Qwt User's Guide  6.1.3
QwtPickerPolygonMachine Class Reference

A state machine for polygon selections. More...

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerPolygonMachine:

Public Member Functions

 QwtPickerPolygonMachine ()
 Constructor.
 
virtual QList< Commandtransition (const QwtEventPattern &, const QEvent *)
 Transition.
 
- Public Member Functions inherited from QwtPickerMachine
 QwtPickerMachine (SelectionType)
 Constructor.
 
virtual ~QwtPickerMachine ()
 Destructor.
 
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.
 

Additional Inherited Members

- Public Types inherited from QwtPickerMachine
enum  SelectionType { NoSelection = -1, PointSelection, RectSelection, PolygonSelection }
 
enum  Command {
  Begin, Append, Move, Remove,
  End
}
 Commands - the output of a state machine.
 

Detailed Description

A state machine for polygon selections.

Pressing QwtEventPattern::MouseSelect1 or QwtEventPattern::KeySelect1 starts the selection and selects the first point, or appends a point. Pressing QwtEventPattern::MouseSelect2 or QwtEventPattern::KeySelect2 appends the last point and terminates the selection.

See also
QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode