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QwtPlotSpectroCurve(3) Qwt User's Guide QwtPlotSpectroCurve(3)

NAME

QwtPlotSpectroCurve - Curve that displays 3D points as dots, where the z coordinate is mapped to a color.

SYNOPSIS

#include <qwt_plot_spectrocurve.h>

Inherits QwtPlotSeriesItem, and QwtSeriesStore< QwtPoint3D >.

Public Types


enum PaintAttribute { ClipPoints = 1 }
Paint attributes. typedef QFlags< PaintAttribute > PaintAttributes
Paint attributes.

Public Member Functions


QwtPlotSpectroCurve (const QString &title=QString())
QwtPlotSpectroCurve (const QwtText &title)
virtual ~QwtPlotSpectroCurve ()
Destructor. virtual int rtti () const
void setPaintAttribute (PaintAttribute, bool on=true)
bool testPaintAttribute (PaintAttribute) const
void setSamples (const QVector< QwtPoint3D > &)
void setSamples (QwtSeriesData< QwtPoint3D > *)
void setColorMap (QwtColorMap *)
const QwtColorMap * colorMap () const
void setColorRange (const QwtInterval &)
QwtInterval & colorRange () const
virtual void drawSeries (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const
void setPenWidth (double)
double penWidth () const

Protected Member Functions


virtual void drawDots (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, int from, int to) const

Detailed Description

Curve that displays 3D points as dots, where the z coordinate is mapped to a color.

Member Enumeration Documentation

enum QwtPlotSpectroCurve::PaintAttribute

Paint attributes.

Enumerator

Clip points outside the canvas rectangle.

Constructor & Destructor Documentation

QwtPlotSpectroCurve::QwtPlotSpectroCurve (const QString & title = QString()) [explicit]

Constructor

Parameters:

title Title of the curve

QwtPlotSpectroCurve::QwtPlotSpectroCurve (const QwtText & title) [explicit]

Constructor

Parameters:

title Title of the curve

Member Function Documentation

const QwtColorMap * QwtPlotSpectroCurve::colorMap () const

Returns:

Color Map used for mapping the intensity values to colors

See also:

setColorMap(), setColorRange(), QwtColorMap::color()

QwtInterval & QwtPlotSpectroCurve::colorRange () const

Returns:

Value interval, that corresponds to the color map

See also:

setColorRange(), setColorMap(), QwtColorMap::color()

void QwtPlotSpectroCurve::drawDots (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, int from, int to) const [protected], [virtual]

Draw a subset of the points

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()

void QwtPlotSpectroCurve::drawSeries (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect, int from, int to) const [virtual]

Draw a subset of the points

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:

drawDots()

Implements QwtPlotSeriesItem.

double QwtPlotSpectroCurve::penWidth () const

Returns:

Pen width used to draw a dot

See also:

setPenWidth()

int QwtPlotSpectroCurve::rtti () const [virtual]

Returns:

QwtPlotItem::Rtti_PlotSpectroCurve

Reimplemented from QwtPlotItem.

void QwtPlotSpectroCurve::setColorMap (QwtColorMap * colorMap)

Change the color map

Often it is useful to display the mapping between intensities and colors as an additional plot axis, showing a color bar.

Parameters:

colorMap Color Map

See also:

colorMap(), setColorRange(), QwtColorMap::color(), QwtScaleWidget::setColorBarEnabled(), QwtScaleWidget::setColorMap()

void QwtPlotSpectroCurve::setColorRange (const QwtInterval & interval)

Set the value interval, that corresponds to the color map

Parameters:

interval interval.minValue() corresponds to 0.0, interval.maxValue() to 1.0 on the color map.

See also:

colorRange(), setColorMap(), QwtColorMap::color()

void QwtPlotSpectroCurve::setPaintAttribute (PaintAttribute attribute, bool on = true)

Specify an attribute how to draw the curve

Parameters:

attribute Paint attribute
on On/Off /sa PaintAttribute, testPaintAttribute()

void QwtPlotSpectroCurve::setPenWidth (double penWidth)

Assign a pen width

Parameters:

penWidth New pen width

See also:

penWidth()

void QwtPlotSpectroCurve::setSamples (const QVector< QwtPoint3D > & samples)

Initialize data with an array of samples.

Parameters:

samples Vector of points

void QwtPlotSpectroCurve::setSamples (QwtSeriesData< QwtPoint3D > * 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:

data Data

Warning:

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

bool QwtPlotSpectroCurve::testPaintAttribute (PaintAttribute attribute) const

Returns:

True, when attribute is enabled

See also:

PaintAttribute, setPaintAttribute()

Author

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Wed Jan 2 2019 Version 6.1.4