QwtPlotPicker Class Reference

#include <qwt_plot_picker.h>

Inherits QwtPicker.

Inherited by QwtPlotZoomer.

List of all members.

Public Types
enum	DisplayMode {   AlwaysOff,   AlwaysOn,   ActiveOnly }
enum	KeyPatternCode {   KeySelect1,   KeySelect2,   KeyAbort,   KeyLeft,   KeyRight,   KeyUp,   KeyDown,   KeyRedo,   KeyUndo,   KeyHome,   KeyPatternCount }
enum	MousePatternCode {   MouseSelect1,   MouseSelect2,   MouseSelect3,   MouseSelect4,   MouseSelect5,   MouseSelect6,   MousePatternCount }
enum	ResizeMode {   Stretch,   KeepSize }
enum	RubberBand {   NoRubberBand = 0,   HLineRubberBand,   VLineRubberBand,   CrossRubberBand,   RectRubberBand,   EllipseRubberBand,   PolygonRubberBand,   UserRubberBand = 100 }
Public Slots
void	setEnabled (bool)
Signals
void	activated (bool on)
void	appended (const QPointF &pos)
void	appended (const QPoint &pos)
void	changed (const QPolygon &selection)
void	moved (const QPointF &pos)
void	moved (const QPoint &pos)
void	removed (const QPoint &pos)
void	selected (const QPointF &pos)
void	selected (const QRectF &rect)
void	selected (const QVector< QPointF > &pa)
void	selected (const QPolygon &polygon)
Public Member Functions
QwtPlotCanvas *	canvas ()
const QwtPlotCanvas *	canvas () const
virtual void	drawRubberBand (QPainter *) const
virtual void	drawTracker (QPainter *) const
virtual bool	eventFilter (QObject *, QEvent *)
void	initKeyPattern ()
void	initMousePattern (int numButtons)
bool	isActive () const
bool	isEnabled () const
bool	keyMatch (uint pattern, const QKeyEvent *) const
const QVector< KeyPattern > &	keyPattern () const
QVector< KeyPattern > &	keyPattern ()
bool	mouseMatch (uint pattern, const QMouseEvent *) const
const QVector< MousePattern > &	mousePattern () const
QVector< MousePattern > &	mousePattern ()
QWidget *	parentWidget ()
const QWidget *	parentWidget () const
virtual QRect	pickRect () const
QwtPlot *	plot ()
const QwtPlot *	plot () const
	QwtPlotPicker (QwtPlotCanvas *)
	QwtPlotPicker (int xAxis, int yAxis, QwtPlotCanvas *)
	QwtPlotPicker (int xAxis, int yAxis, RubberBand rubberBand, DisplayMode trackerMode, QwtPlotCanvas *)
ResizeMode	resizeMode () const
RubberBand	rubberBand () const
QPen	rubberBandPen () const
QPolygon	selection () const
virtual void	setAxis (int xAxis, int yAxis)
void	setKeyPattern (uint pattern, int key, int state=Qt::NoButton)
void	setKeyPattern (const QVector< KeyPattern > &)
void	setMousePattern (uint pattern, int button, int state=Qt::NoButton)
void	setMousePattern (const QVector< MousePattern > &)
void	setResizeMode (ResizeMode)
void	setRubberBand (RubberBand)
void	setRubberBandPen (const QPen &)
void	setStateMachine (QwtPickerMachine *)
void	setTrackerFont (const QFont &)
void	setTrackerMode (DisplayMode)
void	setTrackerPen (const QPen &)
const QwtPickerMachine *	stateMachine () const
QwtPickerMachine *	stateMachine ()
QFont	trackerFont () const
DisplayMode	trackerMode () const
QPen	trackerPen () const
QPoint	trackerPosition () const
virtual QRect	trackerRect (const QFont &) const
int	xAxis () const
int	yAxis () const
virtual	~QwtPlotPicker ()
Protected Member Functions
virtual bool	accept (QPolygon &) const
virtual QPolygon	adjustedPoints (const QPolygon &) const
virtual void	append (const QPoint &)
virtual void	begin ()
virtual bool	end (bool ok=true)
QRectF	invTransform (const QRect &) const
QPointF	invTransform (const QPoint &) const
virtual bool	keyMatch (const KeyPattern &, const QKeyEvent *) const
virtual bool	mouseMatch (const MousePattern &, const QMouseEvent *) const
virtual void	move (const QPoint &)
const QPolygon &	pickedPoints () const
virtual void	remove ()
virtual void	reset ()
const QWidget *	rubberBandWidget () const
QRectF	scaleRect () const
virtual void	stretchSelection (const QSize &oldSize, const QSize &newSize)
virtual QwtText	trackerText (const QPoint &) const
virtual QwtText	trackerTextF (const QPointF &) const
const QWidget *	trackerWidget () const
QRect	transform (const QRectF &) const
QPoint	transform (const QPointF &) const
virtual void	transition (const QEvent *)
virtual void	updateDisplay ()
virtual void	widgetEnterEvent (QEvent *)
virtual void	widgetKeyPressEvent (QKeyEvent *)
virtual void	widgetKeyReleaseEvent (QKeyEvent *)
virtual void	widgetLeaveEvent (QEvent *)
virtual void	widgetMouseDoubleClickEvent (QMouseEvent *)
virtual void	widgetMouseMoveEvent (QMouseEvent *)
virtual void	widgetMousePressEvent (QMouseEvent *)
virtual void	widgetMouseReleaseEvent (QMouseEvent *)
virtual void	widgetWheelEvent (QWheelEvent *)

