QGIS API Documentation  2.17.0-Master (872e6d2)
qgspiediagram.h
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1 /***************************************************************************
2  qgspiediagram.h
3  ---------------------
4  begin : March 2011
5  copyright : (C) 2011 by Marco Hugentobler
6  email : marco dot hugentobler at sourcepole dot ch
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 #ifndef QGSPIEDIAGRAM_H
16 #define QGSPIEDIAGRAM_H
17 
18 #define DIAGRAM_NAME_PIE "Pie"
19 
20 #include "qgsdiagram.h"
21 #include "qgsfeature.h"
22 #include <QPen>
23 #include <QBrush>
24 
25 class QPainter;
26 class QPointF;
27 class QgsDiagramSettings;
29 
30 class QgsRenderContext;
31 
35 class CORE_EXPORT QgsPieDiagram: public QgsDiagram
36 {
37  public:
38  QgsPieDiagram();
39  ~QgsPieDiagram();
40 
41  virtual QgsPieDiagram* clone() const override;
42 
43  void renderDiagram( const QgsFeature& feature, QgsRenderContext& c, const QgsDiagramSettings& s, QPointF position ) override;
44 
45  QSizeF diagramSize( const QgsAttributes& attributes, const QgsRenderContext& c, const QgsDiagramSettings& s ) override;
46  QSizeF diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is ) override;
47  double legendSize( double value, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is ) const override;
48  QString diagramName() const override { return DIAGRAM_NAME_PIE; }
49 
50  private:
51  QBrush mCategoryBrush;
52  QPen mPen;
53 
54 };
55 
56 #endif // QGSPIEDIAGRAM_H
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:187
virtual double legendSize(double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is) const =0
Returns the size of the legend item for the diagram corresponding to a specified value.
#define DIAGRAM_NAME_PIE
Definition: qgspiediagram.h:18
virtual QSizeF diagramSize(const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s)=0
Returns the size in map units the diagram will use to render.
Base class for all diagram types.
Definition: qgsdiagram.h:36
virtual QgsDiagram * clone() const =0
Returns an instance that is equivalent to this one.
Additional diagram settings for interpolated size rendering.
Contains information about the context of a rendering operation.
virtual Q_DECL_DEPRECATED void renderDiagram(const QgsAttributes &att, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position)
Definition: qgsdiagram.cpp:148
A vector of attributes.
Definition: qgsfeature.h:115
QString diagramName() const override
Definition: qgspiediagram.h:48
Stores the settings for rendering a single diagram.