QwtPolarLayout - Layout class for QwtPolarPlot.

NAME SYNOPSIS Public Types Public Member Functions Protected Member Functions Detailed Description Member Typedef Documentation typedef QFlags<Option > QwtPolarLayout::Options Member Enumeration Documentation enum QwtPolarLayout::Option Constructor & Destructor Documentation QwtPolarLayout::QwtPolarLayout () [explicit] QwtPolarLayout::˜QwtPolarLayout () [virtual] Member Function Documentation void QwtPolarLayout::activate (const QwtPolarPlot * plot, const QRectF &boundingRect, Options options = Options()) [virtual] const QRectF & QwtPolarLayout::canvasRect () const void QwtPolarLayout::invalidate () [virtual] QRectF QwtPolarLayout::layoutLegend (Options options, QRectF & rect) const[protected] QwtPolarPlot::LegendPosition QwtPolarLayout::legendPosition () const double QwtPolarLayout::legendRatio () const const QRectF & QwtPolarLayout::legendRect () const void QwtPolarLayout::setLegendPosition (QwtPolarPlot::LegendPosition pos) void QwtPolarLayout::setLegendPosition (QwtPolarPlot::LegendPosition pos,double ratio) void QwtPolarLayout::setLegendRatio (double ratio) const QRectF & QwtPolarLayout::titleRect () const Author

NAME

QwtPolarLayout − Layout class for QwtPolarPlot.

enum Option { IgnoreScrollbars = 0x01, IgnoreFrames = 0x02, IgnoreTitle = 0x04, IgnoreLegend = 0x08 }
Options to configure the plot layout engine.
typedef QFlags< Option > Options

Public Member Functions

QwtPolarLayout ()
Constructor.
virtual ˜QwtPolarLayout ()
Destructor.
void setLegendPosition (QwtPolarPlot::LegendPosition pos, double ratio)
Specify the position of the legend.
void setLegendPosition (QwtPolarPlot::LegendPosition pos)
Specify the position of the legend.
QwtPolarPlot::LegendPosition legendPosition () const
void setLegendRatio (double ratio)
double legendRatio () const
virtual void activate (const QwtPolarPlot *, const QRectF &rect, Options options=Options())
Recalculate the geometry of all components.
virtual void invalidate ()
const QRectF & titleRect () const
const QRectF & legendRect () const
const QRectF & canvasRect () const

Protected Member Functions

QRectF layoutLegend (Options options, QRectF &) const

Detailed Description

Layout class for QwtPolarPlot.

Organizes the geometry for the different QwtPolarPlot components. It is used by the QwtPolar widget to organize its internal widgets or by QwtPolarRnderer to render its content to a QPaintDevice like a QPrinter, QPixmap/QImage or QSvgRenderer.

Definition at line 23 of file qwt_polar_layout.h.

Member Typedef Documentation

typedef QFlags<Option > QwtPolarLayout::Options

An ORed combination of Option values.

Definition at line 43 of file qwt_polar_layout.h.

Member Enumeration Documentation

enum QwtPolarLayout::Option

Options to configure the plot layout engine.

Enumerator
IgnoreScrollbars

Ignore the dimension of the scrollbars.

IgnoreFrames

Ignore all frames.

IgnoreTitle

Ignore the title.

IgnoreLegend

Ignore the legend.

Definition at line 28 of file qwt_polar_layout.h.

Constructor & Destructor Documentation

QwtPolarLayout::QwtPolarLayout () [explicit]

Constructor.

Definition at line 114 of file qwt_polar_layout.cpp.

QwtPolarLayout::˜QwtPolarLayout () [virtual]

Destructor.

Definition at line 123 of file qwt_polar_layout.cpp.

Member Function Documentation

void QwtPolarLayout::activate (const QwtPolarPlot * plot, const QRectF &boundingRect, Options options = Options()) [virtual]

Recalculate the geometry of all components.

Parameters

plot Plot to be layout
boundingRect Rect where to place the components
options Options

See also

invalidate(), titleRect(), legendRect(), canvasRect()

Definition at line 344 of file qwt_polar_layout.cpp.

const QRectF & QwtPolarLayout::canvasRect () const

Returns

Geometry for the canvas

See also

activate(), invalidate()

Definition at line 248 of file qwt_polar_layout.cpp.

void QwtPolarLayout::invalidate () [virtual]

Invalidate the geometry of all components.

See also

activate()

Definition at line 257 of file qwt_polar_layout.cpp.

QRectF QwtPolarLayout::layoutLegend (Options options, QRectF & rect) const[protected]

Find the geometry for the legend

Parameters

options Options how to layout the legend
rect Rectangle where to place the legend

Returns

Geometry for the legend

Definition at line 269 of file qwt_polar_layout.cpp.

QwtPolarPlot::LegendPosition QwtPolarLayout::legendPosition () const

Returns

Position of the legend

See also

setLegendPosition(), QwtPolarPlot::setLegendPosition(), QwtPolarPlot::legendPosition()

Definition at line 196 of file qwt_polar_layout.cpp.

double QwtPolarLayout::legendRatio () const

Returns

The relative size of the legend in the plot.

See also

setLegendPosition()

Definition at line 219 of file qwt_polar_layout.cpp.

const QRectF & QwtPolarLayout::legendRect () const

Returns

Geometry for the legend

See also

activate(), invalidate()

Definition at line 239 of file qwt_polar_layout.cpp.

void QwtPolarLayout::setLegendPosition (QwtPolarPlot::LegendPosition pos)

Specify the position of the legend.

Parameters

pos The legend’s position. Valid values are QwtPolarPlot::LeftLegend, QwtPolarPlot::RightLegend, QwtPolarPlot::TopLegend, QwtPolarPlot::BottomLegend.

See also

QwtPolarPlot::setLegendPosition()

Definition at line 186 of file qwt_polar_layout.cpp.

void QwtPolarLayout::setLegendPosition (QwtPolarPlot::LegendPosition pos,double ratio)

Specify the position of the legend.

Parameters

pos The legend’s position.
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

QwtPolarPlot::setLegendPosition()

Definition at line 141 of file qwt_polar_layout.cpp.

void QwtPolarLayout::setLegendRatio (double ratio)

Specify the relative size of the legend in the plot

Parameters

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.

Definition at line 210 of file qwt_polar_layout.cpp.

const QRectF & QwtPolarLayout::titleRect () const

Returns

Geometry for the title

See also

activate(), invalidate()

Definition at line 229 of file qwt_polar_layout.cpp.

Author

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Updated 2026-06-01 - jenkler.se | uex.se