---

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 coodinate system.

---

Member Enumeration Documentation

enum QwtPicker::DisplayMode [inherited]

Display mode.

See also:

setTrackerMode(), trackerMode(), isActive()

Enumerator:

AlwaysOff	Display never.
AlwaysOn	Display always.
ActiveOnly	Display only when the selection is active.

enum QwtEventPattern::KeyPatternCode [inherited]

Symbolic keyboard input codes.

Default initialization:

• KeySelect1
  Qt::Key_Return
• KeySelect2
  Qt::Key_Space
• KeyAbort
  Qt::Key_Escape

• KeyLeft
  Qt::Key_Left
• KeyRight
  Qt::Key_Right
• KeyUp
  Qt::Key_Up
• KeyDown
  Qt::Key_Down

• KeyUndo
  Qt::Key_Minus
• KeyRedo
  Qt::Key_Plus
• KeyHome
  Qt::Key_Escape

enum QwtEventPattern::MousePatternCode [inherited]

Symbolic mouse input codes.

The default initialization for 3 button mice is:

• MouseSelect1
  Qt::LeftButton
• MouseSelect2
  Qt::RightButton
• MouseSelect3
  Qt::MidButton
• MouseSelect4
  Qt::LeftButton + Qt::ShiftButton
• MouseSelect5
  Qt::RightButton + Qt::ShiftButton
• MouseSelect6
  Qt::MidButton + Qt::ShiftButton

The default initialization for 2 button mice is:

• MouseSelect1
  Qt::LeftButton
• MouseSelect2
  Qt::RightButton
• MouseSelect3
  Qt::LeftButton + Qt::AltButton
• MouseSelect4
  Qt::LeftButton + Qt::ShiftButton
• MouseSelect5
  Qt::RightButton + Qt::ShiftButton
• MouseSelect6
  Qt::LeftButton + Qt::AltButton + Qt::ShiftButton

The default initialization for 1 button mice is:

• MouseSelect1
  Qt::LeftButton
• MouseSelect2
  Qt::LeftButton + Qt::ControlButton
• MouseSelect3
  Qt::LeftButton + Qt::AltButton
• MouseSelect4
  Qt::LeftButton + Qt::ShiftButton
• MouseSelect5
  Qt::LeftButton + Qt::ControlButton + Qt::ShiftButton
• MouseSelect6
  Qt::LeftButton + Qt::AltButton + Qt::ShiftButton

See also:

initMousePattern()

enum QwtPicker::ResizeMode [inherited]

Controls what to do with the selected points of an active selection when the observed widget is resized.

The default value is QwtPicker::Stretch.

See also:

setResizeMode()

Enumerator:

Stretch	All points are scaled according to the new size,.
KeepSize	All points remain unchanged.

enum QwtPicker::RubberBand [inherited]

Rubberband style

The default value is QwtPicker::NoRubberBand.

See also:

setRubberBand(), rubberBand()

Enumerator:

NoRubberBand	No rubberband.
HLineRubberBand	A horizontal line ( only for QwtPicker::PointSelection )
VLineRubberBand	A vertical line ( only for QwtPicker::PointSelection )
CrossRubberBand	A crosshair ( only for QwtPicker::PointSelection )
RectRubberBand	A rectangle ( only for QwtPicker::RectSelection )
EllipseRubberBand	An ellipse ( only for QwtPicker::RectSelection )
PolygonRubberBand	A polygon ( only for QwtPicker::&PolygonSelection )
UserRubberBand	Values >= UserRubberBand can be used to define additional rubber bands.

