Base picker class specifically for canvas 更多...

#include <qwt_canvas_picker.h>

类 QwtCanvasPicker 继承关系图:

Public 成员函数
	QwtCanvasPicker (QWidget *canvas)
	Constructor with canvas widget

	~QwtCanvasPicker () override
	Destructor

QwtPlot *	plot ()
	Get the associated plot

const QwtPlot *	plot () const
	Get the associated plot (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 QwtText	trackerText (const QPoint &pos) const
	Return the label for a position

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

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

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

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

virtual void	move (const QPoint &)
	Move the last point of the selection The moved() signal is emitted.

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

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

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.

属性继承自 QwtPicker
bool	isEnabled

ResizeMode	resizeMode

DisplayMode	trackerMode

QPen	trackerPen

QFont	trackerFont

RubberBand	rubberBand

QPen	rubberBandPen

详细描述

Base picker class specifically for canvas

Provides convenient access methods for canvas and plot, serving as a base class for other canvas-related tools.

构造及析构函数说明

◆ QwtCanvasPicker()

QwtCanvasPicker::QwtCanvasPicker ( QWidget * canvas )

explicit

Constructor with canvas widget

参数

[in] canvas Canvas widget to attach the picker to

成员函数说明

◆ canvas() [1/2]

QWidget * QwtCanvasPicker::canvas ( )

Get the canvas widget

返回: Pointer to the canvas widget

◆ canvas() [2/2]

const QWidget * QwtCanvasPicker::canvas ( ) const

Get the canvas widget (const version)

返回: Const pointer to the canvas widget

◆ plot() [1/2]

QwtPlot * QwtCanvasPicker::plot ( )

Get the associated plot

Finds the parent QwtPlot by traversing the widget hierarchy.

返回: Pointer to the associated plot, or nullptr if not found

◆ plot() [2/2]

const QwtPlot * QwtCanvasPicker::plot ( ) const

Get the associated plot (const version)