Qwt User's Guide 5.2.2
Public Types | Public Member Functions

QwtPickerPolygonMachine Class Reference

A state machine for polygon selections. More...

#include <qwt_picker_machine.h>

Inheritance diagram for QwtPickerPolygonMachine:
Inheritance graph
[legend]

List of all members.

Public Types

enum  Command {
  Begin,
  Append,
  Move,
  End
}
typedef QList< CommandCommandList

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 ( int  state) [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]

Transition.

Implements QwtPickerMachine.