A plotting widget, displaying a polar coordinate system. More...

#include <qwt_polar_plot.h>

Inheritance diagram for QwtPolarPlot:

Classes
class	PrivateData

Public Types
enum	LegendPosition { LeftLegend , RightLegend , BottomLegend , TopLegend , ExternalLegend }
	Position of the legend, relative to the canvas. More...

Public Slots
virtual void	replot ()
	Replot the plot.

void	autoRefresh ()
	Auto refresh the plot.

void	setAzimuthOrigin (double)
	Set the azimuth origin.

Signals
void	itemAttached (QwtPolarItem *plotItem, bool on)
	A signal indicating, that an item has been attached/detached.

void	legendDataChanged (const QVariant &itemInfo, const QList< QwtLegendData > &data)
	A signal with the attributes how to update the legend entries for a plot item.

void	layoutChanged ()
	A signal that is emitted, whenever the layout of the plot has been recalculated.

Public Member Functions
	QwtPolarPlot (QWidget *parent=nullptr)
	Constructor.

	QwtPolarPlot (const QwtText &title, QWidget *parent=nullptr)
	Constructor with title.

	~QwtPolarPlot () override
	Destructor.

void	setTitle (const QString &)
	Set the title.

void	setTitle (const QwtText &)
	Set the title.

QwtText	title () const
	Get the title.

QwtTextLabel *	titleLabel ()
	Get the title label.

const QwtTextLabel *	titleLabel () const
	Get the title label (const version)

void	setAutoReplot (bool tf=true)
	Set auto replot.

bool	autoReplot () const
	Get auto replot.

void	setAutoScale (int scaleId)
	Set auto scale for a scale.

bool	hasAutoScale (int scaleId) const
	Check if a scale has auto scale.

void	setScaleMaxMinor (int scaleId, int maxMinor)
	Set the maximum number of minor ticks for a scale.

int	scaleMaxMinor (int scaleId) const
	Get the maximum number of minor ticks for a scale.

int	scaleMaxMajor (int scaleId) const
	Get the maximum number of major ticks for a scale.

void	setScaleMaxMajor (int scaleId, int maxMajor)
	Set the maximum number of major ticks for a scale.

QwtScaleEngine *	scaleEngine (int scaleId)
	Get the scale engine for a scale.

const QwtScaleEngine *	scaleEngine (int scaleId) const
	Get the scale engine for a scale (const version)

void	setScaleEngine (int scaleId, QwtScaleEngine *)
	Set the scale engine for a scale.

void	setScale (int scaleId, double min, double max, double step=0)
	Set the scale for a scale.

void	setScaleDiv (int scaleId, const QwtScaleDiv &)
	Set the scale division for a scale.

const QwtScaleDiv *	scaleDiv (int scaleId) const
	Get the scale division for a scale (const version)

QwtScaleDiv *	scaleDiv (int scaleId)
	Get the scale division for a scale.

QwtScaleMap	scaleMap (int scaleId, double radius) const
	Get the scale map for a scale with radius.

QwtScaleMap	scaleMap (int scaleId) const
	Get the scale map for a scale.

void	updateScale (int scaleId)
	Update a scale.

double	azimuthOrigin () const
	Get the azimuth origin.

void	zoom (const QwtPointPolar &, double factor)
	Zoom to a position with a factor.

void	unzoom ()
	Unzoom the plot.

QwtPointPolar	zoomPos () const
	Get the zoom position.

double	zoomFactor () const
	Get the zoom factor.

QwtPolarCanvas *	canvas ()
	Get the canvas.

const QwtPolarCanvas *	canvas () const
	Get the canvas (const version)

void	setPlotBackground (const QBrush &c)
	Set the plot background.

const QBrush &	plotBackground () const
	Get the plot background.

void	setBackgroundColor (const QColor &c)
	Set the background color.

QColor	backgroundColor () const
	Get the background color.

virtual void	drawCanvas (QPainter *, const QRectF &) const
	Draw the canvas.

void	insertLegend (QwtAbstractLegend *, LegendPosition=RightLegend, double ratio=-1.0)
	Insert a legend.

QwtAbstractLegend *	legend ()
	Get the legend.

const QwtAbstractLegend *	legend () const
	Get the legend (const version)

void	updateLegend ()
	Update the legend.

void	updateLegend (const QwtPolarItem *)
	Update the legend for an item.

QwtPolarLayout *	plotLayout ()
	Get the plot layout.

const QwtPolarLayout *	plotLayout () const
	Get the plot layout (const version)

QwtInterval	visibleInterval () const
	Get the visible interval.

QRectF	plotRect () const
	Get the plot rectangle.

QRectF	plotRect (const QRectF &) const
	Get the plot rectangle for a given rectangle.

int	plotMarginHint () const
	Get the plot margin hint.

virtual QVariant	itemToInfo (QwtPolarItem *) const
	Convert an item to info.

virtual QwtPolarItem *	infoToItem (const QVariant &) const
	Convert info to an item.

Public Member Functions inherited from QwtPolarItemDict
	QwtPolarItemDict ()
	Constructor.

	~QwtPolarItemDict ()
	Destructor.

void	setAutoDelete (bool)
	Set auto delete.

bool	autoDelete () const
	Get auto delete.

const QwtPolarItemList &	itemList () const
	Get the item list.

void	detachItems (int rtti=QwtPolarItem::Rtti_PolarItem, bool autoDelete=true)
	Detach items.

Protected Member Functions
virtual bool	event (QEvent *) override
	Handle events.

virtual void	resizeEvent (QResizeEvent *) override
	Handle resize events.

virtual void	updateLayout ()
	Update the layout.

virtual void	drawItems (QPainter *painter, const QwtScaleMap &radialMap, const QwtScaleMap &azimuthMap, const QPointF &pole, double radius, const QRectF &canvasRect) const
	Draw items.

Protected Member Functions inherited from QwtPolarItemDict
void	insertItem (QwtPolarItem *)
	Insert an item.

void	removeItem (QwtPolarItem *)
	Remove an item.

Properties
QBrush	plotBackground

double	azimuthOrigin

Friends
class	QwtPolarItem

Detailed Description

A plotting widget, displaying a polar coordinate system.

An unlimited number of plot items can be displayed on its canvas. Plot items might be curves (QwtPolarCurve), markers (QwtPolarMarker), the grid (QwtPolarGrid), or anything else derived from QwtPolarItem.

The coordinate system is defined by a radial and a azimuth scale. The scales at the axes can be explicitly set (QwtScaleDiv), or are calculated from the plot items, using algorithms (QwtScaleEngine) which can be configured separately for each axis. Autoscaling is supported for the radial scale.

In opposite to QwtPlot the scales might be different from the view, that is displayed on the canvas. The view can be changed by zooming - f.e. by using QwtPolarPanner or QwtPolarMaginfier.

Member Enumeration Documentation

◆ LegendPosition

enum QwtPolarPlot::LegendPosition

Position of the legend, relative to the canvas.

See also: insertLegend()

Enumerator
LeftLegend	The legend will be left from the canvas.
RightLegend	The legend will be right from the canvas.
BottomLegend	The legend will be below the canvas.
TopLegend	The legend will be between canvas and title.
ExternalLegend	External means that only the content of the legend will be handled by QwtPlot, but not its geometry. This might be interesting if an application wants to have a legend in an external window ( or on the canvas ). Note The legend is not painted by QwtPolarRenderer

Constructor & Destructor Documentation

◆ QwtPolarPlot() [1/2]

QwtPolarPlot::QwtPolarPlot ( QWidget * parent = nullptr )

explicit

Constructor.

Parameters

parent Parent widget

◆ QwtPolarPlot() [2/2]

QwtPolarPlot::QwtPolarPlot	(	const QwtText &	title,
		QWidget *	parent = `nullptr`
	)

Constructor with title.

Parameters

title	Title text
parent	Parent widget

Member Function Documentation

◆ autoRefresh

void QwtPolarPlot::autoRefresh ( )

slot

Auto refresh the plot.

