A plot data picker class for displaying current y-values or nearest points 更多...

#include <qwt_plot_series_data_picker.h>

类 QwtPlotSeriesDataPicker 继承关系图:

类
struct	FeaturePoint
	Feature point structure 更多...

class	PrivateData

Public 类型
enum	PickSeriesMode { PickYValue , PickNearestPoint }
	Pick modes 更多...

enum	TextPlacement { TextPlaceAuto , TextFollowOnTop , TextFollowOnBottom , TextFollowMouse , TextOnCanvasTopRight , TextOnCanvasTopLeft , TextOnCanvasBottomRight , TextOnCanvasBottomLeft , TextOnCanvasTopAuto , TextOnCanvasBottomAuto }
	Text placement options 更多...

enum	InterpolationMode { NoInterpolation , LinearInterpolation }
	Interpolation modes 更多...

Public 类型继承自 QwtPicker
enum	RubberBand { NoRubberBand = 0 , HLineRubberBand , VLineRubberBand , CrossRubberBand , RectRubberBand , EllipseRubberBand , PolygonRubberBand , UserRubberBand = 100 }
	Rubber band style 更多...

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

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

信号
void	clicked (QwtPlotSeriesDataPicker *picker, const QPoint &pos)
	Emitted when the user left-clicks on the plot canvas

void	doubleClicked (QwtPlotSeriesDataPicker *picker, const QPoint &pos)
	Emitted when the user double-left-clicks on the plot canvas

信号继承自 QwtPicker
void	activated (bool on)
	Signal indicating when the picker has been activated

void	selected (const QPolygon &polygon)
	Signal emitting the selected points at the end of a selection

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

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

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

void	changed (const QPolygon &selection)
	Signal emitted when the active selection has been changed

Public 成员函数
	QwtPlotSeriesDataPicker (QWidget *canvas)
	Constructor

	~QwtPlotSeriesDataPicker () override
	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

QList< FeaturePoint >	featurePoints () const
	Returns the list of feature points currently picked by the tracker

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)
	Whether to show X value

bool	isEnableShowXValue () const
	Check if showing X value is enabled

void	setTextTrackerOffset (const QPoint &offset)
	Set the tracker rectangle offset in TextFollowMouse mode

QPoint	textTrackerOffset () const
	Get the current tracker rectangle offset in TextFollowMouse mode

QwtText	trackerText (const QPoint &pos) const override
	Top rectangle text

QRect	trackerRect (const QFont &f) const override
	Keep rectangle at top

virtual void	drawRubberBand (QPainter *painter) const override
	Draw rubber band

virtual void	setTrackerPosition (const QPoint &pos) override
	Manually set position

Public 成员函数继承自 QwtCanvasPicker
	QwtCanvasPicker (QWidget *canvas)
	Constructor with canvas widget

	~QwtCanvasPicker () override
	Destructor

QwtPlot *	plot ()
	Get the associated plot

const QwtPlot *	plot () const
	Get the associated plot (const version)

QWidget *	canvas ()
	Get the canvas widget

const QWidget *	canvas () const
	Get the canvas widget (const version)

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

	QwtPicker (RubberBand rubberBand, DisplayMode trackerMode, QWidget *)

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

const QwtPickerMachine *	stateMachine () const
	Return the assigned state machine (const)

QwtPickerMachine *	stateMachine ()
	Return the assigned state machine

void	setRubberBand (RubberBand)
	Set the rubber band style

RubberBand	rubberBand () const
	Return the rubber band style

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

DisplayMode	trackerMode () const
	Return the tracker display mode

void	setResizeMode (ResizeMode)
	Set the resize mode

ResizeMode	resizeMode () const
	Return the resize mode

void	setRubberBandPen (const QPen &)
	Set the pen for the rubber band

QPen	rubberBandPen () const
	Return the rubber band pen

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

QPen	trackerPen () const
	Return the tracker pen

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

QFont	trackerFont () const
	Return the tracker font

bool	isEnabled () const
	Return true when enabled, false otherwise

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

virtual bool	eventFilter (QObject , QEvent ) override
	Event filter for handling events

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

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

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
	Return the current position of the tracker

QPolygon	selection () const
	Return the selected points

void	update ()

void	setActive (bool on)

