QwtPolarPicker provides selections on a plot canvas. More...

#include <qwt_polar_picker.h>

Inheritance diagram for QwtPolarPicker:

Classes
class	PrivateData

Signals
void	selected (const QwtPointPolar &pos)
	A signal emitted in case of selectionFlags() & PointSelection 当 selectionFlags() & PointSelection 时发出的信号

void	selected (const QVector< QwtPointPolar > &points)
	A signal emitting the selected points, at the end of a selection 在选择结束时发出选中点的信号

void	appended (const QwtPointPolar &pos)
	A signal emitted when a point has been appended to the selection 当点被追加到选择时发出的信号

void	moved (const QwtPointPolar &pos)
	A signal emitted whenever the last appended point of the selection has been moved 当选择的最后一个追加点被移动时发出的信号

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
	QwtPolarPicker (QwtPolarCanvas *)
	Constructor.

virtual	~QwtPolarPicker ()
	Destructor.

	QwtPolarPicker (RubberBand rubberBand, DisplayMode trackerMode, QwtPolarCanvas *)
	Constructor with rubber band and tracker mode.

QwtPolarPlot *	plot ()
	Get the plot.

const QwtPolarPlot *	plot () const
	Get the plot (const version)

QwtPolarCanvas *	canvas ()
	Get the canvas.

const QwtPolarCanvas *	canvas () const
	Get the canvas (const version)

virtual QRect	pickRect () const
	Get the pick rectangle.

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

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.

virtual QRect	trackerRect (const QFont &) const
	Calculate the bounding rectangle for the tracker text from the current position of the tracker.

virtual void	setTrackerPosition (const QPoint &pos)
	Set the tracker position manually.

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
QwtPointPolar	invTransform (const QPoint &) const
	Inverse transform a point.

virtual QwtText	trackerText (const QPoint &) const override
	Get the tracker text.

virtual QwtText	trackerTextPolar (const QwtPointPolar &) const
	Get the tracker text for a polar point.

virtual void	move (const QPoint &) override
	Move the selection.

virtual void	append (const QPoint &) override
	Append a point to the selection.

virtual bool	end (bool ok=true) override
	End the selection.

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

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
	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 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...

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

QwtPolarPicker provides selections on a plot canvas.

Constructor & Destructor Documentation

◆ QwtPolarPicker() [1/2]

QwtPolarPicker::QwtPolarPicker ( QwtPolarCanvas * canvas )

explicit

Constructor.

Create a polar plot picker.

◆ ~QwtPolarPicker()

QwtPolarPicker::~QwtPolarPicker ( )

virtual

Destructor.

Destructor

.

◆ QwtPolarPicker() [2/2]

QwtPolarPicker::QwtPolarPicker	(	RubberBand	rubberBand,
		DisplayMode	trackerMode,
		QwtPolarCanvas *	canvas
	)

explicit

Constructor with rubber band and tracker mode.

Create a plot picker with rubber band and tracker mode.

Member Function Documentation

◆ append()

void QwtPolarPicker::append ( const QPoint & pos )

overrideprotectedvirtual

Append a point to the selection.

Append a point to the selection and update rubberband and tracker.

Parameters

pos	Additional point

See also: isActive, begin(), end(), move(), appended()

Note: The appended(const QPoint &), appended(const QDoublePoint &) signals are emitted.

Reimplemented from QwtPicker.

◆ appended

void QwtPolarPicker::appended ( const QwtPointPolar & pos )

signal

A signal emitted when a point has been appended to the selection 当点被追加到选择时发出的信号

Parameters

pos	Position of the appended point / 追加点的位置

See also: append(), moved()

◆ canvas() [1/2]

QwtPolarCanvas * QwtPolarPicker::canvas ( )

Get the canvas.

Get the observed plot canvas.

◆ canvas() [2/2]

const QwtPolarCanvas * QwtPolarPicker::canvas ( ) const

Get the canvas (const version)

Get the observed plot canvas (const version)

◆ end()

bool QwtPolarPicker::end ( bool ok = true )

overrideprotectedvirtual

End the selection.

Close a selection setting the state to inactive.

Parameters

ok	If true, complete the selection and emit selected signals otherwise discard the selection.

Returns: true if the selection is accepted, false otherwise

Reimplemented from QwtPicker.

◆ invTransform()

QwtPointPolar QwtPolarPicker::invTransform ( const QPoint & pos ) const

protected

Inverse transform a point.

Translate a point from widget into plot coordinates.

Parameters

pos	Point in widget coordinates of the plot canvas

Returns: Point in plot coordinates

See also: transform(), canvas()

◆ move()

void QwtPolarPicker::move ( const QPoint & pos )

overrideprotectedvirtual

Move the selection.

Move the last point of the selection.

Parameters

pos	New position

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

Note: The moved(const QPoint &), moved(const QDoublePoint &) signals are emitted.

Reimplemented from QwtPicker.

◆ moved

void QwtPolarPicker::moved ( const QwtPointPolar & pos )

signal

A signal emitted whenever the last appended point of the selection has been moved 当选择的最后一个追加点被移动时发出的信号

Parameters

pos	Position of the moved last point of the selection / 移动的最后一个点的位置

See also: move(), appended()

◆ pickRect()

QRect QwtPolarPicker::pickRect ( ) const

virtual

Get the pick rectangle.

Get the bounding rectangle of the region where picking is supported.

◆ plot() [1/2]

QwtPolarPlot * QwtPolarPicker::plot ( )

Get the plot.

Get the plot widget containing the observed plot canvas.

◆ plot() [2/2]

const QwtPolarPlot * QwtPolarPicker::plot ( ) const

Get the plot (const version)

Get the plot widget containing the observed plot canvas (const version)

◆ selected [1/2]

void QwtPolarPicker::selected ( const QVector< QwtPointPolar > & points )

signal

A signal emitting the selected points, at the end of a selection 在选择结束时发出选中点的信号

Parameters

points Selected points / 选中的点

◆ selected [2/2]

void QwtPolarPicker::selected ( const QwtPointPolar & pos )

signal

A signal emitted in case of selectionFlags() & PointSelection 当 selectionFlags() & PointSelection 时发出的信号

Parameters

pos	Selected point / 选中的点

◆ trackerText()

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

overrideprotectedvirtual

Get the tracker text.

Translate a pixel position into a position string.

Parameters

pos	Position in pixel coordinates

Returns: Position string

Reimplemented from QwtPicker.

◆ trackerTextPolar()

QwtText QwtPolarPicker::trackerTextPolar ( const QwtPointPolar & pos ) const

protectedvirtual

Get the tracker text for a polar point.

Translate a position into a position string.

In case of HLineRubberBand the label is the value of the y position, in case of VLineRubberBand the value of the x position. Otherwise the label contains x and y position separated by a ',' .

The format for the double to string conversion is "%.4f".

Parameters

pos Position

Returns: Position string

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

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

Classes

Signals

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPolarPicker() [1/2]

◆ ~QwtPolarPicker()

◆ QwtPolarPicker() [2/2]

Member Function Documentation

◆ append()

◆ appended

◆ canvas() [1/2]

◆ canvas() [2/2]

◆ end()

◆ invTransform()

◆ move()

◆ moved

◆ pickRect()

◆ plot() [1/2]

◆ plot() [2/2]

◆ selected [1/2]

◆ selected [2/2]

◆ trackerText()

◆ trackerTextPolar()