QwtPickerClickRectMachine Class Reference

A state machine for rectangle selections. More...

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerClickRectMachine:

Public Member Functions
	QwtPickerClickRectMachine ()
	Constructor.
virtual QList< Command >	transition (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 rectangle selections.

Pressing QwtEventPattern::MouseSelect1 starts the selection, releasing it selects the first point. Pressing it again selects the second point and terminates the selection. Pressing QwtEventPattern::KeySelect1 also starts the selection, a second press selects the first point. A third one selects the second point and terminates the selection.

See Also

QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode