QwtPickerMachine Class Reference

A state machine for QwtPicker selections. More...

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerMachine:
Inheritance graph
[legend]

List of all members.

Public Types

enum  SelectionType {
  NoSelection = -1,
  PointSelection,
  RectSelection,
  PolygonSelection
}
enum  Command {
  Begin,
  Append,
  Move,
  Remove,
  End
}

Public Member Functions

 QwtPickerMachine (SelectionType)
virtual ~QwtPickerMachine ()
virtual QList< Commandtransition (const QwtEventPattern &, const QEvent *)=0
void reset ()
int state () const
void setState (int)
SelectionType selectionType () const

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

Commands - the output of a state machine.

Type of a selection.

  • 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).
See also:
selectionType()

Constructor & Destructor Documentation

QwtPickerMachine::QwtPickerMachine ( SelectionType  type  ) 

Constructor.

QwtPickerMachine::~QwtPickerMachine (  )  [virtual]

Destructor.


Member Function Documentation

void QwtPickerMachine::reset (  ) 

Set the current state to 0.

QwtPickerMachine::SelectionType QwtPickerMachine::selectionType (  )  const

Return the selection type.

void QwtPickerMachine::setState ( int  state  ) 

Change the current state.

int QwtPickerMachine::state (  )  const

Return the current state.

virtual QList<Command> QwtPickerMachine::transition ( const QwtEventPattern ,
const QEvent *   
) [pure virtual]
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