.TH "QwtPlotSpectrogram" 3 "Mon Aug 1 2011" "Version 5.2.2" "Qwt User's Guide" \" -*- nroff -*-
.ad l
.nh
.SH NAME
QwtPlotSpectrogram \- 
.PP
A plot item, which displays a spectrogram.  

.SH SYNOPSIS
.br
.PP
.PP
\fC#include <qwt_plot_spectrogram.h>\fP
.PP
Inherits \fBQwtPlotRasterItem\fP.
.SS "Public Types"

.in +1c
.ti -1c
.RI "enum \fBCachePolicy\fP { \fBNoCache\fP, \fBPaintCache\fP, \fBScreenCache\fP }"
.br
.ti -1c
.RI "enum \fBDisplayMode\fP { \fBImageMode\fP =  1, \fBContourMode\fP =  2 }"
.br
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.RI "enum \fBItemAttribute\fP { \fBLegend\fP =  1, \fBAutoScale\fP =  2 }"
.br
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.RI "enum \fBRenderHint\fP { \fBRenderAntialiased\fP =  1 }"
.br
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.RI "enum \fBRttiValues\fP { \fBRtti_PlotItem\fP =  0, \fBRtti_PlotGrid\fP, \fBRtti_PlotScale\fP, \fBRtti_PlotMarker\fP, \fBRtti_PlotCurve\fP, \fBRtti_PlotHistogram\fP, \fBRtti_PlotSpectrogram\fP, \fBRtti_PlotSVG\fP, \fBRtti_PlotUserItem\fP =  1000 }"
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.SS "Public Member Functions"

.in +1c
.ti -1c
.RI "int \fBalpha\fP () const "
.br
.ti -1c
.RI "void \fBattach\fP (\fBQwtPlot\fP *plot)"
.br
.ti -1c
.RI "virtual QwtDoubleRect \fBboundingRect\fP () const "
.br
.ti -1c
.RI "\fBCachePolicy\fP \fBcachePolicy\fP () const "
.br
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.RI "const \fBQwtColorMap\fP & \fBcolorMap\fP () const "
.br
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.RI "QwtValueList \fBcontourLevels\fP () const "
.br
.ti -1c
.RI "virtual QPen \fBcontourPen\fP (double level) const "
.br
.ti -1c
.RI "const \fBQwtRasterData\fP & \fBdata\fP () const "
.br
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.RI "QPen \fBdefaultContourPen\fP () const "
.br
.ti -1c
.RI "void \fBdetach\fP ()"
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.ti -1c
.RI "virtual void \fBdraw\fP (QPainter *p, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRect &rect) const "
.br
.ti -1c
.RI "void \fBhide\fP ()"
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.RI "void \fBinvalidateCache\fP ()"
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.ti -1c
.RI "QwtDoubleRect \fBinvTransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QRect &) const "
.br
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.RI "bool \fBisVisible\fP () const "
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.RI "virtual void \fBitemChanged\fP ()"
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.RI "virtual QWidget * \fBlegendItem\fP () const "
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.RI "QRect \fBpaintRect\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &) const "
.br
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.RI "\fBQwtPlot\fP * \fBplot\fP () const "
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.RI "\fBQwtPlotSpectrogram\fP (const QString &title=QString::null)"
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.ti -1c
.RI "virtual QSize \fBrasterHint\fP (const QwtDoubleRect &) const "
.br
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.RI "virtual int \fBrtti\fP () const "
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.ti -1c
.RI "QwtDoubleRect \fBscaleRect\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &) const "
.br
.ti -1c
.RI "void \fBsetAlpha\fP (int alpha)"
.br
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.RI "void \fBsetAxis\fP (int xAxis, int yAxis)"
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.RI "void \fBsetCachePolicy\fP (\fBCachePolicy\fP)"
.br
.ti -1c
.RI "void \fBsetColorMap\fP (const \fBQwtColorMap\fP &)"
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.RI "void \fBsetConrecAttribute\fP (\fBQwtRasterData::ConrecAttribute\fP, bool on)"
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.ti -1c
.RI "void \fBsetContourLevels\fP (const QwtValueList &)"
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.ti -1c
.RI "void \fBsetData\fP (const \fBQwtRasterData\fP &data)"
.br
.ti -1c
.RI "void \fBsetDefaultContourPen\fP (const QPen &)"
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.RI "void \fBsetDisplayMode\fP (\fBDisplayMode\fP, bool on=true)"
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.RI "void \fBsetItemAttribute\fP (\fBItemAttribute\fP, bool on=true)"
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.RI "void \fBsetRenderHint\fP (\fBRenderHint\fP, bool on=true)"
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.RI "void \fBsetTitle\fP (const \fBQwtText\fP &title)"
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.RI "void \fBsetTitle\fP (const QString &title)"
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.RI "virtual void \fBsetVisible\fP (bool)"
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.RI "void \fBsetXAxis\fP (int axis)"
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.RI "void \fBsetYAxis\fP (int axis)"
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.RI "void \fBsetZ\fP (double z)"
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.RI "void \fBshow\fP ()"
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.RI "bool \fBtestConrecAttribute\fP (\fBQwtRasterData::ConrecAttribute\fP) const "
.br
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.RI "bool \fBtestDisplayMode\fP (\fBDisplayMode\fP) const "
.br
.ti -1c
.RI "bool \fBtestItemAttribute\fP (\fBItemAttribute\fP) const "
.br
.ti -1c
.RI "bool \fBtestRenderHint\fP (\fBRenderHint\fP) const "
.br
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.RI "const \fBQwtText\fP & \fBtitle\fP () const "
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.ti -1c
.RI "QRect \fBtransform\fP (const \fBQwtScaleMap\fP &, const \fBQwtScaleMap\fP &, const QwtDoubleRect &) const "
.br
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.RI "virtual void \fBupdateLegend\fP (\fBQwtLegend\fP *) const "
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.RI "virtual void \fBupdateScaleDiv\fP (const \fBQwtScaleDiv\fP &, const \fBQwtScaleDiv\fP &)"
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.RI "int \fBxAxis\fP () const "
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.RI "int \fByAxis\fP () const "
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.RI "double \fBz\fP () const "
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.RI "virtual \fB~QwtPlotSpectrogram\fP ()"
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.SS "Protected Member Functions"

