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())
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 *, 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

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.

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.

QwtPlotIntervalCurve::QwtPlotIntervalCurve (const QString & title = QString()) [explicit]¶

Constructor

Parameters:

QwtPlotIntervalCurve::QwtPlotIntervalCurve (const QwtText & title) [explicit]¶

Constructor

Parameters:

QRectF QwtPlotIntervalCurve::boundingRect () const [virtual]¶

Returns:

Reimplemented from QwtPlotSeriesItem.

const QBrush & QwtPlotIntervalCurve::brush () const¶

Returns:

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

Draw a subset of the samples

Parameters:

See also:

Implements QwtPlotSeriesItem.

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:

See also:

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:

See also:

QwtGraphic QwtPlotIntervalCurve::legendIcon (int index, const QSizeF & size) const [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:

See also:

Reimplemented from QwtPlotItem.

const QPen & QwtPlotIntervalCurve::pen () const¶

Returns:

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int QwtPlotIntervalCurve::rtti () const [virtual]¶

Returns:

Reimplemented from QwtPlotItem.

void QwtPlotIntervalCurve::setBrush (const QBrush & brush)¶

Assign a brush.

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

Parameters:

See also:

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

Specify an attribute how to draw the curve

Parameters:

See also:

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:

See also:

void QwtPlotIntervalCurve::setPen (const QPen & pen)¶

Assign a pen.

Parameters:

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void QwtPlotIntervalCurve::setSamples (const QVector< QwtIntervalSample > & samples)¶

Initialize data with an array of samples.

Parameters:

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:

void QwtPlotIntervalCurve::setStyle (CurveStyle style)¶

Set the curve's drawing style

Parameters:

See also:

void QwtPlotIntervalCurve::setSymbol (const QwtIntervalSymbol * symbol)¶

Assign a symbol.

Parameters:

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QwtPlotIntervalCurve::CurveStyle QwtPlotIntervalCurve::style () const¶

Returns:

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const QwtIntervalSymbol * QwtPlotIntervalCurve::symbol () const¶

Returns:

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bool QwtPlotIntervalCurve::testPaintAttribute (PaintAttribute attribute) const¶

Returns:

See also: