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;
 
    void setNotSetText( const QString &text );
 
    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 );
 
    Q_DECL_DEPRECATED void pushProjectionToFront() SIP_DEPRECATED;
 
 
    void clearRecentCrs();
 
  signals:
 
    void crsSelected();
 
    void initialized();
 
    void projectionDoubleClicked();
 
    void hasValidSelectionChanged( bool isValid );
 
  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;
 
    // Used to catch key presses on the recent projections list
    bool eventFilter( QObject *obj, QEvent *ev ) 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 expressionForItem( QTreeWidgetItem *item, const QString &expression ) const;
 
    QgsCoordinateReferenceSystem crsForItem( QTreeWidgetItem *item ) 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, ClearColumn, None };
    int mSearchColumn = QgsProjectionSelectionTreeWidget::None;
    QString mSearchValue;
 
    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();
 
    void removeRecentCrsItem( QTreeWidgetItem *item );
};
 
#endif