QwtPlotPicker 提供绘图画布上的选择功能更多...

#include <qwt_plot_picker.h>

类 QwtPlotPicker 继承关系图:

类
class	PrivateData

信号
void	selected (const QPointF &pos)
	在 QwtPickerMachine::PointSelection 情况下发出的信号

void	selected (const QRectF &rect)
	在 QwtPickerMachine::RectSelection 情况下发出的信号

void	selected (const QVector< QPointF > &pa)
	在选择结束时发出选中点的信号

void	appended (const QPointF &pos)
	当一个点被添加到选择中时发出的信号

void	moved (const QPointF &pos)
	当选择中最后添加的点被移动时发出的信号

信号继承自 QwtPicker
void	activated (bool on)
	当选择器被激活时发出的信号

void	selected (const QPolygon &polygon)
	在选择结束时发出选定点的信号

void	appended (const QPoint &pos)
	当一个点被添加到选择时发出的信号

void	moved (const QPoint &pos)
	当选择的最后一个添加点被移动时发出的信号

void	removed (const QPoint &pos)
	当选择的最后一个添加点被移除时发出的信号

void	changed (const QPolygon &selection)
	当活动选择被更改时发出的信号

Public 成员函数
	QwtPlotPicker (QWidget *canvas)
	Constructor

virtual	~QwtPlotPicker ()
	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)
	构造函数

	QwtPicker (RubberBand rubberBand, DisplayMode trackerMode, QWidget *)

void	setStateMachine (QwtPickerMachine *)
	设置状态机并删除前一个

const QwtPickerMachine *	stateMachine () const
	返回分配的状态机（const）

QwtPickerMachine *	stateMachine ()
	返回分配的状态机

void	setRubberBand (RubberBand)
	设置橡皮筋样式

RubberBand	rubberBand () const
	返回橡皮筋样式

void	setTrackerMode (DisplayMode)
	设置追踪器的显示模式

DisplayMode	trackerMode () const
	返回追踪器显示模式

void	setResizeMode (ResizeMode)
	设置调整大小模式

ResizeMode	resizeMode () const
	返回调整大小模式

void	setRubberBandPen (const QPen &)
	设置橡皮筋的画笔

QPen	rubberBandPen () const
	返回橡皮筋画笔

void	setTrackerPen (const QPen &)
	设置追踪器的画笔

QPen	trackerPen () const
	返回追踪器画笔

void	setTrackerFont (const QFont &)
	设置追踪器的字体

QFont	trackerFont () const
	返回追踪器字体

bool	isEnabled () const
	启用时返回 true，否则返回 false

bool	isActive () const
	选择器在 begin() 和 end() 之间处于活动状态

virtual bool	eventFilter (QObject , QEvent ) override
	处理事件的事件过滤器

QWidget *	parentWidget ()
	返回发生选择的父控件

const QWidget *	parentWidget () const
	返回发生选择的父控件（const）

virtual QPainterPath	pickArea () const
	找到观察部件上可能发生选择的区域

virtual void	drawRubberBand (QPainter *) const
	根据橡皮筋样式绘制橡皮筋

virtual void	drawTracker (QPainter *) const
	绘制追踪器

virtual QRegion	trackerMask () const
	计算追踪器覆盖层的掩码

virtual QRegion	rubberBandMask () const
	计算橡皮筋覆盖层的掩码

virtual QRect	trackerRect (const QFont &) const
	从追踪器当前位置计算追踪器文本的边界矩形

virtual void	setTrackerPosition (const QPoint &pos)
	手动设置追踪器位置

QPoint	trackerPosition () const
	返回追踪器的当前位置

QPolygon	selection () const
	返回选定的点

void	update ()

void	setActive (bool on)

Public 成员函数继承自 QwtEventPattern
	QwtEventPattern ()
	构造函数

virtual	~QwtEventPattern ()
	析构函数

void	initMousePattern (int numButtons)
	根据鼠标按钮数量设置默认鼠标模式

void	initKeyPattern ()
	设置默认按键模式

void	setMousePattern (MousePatternCode, Qt::MouseButton button, Qt::KeyboardModifiers=Qt::NoModifier)
	更改一个鼠标模式

void	setKeyPattern (KeyPatternCode, int key, Qt::KeyboardModifiers modifiers=Qt::NoModifier)
	更改一个按键模式

void	setMousePattern (const QVector< MousePattern > &)
	更改鼠标事件模式

void	setKeyPattern (const QVector< KeyPattern > &)
	更改按键事件模式

const QVector< MousePattern > &	mousePattern () const
	返回鼠标模式向量

const QVector< KeyPattern > &	keyPattern () const
	返回按键模式向量

QVector< MousePattern > &	mousePattern ()
	返回鼠标模式向量

QVector< KeyPattern > &	keyPattern ()
	返回按键模式向量

bool	mouseMatch (MousePatternCode, const QMouseEvent *) const
	将鼠标事件与事件模式进行比较

bool	keyMatch (KeyPatternCode, const QKeyEvent *) const
	将按键事件与事件模式进行比较

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
	将 pickedPoints() 映射为 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
	返回显示橡皮筋的覆盖层

const QwtWidgetOverlay *	trackerOverlay () const
	返回显示追踪器文本的覆盖层

const QPolygon &	pickedPoints () const
	返回到目前为止收集的点

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 }
	橡皮筋样式更多...

enum	DisplayMode { AlwaysOff , AlwaysOn , ActiveOnly }
	显示模式更多...

enum	ResizeMode { Stretch , KeepSize }
	控制当观察部件调整大小时对选定点的处理方式更多...

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)
	启用或禁用选择器

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 提供绘图画布上的选择功能

构造及析构函数说明

◆ QwtPlotPicker() [1/3]

QwtPlotPicker::QwtPlotPicker ( QWidget * canvas )

explicit

Constructor

构造函数

◆ ~QwtPlotPicker()

QwtPlotPicker::~QwtPlotPicker ( )

virtual

Destructor

析构函数

◆ QwtPlotPicker() [2/3]

QwtPlotPicker::QwtPlotPicker	(	QwtAxisId	xAxisId,
		QwtAxisId	yAxisId,
		QWidget *	canvas
	)

explicit

Constructor with axes

带坐标轴参数的构造函数

◆ QwtPlotPicker() [3/3]

QwtPlotPicker::QwtPlotPicker	(	QwtAxisId	xAxisId,
		QwtAxisId	yAxisId,
		RubberBand	rubberBand,
		DisplayMode	trackerMode,
		QWidget *	canvas
	)

explicit

Constructor with axes, rubber band and tracker mode

带坐标轴、橡皮筋和跟踪模式的构造函数

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

当一个点被添加到选择中时发出的信号

◆ canvas() [1/2]

QWidget * QwtPlotPicker::canvas ( )

Get the canvas widget

获取画布控件

◆ canvas() [2/2]

const QWidget * QwtPlotPicker::canvas ( ) const

Get the canvas widget (const version)

获取画布控件（常量版本）

◆ 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

当选择中最后添加的点被移动时发出的信号

◆ plot() [1/2]

QwtPlot * QwtPlotPicker::plot ( )

Get the plot widget

获取绘图控件

◆ plot() [2/2]

const QwtPlot * QwtPlotPicker::plot ( ) const

Get the plot widget (const version)

获取绘图控件（常量版本）

◆ 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

在 QwtPickerMachine::PointSelection 情况下发出的信号

◆ selected [2/3]

void QwtPlotPicker::selected ( const QRectF & rect )

signal

在 QwtPickerMachine::RectSelection 情况下发出的信号

◆ selected [3/3]

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

signal

在选择结束时发出选中点的信号

◆ setAxes()

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

virtual

Set the x and y axes

设置 X 轴和 Y 轴

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

获取 X 轴

◆ yAxis()

QwtAxisId QwtPlotPicker::yAxis ( ) const

Get the y axis

获取 Y 轴

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() [1/3]

◆ ~QwtPlotPicker()

◆ QwtPlotPicker() [2/3]

◆ QwtPlotPicker() [3/3]

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()