qgsprojectionselectiontreewidget.h

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/***************************************************************************
 *   qgsprojectionselector.h                                               *
 *   Copyright (C) 2005 by Tim Sutton                                      *
 *   [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 QGSCRSSELECTOR_H
#define QGSCRSSELECTOR_H

#include "ui_qgsprojectionselectorbase.h"

#include <QSet>
#include <QStringList>

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

class QResizeEvent;

class GUI_EXPORT QgsProjectionSelectionTreeWidget : public QWidget, private Ui::QgsProjectionSelectorBase
{
    Q_OBJECT

  public:

    QgsProjectionSelectionTreeWidget( QWidget *parent SIP_TRANSFERTHIS = nullptr );

    ~QgsProjectionSelectionTreeWidget() override;

    QgsCoordinateReferenceSystem crs() const;

    void setShowNoProjection( bool show );

    void setShowBoundsMap( bool show );

    bool showNoProjection() const;

    bool showBoundsMap() const;

    bool hasValidSelection() const;

  public slots:

    void setCrs( const QgsCoordinateReferenceSystem &crs );

    void setPreviewRect( const QgsRectangle &rect );

    QgsRectangle previewRect() const;

    void setOgcWmsCrsFilter( const QSet<QString> &crsFilter );

    void pushProjectionToFront();

  signals:

    void crsSelected();

    void initialized();

    void projectionDoubleClicked();

  protected:
    // Used to ensure the projection list view is actually populated
    void showEvent( QShowEvent *event ) override;

    // Used to manage column sizes
    void resizeEvent( QResizeEvent *event ) override;

  private:

    void loadUserCrsList( QSet<QString> *crsFilter = nullptr );

    void loadCrsList( QSet<QString> *crsFilter = nullptr );


    void loadUnknownCrs( const QgsCoordinateReferenceSystem &crs );

    QString sqlSafeString( const QString &string ) const;

    QString ogcWmsCrsFilterAsSqlExpression( QSet<QString> *crsFilter );

    void applySelection( int column = QgsProjectionSelectionTreeWidget::None, QString value = QString() );

    QString getSelectedExpression( const QString &e ) const;

    QString selectedName();

    long selectedCrsId();

    void showDBMissingWarning( const QString &fileName );

    enum Roles
    {
      RoleDeprecated = Qt::UserRole,
      RoleWkt,
      RoleProj
    };

    // List view nodes for the tree view of projections
    QTreeWidgetItem *mUserProjList = nullptr;
    QTreeWidgetItem *mGeoList = nullptr;
    QTreeWidgetItem *mProjList = nullptr;

    QTreeWidgetItem *mUnknownList = nullptr;

    QString mCustomCsFile;
    QString mSrsDatabaseFileName;

    long getLargestCrsIdMatch( const QString &sql );

    void insertRecent( const QgsCoordinateReferenceSystem &crs );

    bool mProjListDone = false;

    bool mUserProjListDone = false;

    bool mRecentProjListDone = false;

    enum Columns { NameColumn, AuthidColumn, QgisCrsIdColumn, None };
    int mSearchColumn = QgsProjectionSelectionTreeWidget::None;
    QString mSearchValue;

    bool mPushProjectionToFront = false;

    QSet<QString> mCrsFilter;

    QList< QgsCoordinateReferenceSystem > mRecentProjections;

    void hideDeprecated( QTreeWidgetItem *item );

    bool mShowMap = true;

    bool mInitialized = false;
    QgsCoordinateReferenceSystem mDeferredLoadCrs;
    bool mBlockSignals = false;

  private slots:
    void updateBoundsPreview();
    QStringList authorities();

    void lstCoordinateSystems_itemDoubleClicked( QTreeWidgetItem *current, int column );
    void lstRecent_itemDoubleClicked( QTreeWidgetItem *current, int column );
    void lstCoordinateSystems_currentItemChanged( QTreeWidgetItem *current, QTreeWidgetItem *prev );
    void lstRecent_currentItemChanged( QTreeWidgetItem *current, QTreeWidgetItem *prev );
    void updateFilter();
};

#endif