.in +1c
.ti -1c
.RI "virtual QSize \fBcontourRasterSize\fP (const QwtDoubleRect &, const QRect &) const "
.br
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.RI "virtual void \fBdrawContourLines\fP (QPainter *p, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QwtRasterData::ContourLines &lines) const "
.br
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.RI "virtual QwtRasterData::ContourLines \fBrenderContourLines\fP (const QwtDoubleRect &rect, const QSize &raster) const "
.br
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.RI "virtual QImage \fBrenderImage\fP (const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QwtDoubleRect &rect) const "
.br
.in -1c
.SH "Detailed Description"
.PP 
A plot item, which displays a spectrogram. 

A spectrogram displays threedimenional data, where the 3rd dimension ( the intensity ) is displayed using colors. The colors are calculated from the values using a color map.
.PP
In ContourMode contour lines are painted for the contour levels.
.PP
.PP
\fBSee also:\fP
.RS 4
\fBQwtRasterData\fP, \fBQwtColorMap\fP 
.RE
.PP

.SH "Member Enumeration Documentation"
.PP 
.SS "enum \fBQwtPlotRasterItem::CachePolicy\fP\fC [inherited]\fP".IP "\(bu" 2
NoCache
.br
 \fBrenderImage()\fP is called, whenever the item has to be repainted
.IP "\(bu" 2
PaintCache
.br
 \fBrenderImage()\fP is called, whenever the image cache is not valid, or the scales, or the size of the canvas has changed. This type of cache is only useful for improving the performance of hide/show operations. All other situations are already handled by the plot canvas cache.
.IP "\(bu" 2
ScreenCache
.br
 The screen cache is an image in size of the screen. As long as the scales don't change the target image is scaled from the cache. This might improve the performance when resizing the plot widget, but suffers from scaling effects.
.PP
.PP
The default policy is NoCache 
.SS "enum \fBQwtPlotSpectrogram::DisplayMode\fP"The display mode controls how the raster data will be represented.
.IP "\(bu" 2
ImageMode
.br
 The values are mapped to colors using a color map.
.IP "\(bu" 2
ContourMode
.br
 The data is displayed using contour lines
.PP
.PP
When both modes are enabled the contour lines are painted on top of the spectrogram. The default setting enables ImageMode.
.PP
\fBSee also:\fP
.RS 4
\fBsetDisplayMode()\fP, \fBtestDisplayMode()\fP 
.RE
.PP

