Base class for all diagram types.
More...
#include <qgsdiagram.h>
|
virtual | ~QgsDiagram () |
|
void | clearCache () |
|
virtual QgsDiagram * | clone () const =0 |
| Returns an instance that is equivalent to this one. More...
|
|
virtual QString | diagramName () const =0 |
| Get a descriptive name for this diagram type. More...
|
|
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. More...
|
|
virtual QSizeF | diagramSize (const QgsFeature &feature, const QgsRenderContext &c, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is)=0 |
| Returns the size in map units the diagram will use to render. Interpolate size. More...
|
|
QgsExpression * | getExpression (const QString &expression, const QgsExpressionContext &context) |
| Returns a prepared expression for the specified context. More...
|
|
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. More...
|
|
virtual void | renderDiagram (const QgsFeature &feature, QgsRenderContext &c, const QgsDiagramSettings &s, QPointF position)=0 |
| Draws the diagram at the given position (in pixel coordinates) More...
|
|
|
| QgsDiagram ()=default |
| Constructor for QgsDiagram. More...
|
|
| QgsDiagram (const QgsDiagram &other) |
|
QFont | scaledFont (const QgsDiagramSettings &s, const QgsRenderContext &c) |
| Calculates a size to match the current settings and rendering context. More...
|
|
void | setPenWidth (QPen &pen, const QgsDiagramSettings &s, const QgsRenderContext &c) |
| Changes the pen width to match the current settings and rendering context. More...
|
|
QSizeF | sizeForValue (double value, const QgsDiagramSettings &s, const QgsDiagramInterpolationSettings &is) const |
| Returns the scaled size of a diagram for a value, respecting the specified diagram interpolation settings. More...
|
|
QSizeF | sizePainterUnits (QSizeF size, const QgsDiagramSettings &s, const QgsRenderContext &c) |
| Calculates a size to match the current settings and rendering context. More...
|
|
double | sizePainterUnits (double l, const QgsDiagramSettings &s, const QgsRenderContext &c) |
| Calculates a length to match the current settings and rendering context. More...
|
|
Base class for all diagram types.
Definition at line 38 of file qgsdiagram.h.
◆ ~QgsDiagram()
virtual QgsDiagram::~QgsDiagram |
( |
| ) |
|
|
inlinevirtual |
◆ QgsDiagram() [1/2]
QgsDiagram::QgsDiagram |
( |
| ) |
|
|
protecteddefault |
◆ QgsDiagram() [2/2]
QgsDiagram::QgsDiagram |
( |
const QgsDiagram & |
other | ) |
|
|
protected |
◆ clearCache()
void QgsDiagram::clearCache |
( |
| ) |
|
◆ clone()
◆ diagramName()
virtual QString QgsDiagram::diagramName |
( |
| ) |
const |
|
pure virtual |
◆ diagramSize() [1/2]
◆ diagramSize() [2/2]
◆ getExpression()
QgsExpression * QgsDiagram::getExpression |
( |
const QString & |
expression, |
|
|
const QgsExpressionContext & |
context |
|
) |
| |
Returns a prepared expression for the specified context.
- Parameters
-
expression | expression string |
context | expression context |
- Since
- QGIS 2.12
Definition at line 41 of file qgsdiagram.cpp.
◆ legendSize()
Returns the size of the legend item for the diagram corresponding to a specified value.
- Parameters
-
value | value to return legend item size for |
s | diagram settings |
is | interpolation settings |
- Since
- QGIS 2.16
Implemented in QgsTextDiagram, QgsHistogramDiagram, and QgsPieDiagram.
◆ renderDiagram()
◆ scaledFont()
Calculates a size to match the current settings and rendering context.
- Parameters
-
s | The settings that contain the font size and size type |
c | The rendering specifying the proper scale units for pixel conversion |
- Returns
- The properly scaled font for rendering
Definition at line 68 of file qgsdiagram.cpp.
◆ setPenWidth()
Changes the pen width to match the current settings and rendering context.
- Parameters
-
pen | The pen to modify |
s | The settings that specify the pen width |
c | The rendering specifying the proper scale units for pixel conversion |
Definition at line 52 of file qgsdiagram.cpp.
◆ sizeForValue()
Returns the scaled size of a diagram for a value, respecting the specified diagram interpolation settings.
- Parameters
-
value | value to calculate corresponding circular size for |
s | diagram settings |
is | interpolation settings |
- Since
- QGIS 2.16
Definition at line 84 of file qgsdiagram.cpp.
◆ sizePainterUnits() [1/2]
Calculates a size to match the current settings and rendering context.
- Parameters
-
size | The size to convert |
s | The settings that specify the size type |
c | The rendering specifying the proper scale units for pixel conversion |
- Returns
- The converted size for rendering
Definition at line 58 of file qgsdiagram.cpp.
◆ sizePainterUnits() [2/2]
Calculates a length to match the current settings and rendering context.
- Parameters
-
l | The length to convert |
s | Unused |
c | The rendering specifying the proper scale units for pixel conversion |
- Returns
- The converted length for rendering
Definition at line 63 of file qgsdiagram.cpp.
The documentation for this class was generated from the following files: