QGIS API Documentation  2.99.0-Master (c558d51)
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 <QPen>
22 #include <QBrush>
23 
24 class QPainter;
25 class QPointF;
26 class QgsDiagramSettings;
28 class QgsFeature;
29 class QgsRenderContext;
30 
34 class CORE_EXPORT QgsPieDiagram: public QgsDiagram
35 {
36  public:
37  QgsPieDiagram();
38  ~QgsPieDiagram();
39 
40  virtual QgsPieDiagram* clone() const override;
41 
42  void renderDiagram( const QgsFeature& feature, QgsRenderContext& c, const QgsDiagramSettings& s, QPointF position ) override;
43 
44  QSizeF diagramSize( const QgsAttributes& attributes, const QgsRenderContext& c, const QgsDiagramSettings& s ) override;
45  QSizeF diagramSize( const QgsFeature& feature, const QgsRenderContext& c, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is ) override;
46  double legendSize( double value, const QgsDiagramSettings& s, const QgsDiagramInterpolationSettings& is ) const override;
47  QString diagramName() const override { return DIAGRAM_NAME_PIE; }
48 
49  private:
50  QBrush mCategoryBrush;
51  QPen mPen;
52 
53 };
54 
55 #endif // QGSPIEDIAGRAM_H
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:135
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 void renderDiagram(const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position)=0
Draws the diagram at the given position (in pixel coordinates)
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:35
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.
A vector of attributes.
Definition: qgsfeature.h:55
QString diagramName() const override
Get a descriptive name for this diagram type.
Definition: qgspiediagram.h:47
Stores the settings for rendering a single diagram.