Method mouseMoveEvent

src/gui/TimeLineWidget.cpp:367–420

void TimeLineWidget::mouseMoveEvent( QMouseEvent* event )
{
	parentWidget()->update(); // essential for widgets that this timeline had taken their mouse move event from.
	const MidiTime t = m_begin + static_cast<int>( qMax( event->x() - m_xOffset - m_moveXOff, 0 ) * MidiTime::ticksPerTact() / m_ppt );

	switch( m_action )
	{
		case MovePositionMarker:
			m_pos.setTicks( t.getTicks() );
			Engine::getSong()->setMilliSeconds( ( t.getTicks() *
					( 60 * 1000 / 48 ) ) /
						Engine::getSong()->getTempo() );
			m_pos.setCurrentFrame( 0 );
			m_pos.setJumped( true );
			updatePosition();
			positionMarkerMoved();
			break;

		case MoveLoopBegin:
		case MoveLoopEnd:
		{
			const int i = m_action - MoveLoopBegin;
			if( event->modifiers() & Qt::ControlModifier )
			{
				// no ctrl-press-hint when having ctrl pressed
				delete m_hint;
				m_hint = NULL;
				m_loopPos[i] = t;
			}
			else
			{
				m_loopPos[i] = t.toNearestTact();
			}
			// Catch begin == end
			if( m_loopPos[0] == m_loopPos[1] )
			{
				// Note, swap 1 and 0 below and the behavior "skips" the other
				// marking instead of pushing it.
				if( m_action == MoveLoopBegin ) 
					m_loopPos[0] -= MidiTime::ticksPerTact();
				else
					m_loopPos[1] += MidiTime::ticksPerTact();
			}
			update();
			break;
		}
	case SelectSongTCO:
			emit regionSelectedFromPixels( m_initalXSelect , event->x() );
		break;

		default:
			break;
	}
}