显示频谱图的绘图项更多...

#include <qwt_plot_spectrogram.h>

类 QwtPlotSpectrogram 继承关系图:

类
class	PrivateData

Public 类型
enum	DisplayMode { ImageMode = 0x01 , ContourMode = 0x02 }
	显示模式更多...

Public 类型继承自 QwtPlotRasterItem
enum	CachePolicy { NoCache , PaintCache }
	缓存策略更多...

enum	PaintAttribute { PaintInDeviceResolution = 1 }
	绘制属性更多...

Public 类型继承自 QwtPlotItem
enum	RttiValues { Rtti_PlotItem = 0 , Rtti_PlotGrid , Rtti_PlotScale , Rtti_PlotLegend , Rtti_PlotMarker , Rtti_PlotCurve , Rtti_PlotSpectroCurve , Rtti_PlotIntervalCurve , Rtti_PlotHistogram , Rtti_PlotSpectrogram , Rtti_PlotGraphic , Rtti_PlotTradingCurve , Rtti_PlotBarChart , Rtti_PlotMultiBarChart , Rtti_PlotShape , Rtti_PlotTextLabel , Rtti_PlotZone , Rtti_PlotVectorField , Rtti_PlotArrowMarker , Rtti_PlotBoxChart , Rtti_PlotUserItem = 1000 }
	运行时类型信息更多...

enum	ItemAttribute { Legend = 0x01 , AutoScale = 0x02 , Margins = 0x04 }
	绘图项属性更多...

enum	ItemInterest { ScaleInterest = 0x01 , LegendInterest = 0x02 }
	绘图项关注的事件类型更多...

enum	RenderHint { RenderAntialiased = 0x1 }
	渲染提示更多...

Public 成员函数
	QwtPlotSpectrogram (const QString &title=QString())
	构造函数

virtual	~QwtPlotSpectrogram ()
	析构函数

void	setDisplayMode (DisplayMode, bool on=true)
	设置显示模式

bool	testDisplayMode (DisplayMode) const
	测试显示模式

void	setData (QwtRasterData *data)
	设置要显示的数据

const QwtRasterData *	data () const
	获取频谱图数据（常量版本）

QwtRasterData *	data ()
	获取频谱图数据

void	setColorMap (QwtColorMap *)
	更改颜色映射

const QwtColorMap *	colorMap () const
	获取用于将强度值映射到颜色的颜色映射

void	setColorTableSize (int numColors)
	限制颜色映射使用的颜色数量

int	colorTableSize () const
	获取颜色表大小

virtual QwtInterval	interval (Qt::Axis) const override
	获取轴的边界区间

virtual QRectF	pixelHint (const QRectF &) const override
	获取像素提示

void	setDefaultContourPen (const QColor &, qreal width=0.0, Qt::PenStyle=Qt::SolidLine)
	构建并分配等高线的默认画笔

void	setDefaultContourPen (const QPen &)
	设置等高线的默认画笔

QPen	defaultContourPen () const
	获取默认等高线画笔

virtual QPen	contourPen (double level) const
	计算等高线的画笔

void	setConrecFlag (QwtRasterData::ConrecFlag, bool on)
	修改 CONREC 算法的属性

bool	testConrecFlag (QwtRasterData::ConrecFlag) const
	测试 CONREC 算法的属性

void	setContourLevels (const QList< double > &)
	设置等高线的级别

QList< double >	contourLevels () const
	获取等高线的级别

virtual int	rtti () const override
	获取运行时类型信息

virtual void	draw (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect) const override
	绘制频谱图

Public 成员函数继承自 QwtPlotRasterItem
	QwtPlotRasterItem (const QString &title=QString())
	构造函数