Public 成员函数继承自 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 key 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
	Return the mouse pattern vector

const QVector< KeyPattern > &	keyPattern () const
	Return the key pattern vector

QVector< MousePattern > &	mousePattern ()
	Return the mouse pattern vector

QVector< KeyPattern > &	keyPattern ()
	Return the key pattern vector

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 成员函数
virtual int	pickYValue (const QwtPlot *p, const QPoint &pos, bool interpolate=false)
	Get all pickable Y values at the specified screen position; returns the number picked

virtual int	pickNearestPoint (const QwtPlot *plot, const QPoint &pos, int windowSize=-5)
	Get the nearest pickable point at the specified screen position (window-based fast indexing)

virtual void	widgetMousePressEvent (QMouseEvent *event) override
	Handle mouse press events on the widget

virtual void	widgetMouseDoubleClickEvent (QMouseEvent *event) override
	Handle mouse double-click events on the widget

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

virtual void	drawFeaturePoint (QPainter painter, const QwtPlot plot, const QwtPlotItem *item, const QPointF &itemPoint) const
	Draw a single feature point on the plot

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
	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	widgetMouseReleaseEvent (QMouseEvent *)
	Handle a mouse release 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
	Return the overlay displaying the rubber band

const QwtWidgetOverlay *	trackerOverlay () const
	Return the overlay displaying the tracker text

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

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)
	Enable or disable the picker

属性继承自 QwtPicker
bool	isEnabled

ResizeMode	resizeMode

DisplayMode	trackerMode

QPen	trackerPen

QFont	trackerFont

RubberBand	rubberBand

QPen	rubberBandPen

详细描述

A plot data picker class for displaying current y-values or nearest points

QwtPlotSeriesDataPicker is a plot data picker class that displays current y-values or the nearest points to the mouse cursor position.

成员枚举类型说明

◆ InterpolationMode

enum QwtPlotSeriesDataPicker::InterpolationMode

Interpolation modes

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

◆ PickSeriesMode

enum QwtPlotSeriesDataPicker::PickSeriesMode

Pick modes

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

Text placement options

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

◆ clicked

void QwtPlotSeriesDataPicker::clicked	(	QwtPlotSeriesDataPicker *	picker,
		const QPoint &	pos
	)

signal

Emitted when the user left-clicks on the plot canvas

参数

picker	Pointer to the picker that was clicked
pos	Screen position of the click event

注解: A double-click will trigger clicked() before doubleClicked(). Connect only one of these signals if you need to distinguish single-click from double-click.

◆ doubleClicked

void QwtPlotSeriesDataPicker::doubleClicked	(	QwtPlotSeriesDataPicker *	picker,
		const QPoint &	pos
	)

signal

Emitted when the user double-left-clicks on the plot canvas

参数

picker	Pointer to the picker that was double-clicked
pos	Screen position of the double-click event

注解: A double-click also triggers clicked() before this signal.

◆ drawFeaturePoint()

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

protectedvirtual

Draw a single feature point on the plot

This virtual method is responsible for rendering individual feature points on the QwtPlot canvas. Users can override this function to implement custom drawing styles for feature points (e.g., different shapes, colors, or visual effects).

The default implementation draws a circular point at the specified position:

Size: determined by drawFeaturePointSize()
Border: 1-pixel outline using the curve color
Fill: solid fill with the curve color darkened by 150%

参数

painter	The QPainter object for drawing operations
plot	Reference to the QwtPlot widget where drawing occurs
item	The curve item associated with this feature point
itemPoint	The coordinates of the feature point in plot coordinates

参见: drawFeaturePointSize(); setDrawFeaturePointSize(); drawAllFeaturePoints()

◆ drawFeaturePointSize()

int QwtPlotSeriesDataPicker::drawFeaturePointSize ( ) const

Get feature point size

Get drawn feature point size

返回: Size in pixels

参见: setDrawFeaturePointSize()

◆ drawRubberBand()

void QwtPlotSeriesDataPicker::drawRubberBand ( QPainter * painter ) const

overridevirtual

Draw rubber band

重载 QwtPicker .