Replots the plot if autoReplot() is true.

◆ autoReplot()

bool QwtPolarPlot::autoReplot ( ) const

Get auto replot.

Check if autoReplot option is set.

Returns: true if autoReplot option is set

See also: setAutoReplot()

◆ azimuthOrigin()

double QwtPolarPlot::azimuthOrigin ( ) const

Get the azimuth origin.

Get the origin of the azimuth scale.

The azimuth origin is the angle where the azimuth scale shows the value 0.0.

Returns: Origin of the azimuth scale

See also: setAzimuthOrigin()

◆ backgroundColor()

QColor QwtPolarPlot::backgroundColor ( ) const

Get the background color.

Returns: Background color

See also: setBackgroundColor()

◆ canvas() [1/2]

QwtPolarCanvas * QwtPolarPlot::canvas ( )

Get the canvas.

Get the plot's canvas.

Returns: Canvas widget

◆ canvas() [2/2]

const QwtPolarCanvas * QwtPolarPlot::canvas ( ) const

Get the canvas (const version)

Get the plot's canvas (const version)

Returns: Canvas widget

◆ drawCanvas()

void QwtPolarPlot::drawCanvas	(	QPainter *	painter,
		const QRectF &	canvasRect
	)		const

virtual

Draw the canvas.

Redraw the canvas.

Parameters

painter	Painter used for drawing
canvasRect	Contents rect of the canvas

◆ drawItems()

void QwtPolarPlot::drawItems	(	QPainter *	painter,
		const QwtScaleMap &	azimuthMap,
		const QwtScaleMap &	radialMap,
		const QPointF &	pole,
		double	radius,
		const QRectF &	canvasRect
	)		const

protectedvirtual

Draw items.

Redraw the canvas items.

Parameters

painter	Painter used for drawing
azimuthMap	Maps azimuth values to values related to 0.0, M_2PI
radialMap	Maps radius values into painter coordinates
pole	Position of the pole in painter coordinates
radius	Radius of the complete plot area in painter coordinates
canvasRect	Contents rect of the canvas in painter coordinates

◆ event()

bool QwtPolarPlot::event ( QEvent * e )

overrideprotectedvirtual

Handle events.

Qt event handler.

Handles QEvent::LayoutRequest and QEvent::PolishRequest

Parameters

e Qt Event

Returns: True when the event was processed

◆ hasAutoScale()

bool QwtPolarPlot::hasAutoScale ( int scaleId ) const

Check if a scale has auto scale.

Check if autoscaling is enabled.

Parameters

scaleId Scale index

Returns: true if autoscaling is enabled

See also: setAutoScale()

◆ infoToItem()

QwtPolarItem * QwtPolarPlot::infoToItem ( const QVariant & itemInfo ) const

virtual

Convert info to an item.

Identify the plot item according to an item info object.

The default implementation simply tries to unwrap a QwtPolarItem pointer.

Parameters

itemInfo Item info object generated from itemToInfo()

Returns: A plot item when successful, otherwise nullptr

See also: itemToInfo()

◆ insertLegend()

void QwtPolarPlot::insertLegend	(	QwtAbstractLegend *	legend,
		QwtPolarPlot::LegendPosition	pos = `RightLegend`,
		double	ratio = `-1.0`
	)

Insert a legend.

If the position legend is QwtPolarPlot::LeftLegend or QwtPolarPlot::RightLegend the legend will be organized in one column from top to down. Otherwise the legend items will be placed in a table with a best fit number of columns from left to right. If pos != QwtPolarPlot::ExternalLegend the plot widget will become parent of the legend. It will be deleted when the plot is deleted, or another legend is set with insertLegend().

Parameters

legend	Legend widget
pos	The legend's position. For top/left position the number of columns will be limited to 1, otherwise it will be set to unlimited.
ratio	Ratio between legend and the bounding rect of title, canvas and axes. The legend will be shrunk if it would need more space than the given ratio. The ratio is limited to ]0.0 .. 1.0]. In case of <= 0.0 it will be reset to the default ratio. The default vertical/horizontal ratio is 0.33/0.5.