	QwtPlotRasterItem (const QwtText &title)
	构造函数（带标题）

virtual	~QwtPlotRasterItem ()
	析构函数

void	setPaintAttribute (PaintAttribute, bool on=true)
	设置绘制属性

bool	testPaintAttribute (PaintAttribute) const
	测试绘制属性

void	setAlpha (int alpha)
	设置栅格数据的 alpha 值

int	alpha () const
	获取栅格项的 alpha 值

void	setCachePolicy (CachePolicy)
	更改缓存策略

CachePolicy	cachePolicy () const
	获取缓存策略

void	invalidateCache ()
	使绘制缓存失效

virtual QRectF	boundingRect () const override
	获取数据的边界矩形

Public 成员函数继承自 QwtPlotItem
	QwtPlotItem ()
	Default constructor

	QwtPlotItem (const QString &title)
	Constructor with title as QString

	QwtPlotItem (const QwtText &title)
	Constructor with title as QwtText

virtual	~QwtPlotItem ()
	Destructor

void	attach (QwtPlot *plot)
	Attach the item to a plot

void	detach ()
	Detach the item from the plot

QwtPlot *	plot () const
	Get the plot the item is attached to

void	setTitle (const QString &title)
	Set the title using a QString

void	setTitle (const QwtText &title)
	Set the title using a QwtText

const QwtText &	title () const
	Get the title

void	setItemAttribute (ItemAttribute, bool on=true)
	Set an item attribute

bool	testItemAttribute (ItemAttribute) const
	Test an item attribute

void	setItemInterest (ItemInterest, bool on=true)
	Set an item interest

bool	testItemInterest (ItemInterest) const
	Test an item interest

void	setRenderHint (RenderHint, bool on=true)
	Set a render hint

bool	testRenderHint (RenderHint) const
	Test a render hint

void	setRenderThreadCount (uint numThreads)
	Set the number of render threads

uint	renderThreadCount () const
	Get the number of render threads

void	setLegendIconSize (const QSize &)
	Set the legend icon size

QSize	legendIconSize () const
	Get the legend icon size

double	z () const
	Get the z-value

void	setZ (double z)
	Set the z-value

void	show ()
	Show the item

void	hide ()
	Hide the item

virtual void	setVisible (bool)
	Set the visibility

bool	isVisible () const
	Check if the item is visible

void	setAxes (QwtAxisId xAxis, QwtAxisId yAxis)
	Set both axes

void	setXAxis (QwtAxisId)
	Set the x-axis

QwtAxisId	xAxis () const
	Get the x-axis

void	setYAxis (QwtAxisId)
	Set the y-axis

QwtAxisId	yAxis () const
	Get the y-axis

virtual void	itemChanged ()
	Notify the plot that the item has changed

virtual void	legendChanged ()
	Notify the item that the legend has changed

virtual void	getCanvasMarginHint (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &canvasRect, double &left, double &top, double &right, double &bottom) const
	Get margin hints for the canvas

virtual void	updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)
	Update the item with new scale divisions

virtual void	updateLegend (const QwtPlotItem *, const QList< QwtLegendData > &)
	Update the item with changes of the legend

QRectF	scaleRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the scale rectangle

QRectF	paintRect (const QwtScaleMap &, const QwtScaleMap &) const
	Calculate the paint rectangle

virtual QList< QwtLegendData >	legendData () const
	Return legend data

virtual QwtGraphic	legendIcon (int index, const QSizeF &) const
	Return a legend icon

Protected 成员函数
virtual QImage	renderImage (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRectF &area, const QSize &imageSize) const override
	Render an image from data and color map.

virtual QSize	contourRasterSize (const QRectF &, const QRect &) const
	Return the raster to be used by the CONREC contour algorithm.

virtual QwtRasterData::ContourLines	renderContourLines (const QRectF &rect, const QSize &raster) const
	Calculate contour lines

virtual void	drawContourLines (QPainter *, const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QwtRasterData::ContourLines &) const
	Paint the contour lines

void	renderTile (const QwtScaleMap &xMap, const QwtScaleMap &yMap, const QRect &tile, QImage *) const
	Render a tile of an image.

