这是一个绘图数据拾取显示类，用于显示当前的y值，或者显示最近点更多...

#include <qwt_plot_series_data_picker.h>

类 QwtPlotSeriesDataPicker 继承关系图:

类
struct	FeaturePoint
	特征点结构更多...

class	PrivateData

Public 类型
enum	PickSeriesMode { PickYValue , PickNearestPoint }
	拾取模式更多...

enum	TextPlacement { TextPlaceAuto , TextFollowOnTop , TextFollowOnBottom , TextFollowMouse , TextOnCanvasTopRight , TextOnCanvasTopLeft , TextOnCanvasBottomRight , TextOnCanvasBottomLeft , TextOnCanvasTopAuto , TextOnCanvasBottomAuto }
	文本放置选项更多...

enum	InterpolationMode { NoInterpolation , LinearInterpolation }
	插值模式更多...

Public 类型继承自 QwtPicker
enum	RubberBand { NoRubberBand = 0 , HLineRubberBand , VLineRubberBand , CrossRubberBand , RectRubberBand , EllipseRubberBand , PolygonRubberBand , UserRubberBand = 100 }
	橡皮筋样式更多...

enum	DisplayMode { AlwaysOff , AlwaysOn , ActiveOnly }
	显示模式更多...

enum	ResizeMode { Stretch , KeepSize }
	控制当观察部件调整大小时对选定点的处理方式更多...

Public 类型继承自 QwtEventPattern
enum	MousePatternCode { MouseSelect1 , MouseSelect2 , MouseSelect3 , MouseSelect4 , MouseSelect5 , MouseSelect6 , MousePatternCount }
	Symbolic mouse input codes 更多...

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

Public 成员函数
	QwtPlotSeriesDataPicker (QWidget *canvas)
	Constructor

	~QwtPlotSeriesDataPicker ()
	Destructor

void	setPickMode (PickSeriesMode mode)
	Set pick mode

PickSeriesMode	pickMode () const
	Get pick mode

void	setTextArea (TextPlacement t)
	Set text placement

TextPlacement	textArea () const
	Get text placement

void	setInterpolationMode (InterpolationMode mode)
	Set interpolation mode

InterpolationMode	interpolationMode () const
	Get interpolation mode

bool	isInterpolation () const
	Check if interpolation is enabled

void	setNearestSearchWindowSize (int windowSize)
	Set nearest search window size

int	nearestSearchWindowSize () const
	Get nearest search window size

void	setEnableDrawFeaturePoint (bool on=true)
	Enable/disable feature point drawing

bool	isEnableDrawFeaturePoint () const
	Check if feature point drawing is enabled

void	setDrawFeaturePointSize (int px)
	Set feature point size

int	drawFeaturePointSize () const
	Get feature point size

void	setTextBackgroundBrush (const QBrush &br)
	Set text background brush

QBrush	textBackgroundBrush () const
	Get text background brush

void	setTextAlignment (Qt::Alignment al)
	Set text alignment

Qt::Alignment	textAlignment () const
	Get text alignment

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

bool	isEnableShowXValue () const
	是否显示x值

void	setTextTrackerOffset (const QPoint &offset)
	设置文本跟随鼠标模式下追踪矩形的偏移量

QPoint	textTrackerOffset () const
	获取当前文本跟随鼠标模式下追踪矩形的偏移量

QwtText	trackerText (const QPoint &pos) const override
	返回位置的标签

QRect	trackerRect (const QFont &f) const override
	从追踪器当前位置计算追踪器文本的边界矩形

virtual void	drawRubberBand (QPainter *painter) const override
	根据橡皮筋样式绘制橡皮筋

virtual void	setTrackerPosition (const QPoint &pos) override
	手动设置追踪器位置

Public 成员函数继承自 QwtCanvasPicker
	QwtCanvasPicker (QWidget *canvas)
	构造函数，带画布控件

	~QwtCanvasPicker ()
	析构函数

QwtPlot *	plot ()
	获取关联的绘图

const QwtPlot *	plot () const
	获取关联的绘图（const 版本）

QWidget *	canvas ()
	获取画布控件

const QWidget *	canvas () const
	获取画布控件（const 版本）

Public 成员函数继承自 QwtPicker
	QwtPicker (QWidget *parent)
	构造函数

	QwtPicker (RubberBand rubberBand, DisplayMode trackerMode, QWidget *)

