Qwt Polar User's Guide  0.1.0
Public Types | Public Member Functions | Protected Member Functions | List of all members
QwtPolarLayout Class Reference

#include <qwt_polar_layout.h>

Public Types

enum  Options {
  IgnoreScrollbars = 1,
  IgnoreFrames = 2,
  IgnoreTitle = 4,
  IgnoreLegend = 8
}

Public Member Functions

 QwtPolarLayout ()
virtual ~QwtPolarLayout ()
void setLegendPosition (QwtPolarPlot::LegendPosition pos, double ratio)
void setLegendPosition (QwtPolarPlot::LegendPosition pos)
QwtPolarPlot::LegendPosition legendPosition () const
void setLegendRatio (double ratio)
double legendRatio () const
virtual QSize minimumSizeHint (const QwtPolarPlot *) const
virtual void activate (const QwtPolarPlot *, const QRect &rect, int options=0)
virtual void invalidate ()
const QRect & titleRect () const
const QRect & legendRect () const
const QRect & canvasRect () const

Protected Member Functions

QRect layoutLegend (int options, const QRect &) 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 QwtPolarPlot::renderTo() to render its content to a QPaintDevice like a QPrinter, QPixmap/QImage or QSvgRenderer.

Member Enumeration Documentation

Options to configure the plot layout engine

  • IgnoreScrollbars
    Ignore the dimension of the scrollbars. There are no scrollbars, when the plot is rendered to a paint device (QwtPolarPlot::renderTo() ).
  • IgnoreFrames
    Ignore all frames. QwtPolarPlot::renderTo() doesn't paint them.
  • IgnoreTitle
    Ignore the title.
  • IgnoreLegend
    Ignore the legend.

Constructor & Destructor Documentation

QwtPolarLayout::QwtPolarLayout ( )
explicit

Constructor.

QwtPolarLayout::~QwtPolarLayout ( )
virtual

Destructor.

Member Function Documentation

void QwtPolarLayout::activate ( const QwtPolarPlot plot,
const QRect &  boundingRect,
int  options = 0 
)
virtual

Recalculate the geometry of all components.

Parameters
plotPlot to be layout
boundingRectRect where to place the components
optionsOptions
See Also
invalidate(), titleRect(), legendRect(), canvasRect()
const QRect & QwtPolarLayout::canvasRect ( ) const
Returns
Geometry for the canvas
See Also
activate(), invalidate()
void QwtPolarLayout::invalidate ( )
virtual

Invalidate the geometry of all components.

See Also
activate()
QRect QwtPolarLayout::layoutLegend ( int  options,
const QRect &  rect 
) const
protected

Find the geometry for the legend

Parameters
optionsOptions how to layout the legend
rectRectangle where to place the legend
Returns
Geometry for the legend
QwtPolarPlot::LegendPosition QwtPolarLayout::legendPosition ( ) const
Returns
Position of the legend
See Also
setLegendPosition(), QwtPolarPlot::setLegendPosition(), QwtPolarPlot::legendPosition()
double QwtPolarLayout::legendRatio ( ) const
Returns
The relative size of the legend in the plot.
See Also
setLegendPosition()
const QRect & QwtPolarLayout::legendRect ( ) const
Returns
Geometry for the legend
See Also
activate(), invalidate()
QSize QwtPolarLayout::minimumSizeHint ( const QwtPolarPlot ) const
virtual

Return a minimum size hint.

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

Specify the position of the legend.

Parameters
posThe legend's position.
ratioRatio between legend and the bounding rect of title, canvas and axes. The legend will be shrinked 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()
void QwtPolarLayout::setLegendPosition ( QwtPolarPlot::LegendPosition  pos)

Specify the position of the legend.

Parameters
posThe legend's position. Valid values are QwtPolarPlot::LeftLegend, QwtPolarPlot::RightLegend, QwtPolarPlot::TopLegend, QwtPolarPlot::BottomLegend.
See Also
QwtPolarPlot::setLegendPosition()
void QwtPolarLayout::setLegendRatio ( double  ratio)

Specify the relative size of the legend in the plot

Parameters
ratioRatio between legend and the bounding rect of title, canvas and axes. The legend will be shrinked 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.
const QRect & QwtPolarLayout::titleRect ( ) const
Returns
Geometry for the title
See Also
activate(), invalidate()