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 "qgis.h"
#include <QMap>
#include <QVariant>

class QgsVectorLayer;
class QgsField;

#include "qgswidgetwrapper.h"
#include "qgis_gui.h"

class GUI_EXPORT QgsEditorWidgetWrapper : public QgsWidgetWrapper
{
    Q_OBJECT

    Q_PROPERTY( bool constraintResultVisible READ constraintResultVisible WRITE setConstraintResultVisible NOTIFY constraintResultVisibleChanged )
    Q_PROPERTY( ConstraintResult constraintResult READ constraintResult NOTIFY constraintStatusChanged )

  public:

    enum ConstraintResult
    {
      ConstraintResultPass = 0, 
      ConstraintResultFailHard, 
      ConstraintResultFailSoft, 
    };

    explicit QgsEditorWidgetWrapper( QgsVectorLayer *vl, int fieldIdx, QWidget *editor = nullptr, QWidget *parent SIP_TRANSFERTHIS = nullptr );

    virtual QVariant value() const = 0;

    int fieldIdx() const;

    QgsField field() const;

    QVariant defaultValue() const;

    static QgsEditorWidgetWrapper *fromWidget( QWidget *widget );

    static bool isInTable( const QWidget *parent );

    void setEnabled( bool enabled ) override;

    virtual void showIndeterminateState() {}

    void updateConstraint( const QgsFeature &featureContext, QgsFieldConstraints::ConstraintOrigin constraintOrigin = QgsFieldConstraints::ConstraintOriginNotSet );

    void updateConstraint( const QgsVectorLayer *layer, int index, const QgsFeature &feature, QgsFieldConstraints::ConstraintOrigin constraintOrigin = QgsFieldConstraints::ConstraintOriginNotSet );

    bool isValidConstraint() const;

    bool isBlockingCommit() const;

    QString constraintFailureReason() const;

    virtual void setHint( const QString &hintText );

    ConstraintResult constraintResult() const;

    bool constraintResultVisible() const;

    void setConstraintResultVisible( bool constraintResultVisible );

  signals:

    void valueChanged( const QVariant &value );

    void constraintStatusChanged( const QString &constraint, const QString &desc, const QString &err, QgsEditorWidgetWrapper::ConstraintResult status );

    void constraintResultVisibleChanged( bool visible );

  public slots:

    void setFeature( const QgsFeature &feature ) override;

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

    void emitValueChanged();

  protected:

    virtual void updateConstraintWidgetStatus();

  private:

    bool mValidConstraint;

    bool mIsBlockingCommit;

    QString mConstraintFailureReason;

    ConstraintResult mConstraintResult = ConstraintResultPass;

    bool mConstraintResultVisible = false;

    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