qgsmaptooledit.h

/***************************************************************************
    qgsmaptooledit.h  -  base class for editing map tools
    ---------------------
    begin                : Juli 2007
    copyright            : (C) 2007 by Marco Hugentobler
    email                : marco dot hugentobler at karto dot baug dot ethz 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 QGSMAPTOOLEDIT_H
#define QGSMAPTOOLEDIT_H

#include "qgis.h"
#include "qgsmaptool.h"

class QgsRubberBand;
class QgsGeometryRubberBand;
class QgsVectorLayer;
class QKeyEvent;

/** \ingroup gui
 * Base class for map tools that edit vector geometry
*/
class GUI_EXPORT QgsMapToolEdit: public QgsMapTool
{
    Q_OBJECT

  public:
    QgsMapToolEdit( QgsMapCanvas* canvas );
    virtual ~QgsMapToolEdit();

    virtual Flags flags() const override { return QgsMapTool::EditTool; }

    /**
     * Return default Z value
     * Use for set Z coordinate to new vertex for 2.5d geometries
     */
    double defaultZValue() const;

  protected:

    /** Creates a rubber band with the color/line width from
     *   the QGIS settings. The caller takes ownership of the
     *   returned object
     *   @param geometryType
     *   @param alternativeBand if true, rubber band will be set with more transparency and a dash pattern. defaut is false.
     */
    QgsRubberBand* createRubberBand( QgsWkbTypes::GeometryType geometryType = QgsWkbTypes::LineGeometry, bool alternativeBand = false );

    QgsGeometryRubberBand* createGeometryRubberBand( QgsWkbTypes::GeometryType geometryType = QgsWkbTypes::LineGeometry, bool alternativeBand = false ) const;

    //! Returns the current vector layer of the map canvas or 0
    QgsVectorLayer* currentVectorLayer();

    /** Adds vertices to other features to keep topology up to date, e.g. to neighbouring polygons.
     * @param geom list of points (in layer coordinate system)
     * @return 0 in case of success
     */
    int addTopologicalPoints( const QList<QgsPoint>& geom );

    //! Display a timed message bar noting the active layer is not vector.
    void notifyNotVectorLayer();
    //! Display a timed message bar noting the active vector layer is not editable.
    void notifyNotEditableLayer();
};

#endif