Qwt User's Guide  6.0.1
Public Types | Public Member Functions
QwtPickerMachine Class Reference

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerMachine:
Inheritance graph
[legend]

List of all members.

Public Types

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

Public Member Functions

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

Commands - the output of a state machine.

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).


Constructor & Destructor Documentation

Constructor.

Destructor.


Member Function Documentation

Set the current state to 0.

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]