qgsprojectionselectionwidget.h

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/***************************************************************************
    qgsprojectionselectionwidget.h
     --------------------------------------
    Date                 : 05.01.2015
    Copyright            : (C) 2015 Denis Rouzaud
    Email                : [email protected]
 ***************************************************************************
 *                                                                         *
 *   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 QGSPROJECTIONSELECTIONWIDGET_H
#define QGSPROJECTIONSELECTIONWIDGET_H

#include <QWidget>
#include "qgis_sip.h"
#include <QLineEdit>
#include <QToolButton>
#include <QComboBox>

#include "qgscoordinatereferencesystem.h"
#include "qgis_gui.h"

class QgsProjectionSelectionDialog;

class GUI_EXPORT QgsProjectionSelectionWidget : public QWidget
{
    Q_OBJECT
  public:

    enum CrsOption
    {
      LayerCrs, 
      ProjectCrs, 
      CurrentCrs, 
      DefaultCrs, 
      RecentCrs, 
      CrsNotSet, 
    };

    explicit QgsProjectionSelectionWidget( QWidget *parent SIP_TRANSFERTHIS = nullptr );

    QgsCoordinateReferenceSystem crs() const;

    void setOptionVisible( CrsOption option, bool visible );

    bool optionVisible( CrsOption option ) const;

    void setNotSetText( const QString &text );

    void setMessage( const QString &text );

  signals:

    void crsChanged( const QgsCoordinateReferenceSystem & );

    void cleared();

  public slots:

    void setCrs( const QgsCoordinateReferenceSystem &crs );

    void setLayerCrs( const QgsCoordinateReferenceSystem &crs );

    void selectCrs();

  private:

    QgsCoordinateReferenceSystem mCrs;
    QgsCoordinateReferenceSystem mLayerCrs;
    QgsCoordinateReferenceSystem mProjectCrs;
    QgsCoordinateReferenceSystem mDefaultCrs;
    QComboBox *mCrsComboBox = nullptr;
    QToolButton *mButton = nullptr;
    QgsProjectionSelectionDialog *mDialog = nullptr;
    QString mNotSetText;
    QString mMessage;

    void addNotSetOption();
    void addProjectCrsOption();
    void addDefaultCrsOption();
    void addCurrentCrsOption();
    QString currentCrsOptionText( const QgsCoordinateReferenceSystem &crs ) const;
    void addRecentCrs();
    bool crsIsShown( long srsid ) const;

    int firstRecentCrsIndex() const;

  private slots:

    void comboIndexChanged( int idx );

};

#endif // QGSPROJECTIONSELECTIONWIDGET_H