qgsvaluerelationwidgetwrapper.h

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/***************************************************************************
    qgsvaluerelationwidgetwrapper.h
     --------------------------------------
    Date                 : 5.1.2014
    Copyright            : (C) 2014 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 QGSVALUERELATIONWIDGETWRAPPER_H
#define QGSVALUERELATIONWIDGETWRAPPER_H

#include "qgseditorwidgetwrapper.h"
#include "qgsvaluerelationfieldformatter.h"
#include "qgis_gui.h"

class QTableWidget;
class QComboBox;
class QLineEdit;

SIP_NO_FILE

class QgsValueRelationWidgetFactory;

class GUI_EXPORT QgsValueRelationWidgetWrapper : public QgsEditorWidgetWrapper
{
    Q_OBJECT

  public:

    explicit QgsValueRelationWidgetWrapper( QgsVectorLayer *layer, int fieldIdx, QWidget *editor = nullptr, QWidget *parent = nullptr );

    QVariant value() const override;

    void showIndeterminateState() override;

    void setEnabled( bool enabled ) override;

  protected:
    QWidget *createWidget( QWidget *parent ) override;
    void initWidget( QWidget *editor ) override;
    bool valid() const override;

  public slots:

    void setValue( const QVariant &value ) override;

    void widgetValueChanged( const QString &attribute, const QVariant &newValue, bool attributeChanged );

    void setFeature( const QgsFeature &feature ) override;


  private:

    int columnCount() const;

    QVariant::Type fkType() const;

    void populate( );

    QComboBox *mComboBox = nullptr;
    QTableWidget *mTableWidget = nullptr;
    QLineEdit *mLineEdit = nullptr;

    QgsValueRelationFieldFormatter::ValueRelationCache mCache;
    QgsVectorLayer *mLayer = nullptr;

    bool mEnabled = true;
    QString mExpression;

    friend class QgsValueRelationWidgetFactory;
    friend class TestQgsValueRelationWidgetWrapper;
};

#endif // QGSVALUERELATIONWIDGETWRAPPER_H