do `, tab support in ScreenDebugOverlay

stepmania/src/GameLoop.cpp

@@ -39,6 +39,12 @@ static bool UserQuit()
 
 void HandleInputEvents( float fDeltaTime );
 
+static float g_fUpdateRate = 1;
+void GameLoop::SetUpdateRate( float fUpdateRate )
+{
+	g_fUpdateRate = fUpdateRate;
+}
+
 static void CheckGameLoopTimerSkips( float fDeltaTime )
 {
 	if( !PREFSMAN->m_bLogSkips )
@@ -137,17 +143,7 @@ void GameLoop::GameLoop()
 		
 		CheckGameLoopTimerSkips( fDeltaTime );
 
-		if( INPUTFILTER->IsBeingPressed( DeviceInput(DEVICE_KEYBOARD, KEY_TAB) ) )
-		{
-			if( INPUTFILTER->IsBeingPressed( DeviceInput(DEVICE_KEYBOARD, KEY_ACCENT) ) )
-				fDeltaTime = 0; /* both; stop time */
-			else
-				fDeltaTime *= 4;
-		}
-		else if( INPUTFILTER->IsBeingPressed( DeviceInput(DEVICE_KEYBOARD, KEY_ACCENT) ) )
-		{
-			fDeltaTime /= 4;
-		}
+		fDeltaTime *= g_fUpdateRate;
 
 		CheckFocus();
 

stepmania/src/GameLoop.h

@@ -6,6 +6,7 @@
 namespace GameLoop
 {
 	void GameLoop();
+	void SetUpdateRate( float fUpdateRate );
 	void StartConcurrentRendering();
 	void FinishConcurrentRendering();
 };

stepmania/src/ScreenDebugOverlay.cpp

@@ -24,6 +24,7 @@
 #include "Profile.h"
 #include "SongManager.h"
 #include "SubscriptionManager.h"
+#include "GameLoop.h"
 
 static bool g_bIsDisplayed = false;
 static bool g_bIsSlow = false;
@@ -194,6 +195,23 @@ void ScreenDebugOverlay::Init()
 
 void ScreenDebugOverlay::Update( float fDeltaTime )
 {
+	{
+		float fRate = 1;
+		if( INPUTFILTER->IsBeingPressed( DeviceInput(DEVICE_KEYBOARD, KEY_TAB) ) )
+		{
+			if( INPUTFILTER->IsBeingPressed( DeviceInput(DEVICE_KEYBOARD, KEY_ACCENT) ) )
+				fRate = 0; /* both; stop time */
+			else
+				fRate *= 4;
+		}
+		else if( INPUTFILTER->IsBeingPressed( DeviceInput(DEVICE_KEYBOARD, KEY_ACCENT) ) )
+		{
+			fRate /= 4;
+		}
+
+		GameLoop::SetUpdateRate( fRate );
+	}
+
 	bool bCenteringNeedsUpdate = g_fImageScaleCurrent != g_fImageScaleDestination;
 	fapproach( g_fImageScaleCurrent, g_fImageScaleDestination, fDeltaTime );
 	if( bCenteringNeedsUpdate )