---

Constructor & Destructor Documentation

QwtPlotPicker::QwtPlotPicker

(

QwtPlotCanvas *

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

(

)

[virtual]

Destructor.

QwtPlotPicker::QwtPlotPicker	(	int	xAxis,
		int	yAxis,
		QwtPlotCanvas *	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,
		QwtPlotCanvas *	canvas
	)		[explicit]

Create a plot picker

Parameters:

xAxis	X axis of the picker
yAxis	Y axis of the picker
rubberBand	Rubberband 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

bool QwtPicker::accept

(

QPolygon &

selection

)

const [protected, virtual, inherited]

Validate and fixup the selection.

Accepts all selections unmodified

Parameters:

selection

Selection to validate and fixup

Returns:

true, when accepted, false otherwise

Reimplemented in QwtPlotZoomer.

void QwtPicker::activated

(

bool

on

)

[signal, inherited]

A signal indicating, when the picker has been activated. Together with setEnabled() it can be used to implement selections with more than one picker.

Parameters:

on	True, when the picker has been activated

QPolygon QwtPicker::adjustedPoints

(

const QPolygon &

points

)

const [protected, virtual, inherited]

Map the pickedPoints() into a selection()

adjustedPoints() maps the points, that have been collected on the parentWidget() into a selection(). The default implementation simply returns the points unmodified.

The reason, why a selection() differs from the picked points depends on the application requirements. F.e. :

• A rectangular selection might need to have a specific aspect ratio only.
  
• A selection could accept non intersecting polygons only.
  
• ...
  

The example below is for a rectangular selection, where the first point is the center of the selected rectangle.

Example

QPolygon MyPicker::adjustedPoints(const QPolygon &points) const
{
    QPolygon adjusted;
    if ( points.size() == 2 )
    {
        const int width = qAbs(points[1].x() - points[0].x());
        const int height = qAbs(points[1].y() - points[0].y());

        QRect rect(0, 0, 2 * width, 2 * height);
        rect.moveCenter(points[0]);

        adjusted += rect.topLeft();
        adjusted += rect.bottomRight();
    }
    return adjusted;
}

void QwtPlotPicker::append

(

const QPoint &

pos

)

[protected, virtual]

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.

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()

void QwtPicker::appended

(

const QPoint &

pos

)

[signal, inherited]

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

Parameters:

pos	Position of the appended point.

See also:

append(). moved()

void QwtPicker::begin

(

)

[protected, virtual, inherited]

Open a selection setting the state to active

See also:

isActive(), end(), append(), move()

Reimplemented in QwtPlotZoomer.

QwtPlotCanvas * QwtPlotPicker::canvas

(

)

Return observed plot canvas.

const QwtPlotCanvas * QwtPlotPicker::canvas

(

)

const

Return Observed plot canvas.

void QwtPicker::changed

(

const QPolygon &

selection

)

[signal, inherited]

A signal emitted when the active selection has been changed. This might happen when the observed widget is resized.

Parameters:

selection

Changed selection

See also:

stretchSelection()

void QwtPicker::drawRubberBand

(

QPainter *

painter

)

const [virtual, inherited]

Draw a rubberband, depending on rubberBand()

Parameters:

painter

Painter, initialized with clip rect

See also:

rubberBand(), RubberBand

void QwtPicker::drawTracker

(

QPainter *

painter

)

const [virtual, inherited]

Draw the tracker

Parameters:

painter

Painter

See also:

trackerRect(), trackerText()

bool QwtPlotPicker::end

(

bool

ok = true

)

[protected, virtual]

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.

Reimplemented in QwtPlotZoomer.

bool QwtPicker::eventFilter	(	QObject *	object,
		QEvent *	event
	)		[virtual, inherited]

Event filter.

When isEnabled() == true all events of the observed widget are filtered. Mouse and keyboard events are translated into widgetMouse- and widgetKey- and widgetWheel-events. Paint and Resize events are handled to keep rubberband and tracker up to date.

Parameters:

object	Object to be filtered
event	Event

See also:

widgetEnterEvent(), widgetLeaveEvent(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent(), QObject::installEventFilter(), QObject::event()

void QwtEventPattern::initKeyPattern

(

)

[inherited]

Set default mouse patterns.

