* 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

src/core/effect_chain.cpp

@@ -1,5 +1,3 @@
-#ifndef SINGLE_SOURCE_COMPILE
-
 /*
  * effect_chain.cpp - class for processing and effects chain
  *
@@ -38,6 +36,7 @@
 
 effectChain::effectChain( model * _parent ) :
 	model( _parent ),
+	serializingObject(),
 	m_enabledModel( FALSE, NULL, tr( "Effects enabled" ) )
 {
 }
@@ -253,7 +252,9 @@ bool effectChain::isRunning( void )
 
 void effectChain::clear( void )
 {
-	m_enabledModel.setValue( FALSE );
+	emit aboutToClear();
+
+	m_enabledModel.setValue( false );
 	for( int i = 0; i < m_effects.count(); ++i )
 	{
 		delete m_effects[i];
@@ -262,4 +263,6 @@ void effectChain::clear( void )
 }
 
 
-#endif
+
+#include "moc_effect_chain.cxx"
+

src/core/engine.cpp

@@ -45,7 +45,8 @@
 #include "song.h"
 
 
-bool engine::s_hasGUI = TRUE;
+bool engine::s_hasGUI = true;
+bool engine::s_suppressMessages = false;
 float engine::s_framesPerTick;
 mixer * engine::s_mixer = NULL;
 fxMixer * engine::s_fxMixer = NULL;

src/core/preset_preview_play_handle.cpp

@@ -120,6 +120,8 @@ presetPreviewPlayHandle::presetPreviewPlayHandle( const QString & _preset_file,
 	const bool j = engine::getProjectJournal()->isJournalling();
 	engine::getProjectJournal()->setJournalling( FALSE );
 
+	engine::setSuppressMessages( true );
+
 	if( _load_by_plugin )
 	{
 		instrument * i = s_previewTC->previewInstrumentTrack()->
@@ -145,6 +147,8 @@ presetPreviewPlayHandle::presetPreviewPlayHandle( const QString & _preset_file,
 				mmp.content().firstChild().toElement() );
 	}
 
+	engine::setSuppressMessages( false );
+
 	// make sure, our preset-preview-track does not appear in any MIDI-
 	// devices list, so just disable receiving/sending MIDI-events at all
 	s_previewTC->previewInstrumentTrack()->m_midiPort.setMode(

src/gui/widgets/effect_rack_view.cpp

@@ -246,6 +246,8 @@ void effectRackView::modelChanged( void )
 {
 	clearViews();
 	m_effectsGroupBox->setModel( &fxChain()->m_enabledModel );
+	connect( fxChain(), SIGNAL( aboutToClear() ),
+			this, SLOT( clearViews() ) );
 	update();
 }