void	setStateMachine (QwtPickerMachine *)
	设置状态机并删除前一个

const QwtPickerMachine *	stateMachine () const
	返回分配的状态机（const）

QwtPickerMachine *	stateMachine ()
	返回分配的状态机

void	setRubberBand (RubberBand)
	设置橡皮筋样式

RubberBand	rubberBand () const
	返回橡皮筋样式

void	setTrackerMode (DisplayMode)
	设置追踪器的显示模式

DisplayMode	trackerMode () const
	返回追踪器显示模式

void	setResizeMode (ResizeMode)
	设置调整大小模式

ResizeMode	resizeMode () const
	返回调整大小模式

void	setRubberBandPen (const QPen &)
	设置橡皮筋的画笔

QPen	rubberBandPen () const
	返回橡皮筋画笔

void	setTrackerPen (const QPen &)
	设置追踪器的画笔

QPen	trackerPen () const
	返回追踪器画笔

void	setTrackerFont (const QFont &)
	设置追踪器的字体

QFont	trackerFont () const
	返回追踪器字体

bool	isEnabled () const
	启用时返回 true，否则返回 false

bool	isActive () const
	选择器在 begin() 和 end() 之间处于活动状态

virtual bool	eventFilter (QObject , QEvent ) override
	处理事件的事件过滤器

QWidget *	parentWidget ()
	返回发生选择的父控件

const QWidget *	parentWidget () const
	返回发生选择的父控件（const）

virtual QPainterPath	pickArea () const
	找到观察部件上可能发生选择的区域

virtual void	drawTracker (QPainter *) const
	绘制追踪器

virtual QRegion	trackerMask () const
	计算追踪器覆盖层的掩码

virtual QRegion	rubberBandMask () const
	计算橡皮筋覆盖层的掩码

QPoint	trackerPosition () const
	返回追踪器的当前位置

QPolygon	selection () const
	返回选定的点

void	update ()

void	setActive (bool on)

Public 成员函数继承自 QwtEventPattern
	QwtEventPattern ()
	构造函数

virtual	~QwtEventPattern ()
	析构函数

void	initMousePattern (int numButtons)
	根据鼠标按钮数量设置默认鼠标模式

void	initKeyPattern ()
	设置默认按键模式

void	setMousePattern (MousePatternCode, Qt::MouseButton button, Qt::KeyboardModifiers=Qt::NoModifier)
	更改一个鼠标模式

void	setKeyPattern (KeyPatternCode, int key, Qt::KeyboardModifiers modifiers=Qt::NoModifier)
	更改一个按键模式

void	setMousePattern (const QVector< MousePattern > &)
	更改鼠标事件模式

void	setKeyPattern (const QVector< KeyPattern > &)
	更改按键事件模式

const QVector< MousePattern > &	mousePattern () const
	返回鼠标模式向量

const QVector< KeyPattern > &	keyPattern () const
	返回按键模式向量

QVector< MousePattern > &	mousePattern ()
	返回鼠标模式向量

QVector< KeyPattern > &	keyPattern ()
	返回按键模式向量

bool	mouseMatch (MousePatternCode, const QMouseEvent *) const
	将鼠标事件与事件模式进行比较

bool	keyMatch (KeyPatternCode, const QKeyEvent *) const
	将按键事件与事件模式进行比较

Protected 成员函数
virtual int	pickYValue (const QwtPlot *p, const QPoint &pos, bool interpolate=false)
	获取绘图区域指定屏幕位置上所有可拾取的Y值

virtual int	pickNearestPoint (const QwtPlot *plot, const QPoint &pos, int windowSize=-5)
	获取绘图区域指定屏幕位置上最近的可拾取点

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

virtual void	drawFeaturePoint (QPainter painter, const QwtPlot plot, const QwtPlotItem *item, const QPointF &itemPoint) const
	在绘图区域绘制单个特征点

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

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

Protected 成员函数继承自 QwtPicker
virtual QPolygon	adjustedPoints (const QPolygon &) const
	将 pickedPoints() 映射为 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
	返回显示橡皮筋的覆盖层

const QwtWidgetOverlay *	trackerOverlay () const
	返回显示追踪器文本的覆盖层

const QPolygon &	pickedPoints () const
	返回到目前为止收集的点

Protected 成员函数继承自 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.

