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qgsmaptooldeletering.h
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qgsmaptooldeletering.h
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/***************************************************************************
qgsmaptooldeletering.h - delete a ring from polygon
---------------------
begin : April 2009
copyright : (C) 2009 by Richard Kostecky
email : csf dot kostej at mail dot com
***************************************************************************
* *
* 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 QGSMAPTOOLDELETERING_H
#define QGSMAPTOOLDELETERING_H
#include "qgsmaptoolvertexedit.h"
class QgsVertexMarker;
/**Map tool to delete vertices from line/polygon features*/
class QgsMapToolDeleteRing : public QgsMapToolVertexEdit
{
public:
QgsMapToolDeleteRing( QgsMapCanvas* canvas );
virtual ~QgsMapToolDeleteRing();
void canvasMoveEvent( QMouseEvent * e );
void canvasPressEvent( QMouseEvent * e );
void canvasReleaseEvent( QMouseEvent * e );
//! called when map tool is being deactivated
void deactivate();
private:
QgsVertexMarker* mCross;
//! delete inner ring from the geometry
void deleteRing( int fId, int beforeVertexNr, QgsVectorLayer* vlayer);
//! return ring number in polygon
int ringNumInPolygon( QgsGeometry* g, int vertexNr );
//! return ring number in multipolygon and set parNum to index of the part
int ringNumInMultiPolygon( QgsGeometry* g, int vertexNr, int& partNum );
};
#endif