QwtPlotRenderer (3)

#include <qwt_plot_renderer.h>

Public Types

enum DiscardFlag { DiscardNone = 0x00, DiscardBackground = 0x01, DiscardTitle = 0x02, DiscardLegend = 0x04, DiscardCanvasBackground = 0x08 }

enum LayoutFlag { DefaultLayout = 0x00, KeepFrames = 0x01, FrameWithScales = 0x02 }

typedef QFlags< DiscardFlag > DiscardFlags

typedef QFlags< LayoutFlag > LayoutFlags

Public Member Functions

QwtPlotRenderer (QObject *=NULL)

virtual ~QwtPlotRenderer ()

void setDiscardFlag (DiscardFlag flag, bool on=true)

bool testDiscardFlag (DiscardFlag flag) const

void setDiscardFlags (DiscardFlags flags)

DiscardFlags discardFlags () const

void setLayoutFlag (LayoutFlag flag, bool on=true)

bool testLayoutFlag (LayoutFlag flag) const

void setLayoutFlags (LayoutFlags flags)

LayoutFlags layoutFlags () const

void renderDocument (QwtPlot *, const QString &format, const QSizeF &sizeMM, int resolution=85)

void renderDocument (QwtPlot *, const QString &title, const QString &format, const QSizeF &sizeMM, int resolution=85)

void renderTo (QwtPlot *, QPrinter &) const

void renderTo (QwtPlot *, QPaintDevice &p) const

virtual void render (QwtPlot *, QPainter *, const QRectF &rect) const

virtual void renderLegendItem (const QwtPlot *, QPainter *, const QWidget *, const QRectF &) const

virtual void renderTitle (const QwtPlot *, QPainter *, const QRectF &) const

virtual void renderScale (const QwtPlot *, QPainter *, int axisId, int startDist, int endDist, int baseDist, const QRectF &) const

virtual void renderCanvas (const QwtPlot *, QPainter *, const QRectF &canvasRect, const QwtScaleMap *maps) const

virtual void renderLegend (const QwtPlot *, QPainter *, const QRectF &) const

Protected Member Functions

void buildCanvasMaps (const QwtPlot *, const QRectF &, QwtScaleMap maps[]) const

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

typedef QFlags<\fBDiscardFlag\fP> \fBQwtPlotRenderer::DiscardFlags\fP

Disard flags.

typedef QFlags<\fBLayoutFlag\fP> \fBQwtPlotRenderer::LayoutFlags\fP

Layout flags.

enum \fBQwtPlotRenderer::DiscardFlag\fP

Disard flags.

Enumerator:

DiscardNone

Render all components of the plot.

DiscardBackground

Don't render the background of the plot.

DiscardTitle

Don't render the title of the plot.

DiscardLegend

Don't render the legend of the plot.

DiscardCanvasBackground

Don't render the background of the canvas.

enum \fBQwtPlotRenderer::LayoutFlag\fP

Layout flags. See also:

setLayoutFlag(), testLayoutFlag()

Enumerator:

DefaultLayout

Use the default layout without margins and frames.

KeepFrames

Render all frames of the plot.

FrameWithScales

Instead of the scales a box is painted around the plot canvas, where the scale ticks are aligned to.

QwtPlotRenderer::QwtPlotRenderer (QObject *parent = \fCNULL\fP)\fC [explicit]\fP Constructor

Parameters:

parent Parent object

QwtPlotRenderer::~QwtPlotRenderer ()\fC [virtual]\fP

Destructor.

void QwtPlotRenderer::buildCanvasMaps (const \fBQwtPlot\fP *plot, const QRectF &canvasRect, \fBQwtScaleMap\fPmaps[]) const\fC [protected]\fP Calculated the scale maps for rendering the canvas

Parameters:

plot Plot widget

canvasRect Target rectangle

maps Scale maps to be calculated

\fBQwtPlotRenderer::DiscardFlags\fP QwtPlotRenderer::discardFlags () const \fBReturns:\fP

Flags, indicating what to discard from rendering

See also:

DiscardFlag, setDiscardFlags(), setDiscardFlag(), testDiscardFlag()

\fBQwtPlotRenderer::LayoutFlags\fP QwtPlotRenderer::layoutFlags () const \fBReturns:\fP

Layout flags

See also:

LayoutFlag, setLayoutFlags(), setLayoutFlag(), testLayoutFlag()

void QwtPlotRenderer::render (\fBQwtPlot\fP *plot, QPainter *painter, const QRectF &plotRect) const\fC [virtual]\fP Paint the contents of a \fBQwtPlot\fP instance into a given rectangle.

