QwtPlotIntervalCurve(3) | Qwt User's Guide | QwtPlotIntervalCurve(3) |
NAME
QwtPlotIntervalCurve - QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval ( $[y1,y2] = f(x)$ ).
SYNOPSIS
#include <qwt_plot_intervalcurve.h>
Inherits QwtPlotSeriesItem, and QwtSeriesStore< QwtIntervalSample >.
Public Types
enum CurveStyle { NoCurve, Tube,
UserCurve = 100 }
Curve styles. The default setting is QwtPlotIntervalCurve::Tube. enum
PaintAttribute { ClipPolygons = 0x01, ClipSymbol = 0x02
}
typedef QFlags< PaintAttribute > PaintAttributes
Public Member Functions
QwtPlotIntervalCurve (const QString
&title=QString())
QwtPlotIntervalCurve (const QwtText &title)
virtual ~QwtPlotIntervalCurve ()
Destructor. virtual int rtti () const override
void setPaintAttribute (PaintAttribute, bool on=true)
bool testPaintAttribute (PaintAttribute) const
void setSamples (const QVector< QwtIntervalSample >
&)
void setSamples (QwtSeriesData< QwtIntervalSample >
*)
void setPen (const QColor &, qreal width=0.0,
Qt::PenStyle=Qt::SolidLine)
void setPen (const QPen &)
Assign a pen. const QPen & pen () const
void setBrush (const QBrush &)
const QBrush & brush () const
void setStyle (CurveStyle style)
CurveStyle style () const
void setSymbol (const QwtIntervalSymbol *)
const QwtIntervalSymbol * symbol () const
virtual void drawSeries (QPainter *, const QwtScaleMap
&xMap, const QwtScaleMap &yMap, const QRectF &canvasRect,
int from, int to) const override
virtual QRectF boundingRect () const override
virtual QwtGraphic legendIcon (int index, const QSizeF &)
const override
Protected Member Functions
void init ()
Initialize internal members. virtual void drawTube (QPainter *, const
QwtScaleMap &xMap, const QwtScaleMap &yMap, const
QRectF &canvasRect, int from, int to) const
virtual void drawSymbols (QPainter *, const QwtIntervalSymbol
&, const QwtScaleMap &xMap, const QwtScaleMap
&yMap, const QRectF &canvasRect, int from, int to) const
Detailed Description
QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval ( $[y1,y2] = f(x)$ ).
The representation depends on the style() and an optional symbol() that is displayed for each interval. QwtPlotIntervalCurve might be used to display error bars or the area between 2 curves.
Definition at line 27 of file qwt_plot_intervalcurve.h.
Member Typedef Documentation
typedef QFlags<PaintAttribute > QwtPlotIntervalCurve::PaintAttributes
An ORed combination of PaintAttribute values.
Definition at line 77 of file qwt_plot_intervalcurve.h.
Member Enumeration Documentation
enum QwtPlotIntervalCurve::CurveStyle
Curve styles. The default setting is QwtPlotIntervalCurve::Tube.
See also
Enumerator
- NoCurve
- Don't draw a curve. Note: This doesn't affect the symbols.
- Tube
- Build 2 curves from the upper and lower limits of the intervals and draw them with the pen(). The area between the curves is filled with the brush().
- UserCurve
- Styles >= QwtPlotIntervalCurve::UserCurve are reserved for derived classes that overload drawSeries() with additional application specific curve types.
Definition at line 38 of file qwt_plot_intervalcurve.h.
enum QwtPlotIntervalCurve::PaintAttribute
Attributes to modify the drawing algorithm.
See also
Enumerator
- ClipPolygons
- Clip polygons before painting them. In situations, where points are far outside the visible area (f.e when zooming deep) this might be a substantial improvement for the painting performance.
- ClipSymbol
- Check if a symbol is on the plot canvas before painting it.
Definition at line 64 of file qwt_plot_intervalcurve.h.
Constructor & Destructor Documentation
QwtPlotIntervalCurve::QwtPlotIntervalCurve (const QString & title = QString()) [explicit]
Constructor
Parameters
Definition at line 90 of file qwt_plot_intervalcurve.cpp.
QwtPlotIntervalCurve::QwtPlotIntervalCurve (const QwtText & title) [explicit]
Constructor
Parameters
Definition at line 80 of file qwt_plot_intervalcurve.cpp.
Member Function Documentation
QRectF QwtPlotIntervalCurve::boundingRect () const [override], [virtual]
Returns
Reimplemented from QwtPlotSeriesItem.
