SYNOPSIS

#include <qwt_picker_machine.h>

Inherited by QwtPickerClickPointMachine, QwtPickerClickRectMachine, QwtPickerDragPointMachine, QwtPickerDragRectMachine, and QwtPickerPolygonMachine.

Public Types

enum Command { Begin, Append, Move, End }

typedef QList< Command > CommandList

Public Member Functions

void reset ()

void setState (int)

int state () const

virtual CommandList transition (const QwtEventPattern &, const QEvent *)=0

virtual ~QwtPickerMachine ()

Protected Member Functions

QwtPickerMachine ()

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

enum QwtPickerMachine::Command

Commands - the output of the state machine.

Constructor & Destructor Documentation

QwtPickerMachine::~QwtPickerMachine () [virtual]

Destructor.

QwtPickerMachine::QwtPickerMachine () [protected]

Constructor.

Member Function Documentation

void QwtPickerMachine::reset ()

Set the current state to 0.

void QwtPickerMachine::setState (intstate)

Change the current state.

int QwtPickerMachine::state () const

Return the current state.

virtual CommandList QwtPickerMachine::transition (const QwtEventPattern &, const QEvent *) [pure virtual]

Transition.

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

Author

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