QGIS API Documentation  2.99.0-Master (009e47e)
qgstextdiagram.h
Go to the documentation of this file.
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 
36 class CORE_EXPORT QgsTextDiagram: public QgsDiagram
37 {
38  public:
39  enum Shape
40  {
41  Circle = 0,
43  Triangle
44  };
45 
47  {
48  Horizontal = 0,
49  Vertical
50  };
51 
53  virtual QgsTextDiagram *clone() const override SIP_FACTORY;
54 
55  void renderDiagram( const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position ) override;
56 
57  QSizeF diagramSize( const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s ) override;
58  QSizeF diagramSize( const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) override;
59  double legendSize( double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) const override;
60 
61  QString diagramName() const override { return DIAGRAM_NAME_TEXT; }
62 
63  private:
64  Orientation mOrientation;
65  Shape mShape;
66  QBrush mBrush; //transparent brush
67  QPen mPen;
68 
71  void lineEllipseIntersection( QPointF lineStart, QPointF lineEnd, QPointF ellipseMid, double r1, double r2, QList<QPointF> &result ) const;
72 };
73 
74 #endif // QGSTEXTDIAGRAM_H
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:61
#define SIP_FACTORY
Definition: qgis_sip.h:57
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.
#define DIAGRAM_NAME_TEXT
A vector of attributes.
Definition: qgsattributes.h:57
Stores the settings for rendering a single diagram.