A state machine for QwtPicker selections 更多...

#include <qwt_picker_machine.h>

类 QwtPickerMachine 继承关系图:

Public 类型
enum	SelectionType { NoSelection = -1 , PointSelection , RectSelection , PolygonSelection }
	Type of a selection. 更多...

enum	Command { Begin , Append , Move , Remove , End }
	Commands - the output of a state machine

Public 成员函数
	QwtPickerMachine (SelectionType)
	Constructor

virtual	~QwtPickerMachine ()
	Destructor

virtual QList< Command >	transition (const QwtEventPattern &, const QEvent *)=0

void	reset ()
	Set the current state to 0 (initial state)

int	state () const
	Return the current state

void	setState (int)
	Change the current state

SelectionType	selectionType () const
	Return the selection type

详细描述

A state machine for QwtPicker selections

QwtPickerMachine accepts key and mouse events and translates them into selection commands.

参见: QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode

成员枚举类型说明

◆ SelectionType

enum QwtPickerMachine::SelectionType

Type of a selection.

参见: selectionType()

枚举值
NoSelection	The state machine not usable for any type of selection.
PointSelection	The state machine is for selecting a single point.
RectSelection	The state machine is for selecting a rectangle (2 points).
PolygonSelection	The state machine is for selecting a polygon (many points).

构造及析构函数说明

◆ QwtPickerMachine()

QwtPickerMachine::QwtPickerMachine ( SelectionType type )

explicit

Constructor

参数

[in] type Selection type for this state machine

成员函数说明

◆ selectionType()

QwtPickerMachine::SelectionType QwtPickerMachine::selectionType ( ) const

Return the selection type

返回: Selection type of this state machine

◆ setState()

void QwtPickerMachine::setState ( int state )

Change the current state

参数

[in] state New state value

◆ state()

int QwtPickerMachine::state ( ) const

Return the current state

返回: Current state value

◆ transition()

virtual QList< Command > QwtPickerMachine::transition	(	const QwtEventPattern &	,
		const QEvent *
	)

pure virtual

在 QwtPickerTrackerMachine, QwtPickerClickPointMachine, QwtPickerDragPointMachine, QwtPickerClickRectMachine, QwtPickerDragRectMachine, QwtPickerDragLineMachine , 以及 QwtPickerPolygonMachine 内被实现.

该类的文档由以下文件生成:

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

Public 类型

Public 成员函数