QwtPickerDragPointMachine Class Reference

A state machine for point selections. More...

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerDragPointMachine:

Public Member Functions
	QwtPickerDragPointMachine ()
	Constructor.
virtual QList< Command >	transition (const QwtEventPattern &, const QEvent *) override
	Transition function that processes events and returns commands.
Public Member Functions inherited from QwtPickerMachine
	QwtPickerMachine (SelectionType)
	Constructor.
virtual	~QwtPickerMachine ()
	Destructor.
void	reset ()
	Set the current state to 0 (initial state)
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 }
	Type of a selection. More...
enum	Command {   Begin , Append , Move , Remove ,   End }
	Commands - the output of a state machine.

Detailed Description

A state machine for point selections.

Pressing QwtEventPattern::MouseSelect1 or QwtEventPattern::KeySelect1 starts the selection, releasing QwtEventPattern::MouseSelect1 or a second press of QwtEventPattern::KeySelect1 terminates it.

Member Function Documentation

transition()

QList< QwtPickerMachine::Command > QwtPickerDragPointMachine::transition ( const QwtEventPattern &  eventPattern, const QEvent *  event  )

overridevirtual

Transition function that processes events and returns commands.

Parameters

[in]	eventPattern	Event pattern for matching
[in]	event	Event to process

Returns

List of commands generated by the transition

Implements QwtPickerMachine.

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The documentation for this class was generated from the following files:

• /home/runner/work/QWT/QWT/src/plot/qwt_picker_machine.h
• /home/runner/work/QWT/QWT/src/plot/qwt_picker_machine.cpp