QwtPlotPicker provides selections on a plot canvas 更多...

#include <qwt_plot_picker.h>

类 QwtPlotPicker 继承关系图:

类
class	PrivateData

信号
void	selected (const QPointF &pos)
	Signal emitted in case of QwtPickerMachine::PointSelection

void	selected (const QRectF &rect)
	Signal emitted in case of QwtPickerMachine::RectSelection

void	selected (const QVector< QPointF > &pa)
	Signal emitting the selected points at the end of a selection

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

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

信号继承自 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 成员函数
	QwtPlotPicker (QWidget *canvas)
	Constructor

	~QwtPlotPicker () override
	Destructor

	QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, QWidget *)
	Constructor with axes

	QwtPlotPicker (QwtAxisId xAxisId, QwtAxisId yAxisId, RubberBand rubberBand, DisplayMode trackerMode, QWidget *)
	Constructor with axes, rubber band and tracker mode

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

QwtAxisId	xAxis () const
	Get the x axis

QwtAxisId	yAxis () const
	Get the y axis

QwtPlot *	plot ()
	Get the plot widget

const QwtPlot *	plot () const
	Get the plot widget (const version)

QWidget *	canvas ()
	Get the canvas widget

const QWidget *	canvas () const
	Get the canvas widget (const version)

Public 成员函数继承自 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 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)
	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 成员函数继承自 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 成员函数
QRectF	scaleRect () const
	Get the scale rectangle

QRectF	invTransform (const QRect &) const
	Inverse transform a rectangle

QRect	transform (const QRectF &) const
	Transform a rectangle

QPointF	invTransform (const QPoint &) const
	Inverse transform a point

QPoint	transform (const QPointF &) const
	Transform a point

virtual QwtText	trackerText (const QPoint &) const override
	Get the tracker text for a point

virtual QwtText	trackerTextF (const QPointF &) const
	Get the tracker text for a point (floating 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 成员函数继承自 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 成员函数继承自 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.

额外继承的成员函数
Public 类型继承自 QwtPicker
enum	RubberBand { NoRubberBand = 0 , HLineRubberBand , VLineRubberBand , CrossRubberBand , RectRubberBand , EllipseRubberBand , PolygonRubberBand , UserRubberBand = 100 }
	Rubber band style 更多...

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

enum	ResizeMode { Stretch , KeepSize }
	Controls what to do with the selected points when the observed widget is resized 更多...

Public 类型继承自 QwtEventPattern
enum	MousePatternCode { MouseSelect1 , MouseSelect2 , MouseSelect3 , MouseSelect4 , MouseSelect5 , MouseSelect6 , MousePatternCount }
	Symbolic mouse input codes 更多...

enum	KeyPatternCode { KeySelect1 , KeySelect2 , KeyAbort , KeyLeft , KeyRight , KeyUp , KeyDown , KeyRedo , KeyUndo , KeyHome , KeyPatternCount }
	Symbolic keyboard input codes 更多...

Public 槽继承自 QwtPicker
void	setEnabled (bool)
	Enable or disable the picker

属性继承自 QwtPicker
bool	isEnabled

ResizeMode	resizeMode

DisplayMode	trackerMode

QPen	trackerPen

QFont	trackerFont

RubberBand	rubberBand

QPen	rubberBandPen

详细描述

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.

构造及析构函数说明

◆ QwtPlotPicker()

QwtPlotPicker::QwtPlotPicker ( QWidget * canvas )

explicit

Constructor

Creates a plot picker attached to the specified canvas. 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.

参数

[in] canvas Plot canvas to observe, also the parent object

参见: QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()

Constructor with axes

Creates a plot picker attached to the specified canvas with given axes.

参数

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

参见: QwtPlot::autoReplot(), QwtPlot::replot(), scaleRect()

Constructor with axes, rubber band and tracker mode

Creates a plot picker with specified axes, rubber band style and tracker mode.

参数

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

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

Destructor

Destroys the plot picker and releases all allocated resources.

成员函数说明

◆ append()

void QwtPlotPicker::append ( const QPoint & pos )

overrideprotectedvirtual

Append a point to the selection

Append a point to the selection and update rubber band and tracker.

