QwtPlotIntervalCurve - Man Page

enum CurveStyle { NoCurve, Tube, UserCurve = 100 }
Curve styles. The default setting is QwtPlotIntervalCurve::Tube.
enum PaintAttribute { ClipPolygons = 0x01, ClipSymbol = 0x02 }
typedef QFlags< PaintAttribute > PaintAttributes

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

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

An ORed combination of PaintAttribute values.

Definition at line 77 of file qwt_plot_intervalcurve.h.

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.

Definition at line 38 of file qwt_plot_intervalcurve.h.

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.

Definition at line 64 of file qwt_plot_intervalcurve.h.

Constructor

Parameters

title Title of the curve

Definition at line 90 of file qwt_plot_intervalcurve.cpp.

Constructor

Parameters

title Title of the curve

Definition at line 80 of file qwt_plot_intervalcurve.cpp.

Returns

Bounding rectangle of all samples. For an empty series the rectangle is invalid.

Reimplemented from QwtPlotSeriesItem.

Definition at line 300 of file qwt_plot_intervalcurve.cpp.

Returns

Brush used to fill the area in Tube style()

See also

setBrush(), setStyle(), CurveStyle

Definition at line 291 of file qwt_plot_intervalcurve.cpp.

Draw a subset of the samples

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

drawTube(), drawSymbols()

Implements QwtPlotSeriesItem.

Definition at line 322 of file qwt_plot_intervalcurve.cpp.

Draw symbols for a subset of the samples

Parameters

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()

Definition at line 487 of file qwt_plot_intervalcurve.cpp.

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

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()

Definition at line 371 of file qwt_plot_intervalcurve.cpp.

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.

Definition at line 554 of file qwt_plot_intervalcurve.cpp.

Returns

Pen used to draw the lines

See also

setPen(), brush()

Definition at line 263 of file qwt_plot_intervalcurve.cpp.

Returns

QwtPlotItem::Rtti_PlotIntervalCurve

Reimplemented from QwtPlotItem.

Definition at line 115 of file qwt_plot_intervalcurve.cpp.

Assign a brush.

The brush is used to fill the area in Tube style().

Parameters

brush Brush

See also

brush(), pen(), setStyle(), CurveStyle

Definition at line 276 of file qwt_plot_intervalcurve.cpp.

Specify an attribute how to draw the curve

Parameters

attribute Paint attribute
on On/Off

See also

testPaintAttribute()

Definition at line 127 of file qwt_plot_intervalcurve.cpp.

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

color Pen color
width Pen width
style Pen style

See also

pen(), brush()

Definition at line 238 of file qwt_plot_intervalcurve.cpp.

Assign a pen.

Parameters

pen New pen

See also

pen(), brush()

Definition at line 248 of file qwt_plot_intervalcurve.cpp.

Initialize data with an array of samples.

Parameters

samples Vector of samples

Definition at line 150 of file qwt_plot_intervalcurve.cpp.

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

data Data

Warning

The item takes ownership of the data object, deleting it when its not used anymore.

Definition at line 166 of file qwt_plot_intervalcurve.cpp.

Set the curve's drawing style

Parameters

style Curve style

See also

CurveStyle, style()

Definition at line 178 of file qwt_plot_intervalcurve.cpp.

Assign a symbol.

Parameters

symbol Symbol

See also

symbol()

Definition at line 204 of file qwt_plot_intervalcurve.cpp.

Returns

Style of the curve

See also

setStyle()

Definition at line 193 of file qwt_plot_intervalcurve.cpp.

Returns

Current symbol or NULL, when no symbol has been assigned

See also

setSymbol()

Definition at line 220 of file qwt_plot_intervalcurve.cpp.

Returns

True, when attribute is enabled

See also

PaintAttribute, setPaintAttribute()

Definition at line 140 of file qwt_plot_intervalcurve.cpp.