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

#include <qwt_plot_picker.h>

Inheritance diagram for QwtPlotPicker:

Signals
void	selected (const QPointF &pos)

void	selected (const QRectF &rect)

void	selected (const QVector< QPointF > &pa)

void	appended (const QPointF &pos)

void	moved (const QPointF &pos)

Signals inherited from QwtPicker
void	activated (bool on)

void	selected (const QPolygon &polygon)

void	appended (const QPoint &pos)

void	moved (const QPoint &pos)

void	removed (const QPoint &pos)

void	changed (const QPolygon &selection)

Public Member Functions
	QwtPlotPicker (QWidget *canvas)
	Create a plot picker.

virtual	~QwtPlotPicker ()
	Destructor.

	QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, QWidget *)

	QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)

virtual void	setAxes (QwtAxisId xAxisId, QwtAxisId yAxisId)

QwtAxisId	xAxis () const
	Return x axis.

QwtAxisId	yAxis () const
	Return y axis.

QwtPlot *	plot ()

const QwtPlot *	plot () const

QWidget *	canvas ()

const QWidget *	canvas () const

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

	QwtPicker (RubberBand rubberBand, DisplayMode trackerMode, QWidget *)

virtual	~QwtPicker ()
	Destructor.

void	setStateMachine (QwtPickerMachine *)

const QwtPickerMachine *	stateMachine () const

QwtPickerMachine *	stateMachine ()

void	setRubberBand (RubberBand)

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 &)

QPen	rubberBandPen () const

void	setTrackerPen (const QPen &)

QPen	trackerPen () const

void	setTrackerFont (const QFont &)

QFont	trackerFont () const

bool	isEnabled () const

bool	isActive () const

virtual bool	eventFilter (QObject , QEvent ) 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

virtual void	drawRubberBand (QPainter *) const

virtual void	drawTracker (QPainter *) const

virtual QRegion	trackerMask () const

virtual QRegion	rubberBandMask () const

QPoint	trackerPosition () const

virtual QRect	trackerRect (const QFont &) const

QPolygon	selection () const

Public Member Functions inherited from QwtEventPattern
	QwtEventPattern ()

virtual	~QwtEventPattern ()
	Destructor.

void	initMousePattern (int numButtons)

void	initKeyPattern ()

void	setMousePattern (MousePatternCode, Qt::MouseButton button, Qt::KeyboardModifiers=Qt::NoModifier)

void	setKeyPattern (KeyPatternCode, int key, Qt::KeyboardModifiers modifiers=Qt::NoModifier)

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
QRectF	scaleRect () const

QRectF	invTransform (const QRect &) const

QRect	transform (const QRectF &) const

QPointF	invTransform (const QPoint &) const

QPoint	transform (const QPointF &) const

virtual QwtText	trackerText (const QPoint &) const override

virtual QwtText	trackerTextF (const QPointF &) const
	Translate a position into a position string.

virtual void	move (const QPoint &) override

virtual void	append (const QPoint &) override

virtual bool	end (bool ok=true) override

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

virtual void	transition (const QEvent *)

virtual void	begin ()

virtual void	remove ()

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

virtual void	reset ()

virtual void	widgetMousePressEvent (QMouseEvent *)

virtual void	widgetMouseReleaseEvent (QMouseEvent *)

virtual void	widgetMouseDoubleClickEvent (QMouseEvent *)

virtual void	widgetMouseMoveEvent (QMouseEvent *)

virtual void	widgetWheelEvent (QWheelEvent *)

virtual void	widgetKeyPressEvent (QKeyEvent *)

virtual void	widgetKeyReleaseEvent (QKeyEvent *)

virtual void	widgetEnterEvent (QEvent *)

virtual void	widgetLeaveEvent (QEvent *)

virtual void	stretchSelection (const QSize &oldSize, const QSize &newSize)

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

const QwtWidgetOverlay *	rubberBandOverlay () const

const QwtWidgetOverlay *	trackerOverlay () const

const QPolygon &	pickedPoints () const

QRect	trackerRect (const QSize &) const

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 }

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

enum	ResizeMode { Stretch , KeepSize }

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)
	En/disable the picker.

