Qwt Polar User's Guide 1.1.1

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QwtPolarRenderer Class Reference

Renderer for exporting a polar plot to a document, a printer or anything else, that is supported by QPainter/QPaintDevice. More...

`#include <qwt_polar_renderer.h>`

Inheritance diagram for QwtPolarRenderer:
[legend]

## Public Member Functions
| QwtPolarRenderer (QObject *parent=NULL)
virtual | ~QwtPolarRenderer ()
| Destructor.
void | renderDocument (QwtPolarPlot *, const QString &format, const QSizeF &sizeMM, int resolution=85)
void | renderDocument (QwtPolarPlot *, const QString &title, const QString &format, const QSizeF &sizeMM, int resolution=85)
void | renderTo (QwtPolarPlot *, QPrinter &) const
| Render the plot to a QPrinter. More...
void | renderTo (QwtPolarPlot *, QPaintDevice &) const
| Render the plot to a `QPaintDevice`. More...
virtual void | render (QwtPolarPlot *, QPainter *, const QRectF &rect) const
| Render the plot to a given rectangle ( f.e QPrinter, QSvgRenderer ) More...
bool | exportTo (QwtPolarPlot *, const QString &documentName, const QSizeF &sizeMM=QSizeF(200, 200), int resolution=85)
| Execute a file dialog and render the plot to the selected file. More...
virtual void | renderTitle (QPainter *, const QRectF &) const
virtual void | renderLegend (const QwtPolarPlot *, QPainter *, const QRectF &) const

## Detailed Description

Renderer for exporting a polar plot to a document, a printer or anything else, that is supported by QPainter/QPaintDevice.

## Constructor & Destructor Documentation

QwtPolarRenderer::QwtPolarRenderer | ( | QObject * | parent = `NULL` | ) |
| explicit

Constructor

Parameters

  parent | Parent object

## Member Function Documentation

bool QwtPolarRenderer::exportTo | ( | QwtPolarPlot * | plot,
|  | const QString & | documentName,
|  | const QSizeF & | sizeMM = `QSizeF( 200, 200 )`,
|  | int | resolution = `85`
| ) |  |

Execute a file dialog and render the plot to the selected file.

The document will be rendered in 85 dpi for a size 30x30 cm

Parameters

  plot | Plot widget
  documentName | Default document name
  sizeMM | Size for the document in millimeters.
  resolution | Resolution in dots per Inch (dpi)

See Also
  renderDocument()

void QwtPolarRenderer::render | ( | QwtPolarPlot * | plot,
|  | QPainter * | painter,
|  | const QRectF & | plotRect
| ) |  | const
| virtual

Render the plot to a given rectangle ( f.e QPrinter, QSvgRenderer )

Parameters

  plot | Plot widget to be rendered
  painter | Painter
  plotRect | Bounding rectangle for the plot

void QwtPolarRenderer::renderDocument | ( | QwtPolarPlot * | plot,
|  | const QString & | fileName,
|  | const QSizeF & | sizeMM,
|  | int | resolution = `85`
| ) |  |

Render a polar plot to a file

The format of the document will be autodetected from the suffix of the filename.

Parameters

  plot | Plot widget
  fileName | Path of the file, where the document will be stored
  sizeMM | Size for the document in millimeters.
  resolution | Resolution in dots per Inch (dpi)

void QwtPolarRenderer::renderDocument | ( | QwtPolarPlot * | plot,
|  | const QString & | fileName,
|  | const QString & | format,
|  | const QSizeF & | sizeMM,
|  | int | resolution = `85`
| ) |  |

Render a plot to a file

Supported formats are:

- pdf
- ps
- svg
- all image formats supported by Qt, see QImageWriter::supportedImageFormats()

Parameters

  plot | Plot widget
  fileName | Path of the file, where the document will be stored
  format | Format for the document
  sizeMM | Size for the document in millimeters.
  resolution | Resolution in dots per Inch (dpi)

See Also
  renderTo(), render(), QwtPainter::setRoundingAlignment()

void QwtPolarRenderer::renderLegend | ( | const QwtPolarPlot * | plot,
|  | QPainter * | painter,
|  | const QRectF & | rect
| ) |  | const
| virtual

Render the legend into a given rectangle.

Parameters

  plot | Plot widget
  painter | Painter
  rect | Bounding rectangle

void QwtPolarRenderer::renderTitle | ( | QPainter * | painter,
|  | const QRectF & | rect
| ) |  | const
| virtual

Render the title into a given rectangle.

Parameters

  painter | Painter
  rect | Bounding rectangle

void QwtPolarRenderer::renderTo | ( | QwtPolarPlot * | plot,
|  | QPrinter & | printer
| ) |  | const

Render the plot to a QPrinter.

This function renders the contents of a QwtPolarPlot instance to `QPaintDevice` object. The size is derived from the printer metrics.

Parameters

  plot | Plot to be rendered
  printer | Printer to paint on

See Also
  renderDocument(), render(), QwtPainter::setRoundingAlignment()

void QwtPolarRenderer::renderTo | ( | QwtPolarPlot * | plot,
|  | QPaintDevice & | paintDevice
| ) |  | const

Render the plot to a `QPaintDevice`.

This function renders the contents of a QwtPolarPlot instance to `QPaintDevice` object. The target rectangle is derived from its device metrics.

Parameters

  plot | Plot to be rendered
  paintDevice | device to paint on, f.e a QImage

See Also
  renderDocument(), render(), QwtPainter::setRoundingAlignment()