Protected 成员函数继承自 QwtPlotRasterItem
virtual QwtScaleMap	imageMap (Qt::Orientation, const QwtScaleMap &map, const QRectF &area, const QSize &imageSize, double pixelSize) const
	Get the image map

Protected 成员函数继承自 QwtPlotItem
QwtGraphic	defaultIcon (const QBrush &, const QSizeF &) const
	Create a default icon

详细描述

显示频谱图的绘图项

成员枚举类型说明

◆ DisplayMode

enum QwtPlotSpectrogram::DisplayMode

显示模式

枚举值
ImageMode	The values are mapped to colors using a color map.
ContourMode	The data is displayed using contour lines

构造及析构函数说明

◆ QwtPlotSpectrogram()

QwtPlotSpectrogram::QwtPlotSpectrogram ( const QString & title = QString() )

explicit

构造函数

◆ ~QwtPlotSpectrogram()

QwtPlotSpectrogram::~QwtPlotSpectrogram ( )

virtual

析构函数

成员函数说明

◆ colorMap()

const QwtColorMap * QwtPlotSpectrogram::colorMap ( ) const

获取用于将强度值映射到颜色的颜色映射

◆ colorTableSize()

int QwtPlotSpectrogram::colorTableSize ( ) const

获取颜色表大小

◆ contourLevels()

QList< double > QwtPlotSpectrogram::contourLevels ( ) const

获取等高线的级别

◆ contourPen()

QPen QwtPlotSpectrogram::contourPen ( double level ) const

virtual

计算等高线的画笔

◆ contourRasterSize()

QSize QwtPlotSpectrogram::contourRasterSize	(	const QRectF &	area,
		const QRect &	rect
	)		const

protectedvirtual

Return the raster to be used by the CONREC contour algorithm.

A larger size will improve the precision 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 the resolution depending on pixelSize().

参数

area	Rectangle, where to calculate the contour lines
rect	Rectangle in pixel coordinates, where to paint the contour lines

返回: Raster to be used by the CONREC contour algorithm.

注解: The size will be bounded to rect.size().

参见: drawContourLines(), QwtRasterData::contourLines()

◆ data() [1/2]

QwtRasterData * QwtPlotSpectrogram::data ( )

获取频谱图数据

◆ data() [2/2]

const QwtRasterData * QwtPlotSpectrogram::data ( ) const

获取频谱图数据（常量版本）

◆ defaultContourPen()

QPen QwtPlotSpectrogram::defaultContourPen ( ) const

获取默认等高线画笔

◆ draw()

void QwtPlotSpectrogram::draw	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	canvasRect
	)		const

overridevirtual

绘制频谱图

重载 QwtPlotRasterItem .

◆ drawContourLines()

void QwtPlotSpectrogram::drawContourLines	(	QPainter *	painter,
		const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QwtRasterData::ContourLines &	contourLines
	)		const

protectedvirtual

Paint the contour lines

参数

painter	Painter
xMap	Maps x-values into pixel coordinates.
yMap	Maps y-values into pixel coordinates.
contourLines	Contour lines

参见: renderContourLines(), defaultContourPen(), contourPen()

◆ interval()

QwtInterval QwtPlotSpectrogram::interval ( Qt::Axis axis ) const

overridevirtual

获取轴的边界区间

重载 QwtPlotRasterItem .

◆ pixelHint()

QRectF QwtPlotSpectrogram::pixelHint ( const QRectF & area ) const

overridevirtual

获取像素提示

重载 QwtPlotRasterItem .

◆ renderContourLines()

QwtRasterData::ContourLines QwtPlotSpectrogram::renderContourLines	(	const QRectF &	rect,
		const QSize &	raster
	)		const

protectedvirtual

Calculate contour lines

参数

rect	Rectangle, where to calculate the contour lines
raster	Raster, used by the CONREC algorithm

返回: Calculated contour lines

参见: contourLevels(), setConrecFlag(), QwtRasterData::contourLines()

◆ renderImage()

QImage QwtPlotSpectrogram::renderImage	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	area,
		const QSize &	imageSize
	)		const

overrideprotectedvirtual

Render an image from data and color map.