.SS "enum \fBQwtPlotItem::ItemAttribute\fP\fC [inherited]\fP"Plot Item Attributes
.PP
.IP "\(bu" 2
Legend
.br
 The item is represented on the legend.
.IP "\(bu" 2
AutoScale 
.br
 The \fBboundingRect()\fP of the item is included in the autoscaling calculation.
.PP
.PP
\fBSee also:\fP
.RS 4
\fBsetItemAttribute()\fP, \fBtestItemAttribute()\fP 
.RE
.PP

.SS "enum \fBQwtPlotItem::RenderHint\fP\fC [inherited]\fP"
.PP
Render hints. 
.SS "enum \fBQwtPlotItem::RttiValues\fP\fC [inherited]\fP"
.PP
Runtime type information. RttiValues is used to cast plot items, without having to enable runtime type information of the compiler. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtPlotSpectrogram::QwtPlotSpectrogram (const QString &title = \fCQString::null\fP)\fC [explicit]\fP"Sets the following item attributes:
.IP "\(bu" 2
QwtPlotItem::AutoScale: true
.IP "\(bu" 2
QwtPlotItem::Legend: false
.PP
.PP
The z value is initialized by 8.0.
.PP
\fBParameters:\fP
.RS 4
\fItitle\fP Title
.RE
.PP
\fBSee also:\fP
.RS 4
\fBQwtPlotItem::setItemAttribute()\fP, \fBQwtPlotItem::setZ()\fP 
.RE
.PP

.SS "QwtPlotSpectrogram::~QwtPlotSpectrogram ()\fC [virtual]\fP"
.PP
Destructor. 
.SH "Member Function Documentation"
.PP 
.SS "int QwtPlotRasterItem::alpha () const\fC [inherited]\fP"\fBReturns:\fP
.RS 4
Alpha value of the raster item 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetAlpha()\fP 
.RE
.PP

.SS "void QwtPlotItem::attach (\fBQwtPlot\fP *plot)\fC [inherited]\fP"
.PP
Attach the item to a plot. This method will attach a \fBQwtPlotItem\fP to the \fBQwtPlot\fP argument. It will first detach the \fBQwtPlotItem\fP from any plot from a previous call to attach (if necessary). If a NULL argument is passed, it will detach from any \fBQwtPlot\fP it was attached to.
.PP
\fBParameters:\fP
.RS 4
\fIplot\fP Plot widget 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBQwtPlotItem::detach()\fP 
.RE
.PP

.SS "QwtDoubleRect QwtPlotSpectrogram::boundingRect () const\fC [virtual]\fP"\fBReturns:\fP
.RS 4
Bounding rect of the data 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBQwtRasterData::boundingRect()\fP 
.RE
.PP

.PP
Reimplemented from \fBQwtPlotItem\fP.
.SS "\fBQwtPlotRasterItem::CachePolicy\fP QwtPlotRasterItem::cachePolicy () const\fC [inherited]\fP"\fBReturns:\fP
.RS 4
Cache policy 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBCachePolicy\fP, \fBsetCachePolicy()\fP 
.RE
.PP

.SS "const \fBQwtColorMap\fP & QwtPlotSpectrogram::colorMap () const"\fBReturns:\fP
.RS 4
Color Map used for mapping the intensity values to colors 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetColorMap()\fP 
.RE
.PP

.SS "QwtValueList QwtPlotSpectrogram::contourLevels () const"
.PP
Return the levels of the contour lines. The levels are sorted in increasing order.
.PP
\fBSee also:\fP
.RS 4
\fBcontourLevels()\fP, \fBrenderContourLines()\fP, \fBQwtRasterData::contourLines()\fP 
.RE
.PP

.SS "QPen QwtPlotSpectrogram::contourPen (doublelevel) const\fC [virtual]\fP"
.PP
Calculate the pen for a contour line. The color of the pen is the color for level calculated by the color map
.PP
\fBParameters:\fP
.RS 4
\fIlevel\fP Contour level 
.RE
.PP
\fBReturns:\fP
.RS 4
Pen for the contour line 
.RE
.PP
\fBNote:\fP
.RS 4
contourPen is only used if \fBdefaultContourPen()\fP.style() == Qt::NoPen
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetDefaultContourPen()\fP, \fBsetColorMap()\fP, \fBsetContourLevels()\fP 
.RE
.PP

