qgsquerybuilder.h

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/***************************************************************************
    qgsquerybuilder.h - query builder
     --------------------------------------
    Date                 : 2004-11-19
    Copyright            : (C) 2004 by Gary E.Sherman
    Email                : sherman at mrcc.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 QGSQUERYBUILDER_H
#define QGSQUERYBUILDER_H
#include <map>
#include "qgis.h"
#include <vector>
#include <QStandardItemModel>
#include <QSortFilterProxyModel>
#include <QStandardItem>
#include <QModelIndex>
#include "ui_qgsquerybuilderbase.h"
#include "qgsguiutils.h"
#include "qgshelp.h"
#include "qgis_gui.h"

class QgsVectorLayer;

class GUI_EXPORT QgsQueryBuilder : public QDialog, private Ui::QgsQueryBuilderBase
{
    Q_OBJECT
  public:

    QgsQueryBuilder( QgsVectorLayer *layer, QWidget *parent SIP_TRANSFERTHIS = nullptr,
                     Qt::WindowFlags fl = QgsGuiUtils::ModalDialogFlags );

    ~QgsQueryBuilder() override;

    void showEvent( QShowEvent *event ) override;

    QString sql();
    void setSql( const QString &sqlStatement );

  public slots:
    void accept() override;
    void reject() override;
    void clear();

    void test();

    void setDatasourceDescription( const QString &uri );

  private slots:
    void btnEqual_clicked();
    void btnLessThan_clicked();
    void btnGreaterThan_clicked();
    void btnPct_clicked();
    void btnIn_clicked();
    void btnNotIn_clicked();
    void btnLike_clicked();
    void btnILike_clicked();
    void lstFields_clicked( const QModelIndex &index );
    void lstFields_doubleClicked( const QModelIndex &index );
    void lstValues_doubleClicked( const QModelIndex &index );
    void btnLessEqual_clicked();
    void btnGreaterEqual_clicked();
    void btnNotEqual_clicked();
    void btnAnd_clicked();
    void btnNot_clicked();
    void btnOr_clicked();
    void onTextChanged( const QString &text );

    void btnGetAllValues_clicked();

    void btnSampleValues_clicked();

  private:

    void populateFields();

    void showHelp();

    void setupGuiViews();
    void setupLstFieldsModel();
    void fillValues( int idx, int limit );

    // private members
    QStandardItemModel *mModelFields = nullptr;
    QStandardItemModel *mModelValues = nullptr;
    QSortFilterProxyModel *mProxyValues = nullptr;
    int mPreviousFieldRow;

    QgsVectorLayer *mLayer = nullptr;

    QString mOrigSubsetString;
};
#endif //QGSQUERYBUILDER_H