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 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
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
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.
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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