For each pixel of area the value is mapped into a color.

参数

xMap	X-Scale Map
yMap	Y-Scale Map
area	Requested area for the image in scale coordinates
imageSize	Size of the requested image

返回: A QImage::Format_Indexed8 or QImage::Format_ARGB32 depending on the color map.

参见: QwtRasterData::value(), QwtColorMap::rgb(), QwtColorMap::colorIndex()

实现了 QwtPlotRasterItem.

◆ renderTile()

void QwtPlotSpectrogram::renderTile	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRect &	tile,
		QImage *	image
	)		const

protected

Render a tile of an image.

Rendering in tiles can be used to composite an image in parallel threads.

参数

xMap	X-Scale Map
yMap	Y-Scale Map
tile	Geometry of the tile in image coordinates
image	Image to be rendered

◆ rtti()

int QwtPlotSpectrogram::rtti ( ) const

overridevirtual

获取运行时类型信息

重载 QwtPlotItem .

◆ setColorMap()

void QwtPlotSpectrogram::setColorMap ( QwtColorMap * colorMap )

更改颜色映射

◆ setColorTableSize()

void QwtPlotSpectrogram::setColorTableSize ( int numColors )

限制颜色映射使用的颜色数量

◆ setConrecFlag()

void QwtPlotSpectrogram::setConrecFlag	(	QwtRasterData::ConrecFlag	flag,
		bool	on
	)

修改 CONREC 算法的属性

◆ setContourLevels()

void QwtPlotSpectrogram::setContourLevels ( const QList< double > & levels )

设置等高线的级别

◆ setData()

void QwtPlotSpectrogram::setData ( QwtRasterData * data )

设置要显示的数据

◆ setDefaultContourPen() [1/2]

void QwtPlotSpectrogram::setDefaultContourPen	(	const QColor &	color,
		qreal	width = `0.0`,
		Qt::PenStyle	style = `Qt::SolidLine`
	)

构建并分配等高线的默认画笔

◆ setDefaultContourPen() [2/2]

void QwtPlotSpectrogram::setDefaultContourPen ( const QPen & pen )

设置等高线的默认画笔

◆ setDisplayMode()

void QwtPlotSpectrogram::setDisplayMode	(	DisplayMode	mode,
		bool	on = `true`
	)

设置显示模式

◆ testConrecFlag()

bool QwtPlotSpectrogram::testConrecFlag ( QwtRasterData::ConrecFlag flag ) const

测试 CONREC 算法的属性

◆ testDisplayMode()

bool QwtPlotSpectrogram::testDisplayMode ( DisplayMode mode ) const

测试显示模式

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot/qwt_plot_spectrogram.h
/home/runner/work/QWT/QWT/src/plot/qwt_plot_spectrogram.cpp

类

Public 类型

Public 成员函数

Protected 成员函数

详细描述

成员枚举类型说明

◆ DisplayMode

构造及析构函数说明

◆ QwtPlotSpectrogram()

◆ ~QwtPlotSpectrogram()

成员函数说明

◆ colorMap()

◆ colorTableSize()

◆ contourLevels()

◆ contourPen()

◆ contourRasterSize()

◆ data() [1/2]

◆ data() [2/2]

◆ defaultContourPen()

◆ draw()

◆ drawContourLines()

◆ interval()

◆ pixelHint()

◆ renderContourLines()

◆ renderImage()

◆ renderTile()

◆ rtti()

◆ setColorMap()

◆ setColorTableSize()

◆ setConrecFlag()

◆ setContourLevels()

◆ setData()

◆ setDefaultContourPen() [1/2]

◆ setDefaultContourPen() [2/2]

◆ setDisplayMode()

◆ testConrecFlag()

◆ testDisplayMode()