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qgssnapper.h
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1 /***************************************************************************
2  qgssnapper.h
3  ------------
4  begin : June 7, 2007
5  copyright : (C) 2007 by Marco Hugentobler
6  email : marco dot hugentobler at karto dot baug dot ethz dot ch
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSSNAPPER_H
19 #define QGSSNAPPER_H
20 
21 #include "qgspoint.h"
22 #include "qgstolerance.h"
23 #include "qgsfeature.h"
24 
25 #include <QList>
26 #include <QMultiMap>
27 
28 class QgsMapRenderer;
29 class QgsVectorLayer;
30 class QPoint;
31 
35 struct CORE_EXPORT QgsSnappingResult
36 {
56 };
57 
58 
59 
61 class CORE_EXPORT QgsSnapper
62 {
63  public:
66  {
69  //snap to vertex and also to segment if no vertex is within the search tolerance
70  SnapToVertexAndSegment
71  };
72 
74  {
81  SnapWithResultsWithinTolerances
82  };
83 
84  struct SnapLayer
85  {
89  double mTolerance;
94  };
95 
96  QgsSnapper( QgsMapRenderer* mapRender );
97  ~QgsSnapper();
103  int snapPoint( const QPoint& startPoint, QList<QgsSnappingResult>& snappingResult, const QList<QgsPoint>& excludePoints = QList<QgsPoint>() );
104 
105  //setters
106  void setSnapLayers( const QList<QgsSnapper::SnapLayer>& snapLayers );
107  void setSnapMode( QgsSnapper::SnappingMode snapMode );
108 
109  private:
111  QgsSnapper();
112 
114  void cleanResultList( QMultiMap<double, QgsSnappingResult>& list, const QList<QgsPoint>& excludeList ) const;
115 
122  QList<QgsSnapper::SnapLayer> mSnapLayers;
123 };
124 
125 #endif