See also: legend(), QwtPolarLayout::legendPosition(), QwtPolarLayout::setLegendPosition()

◆ itemAttached

void QwtPolarPlot::itemAttached	(	QwtPolarItem *	plotItem,
		bool	on
	)

signal

A signal indicating, that an item has been attached/detached.

Parameters

plotItem	Plot item
on	Attached/Detached

◆ itemToInfo()

QVariant QwtPolarPlot::itemToInfo ( QwtPolarItem * plotItem ) const

virtual

Convert an item to info.

Build an information object to identify a plot item on the legend.

The default implementation simply wraps the plot item into a QVariant object. When overloading itemToInfo() usually infoToItem() needs to be reimplemented too.

Parameters

plotItem Plot item

Returns: QVariant containing the plot item information

See also: infoToItem()

◆ legend() [1/2]

QwtAbstractLegend * QwtPolarPlot::legend ( )

Get the legend.

Get the plot's legend.

Returns: Legend widget

See also: insertLegend()

◆ legend() [2/2]

const QwtAbstractLegend * QwtPolarPlot::legend ( ) const

Get the legend (const version)

Get the plot's legend (const version)

Returns: Legend widget

See also: insertLegend()

◆ legendDataChanged

void QwtPolarPlot::legendDataChanged	(	const QVariant &	itemInfo,
		const QList< QwtLegendData > &	data
	)

signal

A signal with the attributes how to update the legend entries for a plot item.

Parameters

itemInfo	Info about a plot, build from itemToInfo()
data	Attributes of the entries ( usually <= 1 ) for the plot item

See also: itemToInfo(), infoToItem(), QwtAbstractLegend::updateLegend()

◆ plotBackground()

const QBrush & QwtPolarPlot::plotBackground ( ) const

Get the plot background.

Get the plot background brush.

Returns: Background brush

See also: plotBackground(), plotArea()

◆ plotLayout() [1/2]

QwtPolarLayout * QwtPolarPlot::plotLayout ( )

Get the plot layout.

Get the layout responsible for geometry of plot components.

Returns: Plot layout

◆ plotLayout() [2/2]

const QwtPolarLayout * QwtPolarPlot::plotLayout ( ) const

Get the plot layout (const version)

Get the layout responsible for geometry of plot components (const version)

Returns: Plot layout

◆ plotMarginHint()

int QwtPolarPlot::plotMarginHint ( ) const

Get the plot margin hint.

Get the maximum of all item margin hints.

Returns: Maximum margin hint

See also: QwtPolarItem::marginHint()

◆ plotRect() [1/2]

QRectF QwtPolarPlot::plotRect ( ) const

Get the plot rectangle.

Get the bounding rect of the plot area.

The plot area depends on the size of the canvas and the zoom parameters.

Returns: Bounding rect of the plot area

◆ plotRect() [2/2]

QRectF QwtPolarPlot::plotRect ( const QRectF & canvasRect ) const

Get the plot rectangle for a given rectangle.

Calculate the bounding rect of the plot area.

The plot area depends on the zoom parameters.

Parameters

canvasRect Rectangle of the canvas

Returns: Rectangle for displaying 100% of the plot

◆ replot

void QwtPolarPlot::replot ( )

virtualslot

Replot the plot.

Redraw the plot.

If the autoReplot option is not set (which is the default) or if any curves are attached to raw data, the plot has to be refreshed explicitly in order to make changes visible.

Warning: Calls canvas()->repaint, take care of infinite recursions

See also: setAutoReplot()

◆ resizeEvent()

void QwtPolarPlot::resizeEvent ( QResizeEvent * e )

overrideprotectedvirtual

Handle resize events.

Resize and update internal layout.

Parameters

e	Resize event

◆ scaleDiv() [1/2]

QwtScaleDiv * QwtPolarPlot::scaleDiv ( int scaleId )

Get the scale division for a scale.

