ResourcePreviewer: disable journalling when previewing

Globally disable journalling when previewing a ResourceItem (i.e. load
a preset, sample etc.).

Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>

include/ResourcePreviewer.h

@@ -46,7 +46,7 @@ private:
 	{
 		virtual QString nodeName( void ) const
 		{
-			return( "PreviewTrackContainer" );
+			return "PreviewTrackContainer";
 		}
 	} ;
 

src/core/ResourcePreviewer.cpp

@@ -25,8 +25,10 @@
 
 #include "ResourcePreviewer.h"
 #include "ResourceItem.h"
+#include "engine.h"
 #include "instrument_track.h"
 #include "mmp.h"
+#include "project_journal.h"
 
 
 ResourcePreviewer::ResourcePreviewer() :
@@ -48,6 +50,10 @@ ResourcePreviewer::ResourcePreviewer() :
 
 void ResourcePreviewer::preview( ResourceItem * _item )
 {
+	const bool j = engine::getProjectJournal()->isJournalling();
+	engine::getProjectJournal()->setJournalling( false );
+	engine::setSuppressMessages( true );
+
 	switch( _item->type() )
 	{
 		case ResourceItem::TypePreset:
@@ -60,6 +66,9 @@ void ResourcePreviewer::preview( ResourceItem * _item )
 							midiPort::Disabled );
 			break;
 	}
+
+	engine::setSuppressMessages( false );
+	engine::getProjectJournal()->setJournalling( j );
 }