QGIS API Documentation  2.99.0-Master (c558d51)
qgstolerance.h
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1 /***************************************************************************
2  qgstolerance.h - wrapper for tolerance handling
3  ----------------------
4  begin : March 2009
5  copyright : (C) 2009 by Richard Kostecky
6  email : csf.kostej at gmail dot com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #ifndef QGSTOLERANCE_H
17 #define QGSTOLERANCE_H
18 
19 #include "qgis.h"
20 
21 class QgsMapSettings;
22 class QgsMapLayer;
23 class QgsPoint;
24 
28 class CORE_EXPORT QgsTolerance
29 {
30 
31  public:
32 
35  enum UnitType
36  {
42  ProjectUnits
43  };
44 
51  static double vertexSearchRadius( const QgsMapSettings& mapSettings );
52 
58  static double vertexSearchRadius( QgsMapLayer* layer, const QgsMapSettings& mapSettings );
59 
65  static double defaultTolerance( QgsMapLayer* layer, const QgsMapSettings& mapSettings );
66 
76  static double toleranceInProjectUnits( double tolerance, QgsMapLayer* layer, const QgsMapSettings& mapSettings, QgsTolerance::UnitType units );
77 
86  static double toleranceInMapUnits( double tolerance, QgsMapLayer* layer, const QgsMapSettings& mapSettings, UnitType units = LayerUnits );
87 
88  private:
89  static double computeMapUnitPerPixel( QgsMapLayer* layer, const QgsMapSettings& mapSettings );
90  static QgsPoint toLayerCoordinates( QgsMapLayer* layer, const QgsMapSettings& mapSettings, QPoint point );
91 
92 };
93 
94 #endif
Base class for all map layer types.
Definition: qgsmaplayer.h:49
UnitType
Type of unit of tolerance value from settings.
Definition: qgstolerance.h:35
The QgsMapSettings class contains configuration for rendering of the map.
Pixels unit of tolerance.
Definition: qgstolerance.h:40
This is the class is providing tolerance value in map unit values.
Definition: qgstolerance.h:28
A class to represent a point.
Definition: qgspoint.h:111
Layer unit value.
Definition: qgstolerance.h:38