* do not show messages about missing plugins when previewing presets (closes #2110203)

* clear effect view before loading settings in effectChain



git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1612 0778d3d1-df1d-0410-868b-ea421aaaa00d

include/effect_chain.h

@@ -27,15 +27,16 @@
 #define _EFFECT_CHAIN_H
 
 #include "mv_base.h"
-#include "journalling_object.h"
+#include "serializing_object.h"
 #include "mixer.h"
 #include "automatable_model.h"
 
 class effect;
 
 
-class effectChain : public journallingObject, public model
+class effectChain : public model, public serializingObject
 {
+	Q_OBJECT
 public:
 	effectChain( model * _parent );
 	virtual ~effectChain();
@@ -68,6 +69,10 @@ private:
 
 	friend class effectRackView;
 
+
+signals:
+	void aboutToClear( void );
+
 } ;
 
 #endif

include/effect_rack_view.h

@@ -45,10 +45,9 @@ public:
 	effectRackView( effectChain * _model, QWidget * _parent = NULL );
 	virtual ~effectRackView();
 
-	void clearViews( void );
-
 
 public slots:
+	void clearViews( void );
 	void moveUp( effectView * _view );
 	void moveDown( effectView * _view );
 	void deletePlugin( effectView * _view );

include/engine.h

@@ -60,6 +60,16 @@ public:
 		return( s_hasGUI );
 	}
 
+	static void setSuppressMessages( bool _on )
+	{
+		s_suppressMessages = _on;
+	}
+
+	static bool suppressMessages( void )
+	{
+		return !s_hasGUI || s_suppressMessages;
+	}
+
 	// core
 	static mixer * getMixer( void )
 	{
@@ -151,6 +161,7 @@ public:
 
 private:
 	static bool s_hasGUI;
+	static bool s_suppressMessages;
 	static float s_framesPerTick;
 
 	// core