QwtPickerDragLineMachine(3) Qwt User's Guide QwtPickerDragLineMachine(3)

QwtPickerDragLineMachine - A state machine for line selections.

#include <qwt_picker_machine.h>

Inherits QwtPickerMachine.


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

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

Generated automatically by Doxygen for Qwt User's Guide from the source code.

Wed Jan 2 2019 Version 6.1.4