QGIS API Documentation  2.11.0-Master
qgstolerance.h
Go to the documentation of this file.
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 #include "qgsmaptopixel.h"
19 #include "qgsmaprenderer.h"
20 #include "qgsmaplayer.h"
21 #include "qgspoint.h"
22 
26 class CORE_EXPORT QgsTolerance
27 {
28 
29  public:
33  enum UnitType
34  {
38  LayerUnits = MapUnits,
42  ProjectUnits
43  };
44 
51  static double vertexSearchRadius( const QgsMapSettings& mapSettings );
52 
58  static double vertexSearchRadius( QgsMapLayer* layer, const QgsMapSettings& mapSettings );
59 
65  Q_DECL_DEPRECATED static double vertexSearchRadius( QgsMapLayer* layer, QgsMapRenderer* renderer );
67 
73  static double defaultTolerance( QgsMapLayer* layer, const QgsMapSettings& mapSettings );
74 
80  Q_DECL_DEPRECATED static double defaultTolerance( QgsMapLayer* layer, QgsMapRenderer* renderer );
82 
92  static double toleranceInProjectUnits( double tolerance, QgsMapLayer* layer, const QgsMapSettings& mapSettings, QgsTolerance::UnitType units );
93 
102  static double toleranceInMapUnits( double tolerance, QgsMapLayer* layer, const QgsMapSettings& mapSettings, UnitType units = LayerUnits );
103 
112  Q_DECL_DEPRECATED static double toleranceInMapUnits( double tolerance, QgsMapLayer* layer, QgsMapRenderer* renderer, UnitType units = LayerUnits );
114 
115  private:
116  static double computeMapUnitPerPixel( QgsMapLayer* layer, const QgsMapSettings& mapSettings );
117  static QgsPoint toLayerCoordinates( QgsMapLayer* layer, const QgsMapSettings& mapSettings, const QPoint& point );
118 
119 };
120 
121 #endif
Base class for all map layer types.
Definition: qgsmaplayer.h:49
Pixels unit of tolerance.
Definition: qgstolerance.h:40
A non GUI class for rendering a map layer set onto a QPainter.
The QgsMapSettings class contains configuration for rendering of the map.
This is the class is providing tolerance value in map unit values.
Definition: qgstolerance.h:26
A class to represent a point.
Definition: qgspoint.h:63
Layer unit value.
Definition: qgstolerance.h:36
UnitType
Type of unit of tolerance value from settings.
Definition: qgstolerance.h:33