Return the scale division of a specified scale.

scaleDiv(scaleId)->lBound(), scaleDiv(scaleId)->hBound() are the current limits of the scale.

Parameters

scaleId Scale index

Returns: Scale division

See also: QwtScaleDiv, setScaleDiv(), setScale()

◆ scaleDiv() [2/2]

const QwtScaleDiv * QwtPolarPlot::scaleDiv ( int scaleId ) const

Get the scale division for a scale (const version)

Return the scale division of a specified scale.

scaleDiv(scaleId)->lBound(), scaleDiv(scaleId)->hBound() are the current limits of the scale.

Parameters

scaleId Scale index

Returns: Scale division

See also: QwtScaleDiv, setScaleDiv(), setScale()

◆ scaleEngine() [1/2]

QwtScaleEngine * QwtPolarPlot::scaleEngine ( int scaleId )

Get the scale engine for a scale.

Get scale engine for a specific scale.

Parameters

scaleId Scale index

Returns: Scale engine

See also: setScaleEngine()

◆ scaleEngine() [2/2]

const QwtScaleEngine * QwtPolarPlot::scaleEngine ( int scaleId ) const

Get the scale engine for a scale (const version)

Get scale engine for a specific scale (const version)

Parameters

scaleId Scale index

Returns: Scale engine

See also: setScaleEngine()

◆ scaleMap() [1/2]

QwtScaleMap QwtPolarPlot::scaleMap ( int scaleId ) const

Get the scale map for a scale.

Build a scale map.

The azimuth map translates between the scale values and angles from [0.0, 2 * PI[. The radial map translates scale values into the distance from the pole. The radial map is calculated from the current geometry of the canvas.

Parameters

scaleId Scale index

Returns: Map for the scale on the canvas. With this map pixel coordinates can be translated to plot coordinates and vice versa.

See also: QwtScaleMap, transform(), invTransform()

◆ scaleMap() [2/2]

QwtScaleMap QwtPolarPlot::scaleMap	(	int	scaleId,
		double	radius
	)		const

Get the scale map for a scale with radius.

Build a scale map with specified radius.

The azimuth map translates between the scale values and angles from [0.0, 2 * PI[. The radial map translates scale values into the distance from the pole.

Parameters

scaleId	Scale index
radius	Radius of the plot area in pixels

Returns: Map for the scale on the canvas. With this map pixel coordinates can be translated to plot coordinates and vice versa.

See also: QwtScaleMap, transform(), invTransform()

◆ scaleMaxMajor()

int QwtPolarPlot::scaleMaxMajor ( int scaleId ) const

Get the maximum number of major ticks for a scale.

Get the maximum number of major ticks for a specified axis.

Parameters

scaleId Scale index

Returns: Maximum number of major ticks

See also: setScaleMaxMajor()

◆ scaleMaxMinor()

int QwtPolarPlot::scaleMaxMinor ( int scaleId ) const

Get the maximum number of minor ticks for a scale.

Get the maximum number of minor ticks for a specified axis.

Parameters

scaleId Scale index

Returns: Maximum number of minor ticks

See also: setScaleMaxMinor()

◆ setAutoReplot()

void QwtPolarPlot::setAutoReplot ( bool enable = true )

Set auto replot.

Set or reset the autoReplot option.

If the autoReplot option is set, the plot will be updated implicitly by manipulating member functions. Since this may be time-consuming, it is recommended to leave this option switched off and call replot() explicitly if necessary. The autoReplot option is set to false by default, which means that the user has to call replot() in order to make changes visible.

Parameters

enable true or false. Defaults to true.

See also: replot()

◆ setAutoScale()

void QwtPolarPlot::setAutoScale ( int scaleId )

Set auto scale for a scale.

Enable autoscaling.

This member function is used to switch back to autoscaling mode after a fixed scale has been set. Autoscaling calculates a useful scale division from the bounding interval of all plot items with the QwtPolarItem::AutoScale attribute. Autoscaling is only supported for the radial scale and enabled as default.

