这是一个绘图数据拾取显示类，用于显示当前的y值，或者显示最近点 More...

#include <qwt_plot_series_data_picker.h>

Inheritance diagram for QwtPlotSeriesDataPicker:

Classes
struct	FeaturePoint

class	PrivateData

Public Types
enum	PickSeriesMode { PickYValue , PickNearestPoint }
	拾取模式 More...

enum	TextPlacement { TextPlaceAuto , TextFollowOnTop , TextFollowOnBottom , TextFollowMouse , TextOnCanvasTopRight , TextOnCanvasTopLeft , TextOnCanvasBottomRight , TextOnCanvasBottomLeft , TextOnCanvasTopAuto , TextOnCanvasBottomAuto }
	The TextArea enum. More...

enum	InterpolationMode { NoInterpolation , LinearInterpolation }
	插值模式枚举 More...

Public Types inherited from QwtPicker
enum	RubberBand { NoRubberBand = 0 , HLineRubberBand , VLineRubberBand , CrossRubberBand , RectRubberBand , EllipseRubberBand , PolygonRubberBand , UserRubberBand = 100 }
	Rubber band style. More...

enum	DisplayMode { AlwaysOff , AlwaysOn , ActiveOnly }
	Display mode. More...

enum	ResizeMode { Stretch , KeepSize }
	Controls what to do with the selected points of an active selection when the observed widget is resized. More...

Public Types inherited from QwtEventPattern
enum	MousePatternCode { MouseSelect1 , MouseSelect2 , MouseSelect3 , MouseSelect4 , MouseSelect5 , MouseSelect6 , MousePatternCount }
	Symbolic mouse input codes. More...

enum	KeyPatternCode { KeySelect1 , KeySelect2 , KeyAbort , KeyLeft , KeyRight , KeyUp , KeyDown , KeyRedo , KeyUndo , KeyHome , KeyPatternCount }
	Symbolic keyboard input codes. More...

Public Member Functions
	QwtPlotSeriesDataPicker (QWidget *canvas)

void	setPickMode (PickSeriesMode mode)
	设置拾取模式

PickSeriesMode	pickMode () const
	获取当前的拾取模式

void	setTextArea (TextPlacement t)
	设置文字显示的区域

TextPlacement	textArea () const
	文字显示的位置

void	setInterpolationMode (InterpolationMode mode)
	设置插值模式

InterpolationMode	interpolationMode () const
	获取插值模式

bool	isInterpolation () const
	判断是否进行插值

void	setNearestSearchWindowSize (int windowSize)
	临近点搜索窗口大小

int	nearestSearchWindowSize () const
	临近点搜索窗口大小

void	setEnableDrawFeaturePoint (bool on=true)
	设置是否绘制特征点

bool	isEnableDrawFeaturePoint () const
	是否绘制特征点

void	setDrawFeaturePointSize (int px)
	设置绘制的特征点的大小

int	drawFeaturePointSize () const
	设置绘制的特征点的大小

void	setTextBackgroundBrush (const QBrush &br)
	设置文本区域的背景颜色

QBrush	textBackgroundBrush () const
	文本区域的背景颜色

void	setTextAlignment (Qt::Alignment al)
	设置文字的对其方式

Qt::Alignment	textAlignment () const
	文字的对其方式

void	setEnableShowXValue (bool on)
	设置是否显示x值

bool	isEnableShowXValue () const
	是否显示x值

QwtText	trackerText (const QPoint &pos) const QWT_OVERRIDE
	trackerText的重载

QRect	trackerRect (const QFont &f) const QWT_OVERRIDE
	绘制的区域在

virtual void	drawRubberBand (QPainter *painter) const QWT_OVERRIDE
	Draw a rubber band, depending on rubberBand()

virtual void	setTrackerPosition (const QPoint &pos) QWT_OVERRIDE
	强制设置trackerPosition，正常这个不需要调用，但有时候没有鼠标也想显示picker可以通过此函数来设置

Public Member Functions inherited from QwtCanvasPicker
	QwtCanvasPicker (QWidget *canvas)

QwtPlot *	plot ()

const QwtPlot *	plot () const

QWidget *	canvas ()

const QWidget *	canvas () const

Public Member Functions inherited from QwtPicker
	QwtPicker (QWidget *parent)
	Constructor.

