QwtPlotPicker provides selections on a plot canvas/QwtPlotPicker提供绘图画布上的选择功能 More...

#include <qwt_plot_picker.h>

Inheritance diagram for QwtPlotPicker:

Classes
class	PrivateData

Signals
void	selected (const QPointF &pos)
	A signal emitted in case of QwtPickerMachine::PointSelection.

void	selected (const QRectF &rect)
	A signal emitted in case of QwtPickerMachine::RectSelection.

void	selected (const QVector< QPointF > &pa)
	A signal emitting the selected points, at the end of a selection.

void	appended (const QPointF &pos)
	A signal emitted when a point has been appended to the selection.

void	moved (const QPointF &pos)
	A signal emitted whenever the last appended point of the selection has been moved.

Signals inherited from QwtPicker
void	activated (bool on)
	A signal indicating, when the picker has been activated.

void	selected (const QPolygon &polygon)
	A signal emitting the selected points, at the end of a selection.

void	appended (const QPoint &pos)
	A signal emitted when a point has been appended to the selection.

void	moved (const QPoint &pos)
	A signal emitted whenever the last appended point of the selection has been moved.

void	removed (const QPoint &pos)
	A signal emitted whenever the last appended point of the selection has been removed.

void	changed (const QPolygon &selection)
	A signal emitted when the active selection has been changed.

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

virtual	~QwtPlotPicker ()
	Destructor.

	QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, QWidget *)
	Create a plot picker.

	QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
	Create a plot picker.

virtual void	setAxes (QwtAxisId xAxisId, QwtAxisId yAxisId)
	Set the x and y axes of the picker.

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)
	Constructor.

	QwtPicker (RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
	Constructor.

virtual	~QwtPicker ()
	Destructor.

void	setStateMachine (QwtPickerMachine *)
	Set a state machine and delete the previous one.

const QwtPickerMachine *	stateMachine () const

QwtPickerMachine *	stateMachine ()

void	setRubberBand (RubberBand)
	Set the rubber band style.

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 &)
	Set the pen for the rubberband.

QPen	rubberBandPen () const

void	setTrackerPen (const QPen &)
	Set the pen for the tracker.

QPen	trackerPen () const

void	setTrackerFont (const QFont &)
	Set the font for the tracker.

QFont	trackerFont () const

bool	isEnabled () const

bool	isActive () const
	A picker is active between begin() and end().

virtual bool	eventFilter (QObject , QEvent ) QWT_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
	Find the area of the observed widget, where selection might happen.

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)
	强制设置trackerPosition，正常这个不需要调用，但有时候没有鼠标也想显示picker可以通过此函数来设置

QPoint	trackerPosition () const

QPolygon	selection () const

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 mouse 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

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
	Translate a rectangle from pixel into plot coordinates.

QRect	transform (const QRectF &) const
	Translate a rectangle from plot into pixel coordinates.

QPointF	invTransform (const QPoint &) const
	Translate a point from pixel into plot coordinates.

QPoint	transform (const QPointF &) const
	Translate a point from plot into pixel coordinates.

virtual QwtText	trackerText (const QPoint &) const QWT_OVERRIDE
	Translate a pixel position into a position string.

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

virtual void	move (const QPoint &) QWT_OVERRIDE
	Move the last point of the selection.

virtual void	append (const QPoint &) QWT_OVERRIDE
	Append a point to the selection and update rubber band and tracker.

virtual bool	end (bool ok=true) QWT_OVERRIDE
	Close a selection setting the state to inactive.

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

const QwtWidgetOverlay *	trackerOverlay () const

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 of an active selection 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)
	En/disable the picker.

Properties inherited from QwtPicker
bool	isEnabled

ResizeMode	resizeMode

DisplayMode	trackerMode

QPen	trackerPen

QFont	trackerFont

RubberBand	rubberBand

QPen	rubberBandPen

Detailed Description

QwtPlotPicker provides selections on a plot canvas/QwtPlotPicker提供绘图画布上的选择功能

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.

QwtPlotPicker是一款专为绘图画布选择场景设计的 QwtPicker 类。它会绑定到一个X轴和一个Y轴，并将所有像素坐标转换为该坐标系下的坐标。

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()

◆ 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()

◆ QwtPlotPicker() [3/3]

QwtPlotPicker::QwtPlotPicker	(	QwtAxisId	xAxisId,
		QwtAxisId	yAxisId,
		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

◆ append()

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.

◆ 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

◆ canvas() [2/2]

const QWidget * QwtPlotPicker::canvas ( ) const

Returns: Observed plot canvas

◆ end()

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 QwtPlotAxisZoomer.

◆ 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()

◆ 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()

◆ move()

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.

◆ 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

◆ plot() [2/2]

const QwtPlot * QwtPlotPicker::plot ( ) const

Returns: Plot widget, containing the observed plot canvas

◆ scaleRect()

QRectF QwtPlotPicker::scaleRect ( ) const

protected

Returns: Normalized bounding rectangle of the axes

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

◆ selected [1/3]

void QwtPlotPicker::selected ( const QPointF & pos )

signal

A signal emitted in case of QwtPickerMachine::PointSelection.

下面信号个人觉得没有必要在基类中

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 QwtPlotAxisZoomer.

◆ trackerText()

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.

◆ 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

◆ 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()

◆ 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()

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

/home/runner/work/QWT/QWT/src/qwt_plot_picker.h
/home/runner/work/QWT/QWT/src/qwt_plot_picker.cpp

Classes

Signals

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QwtPlotPicker() [1/3]

◆ 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]