QGIS API Documentation 3.34.0-Prizren (ffbdd678812)
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qgshistogramdiagram.h
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1/***************************************************************************
2 qgshistogramdiagram.h
3 ---------------------
4 begin : August 2012
5 copyright : (C) 2012 by Matthias Kuhn
6 email : matthias at opengis 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
16#ifndef QGSHISTOGRAMDIAGRAM_H
17#define QGSHISTOGRAMDIAGRAM_H
18
19#define DIAGRAM_NAME_HISTOGRAM "Histogram"
20
21#include "qgis_core.h"
22#include "qgis.h"
23#include "qgsdiagram.h"
24#include <QPen>
25#include <QBrush>
26
27class QgsFeature;
28class QPainter;
29class QPointF;
32
34
41{
42 public:
44
45 QgsHistogramDiagram *clone() const override SIP_FACTORY;
46
47 void renderDiagram( const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position ) override;
48
49 QSizeF diagramSize( const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s ) override;
50 QSizeF diagramSize( const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) override;
51 double legendSize( double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is ) const override;
52 QString diagramName() const override;
53
54 private:
55 QBrush mCategoryBrush;
56 QPen mPen;
57 double mScaleFactor;
58};
59
60
61#endif // QGSHISTOGRAMDIAGRAM_H
A vector of attributes.
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 QString diagramName() const =0
Gets a descriptive name for this diagram type.
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.
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.
virtual QgsDiagram * clone() const =0
Returns an instance that is equivalent to this one.
virtual void renderDiagram(const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position)=0
Draws the diagram at the given position (in pixel coordinates)
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition qgsfeature.h:56
A histogram style diagram.
Contains information about the context of a rendering operation.
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