Parameters:

plot Plot to be rendered

painter Painter

plotRect Bounding rectangle

See also:

renderDocument(), renderTo(), QwtPainter::setRoundingAlignment()

void QwtPlotRenderer::renderCanvas (const \fBQwtPlot\fP *plot, QPainter *painter, const QRectF &canvasRect, const \fBQwtScaleMap\fP *map) const\fC [virtual]\fP Render the canvas into a given rectangle.

Parameters:

plot Plot widget

painter Painter

map Maps mapping between plot and paint device coordinates

canvasRect Canvas rectangle

void QwtPlotRenderer::renderDocument (\fBQwtPlot\fP *plot, const QString &fileName, const QSizeF &sizeMM, intresolution = \fC85\fP) Render a 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 QwtPlotRenderer::renderDocument (\fBQwtPlot\fP *plot, const QString &fileName, const QString &format, const QSizeF &sizeMM, intresolution = \fC85\fP) Render a plot to a file

Supported formats are:

• pdf

  Portable Document Format PDF

• ps

  Postcript

• svg

  Scalable Vector Graphics SVG

• all image formats supported by Qt

  see QImageWriter::supportedImageFormats()

Scalable vector graphic formats like PDF or SVG are superior to raster graphics formats.

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 QwtPlotRenderer::renderLegend (const \fBQwtPlot\fP *plot, QPainter *painter, const QRectF &rect) const\fC [virtual]\fP Render the legend into a given rectangle.

Parameters:

plot Plot widget

painter Painter

rect Bounding rectangle

void QwtPlotRenderer::renderLegendItem (const \fBQwtPlot\fP *plot, QPainter *painter, const QWidget *widget, const QRectF &rect) const\fC [virtual]\fP Render the legend item into a given rectangle.

Parameters:

plot Plot widget

painter Painter

widget Widget representing a legend item

rect Bounding rectangle

Note:

When widget is not derived from QwtLegendItem renderLegendItem does nothing and needs to be overloaded

void QwtPlotRenderer::renderScale (const \fBQwtPlot\fP *plot, QPainter *painter, intaxisId, intstartDist, intendDist, intbaseDist, const QRectF &rect) const\fC [virtual]\fP

Paint a scale into a given rectangle. Paint the scale into a given rectangle. Parameters:

plot Plot widget

painter Painter

axisId Axis

startDist Start border distance

endDist End border distance

baseDist Base distance

rect Bounding rectangle

void QwtPlotRenderer::renderTitle (const \fBQwtPlot\fP *plot, QPainter *painter, const QRectF &rect) const\fC [virtual]\fP Render the title into a given rectangle.

Parameters:

plot Plot widget

painter Painter

rect Bounding rectangle

void QwtPlotRenderer::renderTo (\fBQwtPlot\fP *plot, QPrinter &printer) const

Render the plot to a QPrinter. This function renders the contents of a QwtPlot 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 QwtPlotRenderer::renderTo (\fBQwtPlot\fP *plot, QPaintDevice &paintDevice) const

Render the plot to a QPaintDevice. This function renders the contents of a QwtPlot 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()

void QwtPlotRenderer::setDiscardFlag (\fBDiscardFlag\fPflag, boolon = \fCtrue\fP) Change a flag, indicating what to discard from rendering

Parameters:

flag Flag to change

on On/Off

See also:

DiscardFlag, testDiscardFlag(), setDiscardFlags(), discardFlags()

void QwtPlotRenderer::setDiscardFlags (\fBDiscardFlags\fPflags) Set the flags, indicating what to discard from rendering

Parameters:

flags Flags

See also:

DiscardFlag, setDiscardFlag(), testDiscardFlag(), discardFlags()

void QwtPlotRenderer::setLayoutFlag (\fBLayoutFlag\fPflag, boolon = \fCtrue\fP) Change a layout flag

Parameters:

flag Flag to change

on On/Off

See also:

LayoutFlag, testLayoutFlag(), setLayoutFlags(), layoutFlags()

void QwtPlotRenderer::setLayoutFlags (\fBLayoutFlags\fPflags) Set the layout flags

Parameters:

flags Flags

See also:

LayoutFlag, setLayoutFlag(), testLayoutFlag(), layoutFlags()

bool QwtPlotRenderer::testDiscardFlag (\fBDiscardFlag\fPflag) const Check if a flag is set.

Parameters:

flag Flag to be tested

See also:

DiscardFlag, setDiscardFlag(), setDiscardFlags(), discardFlags()

bool QwtPlotRenderer::testLayoutFlag (\fBLayoutFlag\fPflag) const Check if a flag is set.

Parameters:

flag Flag to be tested

See also:

LayoutFlag, setLayoutFlag(), setLayoutFlags(), layoutFlags()

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