.SS "QSize QwtPlotSpectrogram::contourRasterSize (const QwtDoubleRect &area, const QRect &rect) const\fC [protected, virtual]\fP"
.PP
Return the raster to be used by the CONREC contour algorithm. A larger size will improve the precisision of the CONREC algorithm, but will slow down the time that is needed to calculate the lines.
.PP
The default implementation returns rect.size() / 2 bounded to \fBdata()\fP.\fBrasterHint()\fP.
.PP
\fBParameters:\fP
.RS 4
\fIarea\fP Rect, where to calculate the contour lines 
.br
\fIrect\fP Rect in pixel coordinates, where to paint the contour lines 
.RE
.PP
\fBReturns:\fP
.RS 4
Raster to be used by the CONREC contour algorithm.
.RE
.PP
\fBNote:\fP
.RS 4
The size will be bounded to rect.size().
.RE
.PP
\fBSee also:\fP
.RS 4
\fBdrawContourLines()\fP, \fBQwtRasterData::contourLines()\fP 
.RE
.PP

.SS "const \fBQwtRasterData\fP & QwtPlotSpectrogram::data () const"\fBReturns:\fP
.RS 4
Spectrogram data 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetData()\fP 
.RE
.PP

.SS "QPen QwtPlotSpectrogram::defaultContourPen () const"\fBReturns:\fP
.RS 4
Default contour pen 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetDefaultContourPen()\fP 
.RE
.PP

.SS "void QwtPlotItem::detach ()\fC [inline, inherited]\fP"
.PP
This method detaches a \fBQwtPlotItem\fP from any \fBQwtPlot\fP it has been associated with. \fBdetach()\fP is equivalent to calling attach( NULL ) 
.PP
\fBSee also:\fP
.RS 4
\fBattach( QwtPlot* plot )\fP 
.RE
.PP

.SS "void QwtPlotSpectrogram::draw (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRect &canvasRect) const\fC [virtual]\fP"
.PP
Draw the spectrogram. \fBParameters:\fP
.RS 4
\fIpainter\fP Painter 
.br
\fIxMap\fP Maps x-values into pixel coordinates. 
.br
\fIyMap\fP Maps y-values into pixel coordinates. 
.br
\fIcanvasRect\fP Contents rect of the canvas in painter coordinates
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetDisplayMode()\fP, \fBrenderImage()\fP, \fBQwtPlotRasterItem::draw()\fP, \fBdrawContourLines()\fP 
.RE
.PP

.PP
Reimplemented from \fBQwtPlotRasterItem\fP.
.SS "void QwtPlotSpectrogram::drawContourLines (QPainter *painter, const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QwtRasterData::ContourLines &contourLines) const\fC [protected, virtual]\fP"Paint the contour lines
.PP
\fBParameters:\fP
.RS 4
\fIpainter\fP Painter 
.br
\fIxMap\fP Maps x-values into pixel coordinates. 
.br
\fIyMap\fP Maps y-values into pixel coordinates. 
.br
\fIcontourLines\fP Contour lines
.RE
.PP
\fBSee also:\fP
.RS 4
\fBrenderContourLines()\fP, \fBdefaultContourPen()\fP, \fBcontourPen()\fP 
.RE
.PP

.SS "void QwtPlotItem::hide ()\fC [inherited]\fP"
.PP
Hide the item. 
.SS "void QwtPlotRasterItem::invalidateCache ()\fC [inherited]\fP"Invalidate the paint cache 
.PP
\fBSee also:\fP
.RS 4
\fBsetCachePolicy()\fP 
.RE
.PP

.SS "QwtDoubleRect QwtPlotItem::invTransform (const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QRect &rect) const\fC [inherited]\fP"Transform a rectangle from paint to scale coordinates
.PP
\fBParameters:\fP
.RS 4
\fIxMap\fP X map 
.br
\fIyMap\fP Y map 
.br
\fIrect\fP Rectangle in paint coordinates 
.RE
.PP
\fBReturns:\fP
.RS 4
Rectangle in scale coordinates 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBtransform()\fP 
.RE
.PP

