From f352c7ecc5576b043679c04de1b262ee8804da44 Mon Sep 17 00:00:00 2001
From: Tobias Doerffel <tobias.doerffel@gmail.com>
Date: Wed, 20 Aug 2008 11:27:34 +0000
Subject: [PATCH] only skip GUI-updates when connected to frequently changing
 controllers

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1449 0778d3d1-df1d-0410-868b-ea421aaaa00d
---
 include/controller.h     | 15 ++++++++++++++-
 src/gui/widgets/knob.cpp |  2 ++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/include/controller.h b/include/controller.h
index d022c88be..7b13f25b2 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -74,11 +74,24 @@ public:
 		m_sampleExact = _exact;
 	}
 
-	ControllerTypes type( void ) const
+	inline ControllerTypes type( void ) const
 	{
 		return( m_type );
 	}
 
+	// return whether this controller updates models frequently - used for
+	// determining when to update GUI
+	inline bool frequentUpdates( void ) const
+	{
+		switch( m_type )
+		{
+			case LfoController: return( TRUE );
+			case PeakController: return( TRUE );
+			default:
+				break;
+		}
+		return( FALSE );
+	}
 
 	virtual const QString & name( void ) const
 	{
diff --git a/src/gui/widgets/knob.cpp b/src/gui/widgets/knob.cpp
index da9307838..653742e92 100644
--- a/src/gui/widgets/knob.cpp
+++ b/src/gui/widgets/knob.cpp
@@ -603,6 +603,8 @@ void knob::enterValue( void )
 void knob::friendlyUpdate( void )
 {
 	if( model()->getControllerConnection() == NULL ||
+		model()->getControllerConnection()->getController()->
+						frequentUpdates() == FALSE ||
 				controller::runningFrames() % (256*4) == 0 )
 	{
 		update();