	QwtPicker (RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
	Constructor.

virtual	~QwtPicker ()
	Destructor.

void	setStateMachine (QwtPickerMachine *)
	Set a state machine and delete the previous one.

const QwtPickerMachine *	stateMachine () const

QwtPickerMachine *	stateMachine ()

void	setRubberBand (RubberBand)
	Set the rubber band style.

RubberBand	rubberBand () const

void	setTrackerMode (DisplayMode)
	Set the display mode of the tracker.

DisplayMode	trackerMode () const

void	setResizeMode (ResizeMode)
	Set the resize mode.

ResizeMode	resizeMode () const

void	setRubberBandPen (const QPen &)
	Set the pen for the rubberband.

QPen	rubberBandPen () const

void	setTrackerPen (const QPen &)
	Set the pen for the tracker.

QPen	trackerPen () const

void	setTrackerFont (const QFont &)
	Set the font for the tracker.

QFont	trackerFont () const

bool	isEnabled () const

bool	isActive () const
	A picker is active between begin() and end().

virtual bool	eventFilter (QObject , QEvent ) QWT_OVERRIDE
	Event filter.

QWidget *	parentWidget ()
	Return the parent widget, where the selection happens.

const QWidget *	parentWidget () const
	Return the parent widget, where the selection happens.

virtual QPainterPath	pickArea () const
	Find the area of the observed widget, where selection might happen.

virtual void	drawTracker (QPainter *) const
	Draw the tracker.

virtual QRegion	trackerMask () const
	Calculate the mask for the tracker overlay.

virtual QRegion	rubberBandMask () const
	Calculate the mask for the rubber band overlay.

QPoint	trackerPosition () const

QPolygon	selection () const

void	update ()

void	setActive (bool on)

Public Member Functions inherited from QwtEventPattern
	QwtEventPattern ()
	Constructor.

virtual	~QwtEventPattern ()
	Destructor.

void	initMousePattern (int numButtons)
	Set default mouse patterns, depending on the number of mouse buttons.

void	initKeyPattern ()
	Set default mouse patterns.

void	setMousePattern (MousePatternCode, Qt::MouseButton button, Qt::KeyboardModifiers=Qt::NoModifier)
	Change one mouse pattern.

void	setKeyPattern (KeyPatternCode, int key, Qt::KeyboardModifiers modifiers=Qt::NoModifier)
	Change one key pattern.

void	setMousePattern (const QVector< MousePattern > &)
	Change the mouse event patterns.

void	setKeyPattern (const QVector< KeyPattern > &)
	Change the key event patterns.

const QVector< MousePattern > &	mousePattern () const

const QVector< KeyPattern > &	keyPattern () const

QVector< MousePattern > &	mousePattern ()

QVector< KeyPattern > &	keyPattern ()

bool	mouseMatch (MousePatternCode, const QMouseEvent *) const
	Compare a mouse event with an event pattern.

bool	keyMatch (KeyPatternCode, const QKeyEvent *) const
	Compare a key event with an event pattern.

Protected Member Functions
virtual QString	valueString (const QList< FeaturePoint > &fps) const

virtual void	drawFeaturePoints (QPainter *painter) const
	绘制特征点，把捕获到的点进行绘制

virtual void	move (const QPoint &pos) QWT_OVERRIDE
	Move the last point of the selection The moved() signal is emitted.

