QGIS API Documentation  3.21.0-Master (5b68dc587e)
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 
38 class CORE_EXPORT QgsTextDiagram: public QgsDiagram SIP_NODEFAULTCTORS
39 {
40  public:
41  enum Shape
42  {
43  Circle = 0,
45  Triangle
46  };
47 
49  {
50  Horizontal = 0,
51  Vertical
52  };
53 
55  QgsTextDiagram *clone() const override SIP_FACTORY;
56 
57  void renderDiagram( const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position ) override;
58 
59  QSizeF diagramSize( const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s ) override;
60  QSizeF diagramSize( const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) override;
61  double legendSize( double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) const override;
62 
63  QString diagramName() const override;
64 
65  private:
66  Orientation mOrientation = Vertical;
67  Shape mShape = Circle;
68  QBrush mBrush; //transparent brush
69  QPen mPen;
70 
75  void lineEllipseIntersection( QPointF lineStart, QPointF lineEnd, QPointF ellipseMid, double r1, double r2, QList<QPointF> &result ) const;
76 };
77 
78 #endif // QGSTEXTDIAGRAM_H
A vector of attributes.
Definition: qgsattributes.h:58
Additional diagram settings for interpolated size rendering.
Stores the settings for rendering a single diagram.
Base class for all diagram types.
Definition: qgsdiagram.h:40
virtual QgsDiagram * clone() const =0
Returns an instance that is equivalent to this one.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:56
Contains information about the context of a rendering operation.
A text based diagram.
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into c
#define SIP_FACTORY
Definition: qgis_sip.h:76
#define SIP_NODEFAULTCTORS
Definition: qgis_sip.h:101