Other Alias
QwtPlotIntervalCurve represents a series of samplesSYNOPSIS
#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
Paint attributes.
Public Member Functions
QwtPlotIntervalCurve (const QString &title=QString::null)
QwtPlotIntervalCurve (const QwtText &title)
virtual ~QwtPlotIntervalCurve ()
Destructor.
virtual int rtti () const
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 *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
virtual QRectF boundingRect () const
virtual QwtGraphic legendIcon (int index, const QSizeF &) const
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.
Member Enumeration Documentation
enum QwtPlotIntervalCurve::CurveStyle
Curve styles. The default setting is QwtPlotIntervalCurve::Tube.
See Also:
- setStyle(), style()
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.
enum QwtPlotIntervalCurve::PaintAttribute
Attributes to modify the drawing algorithm.See Also:
- setPaintAttribute(), testPaintAttribute()
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.
Constructor & Destructor Documentation
QwtPlotIntervalCurve::QwtPlotIntervalCurve (const QString &title = QString::null) [explicit]
ConstructorParameters:
- title Title of the curve
QwtPlotIntervalCurve::QwtPlotIntervalCurve (const QwtText &title) [explicit]
ConstructorParameters:
- title Title of the curve
Member Function Documentation
QRectF QwtPlotIntervalCurve::boundingRect () const [virtual]
Returns:
- Bounding rectangle of all samples. For an empty series the rectangle is invalid.
Reimplemented from QwtPlotSeriesItem.
const QBrush & QwtPlotIntervalCurve::brush () const
Returns:
- Brush used to fill the area in Tube style()
See Also:
- setBrush(), setStyle(), CurveStyle
void QwtPlotIntervalCurve::drawSeries (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, intfrom, intto) const [virtual]
Draw a subset of the samplesParameters:
-
painter Painter
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:
- drawTube(), drawSymbols()
Implements QwtPlotSeriesItem.
void QwtPlotIntervalCurve::drawSymbols (QPainter *painter, const QwtIntervalSymbol &symbol, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, intfrom, intto) const [protected], [virtual]
Draw symbols for a subset of the samplesParameters:
-
painter Painter
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:
- setSymbol(), drawSeries(), drawTube()
void QwtPlotIntervalCurve::drawTube (QPainter *painter, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, intfrom, intto) const [protected], [virtual]
Draw a tubeBuilds 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:
-
painter Painter
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:
- drawSeries(), drawSymbols()
QwtGraphic QwtPlotIntervalCurve::legendIcon (intindex, const QSizeF &size) const [virtual]
Returns:
- Icon for the legend
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:
-
index Index of the legend entry ( ignored as there is only one )
size Icon size
See Also:
- QwtPlotItem::setLegendIconSize(), QwtPlotItem::legendData()
Reimplemented from QwtPlotItem.
const QPen & QwtPlotIntervalCurve::pen () const
Returns:
- Pen used to draw the lines
See Also:
- setPen(), brush()
int QwtPlotIntervalCurve::rtti () const [virtual]
Returns:
- QwtPlotItem::Rtti_PlotIntervalCurve
Reimplemented from QwtPlotItem.
void QwtPlotIntervalCurve::setBrush (const QBrush &brush)
Assign a brush.The brush is used to fill the area in Tube style().
Parameters:
- brush Brush
See Also:
- brush(), pen(), setStyle(), CurveStyle
void QwtPlotIntervalCurve::setPaintAttribute (PaintAttributeattribute, boolon = true)
Specify an attribute how to draw the curveParameters:
-
attribute Paint attribute
on On/Off
See Also:
- testPaintAttribute()
void QwtPlotIntervalCurve::setPen (const QColor &color, qrealwidth = 0.0, Qt::PenStylestyle = Qt::SolidLine)
Build and assign a penIn 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:
-
color Pen color
width Pen width
style Pen style
See Also:
- pen(), brush()
void QwtPlotIntervalCurve::setPen (const QPen &pen)
Assign a pen.
Parameters:
- pen New pen
See Also:
- pen(), brush()
void QwtPlotIntervalCurve::setSamples (const QVector< QwtIntervalSample > &samples)
Initialize data with an array of samples.Parameters:
- samples Vector of samples
void QwtPlotIntervalCurve::setSamples (QwtSeriesData< QwtIntervalSample > *data)
Assign a series of samplessetSamples() is just a wrapper for setData() without any additional value - beside that it is easier to find for the developer.
Parameters:
- data Data
Warning:
- The item takes ownership of the data object, deleting it when its not used anymore.
void QwtPlotIntervalCurve::setStyle (CurveStylestyle)
Set the curve's drawing styleParameters:
- style Curve style
See Also:
- CurveStyle, style()
void QwtPlotIntervalCurve::setSymbol (const QwtIntervalSymbol *symbol)
Assign a symbol.Parameters:
- symbol Symbol
See Also:
- symbol()
QwtPlotIntervalCurve::CurveStyle QwtPlotIntervalCurve::style () const
Returns:
- Style of the curve
See Also:
- setStyle()
const QwtIntervalSymbol * QwtPlotIntervalCurve::symbol () const
Returns:
- Current symbol or NULL, when no symbol has been assigned
See Also:
- setSymbol()
bool QwtPlotIntervalCurve::testPaintAttribute (PaintAttributeattribute) const
Returns:
- True, when attribute is enabled
See Also:
- PaintAttribute, setPaintAttribute()
Author
Generated automatically by Doxygen for Qwt User's Guide from the source code.