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QwtPlotSpectrogram
Langue: en
Version: 383627 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
Sommaire
- NAME
- SYNOPSIS
- Detailed Description
- Member Enumeration Documentation
- Constructor & Destructor Documentation
- Member Function Documentation
- QwtDoubleRect QwtPlotSpectrogram::boundingRect () const [virtual]Returns:
- const QwtColorMap & QwtPlotSpectrogram::colorMap () constReturns:
- QwtValueList QwtPlotSpectrogram::contourLevels () const
- QPen QwtPlotSpectrogram::contourPen (double level) const [virtual]
- QSize QwtPlotSpectrogram::contourRasterSize (const QwtDoubleRect & area, const QRect & rect) const [protected, virtual]
- const QwtRasterData & QwtPlotSpectrogram::data () constReturns:
- QPen QwtPlotSpectrogram::defaultContourPen () constReturns:
- void QwtPlotSpectrogram::draw (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRect & canvasRect) const [virtual]
- void QwtPlotSpectrogram::drawContourLines (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QwtRasterData::ContourLines & contourLines) const [protected, virtual]Paint the contour lines
- QSize QwtPlotSpectrogram::rasterHint (const QwtDoubleRect & rect) const [virtual]
- QwtRasterData::ContourLines QwtPlotSpectrogram::renderContourLines (const QwtDoubleRect & rect, const QSize & raster) const [protected, virtual]Calculate contour lines
- QImage QwtPlotSpectrogram::renderImage (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QwtDoubleRect & area) const [protected, virtual]
- int QwtPlotSpectrogram::rtti () const [virtual]Returns:
- void QwtPlotSpectrogram::setColorMap (const QwtColorMap & colorMap)Change the color map
- void QwtPlotSpectrogram::setConrecAttribute (QwtRasterData::ConrecAttribute attribute, bool on)Modify an attribute of the CONREC algorithm, used to calculate the contour lines.
- void QwtPlotSpectrogram::setContourLevels (const QwtValueList & levels)Set the levels of the contour lines
- void QwtPlotSpectrogram::setData (const QwtRasterData & data)Set the data to be displayed
- void QwtPlotSpectrogram::setDefaultContourPen (const QPen & pen)
- void QwtPlotSpectrogram::setDisplayMode (DisplayMode mode, bool on = true)The display mode controls how the raster data will be represented.
- bool QwtPlotSpectrogram::testConrecAttribute (QwtRasterData::ConrecAttribute attribute) constTest an attribute of the CONREC algorithm, used to calculate the contour lines.
- bool QwtPlotSpectrogram::testDisplayMode (DisplayMode mode) constThe display mode controls how the raster data will be represented.
- Author
NAME
QwtPlotSpectrogram -A plot item, which displays a spectrogram.
SYNOPSIS
#include <qwt_plot_spectrogram.h>
Inherits QwtPlotRasterItem.
Public Types
enum DisplayMode { ImageMode = 1, ContourMode = 2 }
Public Member Functions
QwtPlotSpectrogram (const QString &title=QString::null)
virtual ~QwtPlotSpectrogram ()
void setDisplayMode (DisplayMode, bool on=true)
bool testDisplayMode (DisplayMode) const
void setData (const QwtRasterData &data)
const QwtRasterData & data () const
void setColorMap (const QwtColorMap &)
const QwtColorMap & colorMap () const
virtual QwtDoubleRect boundingRect () const
virtual QSize rasterHint (const QwtDoubleRect &) const
void setDefaultContourPen (const QPen &)
QPen defaultContourPen () const
virtual QPen contourPen (double level) const
void setConrecAttribute (QwtRasterData::ConrecAttribute, bool on)
bool testConrecAttribute (QwtRasterData::ConrecAttribute) const
void setContourLevels (const QwtValueList &)
QwtValueList contourLevels () const
virtual int rtti () const
virtual void draw (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &rect) const
Protected Member Functions
virtual QImage renderImage (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QwtDoubleRect &rect) const
virtual QSize contourRasterSize (const QwtDoubleRect &, const QRect &) const
virtual QwtRasterData::ContourLines renderContourLines (const QwtDoubleRect &rect, const QSize &raster) const
virtual void drawContourLines (QPainter *p, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QwtRasterData::ContourLines &lines) const
Detailed Description
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.
In ContourMode contour lines are painted for the contour levels.
See also:
- QwtRasterData, QwtColorMap
Member Enumeration Documentation
enum QwtPlotSpectrogram::DisplayModeThe display mode controls how the raster data will be represented.
- *
- ImageMode
The values are mapped to colors using a color map. - *
- ContourMode
The data is displayed using contour lines
When both modes are enabled the contour lines are painted on top of the spectrogram. The default setting enables ImageMode.
See also:
- setDisplayMode(), testDisplayMode()
Constructor & Destructor Documentation
QwtPlotSpectrogram::QwtPlotSpectrogram (const QString & title = QString::null) [explicit]Sets the following item attributes:
- *
- QwtPlotItem::AutoScale: true
- *
- QwtPlotItem::Legend: false
The z value is initialized by 8.0.
Parameters:
- title Title
See also:
- QwtPlotItem::setItemAttribute(), QwtPlotItem::setZ()
QwtPlotSpectrogram::~QwtPlotSpectrogram () [virtual]
Destructor.
Member Function Documentation
QwtDoubleRect QwtPlotSpectrogram::boundingRect () const [virtual]Returns:
- Bounding rect of the data
See also:
- QwtRasterData::boundingRect()
Reimplemented from QwtPlotItem.
const QwtColorMap & QwtPlotSpectrogram::colorMap () constReturns:
- Color Map used for mapping the intensity values to colors
See also:
- setColorMap()
QwtValueList QwtPlotSpectrogram::contourLevels () const
Return the levels of the contour lines. The levels are sorted in increasing order.