QString	formatAxisValue (double value, int axisId, QwtPlot *plot) const

void	updateFeaturePoint (const QPoint &pos)

Protected Member Functions inherited from QwtPicker
virtual QPolygon	adjustedPoints (const QPolygon &) const
	Map the pickedPoints() into a selection()

virtual void	transition (const QEvent *)
	Passes an event to the state machine and executes the resulting commands.

virtual void	begin ()
	Open a selection setting the state to active.

virtual void	append (const QPoint &)
	Append a point to the selection and update rubber band and tracker.

virtual void	remove ()
	Remove the last point of the selection The removed() signal is emitted.

virtual bool	end (bool ok=true)
	Close a selection setting the state to inactive.

virtual bool	accept (QPolygon &) const
	Validate and fix up the selection.

virtual void	reset ()
	Reset the state machine and terminate ( end(false) ) the selection.

virtual void	widgetMousePressEvent (QMouseEvent *)
	Handle a mouse press event for the observed widget.

virtual void	widgetMouseReleaseEvent (QMouseEvent *)
	Handle a mouse release event for the observed widget.

virtual void	widgetMouseDoubleClickEvent (QMouseEvent *)
	Handle mouse double click event for the observed widget.

virtual void	widgetMouseMoveEvent (QMouseEvent *)
	Handle a mouse move event for the observed widget.

virtual void	widgetWheelEvent (QWheelEvent *)
	Handle a wheel event for the observed widget.

virtual void	widgetKeyPressEvent (QKeyEvent *)
	Handle a key press event for the observed widget.

virtual void	widgetKeyReleaseEvent (QKeyEvent *)
	Handle a key release event for the observed widget.

virtual void	widgetEnterEvent (QEvent *)
	Handle a enter event for the observed widget.

virtual void	widgetLeaveEvent (QEvent *)
	Handle a leave event for the observed widget.

virtual void	stretchSelection (const QSize &oldSize, const QSize &newSize)
	Scale the selection by the ratios of oldSize and newSize The changed() signal is emitted.

virtual void	updateDisplay ()
	Update the state of rubber band and tracker label.

const QwtWidgetOverlay *	rubberBandOverlay () const

const QwtWidgetOverlay *	trackerOverlay () const

const QPolygon &	pickedPoints () const
	Return the points, that have been collected so far.

Protected Member Functions inherited from QwtEventPattern
virtual bool	mouseMatch (const MousePattern &, const QMouseEvent *) const
	Compare a mouse event with an event pattern.

virtual bool	keyMatch (const KeyPattern &, const QKeyEvent *) const
	Compare a key event with an event pattern.

Additional Inherited Members
Public Slots inherited from QwtPicker
void	setEnabled (bool)
	En/disable the picker.

Signals inherited from QwtPicker
void	activated (bool on)
	A signal indicating, when the picker has been activated.

void	selected (const QPolygon &polygon)
	A signal emitting the selected points, at the end of a selection.

void	appended (const QPoint &pos)
	A signal emitted when a point has been appended to the selection.

void	moved (const QPoint &pos)
	A signal emitted whenever the last appended point of the selection has been moved.

void	removed (const QPoint &pos)
	A signal emitted whenever the last appended point of the selection has been removed.

void	changed (const QPolygon &selection)
	A signal emitted when the active selection has been changed.

Properties inherited from QwtPicker
bool	isEnabled

ResizeMode	resizeMode

DisplayMode	trackerMode

QPen	trackerPen

QFont	trackerFont

RubberBand	rubberBand

QPen	rubberBandPen

Detailed Description

这是一个绘图数据拾取显示类，用于显示当前的y值，或者显示最近点

Member Enumeration Documentation

◆ InterpolationMode

enum QwtPlotSeriesDataPicker::InterpolationMode

插值模式枚举

Enumerator
NoInterpolation	不进行插值，使用最近的数据点
LinearInterpolation	线性插值，在相邻数据点之间进行插值计算

◆ PickSeriesMode

enum QwtPlotSeriesDataPicker::PickSeriesMode

拾取模式

Enumerator
PickYValue	拾取y值（默认）
PickNearestPoint	拾取最接近鼠标光标位置的点（此模式会比较耗时，曲线点非常多的时候谨慎使用）

◆ TextPlacement

enum QwtPlotSeriesDataPicker::TextPlacement

The TextArea enum.

