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

#include <qwt_plot_series_data_picker.h>

Inheritance diagram for QwtPlotSeriesDataPicker:

Classes
struct	FeaturePoint
	Feature point structure. More...

class	PrivateData

Public Types
enum	PickSeriesMode { PickYValue , PickNearestPoint }
	Pick modes. More...

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

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

Signals
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.

Signals inherited from 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 Member Functions
	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 Member Functions inherited from 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 Member Functions inherited from 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 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 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 Member Functions
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 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	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 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)
	Enable or disable the picker.

Properties inherited from QwtPicker
bool	isEnabled

ResizeMode	resizeMode

DisplayMode	trackerMode

QPen	trackerPen

QFont	trackerFont

RubberBand	rubberBand

QPen	rubberBandPen

Detailed Description

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.

Member Enumeration Documentation

◆ InterpolationMode

enum QwtPlotSeriesDataPicker::InterpolationMode

Interpolation modes.

Enumerator
NoInterpolation	No interpolation, use nearest data point.
LinearInterpolation	Linear interpolation between adjacent data points.

◆ PickSeriesMode

enum QwtPlotSeriesDataPicker::PickSeriesMode

Pick modes.

Enumerator
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.

Enumerator
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.

Member Function Documentation

◆ clicked

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

signal

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

Parameters

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

Note: 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.

Parameters

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

Note: 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%

Parameters

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

See also: drawFeaturePointSize(); setDrawFeaturePointSize(); drawAllFeaturePoints()

◆ drawFeaturePointSize()

int QwtPlotSeriesDataPicker::drawFeaturePointSize ( ) const

Get feature point size.

Get drawn feature point size.

Returns: Size in pixels

See also: setDrawFeaturePointSize()

◆ drawRubberBand()

void QwtPlotSeriesDataPicker::drawRubberBand ( QPainter * painter ) const

overridevirtual

Draw rubber band.

Reimplemented from QwtPicker.

◆ featurePoints()

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

Returns the list of feature points currently picked by the tracker.

Returns: Copy of the internal FeaturePoint list

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

◆ interpolationMode()

QwtPlotSeriesDataPicker::InterpolationMode QwtPlotSeriesDataPicker::interpolationMode ( ) const

Get interpolation mode.

Returns: Current interpolation mode

See also: setInterpolationMode()

◆ isEnableDrawFeaturePoint()

bool QwtPlotSeriesDataPicker::isEnableDrawFeaturePoint ( ) const

Check if feature point drawing is enabled.

Returns: True if enabled

See also: setEnableDrawFeaturePoint()

◆ isEnableShowXValue()

bool QwtPlotSeriesDataPicker::isEnableShowXValue ( ) const

Check if showing X value is enabled.

Returns: True if enabled

See also: 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.

Returns: True if interpolation is enabled

See also: interpolationMode()

◆ move()

void QwtPlotSeriesDataPicker::move ( const QPoint & pos )

overrideprotectedvirtual

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

Get nearest search window size.

Get nearest point search window size.

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

See also: setNearestSearchWindowSize()

◆ pickMode()

QwtPlotSeriesDataPicker::PickSeriesMode QwtPlotSeriesDataPicker::pickMode ( ) const

Get pick mode.

Get current pick mode.

Returns: Current pick mode

See also: 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.

Parameters

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%)

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

Note: 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.

Parameters

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.

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

Note: 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.

See also: featurePointList(); drawFeaturePoints(); clearFeaturePoints()

◆ setDrawFeaturePointSize()

void QwtPlotSeriesDataPicker::setDrawFeaturePointSize ( int px )

Set feature point size.

Set drawn feature point size.

Parameters

[in] px Size in pixels

See also: drawFeaturePointSize()

◆ setEnableDrawFeaturePoint()

void QwtPlotSeriesDataPicker::setEnableDrawFeaturePoint ( bool on = true )

Enable/disable feature point drawing.

Parameters

[in] on Enable/disable

See also: isEnableDrawFeaturePoint()

◆ setEnableShowXValue()

void QwtPlotSeriesDataPicker::setEnableShowXValue ( bool on )

Whether to show X value.

Enable/disable showing X value.

Parameters

[in] on Enable/disable

See also: isEnableShowXValue()

◆ setInterpolationMode()

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

Set interpolation mode.

Parameters

[in] mode Interpolation mode

See also: 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%)
Parameters

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

See also
nearestSearchWindowSize()

◆ setPickMode()

void QwtPlotSeriesDataPicker::setPickMode ( PickSeriesMode mode )

Set pick mode.

Parameters

[in] mode Pick mode

See also: pickMode()

◆ setTextAlignment()

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

Set text alignment.

Parameters

[in] al Alignment flags

See also: textAlignment()

◆ setTextArea()

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

Set text placement.

Set text display area.

Parameters

[in] t Text placement option

See also: textArea()

◆ setTextBackgroundBrush()

void QwtPlotSeriesDataPicker::setTextBackgroundBrush ( const QBrush & br )

Set text background brush.

Set text area background brush.

Parameters

[in] br Background brush

See also: 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.

Parameters

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.

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

See also: textTrackerOffset(); TextPlacement

◆ setTrackerPosition()

void QwtPlotSeriesDataPicker::setTrackerPosition ( const QPoint & pos )

overridevirtual

Manually set position.

Reimplemented from QwtPicker.

◆ textAlignment()

Qt::Alignment QwtPlotSeriesDataPicker::textAlignment ( ) const

Get text alignment.

Returns: Alignment flags

See also: setTextAlignment()

◆ textArea()

QwtPlotSeriesDataPicker::TextPlacement QwtPlotSeriesDataPicker::textArea ( ) const

Get text placement.

Get text display position.

Returns: Text placement option

See also: setTextArea()

◆ textBackgroundBrush()

QBrush QwtPlotSeriesDataPicker::textBackgroundBrush ( ) const

Get text background brush.

Get text area background brush.

Returns: Background brush

See also: 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.

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

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

See also: setTextTrackerOffset(); TextPlacement

◆ trackerRect()

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

overridevirtual

Keep rectangle at top.

Reimplemented from QwtPicker.

◆ trackerText()

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

overridevirtual

Top rectangle text.

Reimplemented from 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.

Parameters

event The mouse double-click event

Reimplemented from 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.

Parameters

event The mouse press event

Reimplemented from QwtPicker.

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

/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

Classes

Public Types

Signals

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ InterpolationMode

◆ PickSeriesMode

◆ TextPlacement

Member Function Documentation

◆ 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()