QwtPickerDragLineMachine (3) Linux Manual Page
QwtPickerDragLineMachine –
A state machine for line selections.
Synopsis
#include <qwt_picker_machine.h> Inherits QwtPickerMachine.
Public Member Functions
QwtPickerDragLineMachine ()Constructor.
virtual QList< Command > transition (const QwtEventPattern &, const QEvent *)
Transition.
Additional Inherited Members
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