Parameters

scaleId Scale index

See also: hasAutoScale(), setScale(), setScaleDiv(), QwtPolarItem::boundingInterval()

◆ setAzimuthOrigin

void QwtPolarPlot::setAzimuthOrigin ( double origin )

slot

Set the azimuth origin.

Change the origin of the azimuth scale.

The azimuth origin is the angle where the azimuth scale shows the value 0.0. The default origin is 0.0.

Parameters

origin New origin

See also: azimuthOrigin()

◆ setBackgroundColor()

void QwtPolarPlot::setBackgroundColor ( const QColor & c )

Set the background color.

Parameters

c	Background color

See also: backgroundColor()

◆ setPlotBackground()

void QwtPolarPlot::setPlotBackground ( const QBrush & brush )

Set the plot background.

Set the background of the plot area.

The plot area is the circle around the pole. Its radius is defined by the radial scale.

Parameters

brush Background brush

See also: plotBackground(), plotArea()

◆ setScale()

void QwtPolarPlot::setScale	(	int	scaleId,
		double	min,
		double	max,
		double	stepSize = `0`
	)

Set the scale for a scale.

Disable autoscaling and specify a fixed scale for a selected scale.

Parameters

scaleId	Scale index
min	Minimum value of the scale
max	Maximum value of the scale
stepSize	Major step size. If `step == 0`, the step size is calculated automatically using the maxMajor setting.

See also: setScaleMaxMajor(), setAutoScale()

◆ setScaleDiv()

void QwtPolarPlot::setScaleDiv	(	int	scaleId,
		const QwtScaleDiv &	scaleDiv
	)

Set the scale division for a scale.

Disable autoscaling and specify a fixed scale for a selected scale.

Parameters

scaleId	Scale index
scaleDiv	Scale division

See also: setScale(), setAutoScale()

◆ setScaleEngine()

void QwtPolarPlot::setScaleEngine	(	int	scaleId,
		QwtScaleEngine *	scaleEngine
	)

Set the scale engine for a scale.

Change the scale engine for an axis.

Parameters

scaleId	Scale index
scaleEngine	Scale engine

See also: axisScaleEngine()

◆ setScaleMaxMajor()

void QwtPolarPlot::setScaleMaxMajor	(	int	scaleId,
		int	maxMajor
	)

Set the maximum number of major ticks for a scale.

Set the maximum number of major scale intervals for a specified scale.

Parameters

scaleId	Scale index
maxMajor	Maximum number of major steps

See also: scaleMaxMajor()

◆ setScaleMaxMinor()

void QwtPolarPlot::setScaleMaxMinor	(	int	scaleId,
		int	maxMinor
	)

Set the maximum number of minor ticks for a scale.

Set the maximum number of minor scale intervals for a specified scale.

Parameters

scaleId	Scale index
maxMinor	Maximum number of minor steps

See also: scaleMaxMajor()

◆ setTitle() [1/2]

void QwtPolarPlot::setTitle ( const QString & title )

Set the title.

Change the plot's title.

Parameters

title New title

◆ setTitle() [2/2]

void QwtPolarPlot::setTitle ( const QwtText & title )

Set the title.

Change the plot's title.

Parameters

title New title

◆ title()

QwtText QwtPolarPlot::title ( ) const

Get the title.

Get the plot's title.

Returns: Title text

◆ titleLabel() [1/2]

QwtTextLabel * QwtPolarPlot::titleLabel ( )

Get the title label.

Get the title label widget.

Returns: Title label widget

◆ titleLabel() [2/2]

const QwtTextLabel * QwtPolarPlot::titleLabel ( ) const

Get the title label (const version)

Get the title label widget (const version)

Returns: Title label widget

◆ unzoom()

void QwtPolarPlot::unzoom ( )

Unzoom the plot.

See also: zoom()

◆ updateLayout()

void QwtPolarPlot::updateLayout ( )

protectedvirtual

Update the layout.

Rebuild the layout.

◆ updateLegend() [1/2]

void QwtPolarPlot::updateLegend ( )

Update the legend.