◆ featurePoints()

QList< QwtPlotSeriesDataPicker::FeaturePoint > QwtPlotSeriesDataPicker::featurePoints ( ) const

Returns the list of feature points currently picked by the tracker

返回: Copy of the internal FeaturePoint list

注解: Call from a clicked/doubleClicked signal handler to get data at the click position

◆ interpolationMode()

QwtPlotSeriesDataPicker::InterpolationMode QwtPlotSeriesDataPicker::interpolationMode ( ) const

Get interpolation mode

返回: Current interpolation mode

参见: setInterpolationMode()

◆ isEnableDrawFeaturePoint()

bool QwtPlotSeriesDataPicker::isEnableDrawFeaturePoint ( ) const

Check if feature point drawing is enabled

返回: True if enabled

参见: setEnableDrawFeaturePoint()

◆ isEnableShowXValue()

bool QwtPlotSeriesDataPicker::isEnableShowXValue ( ) const

Check if showing X value is enabled

返回: True if enabled

参见: setEnableShowXValue()

◆ isInterpolation()

bool QwtPlotSeriesDataPicker::isInterpolation ( ) const

Check if interpolation is enabled

If interpolation is enabled, when the mouse is not on a data point, the corresponding point on the connecting line will be interpolated.

返回: True if interpolation is enabled

参见: interpolationMode()

◆ 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

Get nearest point search window size

返回: Window size (may be negative, see setNearestSearchWindowSize())

参见: setNearestSearchWindowSize()

◆ pickMode()

QwtPlotSeriesDataPicker::PickSeriesMode QwtPlotSeriesDataPicker::pickMode ( ) const

Get pick mode

Get current pick mode

返回: Current pick mode

参见: setPickMode()

◆ pickNearestPoint()

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

protectedvirtual

Get the nearest pickable point at the specified screen position (window-based fast indexing)

Get the nearest pickable point at the specified screen position

参数

plot	Plot widget
pos	Screen position
windowSize	Window size 0: No window, search entire curve Positive: Fixed window size (number of data points) Negative: Adaptive window, uses percentage of total curve points (absolute value, e.g. -5 means 5%, -10 means 10%)

返回: Pair containing the nearest plot item and corresponding data point

注解: This function accounts for parasitic plots; whether passing a host or parasitic plot, it retrieves data from all related plots.

◆ pickYValue()

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

protectedvirtual

Get all pickable Y values at the specified screen position; returns the number picked

Get all pickable Y values at a specified screen position

This method scans all pickable curves at a given screen coordinate position and collects their corresponding data points. It supports both host and parasitic plots, traversing through all related plot items regardless of their hosting relationship.

The function returns the total count of feature points successfully picked. For each picked point, the internal data structures are updated with the curve information and calculated Y values.

参数

plot	The plot widget (can be either host or parasitic plot)
pos	Screen position in widget coordinates
interpolate	Whether to perform interpolation between data points. When true, linear interpolation is applied if the position falls between two data points; otherwise, the nearest data point is selected.

返回: The number of feature points successfully picked and stored. Returns 0 if no pickable items are found at the position.

注解: This function considers both host and parasitic plots. When called with a host plot, it includes all its parasitic plots; when called with a parasitic plot, it includes its host and all siblings.

参见: featurePointList(); drawFeaturePoints(); clearFeaturePoints()

◆ setDrawFeaturePointSize()

void QwtPlotSeriesDataPicker::setDrawFeaturePointSize ( int px )

Set feature point size

Set drawn feature point size

参数

[in] px Size in pixels

参见: drawFeaturePointSize()

◆ setEnableDrawFeaturePoint()

void QwtPlotSeriesDataPicker::setEnableDrawFeaturePoint ( bool on = true )

Enable/disable feature point drawing

参数

[in] on Enable/disable

参见: isEnableDrawFeaturePoint()

◆ setEnableShowXValue()

void QwtPlotSeriesDataPicker::setEnableShowXValue ( bool on )

Whether to show X value

Enable/disable showing X value

参数

[in] on Enable/disable

参见: isEnableShowXValue()

◆ setInterpolationMode()

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

Set interpolation mode

参数

[in] mode Interpolation mode

参见: interpolationMode()

◆ setNearestSearchWindowSize()

void QwtPlotSeriesDataPicker::setNearestSearchWindowSize ( int windowSize )

Set nearest search window size

Set nearest point search window size

Window size determines the search range for nearest points, avoiding full curve traversal. Window size can be set to negative values, which will use a percentage of curve point count:

0: No window, search entire curve
Positive: Fixed window size (number of data points)
Negative: Adaptive window, uses percentage of total curve points (absolute value, e.g. -5 means 5%)
参数