See also:
- contourLevels(), renderContourLines(), QwtRasterData::contourLines()
QPen QwtPlotSpectrogram::contourPen (double level) const [virtual]
Calculate the pen for a contour line. The color of the pen is the color for level calculated by the color map
Parameters:
- level Contour level
Returns:
- Pen for the contour line
Note:
- contourPen is only used if defaultContourPen().style() == Qt::NoPen
See also:
- setDefaultContourPen(), setColorMap(), setContourLevels()
QSize QwtPlotSpectrogram::contourRasterSize (const QwtDoubleRect & area, const QRect & rect) const [protected, virtual]
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.
The default implementation returns rect.size() / 2 bounded to data().rasterHint().
Parameters:
- area Rect, where to calculate the contour lines
rect Rect in pixel coordinates, where to paint the contour lines
Returns:
- Raster to be used by the CONREC contour algorithm.
Note:
- The size will be bounded to rect.size().
See also:
- drawContourLines(), QwtRasterData::contourLines()
const QwtRasterData & QwtPlotSpectrogram::data () constReturns:
- Spectrogram data
See also:
- setData()
QPen QwtPlotSpectrogram::defaultContourPen () constReturns:
- Default contour pen
See also:
- setDefaultContourPen()
void QwtPlotSpectrogram::draw (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QRect & canvasRect) const [virtual]
Draw the spectrogram. Parameters:
- painter Painter
xMap Maps x-values into pixel coordinates.
yMap Maps y-values into pixel coordinates.
canvasRect Contents rect of the canvas in painter coordinates
See also:
- setDisplayMode(), renderImage(), QwtPlotRasterItem::draw(), drawContourLines()
Reimplemented from QwtPlotRasterItem.
void QwtPlotSpectrogram::drawContourLines (QPainter * painter, const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QwtRasterData::ContourLines & contourLines) const [protected, virtual]Paint the contour lines
Parameters:
- painter Painter
xMap Maps x-values into pixel coordinates.
yMap Maps y-values into pixel coordinates.
contourLines Contour lines
See also:
- renderContourLines(), defaultContourPen(), contourPen()
QSize QwtPlotSpectrogram::rasterHint (const QwtDoubleRect & rect) const [virtual]
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.
Parameters:
- rect Rect for the raster hint
Returns:
- data().rasterHint(rect)
Reimplemented from QwtPlotRasterItem.
QwtRasterData::ContourLines QwtPlotSpectrogram::renderContourLines (const QwtDoubleRect & rect, const QSize & raster) const [protected, virtual]Calculate contour lines
Parameters:
- rect Rectangle, where to calculate the contour lines
raster Raster, used by the CONREC algorithm
See also:
- contourLevels(), setConrecAttribute(), QwtRasterData::contourLines()
QImage QwtPlotSpectrogram::renderImage (const QwtScaleMap & xMap, const QwtScaleMap & yMap, const QwtDoubleRect & area) const [protected, virtual]
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.
Parameters:
- xMap X-Scale Map
yMap Y-Scale Map
area Area that should be rendered in scale coordinates.
Returns:
- A QImage::Format_Indexed8 or QImage::Format_ARGB32 depending on the color map.
See also:
- QwtRasterData::intensity(), QwtColorMap::rgb(), QwtColorMap::colorIndex()
Implements QwtPlotRasterItem.
int QwtPlotSpectrogram::rtti () const [virtual]Returns:
- QwtPlotItem::Rtti_PlotSpectrogram
Reimplemented from QwtPlotItem.
void QwtPlotSpectrogram::setColorMap (const QwtColorMap & colorMap)Change the color map
Often it is useful to display the mapping between intensities and colors as an additional plot axis, showing a color bar.
Parameters:
- colorMap Color Map
See also:
- colorMap(), QwtScaleWidget::setColorBarEnabled(), QwtScaleWidget::setColorMap()
void QwtPlotSpectrogram::setConrecAttribute (QwtRasterData::ConrecAttribute attribute, bool on)Modify an attribute of the CONREC algorithm, used to calculate the contour lines.
Parameters:
- attribute CONREC attribute
on On/Off
See also:
- testConrecAttribute(), renderContourLines(), QwtRasterData::contourLines()
void QwtPlotSpectrogram::setContourLevels (const QwtValueList & levels)Set the levels of the contour lines
Parameters:
- levels Values of the contour levels
See also:
- contourLevels(), renderContourLines(), QwtRasterData::contourLines()
Note:
- contourLevels returns the same levels but sorted.
void QwtPlotSpectrogram::setData (const QwtRasterData & data)Set the data to be displayed
Parameters:
- data Spectrogram Data
See also:
- data()
void QwtPlotSpectrogram::setDefaultContourPen (const QPen & pen)
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 contourPen().
See also:
- defaultContourPen(), contourPen()
void QwtPlotSpectrogram::setDisplayMode (DisplayMode mode, bool on = true)The display mode controls how the raster data will be represented.
Parameters:
- mode Display mode
on On/Off
The default setting enables ImageMode.
See also:
- DisplayMode, displayMode()
bool QwtPlotSpectrogram::testConrecAttribute (QwtRasterData::ConrecAttribute attribute) constTest an attribute of the CONREC algorithm, used to calculate the contour lines.
Parameters:
- attribute CONREC attribute
Returns:
- true, is enabled
See also:
- setConrecAttribute(), renderContourLines(), QwtRasterData::contourLines()
bool QwtPlotSpectrogram::testDisplayMode (DisplayMode mode) constThe display mode controls how the raster data will be represented.
Parameters:
- mode Display mode
Returns:
- true if mode is enabled
Author
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