QGIS API Documentation  2.99.0-Master (f1c3692)
qgstextdiagram.h
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1 /***************************************************************************
2  qgstextdiagram.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 QGSTEXTDIAGRAM_H
16 #define QGSTEXTDIAGRAM_H
17 
18 #define DIAGRAM_NAME_TEXT "Text"
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 
37 class CORE_EXPORT QgsTextDiagram: public QgsDiagram
38 {
39  public:
40  enum Shape
41  {
42  Circle = 0,
44  Triangle
45  };
46 
48  {
49  Horizontal = 0,
50  Vertical
51  };
52 
54  virtual QgsTextDiagram *clone() const override SIP_FACTORY;
55 
56  void renderDiagram( const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position ) override;
57 
58  QSizeF diagramSize( const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s ) override;
59  QSizeF diagramSize( const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) override;
60  double legendSize( double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) const override;
61 
62  QString diagramName() const override;
63 
64  private:
65  Orientation mOrientation = Vertical;
66  Shape mShape = Circle;
67  QBrush mBrush; //transparent brush
68  QPen mPen;
69 
73  void lineEllipseIntersection( QPointF lineStart, QPointF lineEnd, QPointF ellipseMid, double r1, double r2, QList<QPointF> &result ) const;
74 };
75 
76 #endif // QGSTEXTDIAGRAM_H
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:62
#define SIP_FACTORY
Definition: qgis_sip.h:69
Base class for all diagram types.
Definition: qgsdiagram.h:38
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:58
Stores the settings for rendering a single diagram.