.SS "bool QwtPlotItem::isVisible () const\fC [inherited]\fP"\fBReturns:\fP
.RS 4
true if visible 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetVisible()\fP, \fBshow()\fP, \fBhide()\fP 
.RE
.PP

.SS "void QwtPlotItem::itemChanged ()\fC [virtual, inherited]\fP"Update the legend and call \fBQwtPlot::autoRefresh\fP for the parent plot.
.PP
\fBSee also:\fP
.RS 4
\fBupdateLegend()\fP 
.RE
.PP

.SS "QWidget * QwtPlotItem::legendItem () const\fC [virtual, inherited]\fP"
.PP
Allocate the widget that represents the item on the legend. The default implementation is made for \fBQwtPlotCurve\fP and returns a QwtLegendItem(), but an item could be represented by any type of widget, by overloading \fBlegendItem()\fP and \fBupdateLegend()\fP.
.PP
\fBReturns:\fP
.RS 4
QwtLegendItem() 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBupdateLegend()\fP QwtLegend() 
.RE
.PP

.PP
Implements \fBQwtLegendItemManager\fP.
.SS "QRect QwtPlotItem::paintRect (const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap) const\fC [inherited]\fP"
.PP
Calculate the bounding paint rect of 2 maps. \fBParameters:\fP
.RS 4
\fIxMap\fP X map 
.br
\fIyMap\fP X map
.RE
.PP
\fBReturns:\fP
.RS 4
Bounding rect of the scale maps 
.RE
.PP

.SS "\fBQwtPlot\fP * QwtPlotItem::plot () const\fC [inherited]\fP"
.PP
Return attached plot. 
.SS "QSize QwtPlotSpectrogram::rasterHint (const QwtDoubleRect &rect) const\fC [virtual]\fP"
.PP
Returns the recommended raster for a given rect. F.e the raster hint is used to limit the resolution of the image that is rendered.
.PP
\fBParameters:\fP
.RS 4
\fIrect\fP Rect for the raster hint 
.RE
.PP
\fBReturns:\fP
.RS 4
\fBdata()\fP.rasterHint(rect) 
.RE
.PP

.PP
Reimplemented from \fBQwtPlotRasterItem\fP.
.SS "QwtRasterData::ContourLines QwtPlotSpectrogram::renderContourLines (const QwtDoubleRect &rect, const QSize &raster) const\fC [protected, virtual]\fP"Calculate contour lines
.PP
\fBParameters:\fP
.RS 4
\fIrect\fP Rectangle, where to calculate the contour lines 
.br
\fIraster\fP Raster, used by the CONREC algorithm
.RE
.PP
\fBSee also:\fP
.RS 4
\fBcontourLevels()\fP, \fBsetConrecAttribute()\fP, \fBQwtRasterData::contourLines()\fP 
.RE
.PP

.SS "QImage QwtPlotSpectrogram::renderImage (const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QwtDoubleRect &area) const\fC [protected, virtual]\fP"
.PP
Render an image from the data and color map. The area is translated into a rect of the paint device. For each pixel of this rect the intensity is mapped into a color.
.PP
\fBParameters:\fP
.RS 4
\fIxMap\fP X-Scale Map 
.br
\fIyMap\fP Y-Scale Map 
.br
\fIarea\fP Area that should be rendered in scale coordinates.
.RE
.PP
\fBReturns:\fP
.RS 4
A QImage::Format_Indexed8 or QImage::Format_ARGB32 depending on the color map.
.RE
.PP
\fBSee also:\fP
.RS 4
QwtRasterData::intensity(), \fBQwtColorMap::rgb()\fP, \fBQwtColorMap::colorIndex()\fP 
.RE
.PP

.PP
Implements \fBQwtPlotRasterItem\fP.
.SS "int QwtPlotSpectrogram::rtti () const\fC [virtual]\fP"\fBReturns:\fP
.RS 4
QwtPlotItem::Rtti_PlotSpectrogram 
.RE
.PP

.PP
Reimplemented from \fBQwtPlotItem\fP.
.SS "QwtDoubleRect QwtPlotItem::scaleRect (const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap) const\fC [inherited]\fP"
.PP
Calculate the bounding scale rect of 2 maps. \fBParameters:\fP
.RS 4
\fIxMap\fP X map 
.br
\fIyMap\fP X map
.RE
.PP
\fBReturns:\fP
.RS 4
Bounding rect of the scale maps 
.RE
.PP

