qgsorderbydialog.h

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/***************************************************************************
 qgsorderbydialog.h
 
 ---------------------
 begin                : 20.12.2015
 copyright            : (C) 2015 by Matthias Kuhn
 email                : matthias@opengis.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 QGSORDERBYDIALOG_H
#define QGSORDERBYDIALOG_H
 
#include "ui_qgsorderbydialogbase.h"
 
#include "qgis_gui.h"
#include "qgis_sip.h"
#include "qgsfeaturerequest.h"
#include "qgshelp.h"
 
#include <QDialog>
 
class QgsVectorLayer;

class GUI_EXPORT QgsOrderByDialog : public QDialog, private Ui::OrderByDialogBase
{
    Q_OBJECT
 
  public:
    QgsOrderByDialog( QgsVectorLayer *layer, QWidget *parent SIP_TRANSFERTHIS = nullptr );

    void setOrderBy( const QgsFeatureRequest::OrderBy &orderBy );

    QgsFeatureRequest::OrderBy orderBy();
 
  protected:
    bool eventFilter( QObject *obj, QEvent *e ) override;
 
  private slots:
    void onExpressionChanged( const QString &expression );
    void showHelp();
 
  private:
    void setRow( int row, const QgsFeatureRequest::OrderByClause &orderByClause );
 
    QgsVectorLayer *mLayer = nullptr;
};
 
#endif // QGSORDERBYDIALOG_H