trusty (3) QwtPickerMachine.3.gz

NAME

       QwtPickerMachine -

       A state machine for QwtPicker selections.

SYNOPSIS

       #include <qwt_picker_machine.h>

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

   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< Command > transition (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

   enum QwtPickerMachine::Command
       Commands - the output of a state machine.

   enum QwtPickerMachine::SelectionType 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

   QwtPickerMachine::QwtPickerMachine (SelectionTypetype)
       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 (intstate)
       Change the current state.

   int QwtPickerMachine::state () const
       Return the current state.

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

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

Author

       Generated automatically by Doxygen for Qwt User's Guide from the source code.