参数

pos	Additional point

参见: isActive, begin(), end(), move(), appended()

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

重载 QwtPicker .

◆ appended

void QwtPlotPicker::appended ( const QPointF & pos )

signal

Signal emitted when a point has been appended to the selection

参数

pos	Position of the appended point

参见: append(), moved()

◆ canvas() [1/2]

QWidget * QwtPlotPicker::canvas ( )

Get the canvas widget

返回: Observed plot canvas widget

◆ canvas() [2/2]

const QWidget * QwtPlotPicker::canvas ( ) const

Get the canvas widget (const version)

返回: Observed plot canvas widget

◆ end()

bool QwtPlotPicker::end ( bool ok = true )

overrideprotectedvirtual

End the selection

Close a selection setting the state to inactive.

参数

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

返回: True if the selection has been accepted, false otherwise

重载 QwtPicker .

被 QwtPlotAxisZoomer 重载.

◆ invTransform() [1/2]

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

protected

Inverse transform a point

Translate a point from pixel into plot coordinates

返回: Point in plot coordinates

参见: transform()

◆ invTransform() [2/2]

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

protected

Inverse transform a rectangle

Translate a rectangle from pixel into plot coordinates

返回: Rectangle in plot coordinates

参见: transform()

◆ move()

void QwtPlotPicker::move ( const QPoint & pos )

overrideprotectedvirtual

Move the selection

Move the last point of the selection

参数

pos	New position

参见: isActive, begin(), end(), append()

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

重载 QwtPicker .

◆ moved

void QwtPlotPicker::moved ( const QPointF & pos )

signal

Signal emitted whenever the last appended point of the selection has been moved

参数

pos	Position of the moved last point of the selection

参见: move(), appended()

◆ plot() [1/2]

QwtPlot * QwtPlotPicker::plot ( )

Get the plot widget

返回: Plot widget containing the observed plot canvas

◆ plot() [2/2]

const QwtPlot * QwtPlotPicker::plot ( ) const

Get the plot widget (const version)

返回: Plot widget containing the observed plot canvas

◆ scaleRect()

QRectF QwtPlotPicker::scaleRect ( ) const

protected

Get the scale rectangle

返回: Normalized bounding rectangle of the axes

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

◆ selected [1/3]

void QwtPlotPicker::selected ( const QPointF & pos )

signal

Signal emitted in case of QwtPickerMachine::PointSelection

参数

pos	Selected point

◆ selected [2/3]

void QwtPlotPicker::selected ( const QRectF & rect )

signal

Signal emitted in case of QwtPickerMachine::RectSelection

参数

rect	Selected rectangle

◆ selected [3/3]

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

signal

Signal emitting the selected points at the end of a selection

参数

pa	Selected points

◆ setAxes()

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

virtual

Set the x and y axes

Binds the picker to the specified x and y axes.

参数

[in]	xAxisId	X axis ID
[in]	yAxisId	Y axis ID

被 QwtPlotAxisZoomer 重载.

◆ trackerText()

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

overrideprotectedvirtual

Get the tracker text for a point

Translate a pixel position into a position string

参数

pos	Position in pixel coordinates

返回: Position string

重载 QwtPicker .

◆ trackerTextF()

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

protectedvirtual

Get the tracker text for a point (floating 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".

参数

pos Position

返回: Position string

◆ transform() [1/2]

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

protected

Transform a point

Translate a point from plot into pixel coordinates

返回: Point in pixel coordinates

参见: invTransform()

◆ transform() [2/2]

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

protected

Transform a rectangle

Translate a rectangle from plot into pixel coordinates

返回: Rectangle in pixel coordinates

参见: invTransform()

◆ xAxis()

QwtAxisId QwtPlotPicker::xAxis ( ) const

Get the x axis

返回: X axis ID

◆ yAxis()

QwtAxisId QwtPlotPicker::yAxis ( ) const

Get the y axis

返回: Y axis ID

该类的文档由以下文件生成:

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

类

信号

Public 成员函数

Protected 成员函数

额外继承的成员函数

详细描述

构造及析构函数说明

◆ QwtPlotPicker()

成员函数说明

◆ 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()