See also:

KeyPatternCode

void QwtEventPattern::initMousePattern

(

int

numButtons

)

[inherited]

Set default mouse patterns, depending on the number of mouse buttons

Parameters:

numButtons

Number of mouse buttons ( <= 3 )

See also:

MousePatternCode

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()

bool QwtPicker::isActive

(

)

const [inherited]

A picker is active between begin() and end().

Returns:

true if the selection is active.

bool QwtPicker::isEnabled

(

)

const [inherited]

Returns:

true when enabled, false otherwise

See also:

setEnabled(), eventFilter()

bool QwtEventPattern::keyMatch	(	uint	pattern,
		const QKeyEvent *	event
	)		const [inherited]

Compare a key event with an event pattern.

A key event matches the pattern when both have the same key value and in the state value the same key flags (Qt::KeyButtonMask) are set.

Parameters:

pattern	Index of the event pattern
event	Key event

Returns:

true if matches

See also:

mouseMatch()

bool QwtEventPattern::keyMatch	(	const KeyPattern &	pattern,
		const QKeyEvent *	event
	)		const [protected, virtual, inherited]

Compare a key event with an event pattern.

A key event matches the pattern when both have the same key value and in the state value the same key flags (Qt::KeyButtonMask) are set.

Parameters:

pattern	Key event pattern
event	Key event

Returns:

true if matches

See also:

mouseMatch()

const QVector< QwtEventPattern::KeyPattern > & QwtEventPattern::keyPattern

(

)

const [inherited]

Return key patterns.

QVector< QwtEventPattern::KeyPattern > & QwtEventPattern::keyPattern

(

)

[inherited]

Return Key patterns.

bool QwtEventPattern::mouseMatch	(	uint	pattern,
		const QMouseEvent *	event
	)		const [inherited]

Compare a mouse event with an event pattern.

A mouse event matches the pattern when both have the same button value and in the state value the same key flags(Qt::KeyButtonMask) are set.

Parameters:

pattern	Index of the event pattern
event	Mouse event

Returns:

true if matches

See also:

keyMatch()

bool QwtEventPattern::mouseMatch	(	const MousePattern &	pattern,
		const QMouseEvent *	event
	)		const [protected, virtual, inherited]

Compare a mouse event with an event pattern.

A mouse event matches the pattern when both have the same button value and in the state value the same key flags(Qt::KeyButtonMask) are set.

Parameters:

pattern	Mouse event pattern
event	Mouse event

Returns:

true if matches

See also:

keyMatch()

const QVector< QwtEventPattern::MousePattern > & QwtEventPattern::mousePattern

(

)

const [inherited]

Return mouse patterns.

QVector< QwtEventPattern::MousePattern > & QwtEventPattern::mousePattern

(

)

[inherited]

Return ,ouse patterns.

void QwtPlotPicker::move

(

const QPoint &

pos

)

[protected, virtual]

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()

void QwtPicker::moved

(

const QPoint &

pos

)

[signal, inherited]

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()

QWidget * QwtPicker::parentWidget

(

)

[inherited]

Return the parent widget, where the selection happens.

const QWidget * QwtPicker::parentWidget

(

)

const [inherited]

Return the parent widget, where the selection happens.

const QPolygon & QwtPicker::pickedPoints

(

)

const [protected, inherited]

Return the points, that have been collected so far. The selection() is calculated from the pickedPoints() in adjustedPoints().

Returns:

Picked points

QRect QwtPicker::pickRect

(

)

const [virtual, inherited]

Find the area of the observed widget, where selection might happen.

Returns:

parentWidget()->contentsRect()

QwtPlot * QwtPlotPicker::plot

(

)

Return plot widget, containing the observed plot canvas.

const QwtPlot * QwtPlotPicker::plot

(

)

const

Return plot widget, containing the observed plot canvas.

void QwtPicker::remove

(

)

[protected, virtual, inherited]

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

See also:

isActive(), begin(), end(), append(), move()

void QwtPicker::removed

(

const QPoint &

pos

)

[signal, inherited]

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

See also:

remove(), appended()

void QwtPicker::reset

(

)

[protected, virtual, inherited]

Reset the state machine and terminate (end(false)) the selection

QwtPicker::ResizeMode QwtPicker::resizeMode

(

)

const [inherited]

Returns:

Resize mode

See also:

setResizeMode(), ResizeMode

QwtPicker::RubberBand QwtPicker::rubberBand

(

)

const [inherited]

Returns:

Rubberband style

See also:

setRubberBand(), RubberBand, rubberBandPen()

QPen QwtPicker::rubberBandPen

(

)

const [inherited]

Returns:

Rubberband pen

See also:

setRubberBandPen(), rubberBand()

const QWidget * QwtPicker::rubberBandWidget

(

)

const [protected, inherited]

Returns:

Widget displaying the rubberband

QRectF QwtPlotPicker::scaleRect

(

)

const [protected]

Return normalized bounding rect of the axes

See also:

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

void QwtPlotPicker::selected

(

const QPointF &

pos

)

[signal]

A signal emitted in case of selectionFlags() & PointSelection.

