QwtPickerPolygonMachine(3) A state machine for polygon selections.


#include <qwt_picker_machine.h>

Inherits QwtPickerMachine.

Public Types

enum Command { Begin, Append, Move, End }

typedef QList< Command > CommandList

Public Member Functions

void reset ()

void setState (int)

int state () const

virtual CommandList transition (const QwtEventPattern &, const QEvent *)

Detailed Description

A state machine for polygon selections.

Pressing QwtEventPattern::MouseSelect1 or QwtEventPattern::KeySelect1 starts the selection and selects the first point, or appends a point. Pressing QwtEventPattern::MouseSelect2 or QwtEventPattern::KeySelect2 appends the last point and terminates the selection.

See also:

QwtEventPattern::MousePatternCode, QwtEventPattern::KeyPatternCode

Member Enumeration Documentation

enum QwtPickerMachine::Command [inherited]

Commands - the output of the state machine.

Member Function Documentation

void QwtPickerMachine::reset () [inherited]

Set the current state to 0.

void QwtPickerMachine::setState (intstate) [inherited]

Change the current state.

int QwtPickerMachine::state () const [inherited]

Return the current state.

QwtPickerMachine::CommandList QwtPickerPolygonMachine::transition (const QwtEventPattern &eventPattern, const QEvent *e) [virtual]


Implements QwtPickerMachine.


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