Method focusOutEvent

src/gui/PianoView.cpp:660–690

! \brief Handle the focus leaving the piano display view * * Turn off all notes if we lose focus. * * \todo Is there supposed to be a parameter given here? */

 *  \todo Is there supposed to be a parameter given here?
 */
void PianoView::focusOutEvent( QFocusEvent * )
{
	if( m_piano == NULL )
	{
		return;
	}

	// focus just switched to another control inside the instrument track
	// window we live in?
	if( parentWidget()->parentWidget()->focusWidget() != this &&
		parentWidget()->parentWidget()->focusWidget() != NULL &&
		!(parentWidget()->parentWidget()->
				focusWidget()->inherits( "QLineEdit" ) ||
		parentWidget()->parentWidget()->
				focusWidget()->inherits( "QPlainTextEdit" ) ))
	{
		// then reclaim keyboard focus!
		setFocus();
		return;
	}

	// if we loose focus, we HAVE to note off all running notes because
	// we don't receive key-release-events anymore and so the notes would
	// hang otherwise
	for( int i = 0; i < NumKeys; ++i )
	{
		m_piano->midiEventProcessor()->processInEvent( MidiEvent( MidiNoteOff, -1, i, 0 ) );
		m_piano->setKeyState( i, false );
	}
	update();
}