qgssearchwidgetwrapper.h

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/***************************************************************************
    qgssearchwidgetwrapper.h
     --------------------------------------
    Date                 : 31.5.2015
    Copyright            : (C) 2015 Karolina Alexiou (carolinux)
    Email                : carolinegr at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   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 QGSSEARCHWIDGETWRAPPER_H
#define QGSSEARCHWIDGETWRAPPER_H

#include <QObject>
#include "qgis_sip.h"
#include <QMap>
#include <QVariant>

class QgsVectorLayer;
class QgsField;

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

#ifdef SIP_RUN
% MappedType QList<QgsSearchWidgetWrapper::FilterFlag>
{
  % TypeHeaderCode
#include <QList>
  % End

  % ConvertFromTypeCode
  // Create the list.
  PyObject *l;

  if ( ( l = PyList_New( sipCpp->size() ) ) == NULL )
    return NULL;

  // Set the list elements.
  QList<QgsSearchWidgetWrapper::FilterFlag>::iterator it = sipCpp->begin();
  for ( int i = 0; it != sipCpp->end(); ++it, ++i )
  {
    PyObject *tobj;

    if ( ( tobj = sipConvertFromEnum( *it, sipType_QgsSearchWidgetWrapper_FilterFlag ) ) == NULL )
    {
      Py_DECREF( l );
      return NULL;
    }
    PyList_SET_ITEM( l, i, tobj );
  }

  return l;
  % End

  % ConvertToTypeCode
  // Check the type if that is all that is required.
  if ( sipIsErr == NULL )
    return PyList_Check( sipPy );

  QList<QgsSearchWidgetWrapper::FilterFlag> *qlist = new QList<QgsSearchWidgetWrapper::FilterFlag>;

  for ( int i = 0; i < PyList_GET_SIZE( sipPy ); ++i )
  {
    *qlist << ( QgsSearchWidgetWrapper::FilterFlag )SIPLong_AsLong( PyList_GET_ITEM( sipPy, i ) );
  }

  *sipCppPtr = qlist;
  return sipGetState( sipTransferObj );
  % End
};
#endif

class GUI_EXPORT QgsSearchWidgetWrapper : public QgsWidgetWrapper
{
    Q_OBJECT
  public:

    enum FilterFlag
    {
      EqualTo = 1 << 1, 
      NotEqualTo = 1 << 2, 
      GreaterThan = 1 << 3, 
      LessThan = 1 << 4, 
      GreaterThanOrEqualTo = 1 << 5, 
      LessThanOrEqualTo = 1 << 6, 
      Between = 1 << 7, 
      CaseInsensitive = 1 << 8, 
      Contains = 1 << 9, 
      DoesNotContain = 1 << 10, 
      IsNull = 1 << 11, 
      IsNotBetween = 1 << 12, 
      IsNotNull = 1 << 13, 
      StartsWith = 1 << 14, 
      EndsWith = 1 << 15, 
    };
    Q_DECLARE_FLAGS( FilterFlags, FilterFlag )

    
    static QList< QgsSearchWidgetWrapper::FilterFlag > exclusiveFilterFlags();

    static QList< QgsSearchWidgetWrapper::FilterFlag > nonExclusiveFilterFlags();

    static QString toString( QgsSearchWidgetWrapper::FilterFlag flag );

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

    virtual FilterFlags supportedFlags() const;

    virtual FilterFlags defaultFlags() const;

    virtual QString expression() const = 0;

    virtual bool applyDirectly() = 0;

    // TODO QGIS 4.0 - make pure virtual
    virtual QString createExpression( FilterFlags flags ) const { Q_UNUSED( flags ) return QStringLiteral( "TRUE" ); }

    QString createFieldIdentifier() const;

    QString aggregate() const;

    void setAggregate( const QString &aggregate );

  public slots:

    virtual void clearWidget() {}

    void setEnabled( bool enabled ) override { Q_UNUSED( enabled ) }

  signals:

    void expressionChanged( const QString &exp );

    void valueChanged();

    void valueCleared();

  protected slots:

    virtual void setExpression( const QString &expression ) = 0;

    void setFeature( const QgsFeature &feature ) override;

  protected:
    void clearExpression();

    QString mExpression;
    int mFieldIdx;

  private:
    QString mAggregate;
    QgsRelation mAggregateRelation;
};
// We'll use this class inside a QVariant in the widgets properties
Q_DECLARE_METATYPE( QgsSearchWidgetWrapper * )

Q_DECLARE_OPERATORS_FOR_FLAGS( QgsSearchWidgetWrapper::FilterFlags )

#endif // QGSSEARCHWIDGETWRAPPER_H