Method changePosition

src/core/Track.cpp:1217–1296

resposible for moving track-content-widgets to appropriate position after change of visible viewport ! \brief Move the trackContentWidget to a new place in time * * \param newPos The MIDI time to move to. */

 * \param newPos The MIDI time to move to.
 */
void TrackContentWidget::changePosition( const MidiTime & newPos )
{
	if( m_trackView->trackContainerView() == gui->getBBEditor()->trackContainerView() )
	{
		const int curBB = Engine::getBBTrackContainer()->currentBB();
		setUpdatesEnabled( false );

		// first show TCO for current BB...
		for( tcoViewVector::iterator it = m_tcoViews.begin();
						it != m_tcoViews.end(); ++it )
		{
		if( ( *it )->getTrackContentObject()->
                            startPosition().getTact() == curBB )
			{
				( *it )->move( 0, ( *it )->y() );
				( *it )->raise();
				( *it )->show();
			}
			else
			{
				( *it )->lower();
			}
		}
		// ...then hide others to avoid flickering
		for( tcoViewVector::iterator it = m_tcoViews.begin();
					it != m_tcoViews.end(); ++it )
		{
			if( ( *it )->getTrackContentObject()->
	                            startPosition().getTact() != curBB )
			{
				( *it )->hide();
			}
		}
		setUpdatesEnabled( true );
		return;
	}

	MidiTime pos = newPos;
	if( pos < 0 )
	{
		pos = m_trackView->trackContainerView()->currentPosition();
	}

	const int begin = pos;
	const int end = endPosition( pos );
	const float ppt = m_trackView->trackContainerView()->pixelsPerTact();

	setUpdatesEnabled( false );
	for( tcoViewVector::iterator it = m_tcoViews.begin();
						it != m_tcoViews.end(); ++it )
	{
		TrackContentObjectView * tcov = *it;
		TrackContentObject * tco = tcov->getTrackContentObject();

		tco->changeLength( tco->length() );

		const int ts = tco->startPosition();
		const int te = tco->endPosition()-3;