QGIS API Documentation  3.4.3-Madeira (2f64a3c)
qgssurface.h
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1 /***************************************************************************
2  qgssurface.h
3  --------------
4  begin : September 2014
5  copyright : (C) 2014 by Marco Hugentobler
6  email : marco at sourcepole 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 QGSSURFACEV2_H
19 #define QGSSURFACEV2_H
20 
21 #include "qgis_core.h"
22 #include "qgis.h"
23 #include "qgsabstractgeometry.h"
24 #include "qgsrectangle.h"
25 
26 class QgsPolygon;
27 
32 class CORE_EXPORT QgsSurface: public QgsAbstractGeometry
33 {
34  public:
35 
40  virtual QgsPolygon *surfaceToPolygon() const = 0 SIP_FACTORY;
41 
45  QgsRectangle boundingBox() const override
46  {
47  if ( mBoundingBox.isNull() )
48  {
49  mBoundingBox = calculateBoundingBox();
50  }
51  return mBoundingBox;
52  }
53 
54 #ifndef SIP_RUN
55 
63  inline const QgsSurface *cast( const QgsAbstractGeometry *geom ) const
64  {
65  if ( !geom )
66  return nullptr;
67 
68  QgsWkbTypes::Type flatType = QgsWkbTypes::flatType( geom->wkbType() );
69  if ( flatType == QgsWkbTypes::CurvePolygon
70  || flatType == QgsWkbTypes::Polygon
71  || flatType == QgsWkbTypes::Triangle )
72  return static_cast<const QgsSurface *>( geom );
73  return nullptr;
74  }
75 #endif
76  protected:
77 
78  void clearCache() const override { mBoundingBox = QgsRectangle(); QgsAbstractGeometry::clearCache(); }
79 
81 };
82 
83 #endif // QGSSURFACEV2_H
A rectangle specified with double values.
Definition: qgsrectangle.h:40
void clearCache() const override
Clears any cached parameters associated with the geometry, e.g., bounding boxes.
Definition: qgssurface.h:78
const QgsSurface * cast(const QgsAbstractGeometry *geom) const
Cast the geom to a QgsSurface.
Definition: qgssurface.h:63
Type
The WKB type describes the number of dimensions a geometry has.
Definition: qgswkbtypes.h:68
virtual void clearCache() const
Clears any cached parameters associated with the geometry, e.g., bounding boxes.
QgsRectangle boundingBox() const override
Returns the minimal bounding box for the geometry.
Definition: qgssurface.h:45
#define SIP_FACTORY
Definition: qgis_sip.h:69
Abstract base class for all geometries.
QgsWkbTypes::Type wkbType() const
Returns the WKB type of the geometry.
virtual QgsRectangle calculateBoundingBox() const
Default calculator for the minimal bounding box for the geometry.
Polygon geometry type.
Definition: qgspolygon.h:31
static Type flatType(Type type)
Returns the flat type for a WKB type.
Definition: qgswkbtypes.h:429
QgsRectangle mBoundingBox
Definition: qgssurface.h:80