Parameters:

pos	Selected point

void QwtPlotPicker::selected

(

const QRectF &

rect

)

[signal]

A signal emitted in case of selectionFlags() & 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 QwtPicker::selected

(

const QPolygon &

polygon

)

[signal, inherited]

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

Parameters:

polygon

Selected points

QPolygon QwtPicker::selection

(

)

const [inherited]

Returns:

Selected points

See also:

pickedPoints(), adjustedPoints()

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.

void QwtPicker::setEnabled

(

bool

enabled

)

[slot, inherited]

En/disable the picker.

When enabled is true an event filter is installed for the observed widget, otherwise the event filter is removed.

Parameters:

enabled

true or false

See also:

isEnabled(), eventFilter()

void QwtEventPattern::setKeyPattern	(	uint	pattern,
		int	key,
		int	state = Qt::NoButton
	)		[inherited]

Change one key pattern

Parameters:

pattern	Index of the pattern
key	Key
state	State

See also:

QKeyEvent

void QwtEventPattern::setKeyPattern

(

const QVector< KeyPattern > &

pattern

)

[inherited]

Change the key event patterns.

void QwtEventPattern::setMousePattern	(	uint	pattern,
		int	button,
		int	state = Qt::NoButton
	)		[inherited]

Change one mouse pattern

Parameters:

pattern	Index of the pattern
button	Button
state	State

See also:

QMouseEvent

void QwtEventPattern::setMousePattern

(

const QVector< MousePattern > &

pattern

)

[inherited]

Change the mouse event patterns.

void QwtPicker::setResizeMode

(

ResizeMode

mode

)

[inherited]

Set the resize mode.

The resize mode controls what to do with the selected points of an active selection when the observed widget is resized.

Stretch means the points are scaled according to the new size, KeepSize means the points remain unchanged.

The default mode is Stretch.

Parameters:

mode	Resize mode

See also:

resizeMode(), ResizeMode

void QwtPicker::setRubberBand

(

RubberBand

rubberBand

)

[inherited]

Set the rubberband style

Parameters:

rubberBand

Rubberband style The default value is NoRubberBand.

See also:

rubberBand(), RubberBand, setRubberBandPen()

void QwtPicker::setRubberBandPen

(

const QPen &

pen

)

[inherited]

Set the pen for the rubberband

Parameters:

pen	Rubberband pen

See also:

rubberBandPen(), setRubberBand()

void QwtPicker::setStateMachine

(

QwtPickerMachine *

stateMachine

)

[inherited]

Set a state machine and delete the previous one

Parameters:

stateMachine

State machine

See also:

stateMachine()

void QwtPicker::setTrackerFont

(

const QFont &

font

)

[inherited]

Set the font for the tracker

Parameters:

font	Tracker font

See also:

trackerFont(), setTrackerMode(), setTrackerPen()

void QwtPicker::setTrackerMode

(

DisplayMode

mode

)

[inherited]

Set the display mode of the tracker.

A tracker displays information about current position of the cursor as a string. The display mode controls if the tracker has to be displayed whenever the observed widget has focus and cursor (AlwaysOn), never (AlwaysOff), or only when the selection is active (ActiveOnly).

Parameters:

mode	Tracker display mode

Warning:

In case of AlwaysOn, mouseTracking will be enabled for the observed widget.

See also:

trackerMode(), DisplayMode

void QwtPicker::setTrackerPen

(

const QPen &

pen

)

[inherited]

Set the pen for the tracker

Parameters:

pen	Tracker pen

See also:

trackerPen(), setTrackerMode(), setTrackerFont()

const QwtPickerMachine * QwtPicker::stateMachine

(

)

const [inherited]

Returns:

Assigned state machine

See also:

setStateMachine()

QwtPickerMachine * QwtPicker::stateMachine

(

)

[inherited]

Returns:

Assigned state machine

See also:

setStateMachine()

void QwtPicker::stretchSelection	(	const QSize &	oldSize,
		const QSize &	newSize
	)		[protected, virtual, inherited]

Scale the selection by the ratios of oldSize and newSize The changed() signal is emitted.

