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 "qgis_gui.h"
#include "qgseditorwidgetwrapper.h"
#include "qgstooltipcombobox.h"
#include "qgsvaluerelationfieldformatter.h"
 
#include <QTableWidget>
 
class QLineEdit;
class QgsValueRelationWidgetFactory;
class QgsFilterLineEdit;
 
SIP_NO_FILE


class QgsFilteredTableWidget : public QWidget
{
    Q_OBJECT
 
  public:
    QgsFilteredTableWidget( QWidget *parent, bool showSearch, bool displayGroupName );
 
    bool eventFilter( QObject *watched, QEvent *event ) override;

    QStringList selection() const;

    void checkItems( const QStringList &checked );

    void populate( QgsValueRelationFieldFormatter::ValueRelationCache cache );

    void setIndeterminateState();

    void setEnabledTable( const bool enabled );

    void setColumnCount( const int count );

    int rowCount() const { return mTableWidget->rowCount(); }
 
  signals:

    void itemChanged( QTableWidgetItem *item );
 
  private slots:
    void onTableWidgetCustomContextMenuRequested( const QPoint &pos );
    void onTableWidgetMenuActionSelectAllTriggered();
    void onTableWidgetMenuActionDeselectAllTriggered();
 
  private:
    void filterStringChanged( const QString &filterString );
    void itemChanged_p( QTableWidgetItem *item );
    QTableWidgetItem *item( const int row, const int column ) const { return mTableWidget->item( row, column ); }
 
    int mColumnCount = 1;
    QgsFilterLineEdit *mSearchWidget = nullptr;
    QTableWidget *mTableWidget = nullptr;
    bool mEnabledTable = true;
    QVector<QPair<QgsValueRelationFieldFormatter::ValueRelationItem, Qt::CheckState>> mCache;
    bool mDisplayGroupName = false;
 
    friend class TestQgsValueRelationWidgetWrapper;
};


 
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;
 
  public slots:
 
    void parentFormValueChanged( const QString &attribute, const QVariant &value ) override;
 
  protected:
    QWidget *createWidget( QWidget *parent ) override;
    void initWidget( QWidget *editor ) override;
    bool valid() const override;

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

    void setFeature( const QgsFeature &feature ) override;
 
  private slots:
    void emitValueChangedInternal( const QString &value );
 
  private:
    void updateValues( const QVariant &value, const QVariantList & = QVariantList() ) override;

    void updateValue( const QVariant &value, bool forceComboInsertion );

    int columnCount() const;

    QMetaType::Type fkType() const;

    void populate();
 
    QComboBox *mComboBox = nullptr;
    QgsFilteredTableWidget *mTableWidget = nullptr;
    QLineEdit *mLineEdit = nullptr;
    int mSubWidgetSignalBlocking = 0; 
 
    QgsValueRelationFieldFormatter::ValueRelationCache mCache;
 
    bool mEnabled = true;
    QString mExpression;
 
    friend class QgsValueRelationWidgetFactory;
    friend class TestQgsValueRelationWidgetWrapper;
};
 
#endif // QGSVALUERELATIONWIDGETWRAPPER_H