QwtPickerMachine Class Reference

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
	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

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).

Member Function Documentation

transition()

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

pure virtual

Transition.

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

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

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