentEditSelection();

    void setCurrentFeatureEdited( bool state );

    void setFeatureSelectionManager( QgsIFeatureSelectionManager *featureSelectionManager );
 
  protected:
    void mouseMoveEvent( QMouseEvent *event ) override;
    void mousePressEvent( QMouseEvent *event ) override;
    void mouseReleaseEvent( QMouseEvent *event ) override;
    void keyPressEvent( QKeyEvent *event ) override;
    void contextMenuEvent( QContextMenuEvent *event ) override;
 
  signals:

    void currentEditSelectionChanged( QgsFeature &feat );

    void currentEditSelectionProgressChanged( int progress, int count );

    void displayExpressionChanged( const QString &expression );

    void aboutToChangeEditSelection( bool &ok ) SIP_SKIP;

    void willShowContextMenu( QgsActionMenu *menu, const QModelIndex &atIndex );
 
  public slots:

    void setEditSelection( const QgsFeatureIds &fids );

    void setEditSelection( const QModelIndex &index, QItemSelectionModel::SelectionFlags command );

    void selectAll() override;
 
    void repaintRequested( const QModelIndexList &indexes );
    void repaintRequested();

    void editFirstFeature() { editOtherFeature( First ); }

    void editNextFeature() { editOtherFeature( Next ); }

    void editPreviousFeature() { editOtherFeature( Previous ); }

    void editLastFeature() { editOtherFeature( Last ); }
 
 
  private slots:
    void editSelectionChanged( const QItemSelection &selected, const QItemSelection &deselected );

    void ensureEditSelection( bool inSelection = false );
 
  private:
    void selectRow( const QModelIndex &index, bool anchor );
 
    void updateEditSelection( bool inSelection = false );
 
    enum PositionInList
    {
      First,
      Next,
      Previous,
      Last
    };
 
    void editOtherFeature( PositionInList positionInList );
 
 
    QgsFeatureListModel *mModel = nullptr;
    QItemSelectionModel *mCurrentEditSelectionModel = nullptr;
    QgsFeatureSelectionModel *mFeatureSelectionModel = nullptr;
    QgsIFeatureSelectionManager *mOwnedFeatureSelectionManager = nullptr;
    QgsIFeatureSelectionManager *mFeatureSelectionManager = nullptr;
    QgsFeatureListViewDelegate *mItemDelegate = nullptr;
 
    enum class DragMode
    {
      Inactive,
      ExpandSelection,
      MoveSelection
    };
 
    DragMode mDragMode = DragMode::Inactive;
 
    int mRowAnchor = 0;
    QItemSelectionModel::SelectionFlags mCtrlDragSelectionFlag;
 
    QTimer mUpdateEditSelectionTimerWithSelection;
    QTimer mUpdateEditSelectionTimerWithoutSelection;
 
    QgsFeatureId mLastEditSelectionFid;
 
    friend class QgsDualView;
};
 
#endif