Parameters:

oldSize	Previous size
newSize	Current size

See also:

ResizeMode, setResizeMode(), resizeMode()

QFont QwtPicker::trackerFont

(

)

const [inherited]

Returns:

Tracker font

See also:

setTrackerFont(), trackerMode(), trackerPen()

QwtPicker::DisplayMode QwtPicker::trackerMode

(

)

const [inherited]

Returns:

Tracker display mode

See also:

setTrackerMode(), DisplayMode

QPen QwtPicker::trackerPen

(

)

const [inherited]

Returns:

Tracker pen

See also:

setTrackerPen(), trackerMode(), trackerFont()

QPoint QwtPicker::trackerPosition

(

)

const [inherited]

Returns:

Current position of the tracker

QRect QwtPicker::trackerRect

(

const QFont &

font

)

const [virtual, inherited]

Calculate the bounding rectangle for the tracker text from the current position of the tracker

Parameters:

font	Font of the tracker text

Returns:

Bounding rectangle of the tracker text

See also:

trackerPosition()

QwtText QwtPlotPicker::trackerText

(

const QPoint &

pos

)

const [protected, virtual]

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 [protected, virtual]

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

const QWidget * QwtPicker::trackerWidget

(

)

const [protected, inherited]

Returns:

Widget displaying the tracker text

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()

void QwtPicker::transition

(

const QEvent *

event

)

[protected, virtual, inherited]

Passes an event to the state machine and executes the resulting commands. Append and Move commands use the current position of the cursor (QCursor::pos()).

Parameters:

event

Event

void QwtPicker::updateDisplay

(

)

[protected, virtual, inherited]

Update the state of rubberband and tracker label.

void QwtPicker::widgetEnterEvent

(

QEvent *

event

)

[protected, virtual, inherited]

Handle a enter event for the observed widget.

Parameters:

event

Qt event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()

void QwtPicker::widgetKeyPressEvent

(

QKeyEvent *

keyEvent

)

[protected, virtual, inherited]

Handle a key press event for the observed widget.

Selections can be completely done by the keyboard. The arrow keys move the cursor, the abort key aborts a selection. All other keys are handled by the current state machine.

Parameters:

keyEvent

Key event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyReleaseEvent(), stateMachine(), QwtEventPattern::KeyPatternCode

Reimplemented in QwtPlotZoomer.

void QwtPicker::widgetKeyReleaseEvent

(

QKeyEvent *

keyEvent

)

[protected, virtual, inherited]

Handle a key release event for the observed widget.

Passes the event to the state machine.

Parameters:

keyEvent

Key event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), stateMachine()

void QwtPicker::widgetLeaveEvent

(

QEvent *

event

)

[protected, virtual, inherited]

Handle a leave event for the observed widget.

Parameters:

event

Qt event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()

void QwtPicker::widgetMouseDoubleClickEvent

(

QMouseEvent *

mouseEvent

)

[protected, virtual, inherited]

Handle mouse double click event for the observed widget.

Parameters:

mouseEvent

Mouse event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()

void QwtPicker::widgetMouseMoveEvent

(

QMouseEvent *

mouseEvent

)

[protected, virtual, inherited]

Handle a mouse move event for the observed widget.

Parameters:

mouseEvent

Mouse event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()

void QwtPicker::widgetMousePressEvent

(

QMouseEvent *

mouseEvent

)

[protected, virtual, inherited]

Handle a mouse press event for the observed widget.

Parameters:

mouseEvent

Mouse event

See also:

eventFilter(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()

void QwtPicker::widgetMouseReleaseEvent

(

QMouseEvent *

mouseEvent

)

[protected, virtual, inherited]

Handle a mouse relase event for the observed widget.

Parameters:

mouseEvent

Mouse event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetWheelEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()

Reimplemented in QwtPlotZoomer.

void QwtPicker::widgetWheelEvent

(

QWheelEvent *

wheelEvent

)

[protected, virtual, inherited]

Handle a wheel event for the observed widget.

Move the last point of the selection in case of isActive() == true

Parameters:

wheelEvent

Wheel event

See also:

eventFilter(), widgetMousePressEvent(), widgetMouseReleaseEvent(), widgetMouseDoubleClickEvent(), widgetMouseMoveEvent(), widgetKeyPressEvent(), widgetKeyReleaseEvent()

int QwtPlotPicker::xAxis

(

)

const

Return x axis.

int QwtPlotPicker::yAxis

(

)

const

Return y axis.