Detailed Description

QwtPlotPicker provides selections on a plot canvas.

QwtPlotPicker is a QwtPicker tailored for selections on a plot canvas. It is set to a x-Axis and y-Axis and translates all pixel coordinates into this coordinate system.

Definition at line 33 of file qwt_plot_picker.h.

Constructor & Destructor Documentation

◆ QwtPlotPicker() [1/3]

QwtPlotPicker::QwtPlotPicker ( QWidget * canvas )

explicit

Create a plot picker.

The picker is set to those x- and y-axis of the plot that are enabled. If both or no x-axis are enabled, the picker is set to QwtAxis::XBottom. If both or no y-axis are enabled, it is set to QwtAxis::YLeft.

Parameters

canvas Plot canvas to observe, also the parent object

See also: QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()

Definition at line 43 of file qwt_plot_picker.cpp.

◆ ~QwtPlotPicker()

QwtPlotPicker::~QwtPlotPicker ( )

virtual

Destructor.

Definition at line 108 of file qwt_plot_picker.cpp.

◆ QwtPlotPicker() [2/3]

QwtPlotPicker::QwtPlotPicker	(	QwtAxisId	xAxisId,
		QwtAxisId	yAxisId,
		QWidget *	canvas )

explicit

Create a plot picker

Parameters

xAxisId	X axis of the picker
yAxisId	Y axis of the picker
canvas	Plot canvas to observe, also the parent object

See also: QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()

Definition at line 76 of file qwt_plot_picker.cpp.

◆ QwtPlotPicker() [3/3]

QwtPlotPicker::QwtPlotPicker	(	QwtAxisId	xAxisId,
		QwtAxisId	yAxisId,
		RubberBand	rubberBand,
		DisplayMode	trackerMode,
		QWidget *	canvas )

explicit

Create a plot picker

Parameters

xAxisId	X axis of the picker
yAxisId	Y axis of the picker
rubberBand	Rubber band style
trackerMode	Tracker mode
canvas	Plot canvas to observe, also the parent object

See also: QwtPicker, QwtPicker::setSelectionFlags(), QwtPicker::setRubberBand(), QwtPicker::setTrackerMode; QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()

Definition at line 98 of file qwt_plot_picker.cpp.

Member Function Documentation

◆ append()

void QwtPlotPicker::append ( const QPoint & pos )

overrideprotectedvirtual

Append a point to the selection and update rubber band 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.

Definition at line 251 of file qwt_plot_picker.cpp.

◆ appended

void QwtPlotPicker::appended ( const QPointF & pos )

signal

A signal emitted when a point has been appended to the selection

Parameters

pos	Position of the appended point.

See also: append(). moved()

◆ canvas() [1/2]

QWidget * QwtPlotPicker::canvas ( )

Returns: Observed plot canvas

Definition at line 114 of file qwt_plot_picker.cpp.

◆ canvas() [2/2]

const QWidget * QwtPlotPicker::canvas ( ) const

Returns: Observed plot canvas

Definition at line 120 of file qwt_plot_picker.cpp.

◆ end()

bool QwtPlotPicker::end ( bool ok = true )

overrideprotectedvirtual

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 has been accepted, false otherwise

Reimplemented from QwtPicker.

Reimplemented in QwtPlotZoomer.

Definition at line 280 of file qwt_plot_picker.cpp.

◆ invTransform() [1/2]

QPointF QwtPlotPicker::invTransform ( const QPoint & pos ) const

protected

Translate a point from pixel into plot coordinates

Returns: Point in plot coordinates

See also: transform()

Definition at line 367 of file qwt_plot_picker.cpp.

◆ invTransform() [2/2]

QRectF QwtPlotPicker::invTransform ( const QRect & rect ) const

protected

Translate a rectangle from pixel into plot coordinates

Returns: Rectangle in plot coordinates

See also: transform()

Definition at line 341 of file qwt_plot_picker.cpp.

◆ move()

void QwtPlotPicker::move ( const QPoint & pos )

overrideprotectedvirtual

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.