额外继承的成员函数
Public 槽继承自 QwtPicker
void	setEnabled (bool)
	启用或禁用选择器

信号继承自 QwtPicker
void	activated (bool on)
	当选择器被激活时发出的信号

void	selected (const QPolygon &polygon)
	在选择结束时发出选定点的信号

void	appended (const QPoint &pos)
	当一个点被添加到选择时发出的信号

void	moved (const QPoint &pos)
	当选择的最后一个添加点被移动时发出的信号

void	removed (const QPoint &pos)
	当选择的最后一个添加点被移除时发出的信号

void	changed (const QPolygon &selection)
	当活动选择被更改时发出的信号

属性继承自 QwtPicker
bool	isEnabled

ResizeMode	resizeMode

DisplayMode	trackerMode

QPen	trackerPen

QFont	trackerFont

RubberBand	rubberBand

QPen	rubberBandPen

详细描述

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

成员枚举类型说明

◆ InterpolationMode

enum QwtPlotSeriesDataPicker::InterpolationMode

插值模式

枚举值
NoInterpolation	No interpolation, use nearest data point
LinearInterpolation	Linear interpolation between adjacent data points

◆ PickSeriesMode

enum QwtPlotSeriesDataPicker::PickSeriesMode

拾取模式

枚举值
PickYValue	Pick y-value (default)
PickNearestPoint	Pick the nearest point to the mouse cursor position (this mode may be time-consuming, use with caution when there are many curve points)

◆ TextPlacement

enum QwtPlotSeriesDataPicker::TextPlacement

文本放置选项

枚举值
TextPlaceAuto	Auto placement (top for pick y, follow mouse for pick nearest)
TextFollowOnTop	On top of the plot area (default)
TextFollowOnBottom	On bottom of the plot area
TextFollowMouse	Follow mouse pointer
TextOnCanvasTopRight	Text on canvas top right
TextOnCanvasTopLeft	Text on canvas top left
TextOnCanvasBottomRight	Text on canvas bottom right
TextOnCanvasBottomLeft	Text on canvas bottom left
TextOnCanvasTopAuto	Text on canvas top, left or right auto-detected based on mouse position
TextOnCanvasBottomAuto	Text on canvas bottom, left or right auto-detected based on mouse position

成员函数说明

◆ drawFeaturePoint()

void QwtPlotSeriesDataPicker::drawFeaturePoint	(	QPainter *	painter,
		const QwtPlot *	plot,
		const QwtPlotItem *	item,
		const QPointF &	itemPoint
	)		const

protectedvirtual

在绘图区域绘制单个特征点

◆ drawFeaturePointSize()

int QwtPlotSeriesDataPicker::drawFeaturePointSize ( ) const

Get feature point size

设置绘制的特征点的大小

◆ drawRubberBand()

void QwtPlotSeriesDataPicker::drawRubberBand ( QPainter * painter ) const

overridevirtual

根据橡皮筋样式绘制橡皮筋

重载 QwtPicker .

◆ interpolationMode()

QwtPlotSeriesDataPicker::InterpolationMode QwtPlotSeriesDataPicker::interpolationMode ( ) const

Get interpolation mode

获取插值模式

◆ isEnableDrawFeaturePoint()

bool QwtPlotSeriesDataPicker::isEnableDrawFeaturePoint ( ) const

Check if feature point drawing is enabled

是否绘制特征点

◆ isEnableShowXValue()

bool QwtPlotSeriesDataPicker::isEnableShowXValue ( ) const

是否显示x值

◆ isInterpolation()

bool QwtPlotSeriesDataPicker::isInterpolation ( ) const

Check if interpolation is enabled

判断是否进行插值

◆ move()

void QwtPlotSeriesDataPicker::move ( const QPoint & pos )

overrideprotectedvirtual

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

参数

pos	New position

参见: isActive(), begin(), end(), append()

重载 QwtPicker .