Enumerator
TextPlaceAuto	自动放置（pick y的时候放置在顶部，pick nearest的时候跟随鼠标）
TextFollowOnTop	放在绘图区的顶部(默认）
TextFollowOnBottom	放在绘图区的底部
TextFollowMouse	跟随鼠标指针
TextOnCanvasTopRight	文字在画布的右上角
TextOnCanvasTopLeft	文字在画布的左上角
TextOnCanvasBottomRight	文字在画布的右下角
TextOnCanvasBottomLeft	文字在画布的左下角
TextOnCanvasTopAuto	文字在画布的上边，具体是左是右根据鼠标位置来自动识别，尽量避免不影响鼠标位置
TextOnCanvasBottomAuto	文字在画布的下边，具体是左是右根据鼠标位置来自动识别，尽量避免不影响鼠标位置

Member Function Documentation

◆ drawFeaturePoints()

void QwtPlotSeriesDataPicker::drawFeaturePoints ( QPainter * painter ) const

protectedvirtual

绘制特征点，把捕获到的点进行绘制

如果想特征点绘制进行自定义，可重写此函数

Note: setEnableDrawFeaturePoint

Parameters

painter

◆ drawFeaturePointSize()

int QwtPlotSeriesDataPicker::drawFeaturePointSize ( ) const

设置绘制的特征点的大小

Returns

◆ drawRubberBand()

void QwtPlotSeriesDataPicker::drawRubberBand ( QPainter * painter ) const

virtual

Draw a rubber band, depending on rubberBand()

Parameters

painter Painter, initialized with a clip region

See also: rubberBand(), RubberBand

Reimplemented from QwtPicker.

◆ interpolationMode()

QwtPlotSeriesDataPicker::InterpolationMode QwtPlotSeriesDataPicker::interpolationMode ( ) const

获取插值模式

Returns: 当前的插值模式

◆ isEnableDrawFeaturePoint()

bool QwtPlotSeriesDataPicker::isEnableDrawFeaturePoint ( ) const

是否绘制特征点

Returns

◆ isEnableShowXValue()

bool QwtPlotSeriesDataPicker::isEnableShowXValue ( ) const

是否显示x值

Returns

◆ isInterpolation()

bool QwtPlotSeriesDataPicker::isInterpolation ( ) const

判断是否进行插值

如果插值，那么在鼠标不在对应点上时，会插值找到对应的连接线上的点

Returns

◆ move()

void QwtPlotSeriesDataPicker::move ( const QPoint & pos )

protectedvirtual

Move the last point of the selection The moved() signal is emitted.

Parameters

pos	New position

See also: isActive(), begin(), end(), append()

Reimplemented from QwtPicker.

◆ nearestSearchWindowSize()

int QwtPlotSeriesDataPicker::nearestSearchWindowSize ( ) const

临近点搜索窗口大小

Returns: 此尺寸会返回负数，具体可见setNearestSearchWindowSize

See also: setNearestSearchWindowSize

◆ pickMode()

QwtPlotSeriesDataPicker::PickSeriesMode QwtPlotSeriesDataPicker::pickMode ( ) const

获取当前的拾取模式

Returns

◆ setDrawFeaturePointSize()

void QwtPlotSeriesDataPicker::setDrawFeaturePointSize ( int px )

设置绘制的特征点的大小

Parameters

px

◆ setEnableDrawFeaturePoint()

void QwtPlotSeriesDataPicker::setEnableDrawFeaturePoint ( bool on = true )

设置是否绘制特征点

Parameters

on

◆ setEnableShowXValue()

void QwtPlotSeriesDataPicker::setEnableShowXValue ( bool on )

设置是否显示x值

Parameters

on

◆ setInterpolationMode()

void QwtPlotSeriesDataPicker::setInterpolationMode ( QwtPlotSeriesDataPicker::InterpolationMode mode )

