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 "qgis_gui.h"
#include "qgscoordinatereferencesystem.h"
#include "qgscoordinatetransform.h"
#include "qgsguiutils.h"
 
#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;

        bool allowFallback = true;
    };

    static bool run(
      const QgsCoordinateReferenceSystem &sourceCrs = QgsCoordinateReferenceSystem(),
      const QgsCoordinateReferenceSystem &destinationCrs = QgsCoordinateReferenceSystem(),
      QWidget *parent = nullptr,
      QgsMapCanvas *mapCanvas = nullptr,
      const QString &windowTitle = QString()
    );
 
    // TODO QGIS 5.0 - remove selectedDatumTransform, forceChoice

    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 = Qt::WindowFlags(),
      const QString &selectedProj = QString(),
      QgsMapCanvas *mapCanvas = nullptr,
      bool allowFallback = true
    );
 
    void accept() override;
    void reject() override;

    TransformInfo selectedDatumTransform();
 
  private slots:
 
    void operationChanged();
    void setSourceCrs( const QgsCoordinateReferenceSystem &sourceCrs );
    void setDestinationCrs( const QgsCoordinateReferenceSystem &destinationCrs );
 
  private:
    enum Roles
    {
      TransformIdRole = Qt::UserRole + 1,
      ProjRole,
      AvailableRole,
      BoundsRole
    };
 
    bool gridShiftTransformation( const QString &itemText ) const;
 
    void setOKButtonEnabled();

    bool shouldAskUserForSelection() const;

    TransformInfo defaultDatumTransform() const;

    void applyDefaultTransform();
 
    std::unique_ptr<QgsTemporaryCursorRestoreOverride> mPreviousCursorOverride;
 
    friend class TestQgsDatumTransformDialog;
};
 
#endif // QGSDATUMTRANSFORMDIALOG_H