QwtPickerDragLineMachine Class Reference

A state machine for line selections. More...

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerDragLineMachine:

Public Member Functions
	QwtPickerDragLineMachine ()
	Constructor.
virtual QList< Command >	transition (const QwtEventPattern &, const QEvent *)
	Transition.

---

Detailed Description

A state machine for line selections.

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

A common use case of QwtPickerDragLineMachine are pickers for distance measurements.

See also:

QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode

List of all members.