NAME

       QwtPickerMachine - A state machine for QwtPicker selections.

SYNOPSIS

       #include <qwt_picker_machine.h>

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

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

   Public Member Functions
       QwtPickerMachine (SelectionType)
           Constructor.
       virtual ~QwtPickerMachine ()
           Destructor.
       virtual QList< Command > transition (const QwtEventPattern &, const QEvent *)=0
           Transition.
       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.

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::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).

Author

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

Version 6.1.4                                    Wed Jan 2 2019                              QwtPickerMachine(3)