设置插值模式

Parameters

mode 插值模式

◆ setNearestSearchWindowSize()

void QwtPlotSeriesDataPicker::setNearestSearchWindowSize ( int windowSize )

临近点搜索窗口大小

窗口大小决定了临近点搜索的范围，避免全曲线遍历

窗口尺寸可以设置为负值，负值将是以曲线点数的百分比进行窗口设置：

0: 不使用窗口，搜索整个曲线
正数: 固定的窗口大小（数据点数量）
负数: 自适应窗口，使用曲线数据点总数的百分比（取绝对值，如-5表示5）

Parameters

windowSize 窗口尺寸

此属性默认为-5

◆ setPickMode()

void QwtPlotSeriesDataPicker::setPickMode ( PickSeriesMode mode )

设置拾取模式

Parameters

mode 拾取模式

◆ setTextAlignment()

void QwtPlotSeriesDataPicker::setTextAlignment ( Qt::Alignment al )

设置文字的对其方式

Parameters

al

◆ setTextArea()

void QwtPlotSeriesDataPicker::setTextArea ( QwtPlotSeriesDataPicker::TextPlacement t )

设置文字显示的区域

Parameters

t

◆ setTextBackgroundBrush()

void QwtPlotSeriesDataPicker::setTextBackgroundBrush ( const QBrush & br )

设置文本区域的背景颜色

Parameters

br

◆ setTrackerPosition()

void QwtPlotSeriesDataPicker::setTrackerPosition ( const QPoint & pos )

virtual

强制设置trackerPosition，正常这个不需要调用，但有时候没有鼠标也想显示picker可以通过此函数来设置

Parameters

pos

Reimplemented from QwtPicker.

◆ textAlignment()

Qt::Alignment QwtPlotSeriesDataPicker::textAlignment ( ) const

文字的对其方式

Returns

◆ textArea()

QwtPlotSeriesDataPicker::TextPlacement QwtPlotSeriesDataPicker::textArea ( ) const

文字显示的位置

Returns

See also: QwtPlotSeriesDataPicker::TextPlacement

◆ textBackgroundBrush()

QBrush QwtPlotSeriesDataPicker::textBackgroundBrush ( ) const

文本区域的背景颜色

Returns

◆ trackerRect()

QRect QwtPlotSeriesDataPicker::trackerRect ( const QFont & f ) const

virtual

绘制的区域在

根据文字显示的位置，调整矩形

Parameters

f

Returns

Reimplemented from QwtPicker.

◆ trackerText()

QwtText QwtPlotSeriesDataPicker::trackerText ( const QPoint & pos ) const

virtual

trackerText的重载

QwtPlotPicker是基于固定x和y轴的，QwtPlot上的item有可能绑定不同的x轴和y轴，因此这里不使用trackerTextF

通过pickYPoint或

Parameters

pos

Returns

Reimplemented from QwtPicker.

The documentation for this class was generated from the following files:

/home/runner/work/QWT/QWT/src/qwt_plot_series_data_picker.h
/home/runner/work/QWT/QWT/src/qwt_plot_series_data_picker.cpp

Classes

Public Types

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ InterpolationMode

◆ PickSeriesMode

◆ TextPlacement

Member Function Documentation

◆ drawFeaturePoints()

◆ drawFeaturePointSize()

◆ drawRubberBand()

◆ interpolationMode()

◆ isEnableDrawFeaturePoint()

◆ isEnableShowXValue()

◆ isInterpolation()

◆ move()

◆ nearestSearchWindowSize()

◆ pickMode()

◆ setDrawFeaturePointSize()

◆ setEnableDrawFeaturePoint()

◆ setEnableShowXValue()

◆ setInterpolationMode()

◆ setNearestSearchWindowSize()

◆ setPickMode()

◆ setTextAlignment()

◆ setTextArea()

◆ setTextBackgroundBrush()

◆ setTrackerPosition()

◆ textAlignment()

◆ textArea()

◆ textBackgroundBrush()

◆ trackerRect()

◆ trackerText()