[in] windowSize Window size (default is -5)

参见
nearestSearchWindowSize()

◆ setPickMode()

void QwtPlotSeriesDataPicker::setPickMode ( PickSeriesMode mode )

Set pick mode

参数

[in] mode Pick mode

参见: pickMode()

◆ setTextAlignment()

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

Set text alignment

参数

[in] al Alignment flags

参见: textAlignment()

◆ setTextArea()

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

Set text placement

Set text display area

参数

[in] t Text placement option

参见: textArea()

◆ setTextBackgroundBrush()

void QwtPlotSeriesDataPicker::setTextBackgroundBrush ( const QBrush & br )

Set text background brush

Set text area background brush

参数

[in] br Background brush

参见: textBackgroundBrush()

◆ setTextTrackerOffset()

void QwtPlotSeriesDataPicker::setTextTrackerOffset ( const QPoint & offset )

Set the tracker rectangle offset in TextFollowMouse mode

Set the offset of tracker rectangle in TextFollowMouse mode

This method configures the positional offset for the tracker rectangle when operating in TextFollowMouse mode. The offset prevents the rectangle from being positioned directly adjacent to the mouse cursor, which enhances visual clarity and prevents the tracker from obscuring the text content beneath the cursor.

参数

offset The offset value in pixels. Positive values move the tracker away from the cursor position. Recommended values are typically between 10-30 pixels for optimal user experience.

注解: The offset is applied relative to the current mouse position.

参见: textTrackerOffset(); TextPlacement

◆ setTrackerPosition()

void QwtPlotSeriesDataPicker::setTrackerPosition ( const QPoint & pos )

overridevirtual

Manually set position

重载 QwtPicker .

◆ textAlignment()

Qt::Alignment QwtPlotSeriesDataPicker::textAlignment ( ) const

Get text alignment

返回: Alignment flags

参见: setTextAlignment()

◆ textArea()

QwtPlotSeriesDataPicker::TextPlacement QwtPlotSeriesDataPicker::textArea ( ) const

Get text placement

Get text display position

返回: Text placement option

参见: setTextArea()

◆ textBackgroundBrush()

QBrush QwtPlotSeriesDataPicker::textBackgroundBrush ( ) const

Get text background brush

Get text area background brush

返回: Background brush

参见: setTextBackgroundBrush()

◆ textTrackerOffset()

QPoint QwtPlotSeriesDataPicker::textTrackerOffset ( ) const

Get the current tracker rectangle offset in TextFollowMouse mode

This method returns the current offset value used to position the tracker rectangle relative to the mouse cursor in TextFollowMouse mode. The offset ensures that the tracker rectangle is not placed directly under the mouse, preventing visual obstruction of the underlying content.

返回: The current offset as a QPoint, where x and y represent the horizontal and vertical offsets in pixels respectively.

注解: A return value of QPoint(0, 0) indicates no offset is applied.

参见: setTextTrackerOffset(); TextPlacement

◆ trackerRect()

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

overridevirtual

Keep rectangle at top

重载 QwtPicker .

◆ trackerText()

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

overridevirtual

Top rectangle text

重载 QwtPicker .

◆ widgetMouseDoubleClickEvent()

void QwtPlotSeriesDataPicker::widgetMouseDoubleClickEvent ( QMouseEvent * event )

overrideprotectedvirtual

Handle mouse double-click events on the widget

Emits doubleClicked() for left-button double-clicks. A double-click also triggers clicked() (via widgetMousePressEvent) before this signal. Then delegates to base class.

参数

event The mouse double-click event

重载 QwtPicker .

◆ widgetMousePressEvent()

void QwtPlotSeriesDataPicker::widgetMousePressEvent ( QMouseEvent * event )

overrideprotectedvirtual

Handle mouse press events on the widget

Emits clicked() for left-button presses, after updating feature points at the press position to ensure featurePoints() returns accurate data. Then delegates to base class for normal picker transition handling.

参数

event The mouse press event

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

信号

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

◆ clicked

◆ doubleClicked

◆ drawFeaturePoint()

◆ drawFeaturePointSize()

◆ drawRubberBand()

◆ featurePoints()

◆ 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()

◆ widgetMouseDoubleClickEvent()

◆ widgetMousePressEvent()