A state machine for QwtPicker selections. More...
#include <qwt_picker_machine.h>
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 |
A state machine for QwtPicker selections.
QwtPickerMachine accepts key and mouse events and translates them into selection commands.
Commands - the output of a state machine.
Type of a selection.
QwtPickerMachine::QwtPickerMachine | ( | SelectionType | type | ) |
Constructor.
QwtPickerMachine::~QwtPickerMachine | ( | ) | [virtual] |
Destructor.
void QwtPickerMachine::reset | ( | ) |
Set the current state to 0.
QwtPickerMachine::SelectionType QwtPickerMachine::selectionType | ( | ) | const |
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] |
Transition.
Implemented in QwtPickerTrackerMachine, QwtPickerClickPointMachine, QwtPickerDragPointMachine, QwtPickerClickRectMachine, QwtPickerDragRectMachine, and QwtPickerPolygonMachine.