◆ nearestSearchWindowSize()

int QwtPlotSeriesDataPicker::nearestSearchWindowSize ( ) const

Get nearest search window size

临近点搜索窗口大小

◆ pickMode()

QwtPlotSeriesDataPicker::PickSeriesMode QwtPlotSeriesDataPicker::pickMode ( ) const

Get pick mode

获取当前的拾取模式

◆ pickNearestPoint()

int QwtPlotSeriesDataPicker::pickNearestPoint	(	const QwtPlot *	plot,
		const QPoint &	pos,
		int	windowSize = `-5`
	)

protectedvirtual

获取绘图区域指定屏幕位置上最近的可拾取点

参数

plot	绘图对象
pos	屏幕位置
windowSize	窗口尺寸 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%,-10代表10）

返回: 包含最近绘图项和对应数据点的配对

注解: 此函数考虑了寄生绘图，可以传入宿主绘图或寄生绘图，它会把全部绘图的数据进行获取

◆ pickYValue()

int QwtPlotSeriesDataPicker::pickYValue	(	const QwtPlot *	p,
		const QPoint &	pos,
		bool	interpolate = `false`
	)

protectedvirtual

获取绘图区域指定屏幕位置上所有可拾取的Y值

◆ setDrawFeaturePointSize()

void QwtPlotSeriesDataPicker::setDrawFeaturePointSize ( int px )

Set feature point size

设置绘制的特征点的大小

◆ setEnableDrawFeaturePoint()

void QwtPlotSeriesDataPicker::setEnableDrawFeaturePoint ( bool on = true )

Enable/disable feature point drawing

设置是否绘制特征点

◆ setEnableShowXValue()

void QwtPlotSeriesDataPicker::setEnableShowXValue ( bool on )

设置是否显示x值

◆ setInterpolationMode()

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

Set interpolation mode

设置插值模式

◆ setNearestSearchWindowSize()

void QwtPlotSeriesDataPicker::setNearestSearchWindowSize ( int windowSize )

Set nearest search window size

临近点搜索窗口大小

◆ setPickMode()

void QwtPlotSeriesDataPicker::setPickMode ( PickSeriesMode mode )

Set pick mode

设置拾取模式

◆ setTextAlignment()

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

Set text alignment

设置文字的对齐方式

◆ setTextArea()

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

Set text placement

设置文字显示的区域

◆ setTextBackgroundBrush()

void QwtPlotSeriesDataPicker::setTextBackgroundBrush ( const QBrush & br )

Set text background brush

设置文本区域的背景颜色

◆ setTextTrackerOffset()

void QwtPlotSeriesDataPicker::setTextTrackerOffset ( const QPoint & offset )

设置文本跟随鼠标模式下追踪矩形的偏移量

◆ setTrackerPosition()

void QwtPlotSeriesDataPicker::setTrackerPosition ( const QPoint & pos )

overridevirtual

手动设置追踪器位置

重载 QwtPicker .

◆ textAlignment()

Qt::Alignment QwtPlotSeriesDataPicker::textAlignment ( ) const

Get text alignment

文字的对齐方式

◆ textArea()

QwtPlotSeriesDataPicker::TextPlacement QwtPlotSeriesDataPicker::textArea ( ) const

Get text placement

文字显示的位置

◆ textBackgroundBrush()

QBrush QwtPlotSeriesDataPicker::textBackgroundBrush ( ) const

Get text background brush

文本区域的背景颜色

◆ textTrackerOffset()

QPoint QwtPlotSeriesDataPicker::textTrackerOffset ( ) const

获取当前文本跟随鼠标模式下追踪矩形的偏移量

◆ trackerRect()

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

overridevirtual

从追踪器当前位置计算追踪器文本的边界矩形

重载 QwtPicker .

◆ trackerText()

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

overridevirtual

返回位置的标签

重载 QwtPicker .

该类的文档由以下文件生成:

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

类

Public 类型

Public 成员函数

Protected 成员函数

额外继承的成员函数

详细描述

成员枚举类型说明

◆ InterpolationMode

◆ PickSeriesMode

◆ TextPlacement

成员函数说明

◆ drawFeaturePoint()

◆ drawFeaturePointSize()

◆ drawRubberBand()

◆ interpolationMode()

◆ isEnableDrawFeaturePoint()

◆ isEnableShowXValue()

◆ isInterpolation()

◆ move()

◆ nearestSearchWindowSize()

◆ pickMode()

◆ pickNearestPoint()

◆ pickYValue()

◆ setDrawFeaturePointSize()

◆ setEnableDrawFeaturePoint()

◆ setEnableShowXValue()

◆ setInterpolationMode()

◆ setNearestSearchWindowSize()

◆ setPickMode()

◆ setTextAlignment()

◆ setTextArea()

◆ setTextBackgroundBrush()

◆ setTextTrackerOffset()

◆ setTrackerPosition()

◆ textAlignment()

◆ textArea()

◆ textBackgroundBrush()

◆ textTrackerOffset()

◆ trackerRect()

◆ trackerText()