QwtPickerMachine Class Reference

Inheritance diagram for QwtPickerMachine:

Inheritance graph
[legend]
List of all members.

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 32 of file qwt_picker_machine.h.

Public Types

enum  Command {
  Begin,
  Append,
  Move,
  End
}
typedef QList< CommandCommandList

Public Member Functions

virtual ~QwtPickerMachine ()
virtual CommandList transition (const QwtEventPattern &, const QEvent *)=0
void reset ()
int state () const
void setState (int)

Protected Member Functions

 QwtPickerMachine ()


Member Enumeration Documentation

enum QwtPickerMachine::Command

Commands - the output of the state machine.

Definition at line 36 of file qwt_picker_machine.h.


Constructor & Destructor Documentation

QwtPickerMachine::~QwtPickerMachine (  )  [virtual]

Destructor.

Definition at line 21 of file qwt_picker_machine.cpp.

QwtPickerMachine::QwtPickerMachine (  )  [protected]

Constructor.

Definition at line 15 of file qwt_picker_machine.cpp.


Member Function Documentation

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

Transition.

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

void QwtPickerMachine::reset (  ) 

Set the current state to 0.

Definition at line 38 of file qwt_picker_machine.cpp.

References setState().

int QwtPickerMachine::state (  )  const

Return the current state.

Definition at line 26 of file qwt_picker_machine.cpp.

Referenced by QwtPickerPolygonMachine::transition(), QwtPickerDragRectMachine::transition(), QwtPickerClickRectMachine::transition(), and QwtPickerDragPointMachine::transition().

void QwtPickerMachine::setState ( int   ) 

Change the current state.

Definition at line 32 of file qwt_picker_machine.cpp.

Referenced by reset(), QwtPickerPolygonMachine::transition(), QwtPickerDragRectMachine::transition(), QwtPickerClickRectMachine::transition(), and QwtPickerDragPointMachine::transition().


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