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 }

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

Public Member Functions
	QwtPickerMachine (SelectionType)
	Constructor.

virtual	~QwtPickerMachine ()
	Destructor.

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

void	reset ()
	Set the current state to 0.

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

Definition at line 28 of file qwt_picker_machine.h.

Member Enumeration Documentation

◆ Command

enum QwtPickerMachine::Command

Commands - the output of a state machine.

Definition at line 51 of file qwt_picker_machine.h.

◆ 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).

Definition at line 35 of file qwt_picker_machine.h.

Constructor & Destructor Documentation

◆ QwtPickerMachine()

QwtPickerMachine::QwtPickerMachine ( SelectionType type )

explicit

Constructor.

Definition at line 16 of file qwt_picker_machine.cpp.

◆ ~QwtPickerMachine()

QwtPickerMachine::~QwtPickerMachine ( )

virtual

Destructor.

Definition at line 23 of file qwt_picker_machine.cpp.

Member Function Documentation

◆ reset()

void QwtPickerMachine::reset ( )

Set the current state to 0.

Definition at line 46 of file qwt_picker_machine.cpp.

◆ selectionType()

QwtPickerMachine::SelectionType QwtPickerMachine::selectionType ( ) const

Return the selection type.

Definition at line 28 of file qwt_picker_machine.cpp.

◆ setState()

void QwtPickerMachine::setState ( int state )

Change the current state.

Definition at line 40 of file qwt_picker_machine.cpp.

◆ state()

int QwtPickerMachine::state ( ) const

Return the current state.

Definition at line 34 of file qwt_picker_machine.cpp.

◆ transition()

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

pure virtual

Transition.

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

Public Types

Public Member Functions