QGIS API Documentation  2.99.0-Master (9caa722)
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 "qgis_core.h"
21 #include "qgis.h"
22 #include "qgsdiagram.h"
23 #include <QPen>
24 #include <QBrush>
25 
26 class QPainter;
27 class QPointF;
28 class QgsDiagramSettings;
30 class QgsFeature;
31 class QgsRenderContext;
32 
36 class CORE_EXPORT QgsPieDiagram: public QgsDiagram
37 {
38  public:
39  QgsPieDiagram();
40 
41  virtual QgsPieDiagram *clone() const override SIP_FACTORY;
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:61
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
#define SIP_FACTORY
Definition: qgis_sip.h:69
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:37
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: qgsattributes.h:57
QString diagramName() const override
Get a descriptive name for this diagram type.
Definition: qgspiediagram.h:48
Stores the settings for rendering a single diagram.