Definition at line 300 of file qwt_plot_intervalcurve.cpp.
const QBrush & QwtPlotIntervalCurve::brush () const
Returns
See also
Definition at line 291 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::drawSeries (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, int from, int to) const [override], [virtual]
Draw a subset of the samples
Parameters
xMap Maps x-values into pixel coordinates.
yMap Maps y-values into pixel coordinates.
canvasRect Contents rectangle of the canvas
from Index of the first sample to be painted
to Index of the last sample to be painted. If to < 0 the series will be painted to its last sample.
See also
Implements QwtPlotSeriesItem.
Definition at line 322 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::drawSymbols (QPainter * painter, const QwtIntervalSymbol & symbol, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, int from, int to) const [protected], [virtual]
Draw symbols for a subset of the samples
Parameters
symbol Interval symbol
xMap x map
yMap y map
canvasRect Contents rectangle of the canvas
from Index of the first sample to be painted
to Index of the last sample to be painted
See also
Definition at line 487 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::drawTube (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, int from, int to) const [protected], [virtual]
Draw a tube
Builds 2 curves from the upper and lower limits of the intervals and draws them with the pen(). The area between the curves is filled with the brush().
Parameters
xMap Maps x-values into pixel coordinates.
yMap Maps y-values into pixel coordinates.
canvasRect Contents rectangle of the canvas
from Index of the first sample to be painted
to Index of the last sample to be painted. If to < 0 the series will be painted to its last sample.
See also
Definition at line 371 of file qwt_plot_intervalcurve.cpp.
QwtGraphic QwtPlotIntervalCurve::legendIcon (int index, const QSizeF & size) const [override], [virtual]
Returns
In case of Tube style() the icon is a plain rectangle filled with the brush(). If a symbol is assigned it is scaled to size.
Parameters
size Icon size
See also
Reimplemented from QwtPlotItem.
Definition at line 554 of file qwt_plot_intervalcurve.cpp.
const QPen & QwtPlotIntervalCurve::pen () const
Returns
See also
Definition at line 263 of file qwt_plot_intervalcurve.cpp.
int QwtPlotIntervalCurve::rtti () const [override], [virtual]
Returns
Reimplemented from QwtPlotItem.
Definition at line 115 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::setBrush (const QBrush & brush)
Assign a brush.
The brush is used to fill the area in Tube style().
Parameters
See also
Definition at line 276 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::setPaintAttribute (PaintAttribute attribute, bool on = true)
Specify an attribute how to draw the curve
Parameters
on On/Off
See also
Definition at line 127 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::setPen (const QColor & color, qreal width = 0.0, Qt::PenStyle style = Qt::SolidLine)
Build and assign a pen
In Qt5 the default pen width is 1.0 ( 0.0 in Qt4 ) what makes it non cosmetic ( see QPen::isCosmetic() ). This method has been introduced to hide this incompatibility.
Parameters
width Pen width
style Pen style
See also
Definition at line 238 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::setPen (const QPen & pen)
Assign a pen.
Parameters
See also
Definition at line 248 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::setSamples (const QVector< QwtIntervalSample > & samples)
Initialize data with an array of samples.
Parameters
Definition at line 150 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::setSamples (QwtSeriesData< QwtIntervalSample > * data)
Assign a series of samples
setSamples() is just a wrapper for setData() without any additional value - beside that it is easier to find for the developer.
Parameters
Warning
Definition at line 166 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::setStyle (CurveStyle style)
Set the curve's drawing style
Parameters
See also
Definition at line 178 of file qwt_plot_intervalcurve.cpp.
void QwtPlotIntervalCurve::setSymbol (const QwtIntervalSymbol * symbol)
Assign a symbol.
Parameters
See also
Definition at line 204 of file qwt_plot_intervalcurve.cpp.
QwtPlotIntervalCurve::CurveStyle QwtPlotIntervalCurve::style () const
Returns
See also
Definition at line 193 of file qwt_plot_intervalcurve.cpp.
const QwtIntervalSymbol * QwtPlotIntervalCurve::symbol () const
Returns
See also
Definition at line 220 of file qwt_plot_intervalcurve.cpp.
bool QwtPlotIntervalCurve::testPaintAttribute (PaintAttribute attribute) const
Returns
See also
Definition at line 140 of file qwt_plot_intervalcurve.cpp.
Author
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Sun Jul 18 2021 | Version 6.2.0 |