QGIS API Documentation  3.6.0-Noosa (5873452)
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 <QObject>
20 
21 #include "qgis_core.h"
22 #include "qgis_sip.h"
23 
24 class QgsMapSettings;
25 class QgsMapLayer;
26 class QgsPointXY;
27 
32 class CORE_EXPORT QgsTolerance
33 {
34  Q_GADGET
35  public:
36 
40  enum UnitType
41  {
47  ProjectUnits
48  };
49  Q_ENUM( UnitType )
50 
51 
57  static double vertexSearchRadius( const QgsMapSettings &mapSettings );
58 
64  static double vertexSearchRadius( QgsMapLayer *layer, const QgsMapSettings &mapSettings );
65 
71  static double defaultTolerance( QgsMapLayer *layer, const QgsMapSettings &mapSettings );
72 
82  static double toleranceInProjectUnits( double tolerance, QgsMapLayer *layer, const QgsMapSettings &mapSettings, QgsTolerance::UnitType units );
83 
92  static double toleranceInMapUnits( double tolerance, QgsMapLayer *layer, const QgsMapSettings &mapSettings, UnitType units = LayerUnits );
93 
94  private:
95  static double computeMapUnitPerPixel( QgsMapLayer *layer, const QgsMapSettings &mapSettings );
96  static QgsPointXY toLayerCoordinates( QgsMapLayer *layer, const QgsMapSettings &mapSettings, QPoint point );
97 
98 };
99 
100 #endif
Base class for all map layer types.
Definition: qgsmaplayer.h:64
A class to represent a 2D point.
Definition: qgspointxy.h:43
UnitType
Type of unit of tolerance value from settings.
Definition: qgstolerance.h:40
The QgsMapSettings class contains configuration for rendering of the map.
Pixels unit of tolerance.
Definition: qgstolerance.h:45
This is the class is providing tolerance value in map unit values.
Definition: qgstolerance.h:32
Layer unit value.
Definition: qgstolerance.h:43