.SS "void QwtPlotRasterItem::setAlpha (intalpha)\fC [inherited]\fP"
.PP
Set an alpha value for the raster data. Often a plot has several types of raster data organized in layers. ( f.e a geographical map, with weather statistics ). Using \fBsetAlpha()\fP raster items can be stacked easily.
.PP
The alpha value is a value [0, 255] to control the transparency of the image. 0 represents a fully transparent color, while 255 represents a fully opaque color.
.PP
\fBParameters:\fP
.RS 4
\fIalpha\fP Alpha value
.RE
.PP
.IP "\(bu" 2
alpha >= 0
.br
 All alpha values of the pixels returned by \fBrenderImage()\fP will be set to alpha, beside those with an alpha value of 0 (invalid pixels).
.IP "\(bu" 2
alpha < 0 The alpha values returned by \fBrenderImage()\fP are not changed.
.PP
.PP
The default alpha value is \-1.
.PP
\fBSee also:\fP
.RS 4
\fBalpha()\fP 
.RE
.PP

.SS "void QwtPlotItem::setAxis (intxAxis, intyAxis)\fC [inherited]\fP"Set X and Y axis
.PP
The item will painted according to the coordinates its Axes.
.PP
\fBParameters:\fP
.RS 4
\fIxAxis\fP X Axis 
.br
\fIyAxis\fP Y Axis
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetXAxis()\fP, \fBsetYAxis()\fP, \fBxAxis()\fP, \fByAxis()\fP 
.RE
.PP

.SS "void QwtPlotRasterItem::setCachePolicy (\fBQwtPlotRasterItem::CachePolicy\fPpolicy)\fC [inherited]\fP"Change the cache policy
.PP
The default policy is NoCache
.PP
\fBParameters:\fP
.RS 4
\fIpolicy\fP Cache policy 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBCachePolicy\fP, \fBcachePolicy()\fP 
.RE
.PP

.SS "void QwtPlotSpectrogram::setColorMap (const \fBQwtColorMap\fP &colorMap)"Change the color map
.PP
Often it is useful to display the mapping between intensities and colors as an additional plot axis, showing a color bar.
.PP
\fBParameters:\fP
.RS 4
\fIcolorMap\fP Color Map
.RE
.PP
\fBSee also:\fP
.RS 4
\fBcolorMap()\fP, QwtScaleWidget::setColorBarEnabled(), QwtScaleWidget::setColorMap() 
.RE
.PP

.SS "void QwtPlotSpectrogram::setConrecAttribute (\fBQwtRasterData::ConrecAttribute\fPattribute, boolon)"Modify an attribute of the CONREC algorithm, used to calculate the contour lines.
.PP
\fBParameters:\fP
.RS 4
\fIattribute\fP CONREC attribute 
.br
\fIon\fP On/Off
.RE
.PP
\fBSee also:\fP
.RS 4
\fBtestConrecAttribute()\fP, \fBrenderContourLines()\fP, \fBQwtRasterData::contourLines()\fP 
.RE
.PP

.SS "void QwtPlotSpectrogram::setContourLevels (const QwtValueList &levels)"Set the levels of the contour lines
.PP
\fBParameters:\fP
.RS 4
\fIlevels\fP Values of the contour levels 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBcontourLevels()\fP, \fBrenderContourLines()\fP, \fBQwtRasterData::contourLines()\fP
.RE
.PP
\fBNote:\fP
.RS 4
contourLevels returns the same levels but sorted. 
.RE
.PP

.SS "void QwtPlotSpectrogram::setData (const \fBQwtRasterData\fP &data)"Set the data to be displayed
.PP
\fBParameters:\fP
.RS 4
\fIdata\fP Spectrogram Data 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBdata()\fP 
.RE
.PP

.SS "void QwtPlotSpectrogram::setDefaultContourPen (const QPen &pen)"
.PP
Set the default pen for the contour lines. If the spectrogram has a valid default contour pen a contour line is painted using the default contour pen. Otherwise (pen.style() == Qt::NoPen) the pen is calculated for each contour level using \fBcontourPen()\fP.
.PP
\fBSee also:\fP
.RS 4
\fBdefaultContourPen()\fP, \fBcontourPen()\fP 
.RE
.PP