Definition at line 266 of file qwt_plot_picker.cpp.

◆ moved

void QwtPlotPicker::moved ( const QPointF & pos )

signal

A signal emitted whenever the last appended point of the selection has been moved.

Parameters

pos	Position of the moved last point of the selection.

See also: move(), appended()

◆ plot() [1/2]

QwtPlot * QwtPlotPicker::plot ( )

Returns: Plot widget, containing the observed plot canvas

Definition at line 126 of file qwt_plot_picker.cpp.

◆ plot() [2/2]

const QwtPlot * QwtPlotPicker::plot ( ) const

Returns: Plot widget, containing the observed plot canvas

Definition at line 136 of file qwt_plot_picker.cpp.

◆ scaleRect()

QRectF QwtPlotPicker::scaleRect ( ) const

protected

Returns: Normalized bounding rectangle of the axes

See also: QwtPlot::autoReplot(), QwtPlot::replot().

Definition at line 149 of file qwt_plot_picker.cpp.

◆ selected [1/3]

void QwtPlotPicker::selected ( const QPointF & pos )

signal

A signal emitted in case of QwtPickerMachine::PointSelection.

Parameters

pos	Selected point

◆ selected [2/3]

void QwtPlotPicker::selected ( const QRectF & rect )

signal

A signal emitted in case of QwtPickerMachine::RectSelection.

Parameters

rect	Selected rectangle

◆ selected [3/3]

void QwtPlotPicker::selected ( const QVector< QPointF > & pa )

signal

A signal emitting the selected points, at the end of a selection.

Parameters

pa	Selected points

◆ setAxes()

void QwtPlotPicker::setAxes	(	QwtAxisId	xAxisId,
		QwtAxisId	yAxisId )

virtual

Set the x and y axes of the picker

Parameters

xAxisId	X axis
yAxisId	Y axis

Reimplemented in QwtPlotZoomer.

Definition at line 172 of file qwt_plot_picker.cpp.

◆ trackerText()

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

overrideprotectedvirtual

Translate a pixel position into a position string

Parameters

pos	Position in pixel coordinates

Returns: Position string

Reimplemented from QwtPicker.

Definition at line 203 of file qwt_plot_picker.cpp.

◆ trackerTextF()

QwtText QwtPlotPicker::trackerTextF ( const QPointF & pos ) const

protectedvirtual

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

Definition at line 223 of file qwt_plot_picker.cpp.

◆ transform() [1/2]

QPoint QwtPlotPicker::transform ( const QPointF & pos ) const

protected

Translate a point from plot into pixel coordinates

Returns: Point in pixel coordinates

See also: invTransform()

Definition at line 383 of file qwt_plot_picker.cpp.

◆ transform() [2/2]

QRect QwtPlotPicker::transform ( const QRectF & rect ) const

protected

Translate a rectangle from plot into pixel coordinates

Returns: Rectangle in pixel coordinates

See also: invTransform()

Definition at line 354 of file qwt_plot_picker.cpp.

◆ xAxis()

QwtAxisId QwtPlotPicker::xAxis ( ) const

Return x axis.

Definition at line 186 of file qwt_plot_picker.cpp.

◆ yAxis()

QwtAxisId QwtPlotPicker::yAxis ( ) const

Return y axis.

Definition at line 192 of file qwt_plot_picker.cpp.

Signals

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotPicker() [1/3]

◆ ~QwtPlotPicker()

◆ QwtPlotPicker() [2/3]

◆ QwtPlotPicker() [3/3]

Member Function Documentation

◆ append()

◆ appended

◆ canvas() [1/2]

◆ canvas() [2/2]

◆ end()

◆ invTransform() [1/2]

◆ invTransform() [2/2]

◆ move()

◆ moved

◆ plot() [1/2]

◆ plot() [2/2]

◆ scaleRect()

◆ selected [1/3]

◆ selected [2/3]

◆ selected [3/3]

◆ setAxes()

◆ trackerText()

◆ trackerTextF()

◆ transform() [1/2]

◆ transform() [2/2]

◆ xAxis()

◆ yAxis()