Emit legendDataChanged() for all plot items.

See also: QwtPlotItem::legendData(), legendDataChanged()

◆ updateLegend() [2/2]

void QwtPolarPlot::updateLegend ( const QwtPolarItem * plotItem )

Update the legend for an item.

Emit legendDataChanged() for a plot item.

Parameters

plotItem Plot item

See also: QwtPlotItem::legendData(), legendDataChanged()

◆ updateScale()

void QwtPolarPlot::updateScale ( int scaleId )

Update a scale.

Rebuild the scale.

Parameters

scaleId Scale index

◆ visibleInterval()

QwtInterval QwtPolarPlot::visibleInterval ( ) const

Get the visible interval.

Get the bounding interval of the radial scale visible on canvas.

Returns: Bounding interval of the radial scale that is visible on the canvas

◆ zoom()

void QwtPolarPlot::zoom	(	const QwtPointPolar &	zoomPos,
		double	zoomFactor
	)

Zoom to a position with a factor.

Translate and in/decrease the zoom factor.

In zoom mode the zoom position is in the center of the canvas. The radius of the circle depends on the size of the plot canvas, that is divided by the zoom factor. Thus a factor < 1.0 zooms in. Setting an invalid zoom position disables zooming.

Parameters

zoomPos	Center of the translation
zoomFactor	Zoom factor

See also: unzoom(), zoomPos(), zoomFactor()

◆ zoomFactor()

double QwtPolarPlot::zoomFactor ( ) const

Get the zoom factor.

Returns: Zoom factor

See also: zoom(), zoomPos()

◆ zoomPos()

QwtPointPolar QwtPolarPlot::zoomPos ( ) const

Get the zoom position.

Returns: Zoom position

See also: zoom(), zoomFactor()

The documentation for this class was generated from the following files:

/home/runner/work/QWT/QWT/src/plot/qwt_polar_plot.h
/home/runner/work/QWT/QWT/src/plot/qwt_polar_plot.cpp

Classes

Public Types

Public Slots

Signals

Public Member Functions

Protected Member Functions

Properties

Friends

Detailed Description

Member Enumeration Documentation

◆ LegendPosition

Constructor & Destructor Documentation

◆ QwtPolarPlot() [1/2]

◆ QwtPolarPlot() [2/2]

Member Function Documentation

◆ autoRefresh

◆ autoReplot()

◆ azimuthOrigin()

◆ backgroundColor()

◆ canvas() [1/2]

◆ canvas() [2/2]

◆ drawCanvas()

◆ drawItems()

◆ event()

◆ hasAutoScale()

◆ infoToItem()

◆ insertLegend()

◆ itemAttached

◆ itemToInfo()

◆ legend() [1/2]

◆ legend() [2/2]

◆ legendDataChanged

◆ plotBackground()

◆ plotLayout() [1/2]

◆ plotLayout() [2/2]

◆ plotMarginHint()

◆ plotRect() [1/2]

◆ plotRect() [2/2]

◆ replot

◆ resizeEvent()

◆ scaleDiv() [1/2]

◆ scaleDiv() [2/2]

◆ scaleEngine() [1/2]

◆ scaleEngine() [2/2]

◆ scaleMap() [1/2]

◆ scaleMap() [2/2]

◆ scaleMaxMajor()

◆ scaleMaxMinor()

◆ setAutoReplot()

◆ setAutoScale()

◆ setAzimuthOrigin

◆ setBackgroundColor()

◆ setPlotBackground()

◆ setScale()

◆ setScaleDiv()

◆ setScaleEngine()

◆ setScaleMaxMajor()

◆ setScaleMaxMinor()

◆ setTitle() [1/2]

◆ setTitle() [2/2]

◆ title()

◆ titleLabel() [1/2]

◆ titleLabel() [2/2]

◆ unzoom()

◆ updateLayout()

◆ updateLegend() [1/2]

◆ updateLegend() [2/2]

◆ updateScale()

◆ visibleInterval()

◆ zoom()

◆ zoomFactor()

◆ zoomPos()