qgseditorwidgetwrapper.h

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/***************************************************************************
    qgseditorwidgetwrapper.h
     --------------------------------------
    Date                 : 20.4.2013
    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 QGSEDITORWIDGETWRAPPER_H
#define QGSEDITORWIDGETWRAPPER_H

#include <QObject>
#include <QMap>
#include <QVariant>

class QgsVectorLayer;
class QgsField;

#include "qgseditorwidgetconfig.h"
#include "qgsattributeeditorcontext.h"
#include "qgswidgetwrapper.h"

class GUI_EXPORT QgsEditorWidgetWrapper : public QgsWidgetWrapper
{
    Q_OBJECT
  public:
    explicit QgsEditorWidgetWrapper( QgsVectorLayer* vl, int fieldIdx, QWidget* editor = nullptr, QWidget* parent = nullptr );

    virtual QVariant value() const = 0;

    int fieldIdx() const;

    QgsField field() const;

    QVariant defaultValue() const;

    static QgsEditorWidgetWrapper* fromWidget( QWidget* widget );

    virtual void setEnabled( bool enabled ) override;

    virtual void showIndeterminateState() {}

    void updateConstraint( const QgsFeature &featureContext );

    bool isValidConstraint() const;

  signals:
    void valueChanged( const QVariant& value );

    void constraintStatusChanged( const QString& constraint, const QString &desc, const QString& err, bool status );

  public slots:
    void setFeature( const QgsFeature& feature ) override;

    virtual void setValue( const QVariant& value ) = 0;

  protected slots:
    void valueChanged( const QString& value );

    void valueChanged( int value );

    void valueChanged( double value );

    void valueChanged( bool value );

    void valueChanged( qlonglong value );

    void valueChanged();

  protected:
    virtual void updateConstraintWidgetStatus( bool constraintValid );

  private:

    bool mValidConstraint;

    int mFieldIdx;
    QgsFeature mFeature;
    mutable QVariant mDefaultValue; // Cache default value, we don't want to retrieve different serial numbers if called repeatedly
};

// We'll use this class inside a QVariant in the widgets properties
Q_DECLARE_METATYPE( QgsEditorWidgetWrapper* )

#endif // QGSEDITORWIDGETWRAPPER_H