QwtPickerDragLineMachine - A state machine for line selections.

NAME  SYNOPSIS  Public Member Functions  Additional Inherited Members  Detailed Description  Constructor & Destructor Documentation  QwtPickerDragLineMachine::QwtPickerDragLineMachine ()  Member Function Documentation  QList< QwtPickerMachine::Command > QwtPickerDragLineMachine::transition(const QwtEventPattern & eventPattern, const QEvent * event)[override], [virtual]  Author 

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NAME

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 *) override
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 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

Definition at line 185 of file qwt_picker_machine.h.

Constructor & Destructor Documentation

QwtPickerDragLineMachine::QwtPickerDragLineMachine ()

Constructor.

Definition at line 473 of file qwt_picker_machine.cpp.

Member Function Documentation

QList< QwtPickerMachine::Command > QwtPickerDragLineMachine::transition(const QwtEventPattern & eventPattern, const QEvent * event)[override], [virtual]

Transition.

Implements QwtPickerMachine.

Definition at line 479 of file qwt_picker_machine.cpp.

Author

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

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