qgsdatumtransformdialog.h

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/***************************************************************************
                         qgsdatumtransformdialog.h
                         -------------------------
    begin                : November 2013
    copyright            : (C) 2013 by Marco Hugentobler
    email                : marco.hugentobler at sourcepole 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 QGSDATUMTRANSFORMDIALOG_H
#define QGSDATUMTRANSFORMDIALOG_H

#include "ui_qgsdatumtransformdialogbase.h"
#include "qgscoordinatereferencesystem.h"
#include "qgscoordinatetransform.h"
#include "qgis_gui.h"

class QgsTemporaryCursorRestoreOverride;

#define SIP_NO_FILE

class GUI_EXPORT QgsDatumTransformDialog : public QDialog, private Ui::QgsDatumTransformDialogBase
{
    Q_OBJECT
  public:

    struct TransformInfo
    {
      QgsCoordinateReferenceSystem sourceCrs;

      int sourceTransformId = -1;

      QgsCoordinateReferenceSystem destinationCrs;

      int destinationTransformId = -1;

      QString proj;
    };

    static bool run( const QgsCoordinateReferenceSystem &sourceCrs = QgsCoordinateReferenceSystem(),
                     const QgsCoordinateReferenceSystem &destinationCrs = QgsCoordinateReferenceSystem(),
                     QWidget *parent = nullptr );

    // TODO QGIS 4.0 - remove selectedDatumTransform

    QgsDatumTransformDialog( const QgsCoordinateReferenceSystem &sourceCrs = QgsCoordinateReferenceSystem(),
                             const QgsCoordinateReferenceSystem &destinationCrs = QgsCoordinateReferenceSystem(),
                             bool allowCrsChanges = false,
                             bool showMakeDefault = true,
                             bool forceChoice = true,
                             QPair<int, int> selectedDatumTransforms = qMakePair( -1, -1 ),
                             QWidget *parent = nullptr,
                             Qt::WindowFlags f = nullptr,
                             const QString &selectedProj = QString() );
    ~QgsDatumTransformDialog() override;

    void accept() override;
    void reject() override;

    TransformInfo selectedDatumTransform();

  private slots:

    void tableCurrentItemChanged( QTableWidgetItem *, QTableWidgetItem * );
    void setSourceCrs( const QgsCoordinateReferenceSystem &sourceCrs );
    void setDestinationCrs( const QgsCoordinateReferenceSystem &destinationCrs );

  private:

    enum Roles
    {
      TransformIdRole = Qt::UserRole + 1,
      ProjRole,
    };

    bool gridShiftTransformation( const QString &itemText ) const;
    bool testGridShiftFileAvailability( QTableWidgetItem *item ) const;
    void load( QPair<int, int> selectedDatumTransforms = qMakePair( -1, -1 ), const QString &selectedProj = QString() );
    void setOKButtonEnabled();

    bool shouldAskUserForSelection() const;

    TransformInfo defaultDatumTransform() const;

    void applyDefaultTransform();

#if PROJ_VERSION_MAJOR>=6
    QList< QgsDatumTransform::TransformDetails > mDatumTransforms;
#else
    QList< QgsDatumTransform::TransformPair > mDatumTransforms;
#endif
    QgsCoordinateReferenceSystem mSourceCrs;
    QgsCoordinateReferenceSystem mDestinationCrs;
    std::unique_ptr< QgsTemporaryCursorRestoreOverride > mPreviousCursorOverride;

    friend class TestQgsDatumTransformDialog;
};

#endif // QGSDATUMTRANSFORMDIALOG_H