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. More...

virtual	~QwtPlotPicker ()
	Destructor.

	QwtPlotPicker (int xAxis, int yAxis, QWidget *)

	QwtPlotPicker (int xAxis, int yAxis, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)

virtual void	setAxis (int xAxis, int yAxis)

int	xAxis () const
	Return x axis.

int	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. More...

DisplayMode	trackerMode () const

void	setResizeMode (ResizeMode)
	Set the resize mode. More...

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 )
	Event filter. More...

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	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 keyCode, Qt::KeyboardModifiers modifierCodes=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. More...

bool	keyMatch (KeyPatternCode, const QKeyEvent *) const
	Compare a key event with an event pattern. More...

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

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

virtual void	move (const QPoint &)

virtual void	append (const QPoint &)

virtual bool	end (bool ok=true)

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

virtual void	transition (const QEvent *)

virtual void	begin ()

virtual void	remove ()

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

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

Protected Member Functions inherited from QwtEventPattern
virtual bool	mouseMatch (const MousePattern &, const QMouseEvent *) const
	Compare a mouse event with an event pattern. More...

virtual bool	keyMatch (const KeyPattern &, const QKeyEvent *) const
	Compare a key event with an event pattern. More...

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. More...

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.

Constructor & Destructor Documentation

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 QwtPlot::xBottom. If both or no y-axis are enabled, it is set to QwtPlot::yLeft.

Parameters

canvas Plot canvas to observe, also the parent object

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

QwtPlotPicker::QwtPlotPicker	(	int	xAxis,
		int	yAxis,
		QWidget *	canvas
	)

explicit

Create a plot picker

Parameters

xAxis	Set the x axis of the picker
yAxis	Set the y axis of the picker
canvas	Plot canvas to observe, also the parent object

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

QwtPlotPicker::QwtPlotPicker	(	int	xAxis,
		int	yAxis,
		RubberBand	rubberBand,
		DisplayMode	trackerMode,
		QWidget *	canvas
	)

explicit

Create a plot picker

Parameters

xAxis	X axis of the picker
yAxis	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()

Member Function Documentation

void QwtPlotPicker::append ( const QPoint & pos )

protectedvirtual

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.

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()

QWidget * QwtPlotPicker::canvas ( )

Returns: Observed plot canvas

const QWidget * QwtPlotPicker::canvas ( ) const

Returns: Observed plot canvas

bool QwtPlotPicker::end ( bool ok = true )

protectedvirtual

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.

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

protected

Translate a rectangle from pixel into plot coordinates

Returns: Rectangle in plot coordinates

See also: transform()

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

protected

Translate a point from pixel into plot coordinates

Returns: Point in plot coordinates

See also: transform()

void QwtPlotPicker::move ( const QPoint & pos )

protectedvirtual

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.

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()

QwtPlot * QwtPlotPicker::plot ( )

Returns: Plot widget, containing the observed plot canvas

const QwtPlot * QwtPlotPicker::plot ( ) const

Returns: Plot widget, containing the observed plot canvas

QRectF QwtPlotPicker::scaleRect ( ) const

protected

Returns: Normalized bounding rectangle of the axes

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

void QwtPlotPicker::selected ( const QPointF & pos )

signal

A signal emitted in case of QwtPickerMachine::PointSelection.

Parameters

pos	Selected point

void QwtPlotPicker::selected ( const QRectF & rect )

signal

A signal emitted in case of QwtPickerMachine::RectSelection.

Parameters

rect	Selected rectangle

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

signal

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

Parameters

pa	Selected points

void QwtPlotPicker::setAxis	(	int	xAxis,
		int	yAxis
	)

virtual

Set the x and y axes of the picker

Parameters

xAxis	X axis
yAxis	Y axis

Reimplemented in QwtPlotZoomer.

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

protectedvirtual

Translate a pixel position into a position string

Parameters

pos	Position in pixel coordinates

Returns: Position string

Reimplemented from QwtPicker.

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

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

protected

Translate a rectangle from plot into pixel coordinates

Returns: Rectangle in pixel coordinates

See also: invTransform()

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

protected

Translate a point from plot into pixel coordinates

Returns: Point in pixel coordinates

See also: invTransform()

Signals

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation