QGIS API Documentation  2.99.0-Master (9fdd060)
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_core.h"
20 #include "qgis.h"
21 
22 class QgsMapSettings;
23 class QgsMapLayer;
24 class QgsPointXY;
25 
30 class CORE_EXPORT QgsTolerance
31 {
32 
33  public:
34 
38  enum UnitType
39  {
45  ProjectUnits
46  };
47 
54  static double vertexSearchRadius( const QgsMapSettings &mapSettings );
55 
61  static double vertexSearchRadius( QgsMapLayer *layer, const QgsMapSettings &mapSettings );
62 
68  static double defaultTolerance( QgsMapLayer *layer, const QgsMapSettings &mapSettings );
69 
79  static double toleranceInProjectUnits( double tolerance, QgsMapLayer *layer, const QgsMapSettings &mapSettings, QgsTolerance::UnitType units );
80 
89  static double toleranceInMapUnits( double tolerance, QgsMapLayer *layer, const QgsMapSettings &mapSettings, UnitType units = LayerUnits );
90 
91  private:
92  static double computeMapUnitPerPixel( QgsMapLayer *layer, const QgsMapSettings &mapSettings );
93  static QgsPointXY toLayerCoordinates( QgsMapLayer *layer, const QgsMapSettings &mapSettings, QPoint point );
94 
95 };
96 
97 #endif
Base class for all map layer types.
Definition: qgsmaplayer.h:56
A class to represent a 2D point.
Definition: qgspointxy.h:43
UnitType
Type of unit of tolerance value from settings.
Definition: qgstolerance.h:38
The QgsMapSettings class contains configuration for rendering of the map.
Pixels unit of tolerance.
Definition: qgstolerance.h:43
This is the class is providing tolerance value in map unit values.
Definition: qgstolerance.h:30
Layer unit value.
Definition: qgstolerance.h:41