QGIS API Documentation 3.39.0-Master (bca3cdb6021)
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A histogram style diagram. More...
#include <qgshistogramdiagram.h>
Public Member Functions | |
QgsHistogramDiagram () | |
QgsHistogramDiagram * | clone () const override |
Returns an instance that is equivalent to this one. | |
QString | diagramName () const override |
Gets a descriptive name for this diagram type. | |
QSizeF | diagramSize (const QgsAttributes &attributes, const QgsRenderContext &c, const QgsDiagramSettings &s) override |
Returns the size in map units the diagram will use to render. | |
QSizeF | diagramSize (const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &interpolationSettings) override |
Returns the size in map units the diagram will use to render. Interpolate size. | |
double | legendSize (double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &interpolationSettings) const override |
Returns the size of the legend item for the diagram corresponding to a specified value. | |
void | renderDiagram (const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position) override |
Draws the diagram at the given position (in pixel coordinates) | |
Public Member Functions inherited from QgsDiagram | |
virtual | ~QgsDiagram () |
void | clearCache () |
QgsExpression * | getExpression (const QString &expression, const QgsExpressionContext &context) |
Returns a prepared expression for the specified context. | |
Static Public Attributes | |
static const QString | DIAGRAM_NAME_HISTOGRAM = QStringLiteral( "Histogram" ) |
Additional Inherited Members | |
Protected Member Functions inherited from QgsDiagram | |
QgsDiagram ()=default | |
QgsDiagram (const QgsDiagram &other) | |
QFont | scaledFont (const QgsDiagramSettings &s, const QgsRenderContext &c) |
Calculates a size to match the current settings and rendering context. | |
void | setPenWidth (QPen &pen, const QgsDiagramSettings &s, const QgsRenderContext &c) |
Changes the pen width to match the current settings and rendering context. | |
QSizeF | sizeForValue (double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &interpolationSettings) const |
Returns the scaled size of a diagram for a value, respecting the specified diagram interpolation settings. | |
double | sizePainterUnits (double l, const QgsDiagramSettings &s, const QgsRenderContext &c) |
Calculates a length to match the current settings and rendering context. | |
QSizeF | sizePainterUnits (QSizeF size, const QgsDiagramSettings &s, const QgsRenderContext &c) |
Calculates a size to match the current settings and rendering context. | |
A histogram style diagram.
Definition at line 38 of file qgshistogramdiagram.h.
QgsHistogramDiagram::QgsHistogramDiagram | ( | ) |
Definition at line 26 of file qgshistogramdiagram.cpp.
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overridevirtual |
Returns an instance that is equivalent to this one.
Implements QgsDiagram.
Definition at line 33 of file qgshistogramdiagram.cpp.
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overridevirtual |
Gets a descriptive name for this diagram type.
Implements QgsDiagram.
Definition at line 115 of file qgshistogramdiagram.cpp.
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overridevirtual |
Returns the size in map units the diagram will use to render.
Implements QgsDiagram.
Definition at line 120 of file qgshistogramdiagram.cpp.
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overridevirtual |
Returns the size in map units the diagram will use to render. Interpolate size.
Implements QgsDiagram.
Definition at line 38 of file qgshistogramdiagram.cpp.
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overridevirtual |
Returns the size of the legend item for the diagram corresponding to a specified value.
value | value to return legend item size for |
s | diagram settings |
interpolationSettings | interpolation settings |
Implements QgsDiagram.
Definition at line 100 of file qgshistogramdiagram.cpp.
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overridevirtual |
Draws the diagram at the given position (in pixel coordinates)
Implements QgsDiagram.
Definition at line 168 of file qgshistogramdiagram.cpp.
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static |
Definition at line 41 of file qgshistogramdiagram.h.