Qwt User's Guide
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< Commandtransition (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.

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