A state machine for QwtPicker selections. More...

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerMachine:

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

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

Public Member Functions
	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.

Detailed Description

A state machine for QwtPicker selections.

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

See also: QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode

Member Enumeration Documentation

◆ SelectionType

enum QwtPickerMachine::SelectionType

Type of a selection.

See also: selectionType()

Enumerator
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).

Constructor & Destructor Documentation

◆ QwtPickerMachine()

QwtPickerMachine::QwtPickerMachine ( SelectionType type )

explicit

Constructor.

Parameters

[in] type Selection type for this state machine

Member Function Documentation

◆ selectionType()

QwtPickerMachine::SelectionType QwtPickerMachine::selectionType ( ) const

Return the selection type.

Returns: Selection type of this state machine

◆ setState()

void QwtPickerMachine::setState ( int state )

Change the current state.

Parameters

[in] state New state value

◆ state()

int QwtPickerMachine::state ( ) const

Return the current state.

Returns: Current state value

◆ transition()

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

pure virtual

Implemented in QwtPickerTrackerMachine, QwtPickerClickPointMachine, QwtPickerDragPointMachine, QwtPickerClickRectMachine, QwtPickerDragRectMachine, QwtPickerDragLineMachine, and QwtPickerPolygonMachine.

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

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

Public Types

Public Member Functions