.SS "void QwtPlotSpectrogram::setDisplayMode (\fBDisplayMode\fPmode, boolon = \fCtrue\fP)"The display mode controls how the raster data will be represented.
.PP
\fBParameters:\fP
.RS 4
\fImode\fP Display mode 
.br
\fIon\fP On/Off
.RE
.PP
The default setting enables ImageMode.
.PP
\fBSee also:\fP
.RS 4
\fBDisplayMode\fP, displayMode() 
.RE
.PP

.SS "void QwtPlotItem::setItemAttribute (\fBItemAttribute\fPattribute, boolon = \fCtrue\fP)\fC [inherited]\fP"Toggle an item attribute
.PP
\fBParameters:\fP
.RS 4
\fIattribute\fP Attribute type 
.br
\fIon\fP true/false
.RE
.PP
\fBSee also:\fP
.RS 4
\fBtestItemAttribute()\fP, \fBItemAttribute\fP 
.RE
.PP

.SS "void QwtPlotItem::setRenderHint (\fBRenderHint\fPhint, boolon = \fCtrue\fP)\fC [inherited]\fP"Toggle an render hint
.PP
\fBParameters:\fP
.RS 4
\fIhint\fP Render hint 
.br
\fIon\fP true/false
.RE
.PP
\fBSee also:\fP
.RS 4
\fBtestRenderHint()\fP, \fBRenderHint\fP 
.RE
.PP

.SS "void QwtPlotItem::setTitle (const \fBQwtText\fP &title)\fC [inherited]\fP"Set a new title
.PP
\fBParameters:\fP
.RS 4
\fItitle\fP Title 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBtitle()\fP 
.RE
.PP

.SS "void QwtPlotItem::setTitle (const QString &title)\fC [inherited]\fP"Set a new title
.PP
\fBParameters:\fP
.RS 4
\fItitle\fP Title 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBtitle()\fP 
.RE
.PP

.SS "void QwtPlotItem::setVisible (boolon)\fC [virtual, inherited]\fP"Show/Hide the item
.PP
\fBParameters:\fP
.RS 4
\fIon\fP Show if true, otherwise hide 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBisVisible()\fP, \fBshow()\fP, \fBhide()\fP 
.RE
.PP

.SS "void QwtPlotItem::setXAxis (intaxis)\fC [inherited]\fP"Set the X axis
.PP
The item will painted according to the coordinates its Axes.
.PP
\fBParameters:\fP
.RS 4
\fIaxis\fP X Axis 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetAxis()\fP, \fBsetYAxis()\fP, \fBxAxis()\fP 
.RE
.PP

.SS "void QwtPlotItem::setYAxis (intaxis)\fC [inherited]\fP"Set the Y axis
.PP
The item will painted according to the coordinates its Axes.
.PP
\fBParameters:\fP
.RS 4
\fIaxis\fP Y Axis 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetAxis()\fP, \fBsetXAxis()\fP, \fByAxis()\fP 
.RE
.PP

.SS "void QwtPlotItem::setZ (doublez)\fC [inherited]\fP"
.PP
Set the z value. Plot items are painted in increasing z-order.
.PP
\fBParameters:\fP
.RS 4
\fIz\fP Z-value 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBz()\fP, \fBQwtPlotDict::itemList()\fP 
.RE
.PP

.SS "void QwtPlotItem::show ()\fC [inherited]\fP"
.PP
Show the item. 
.SS "bool QwtPlotSpectrogram::testConrecAttribute (\fBQwtRasterData::ConrecAttribute\fPattribute) const"Test an attribute of the CONREC algorithm, used to calculate the contour lines.
.PP
\fBParameters:\fP
.RS 4
\fIattribute\fP CONREC attribute 
.RE
.PP
\fBReturns:\fP
.RS 4
true, is enabled
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetConrecAttribute()\fP, \fBrenderContourLines()\fP, \fBQwtRasterData::contourLines()\fP 
.RE
.PP

