QwtPlotZoneItem - A plot item, which displays a zone.

NAME  SYNOPSIS  Public Member Functions  Additional Inherited Members  Detailed Description  Constructor & Destructor Documentation  QwtPlotZoneItem::QwtPlotZoneItem () [explicit]  QwtPlotZoneItem::˜QwtPlotZoneItem () [virtual]  Member Function Documentation  QRectF QwtPlotZoneItem::boundingRect () const [override], [virtual]  const QBrush & QwtPlotZoneItem::brush () const  void QwtPlotZoneItem::draw (QPainter * painter, const QwtScaleMap & xMap,const QwtScaleMap & yMap, const QRectF & canvasRect) const [override],[virtual]  QwtInterval QwtPlotZoneItem::interval () const  Qt::Orientation QwtPlotZoneItem::orientation () const  const QPen & QwtPlotZoneItem::pen () const  int QwtPlotZoneItem::rtti () const [override], [virtual]  void QwtPlotZoneItem::setBrush (const QBrush & brush)  void QwtPlotZoneItem::setInterval (const QwtInterval & interval)  void QwtPlotZoneItem::setInterval (double min, double max)  void QwtPlotZoneItem::setOrientation (Qt::Orientation orientation)  void QwtPlotZoneItem::setPen (const QColor & color, qreal width = 0.0,Qt::PenStyle style = Qt::SolidLine)  void QwtPlotZoneItem::setPen (const QPen & pen)  Author 

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NAME

QwtPlotZoneItem − 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 override
void setOrientation (Qt::Orientation)
Set the orientation of the zone.
Qt::Orientation orientation () const
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 &canvasRect) const override
virtual QRectF boundingRect () const override

Public Member Functions inherited from QwtPlotItem

QwtPlotItem ()
QwtPlotItem (const QString &title)
QwtPlotItem (const QwtText &title)
virtual ˜QwtPlotItem ()
Destroy the QwtPlotItem.
void attach (QwtPlot *plot)
Attach the item to a plot.
void detach ()
This method detaches a QwtPlotItem from any QwtPlot it has been associated with.
QwtPlot * plot () const
Return attached plot.
void setTitle (const QString &title)
void setTitle (const QwtText &title)
const QwtText & title () const
void setItemAttribute (ItemAttribute, bool on=true)
bool testItemAttribute (ItemAttribute) const
void setItemInterest (ItemInterest, bool on=true)
bool testItemInterest (ItemInterest) const
void setRenderHint (RenderHint, bool on=true)
bool testRenderHint (RenderHint) const
void setRenderThreadCount (uint numThreads)
uint renderThreadCount () const
void setLegendIconSize (const QSize &)
QSize legendIconSize () const
double z () const
void setZ (double z)
Set the z value.
void show ()
Show the item.
void hide ()
Hide the item.
virtual void setVisible (bool)
bool isVisible () const
void setAxes (QwtAxisId xAxis, QwtAxisId yAxis)
void setXAxis (QwtAxisId)
QwtAxisId xAxis () const
Return xAxis.
void setYAxis (QwtAxisId)
QwtAxisId yAxis () const
Return yAxis.
virtual void itemChanged ()
virtual void legendChanged ()
virtual void getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const
Calculate a hint for the canvas margin.
virtual void updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
Update the item to changes of the axes scale division.
virtual void updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &)
Update the item to changes of the legend info.
QRectF scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
Calculate the bounding scale rectangle of 2 maps.
QRectF paintRect (const QwtScaleMap &, const QwtScaleMap &) const
Calculate the bounding paint rectangle of 2 maps.
virtual QList< QwtLegendData > legendData () const
Return all information, that is needed to represent the item on the legend.
virtual QwtGraphic legendIcon (int index, const QSizeF &) const

Additional Inherited Members

Public Types inherited from QwtPlotItem

enum RttiValues { Rtti_PlotItem = 0, Rtti_PlotGrid, Rtti_PlotScale, Rtti_PlotLegend, Rtti_PlotMarker, Rtti_PlotCurve, Rtti_PlotSpectroCurve, Rtti_PlotIntervalCurve, Rtti_PlotHistogram, Rtti_PlotSpectrogram, Rtti_PlotGraphic, Rtti_PlotTradingCurve, Rtti_PlotBarChart, Rtti_PlotMultiBarChart, Rtti_PlotShape, Rtti_PlotTextLabel, Rtti_PlotZone, Rtti_PlotVectorField, Rtti_PlotUserItem = 1000 }
Runtime type information.
enum ItemAttribute { Legend = 0x01, AutoScale = 0x02, Margins = 0x04 }
Plot Item Attributes.
enum ItemInterest { ScaleInterest = 0x01, LegendInterest = 0x02 }
Plot Item Interests.
enum RenderHint { RenderAntialiased = 0x1 }
Render hints.
typedef QFlags< ItemAttribute > ItemAttributes
typedef QFlags< ItemInterest > ItemInterests
typedef QFlags< RenderHint > RenderHints

Protected Member Functions inherited from QwtPlotItem

QwtGraphic defaultIcon (const QBrush &, const QSizeF &) const
Return a default icon from a brush.

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

Definition at line 33 of file qwt_plot_zoneitem.h.

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()

Definition at line 50 of file qwt_plot_zoneitem.cpp.

QwtPlotZoneItem::˜QwtPlotZoneItem () [virtual]

Destructor.

Definition at line 62 of file qwt_plot_zoneitem.cpp.

Member Function Documentation

QRectF QwtPlotZoneItem::boundingRect () const [override], [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.

Definition at line 297 of file qwt_plot_zoneitem.cpp.

const QBrush & QwtPlotZoneItem::brush () const

Returns

Brush used to fill the zone

See also

setPen(), brush()

Definition at line 138 of file qwt_plot_zoneitem.cpp.

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

Definition at line 223 of file qwt_plot_zoneitem.cpp.

QwtInterval QwtPlotZoneItem::interval () const

Returns

Zone interval

See also

setInterval(), orientation()

Definition at line 209 of file qwt_plot_zoneitem.cpp.

Qt::Orientation QwtPlotZoneItem::orientation () const

Returns

Orientation of the zone

See also

setOrientation()

Definition at line 165 of file qwt_plot_zoneitem.cpp.

const QPen & QwtPlotZoneItem::pen () const

Returns

Pen used to draw the border lines

See also

setPen(), brush()

Definition at line 112 of file qwt_plot_zoneitem.cpp.

int QwtPlotZoneItem::rtti () const [override], [virtual]

Returns

QwtPlotItem::Rtti_PlotZone

Reimplemented from QwtPlotItem.

Definition at line 68 of file qwt_plot_zoneitem.cpp.

void QwtPlotZoneItem::setBrush (const QBrush & brush)

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

Parameters

brush Brush

See also

pen(), setBrush()

Definition at line 125 of file qwt_plot_zoneitem.cpp.

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()

Definition at line 196 of file qwt_plot_zoneitem.cpp.

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()

Definition at line 181 of file qwt_plot_zoneitem.cpp.

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()

Definition at line 152 of file qwt_plot_zoneitem.cpp.

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()

Definition at line 86 of file qwt_plot_zoneitem.cpp.

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()

Definition at line 99 of file qwt_plot_zoneitem.cpp.

Author

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