moved peridic update-timer from songEditor to mainWindow

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1567 0778d3d1-df1d-0410-868b-ea421aaaa00d

src/gui/widgets/visualization_widget.cpp

@@ -25,18 +25,15 @@
  */
 
 
-#include <QtCore/QTimer>
 #include <QtGui/QMouseEvent>
 #include <QtGui/QPainter>
-#include <QtGui/QPixmap>
 
 #include "visualization_widget.h"
+#include "main_window.h"
 #include "embed.h"
 #include "engine.h"
-#include "templates.h"
 #include "tooltip.h"
 #include "song.h"
-#include "song_editor.h"
 
 
 
@@ -99,7 +96,7 @@ void visualizationWidget::setActive( bool _active )
 	m_active = _active;
 	if( m_active )
 	{
-		connect( engine::getSongEditor(),
+		connect( engine::getMainWindow(),
 					SIGNAL( periodicUpdate() ),
 					this, SLOT( update() ) );
 		connect( engine::getMixer(),
@@ -108,7 +105,7 @@ void visualizationWidget::setActive( bool _active )
 	}
 	else
 	{
-		disconnect( engine::getSongEditor(),
+		disconnect( engine::getMainWindow(),
 					SIGNAL( periodicUpdate() ),
 					this, SLOT( update() ) );
 		disconnect( engine::getMixer(),