.SS "bool QwtPlotSpectrogram::testDisplayMode (\fBDisplayMode\fPmode) const"The display mode controls how the raster data will be represented.
.PP
\fBParameters:\fP
.RS 4
\fImode\fP Display mode 
.RE
.PP
\fBReturns:\fP
.RS 4
true if mode is enabled 
.RE
.PP

.SS "bool QwtPlotItem::testItemAttribute (\fBItemAttribute\fPattribute) const\fC [inherited]\fP"Test an item attribute
.PP
\fBParameters:\fP
.RS 4
\fIattribute\fP Attribute type 
.RE
.PP
\fBReturns:\fP
.RS 4
true/false 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetItemAttribute()\fP, \fBItemAttribute\fP 
.RE
.PP

.SS "bool QwtPlotItem::testRenderHint (\fBRenderHint\fPhint) const\fC [inherited]\fP"Test a render hint
.PP
\fBParameters:\fP
.RS 4
\fIhint\fP Render hint 
.RE
.PP
\fBReturns:\fP
.RS 4
true/false 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetRenderHint()\fP, \fBRenderHint\fP 
.RE
.PP

.SS "const \fBQwtText\fP & QwtPlotItem::title () const\fC [inherited]\fP"\fBReturns:\fP
.RS 4
Title of the item 
.RE
.PP
\fBSee also:\fP
.RS 4
\fBsetTitle()\fP 
.RE
.PP

.SS "QRect QwtPlotItem::transform (const \fBQwtScaleMap\fP &xMap, const \fBQwtScaleMap\fP &yMap, const QwtDoubleRect &rect) const\fC [inherited]\fP"Transform a rectangle
.PP
\fBParameters:\fP
.RS 4
\fIxMap\fP X map 
.br
\fIyMap\fP Y map 
.br
\fIrect\fP Rectangle in scale coordinates 
.RE
.PP
\fBReturns:\fP
.RS 4
Rectangle in paint coordinates
.RE
.PP
\fBSee also:\fP
.RS 4
\fBinvTransform()\fP 
.RE
.PP

.SS "void QwtPlotItem::updateLegend (\fBQwtLegend\fP *legend) const\fC [virtual, inherited]\fP"
.PP
Update the widget that represents the item on the legend. \fBupdateLegend()\fP is called from \fBitemChanged()\fP to adopt the widget representing the item on the legend to its new configuration.
.PP
The default implementation is made for \fBQwtPlotCurve\fP and updates a QwtLegendItem(), but an item could be represented by any type of widget, by overloading \fBlegendItem()\fP and \fBupdateLegend()\fP.
.PP
\fBParameters:\fP
.RS 4
\fIlegend\fP Legend
.RE
.PP
\fBSee also:\fP
.RS 4
\fBlegendItem()\fP, \fBitemChanged()\fP, QwtLegend() 
.RE
.PP

.PP
Implements \fBQwtLegendItemManager\fP.
.PP
Reimplemented in \fBQwtPlotCurve\fP.
.SS "void QwtPlotItem::updateScaleDiv (const \fBQwtScaleDiv\fP &, const \fBQwtScaleDiv\fP &)\fC [virtual, inherited]\fP"
.PP
Update the item to changes of the axes scale division. Update the item, when the axes of plot have changed. The default implementation does nothing, but items that depend on the scale division (like QwtPlotGrid()) have to reimplement \fBupdateScaleDiv()\fP
.PP
\fBParameters:\fP
.RS 4
\fIxScaleDiv\fP Scale division of the x-axis 
.br
\fIyScaleDiv\fP Scale division of the y-axis
.RE
.PP
\fBSee also:\fP
.RS 4
\fBQwtPlot::updateAxes()\fP 
.RE
.PP

.PP
Reimplemented in \fBQwtPlotGrid\fP, and \fBQwtPlotScaleItem\fP.
.SS "int QwtPlotItem::xAxis () const\fC [inherited]\fP"
.PP
Return xAxis. 
.SS "int QwtPlotItem::yAxis () const\fC [inherited]\fP"
.PP
Return yAxis. 
.SS "double QwtPlotItem::z () const\fC [inherited]\fP"Plot items are painted in increasing z-order.
.PP
\fBReturns:\fP
.RS 4
\fBsetZ()\fP, \fBQwtPlotDict::itemList()\fP 
.RE
.PP


.SH "Author"
.PP 
Generated automatically by Doxygen for Qwt User's Guide from the source code.