QwtPickerMachine - Man Page
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
Definition at line 28 of file qwt_picker_machine.h.
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).
Definition at line 35 of file qwt_picker_machine.h.
Author
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