QwtPlotZoneItem - Man Page

A plot item, which displays a zone.

Synopsis

#include <qwt_plot_zoneitem.h>

Inherits QwtPlotItem.

Public Member Functions

QwtPlotZoneItem ()
Constructor.
virtual ~QwtPlotZoneItem ()
Destructor.
virtual int rtti () const
void setOrientation (Qt::Orientation)
Set the orientation of the zone.
Qt::Orientation orientation ()
void setInterval (double min, double max)
void setInterval (const QwtInterval &)
QwtInterval interval () const
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 &)
Assign a brush.
const QBrush & brush () const
virtual void draw (QPainter *, const QwtScaleMap &, const QwtScaleMap &, const QRectF &) const
virtual QRectF boundingRect () const

Additional Inherited Members

Detailed Description

A plot item, which displays a zone.

A horizontal zone highlights an interval of the y axis - a vertical zone an interval of the x axis - and is unbounded in the opposite direction. It is filled with a brush and its border lines are optionally displayed with a pen.

Note

For displaying an area that is bounded for x and y coordinates use QwtPlotShapeItem

Constructor & Destructor Documentation

QwtPlotZoneItem::QwtPlotZoneItem () [explicit]

Constructor. Initializes the zone with no pen and a semi transparent gray brush

Sets the following item attributes:

  • QwtPlotItem::AutoScale: false
  • QwtPlotItem::Legend: false

The z value is initialized by 5

See also

QwtPlotItem::setItemAttribute(), QwtPlotItem::setZ()

Member Function Documentation

QRectF QwtPlotZoneItem::boundingRect () const [virtual]

The bounding rectangle is build from the interval in one direction and something invalid for the opposite direction.

Returns

An invalid rectangle with valid boundaries in one direction

Reimplemented from QwtPlotItem.

const QBrush & QwtPlotZoneItem::brush () const

Returns

Brush used to fill the zone

See also

setPen(), brush()

void QwtPlotZoneItem::draw (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRectF & canvasRect) const [virtual]

Draw the zone

Parameters

painter Painter
xMap x Scale Map
yMap y Scale Map
canvasRect Contents rectangle of the canvas in painter coordinates

Implements QwtPlotItem.

QwtInterval QwtPlotZoneItem::interval () const

Returns

Zone interval

See also

setInterval(), orientation()

Qt::Orientation QwtPlotZoneItem::orientation ()

Returns

Orientation of the zone

See also

setOrientation()

const QPen & QwtPlotZoneItem::pen () const

Returns

Pen used to draw the border lines

See also

setPen(), brush()

int QwtPlotZoneItem::rtti () const [virtual]

Returns

QwtPlotItem::Rtti_PlotZone

Reimplemented from QwtPlotItem.

void QwtPlotZoneItem::setBrush (const QBrush & brush)

Assign a brush. The brush is used to fill the zone

Parameters

brush Brush

See also

pen(), setBrush()

void QwtPlotZoneItem::setInterval (const QwtInterval & interval)

Set the interval of the zone

For a horizontal zone the interval is related to the y axis, for a vertical zone it is related to the x axis.

Parameters

interval Zone interval

See also

interval(), setOrientation()

void QwtPlotZoneItem::setInterval (double min, double max)

Set the interval of the zone

For a horizontal zone the interval is related to the y axis, for a vertical zone it is related to the x axis.

Parameters

min Minimum of the interval
max Maximum of the interval

See also

interval(), setOrientation()

void QwtPlotZoneItem::setOrientation (Qt::Orientation orientation)

Set the orientation of the zone. A horizontal zone highlights an interval of the y axis, a vertical zone of the x axis. It is unbounded in the opposite direction.

See also

orientation(), QwtPlotItem::setAxes()

void QwtPlotZoneItem::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

color Pen color
width Pen width
style Pen style

See also

pen(), brush()

void QwtPlotZoneItem::setPen (const QPen & pen)

Assign a pen. The pen is used to draw the border lines of the zone

Parameters

pen Pen

See also

pen(), setBrush()

Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.

Info

Mon Jun 1 2020 Version 6.1.5 Qwt User's Guide