add progress update

stepmania/src/ScreenReloadSongs.cpp

@@ -4,6 +4,41 @@
 #include "SongManager.h"
 #include "UnlockSystem.h"
 #include "ScreenManager.h"
+#include "RageTimer.h"
+#include "RageLog.h"
+#include "ThemeManager.h"
+
+#include "arch/LoadingWindow/LoadingWindow.h"
+
+static const int DrawFrameRate = 20;
+class ScreenReloadSongsLoadingWindow: public LoadingWindow
+{
+	RageTimer m_LastDraw;
+	BitmapText &m_BitmapText;
+
+public:
+	ScreenReloadSongsLoadingWindow( BitmapText &bt ):
+		m_BitmapText(bt)
+	{
+	}
+
+	void SetText( CString str )
+	{
+		m_BitmapText.SetText( str );
+		Paint();
+	}
+
+	void Paint()
+	{
+		/* We load songs much faster than we draw frames.  Cap the draw rate, so we don't
+		 * slow down the reload. */
+		if( m_LastDraw.PeekDeltaTime() < 1.0f/DrawFrameRate )
+			return;
+		m_LastDraw.GetDeltaTime();
+
+		SCREENMAN->Draw();
+	}
+};
 
 /* This could be cleaned up: show progress, for example.  Let's not use
  * this for the initial load, since we don't want to start up the display
@@ -11,16 +46,32 @@
  * computer while songs load. */
 ScreenReloadSongs::ScreenReloadSongs( CString sClassName ): Screen(sClassName)
 {
-	m_FirstUpdate = true;
+	m_iUpdates = 0;
+
+	m_Loading.LoadFromFont( THEME->GetPathF("Common", "normal") );
+	m_Loading.SetXY( CENTER_X, CENTER_Y );
+	this->AddChild( &m_Loading );
+
+	m_LoadingWindow = new ScreenReloadSongsLoadingWindow( m_Loading );
 }
 
+ScreenReloadSongs::~ScreenReloadSongs()
+{
+	delete m_LoadingWindow;
+}
+
+
 void ScreenReloadSongs::Update( float fDeltaTime )
 {
-	if( !m_FirstUpdate )
-		return;
+	Screen::Update( fDeltaTime );
 
-	m_FirstUpdate = false;
-	SONGMAN->Reload();
+	/* Start the reload on the second update.  On the first, 0, SCREENMAN->Draw won't draw. */
+	++m_iUpdates;
+	if( m_iUpdates != 2 )
+		return;
+	ASSERT( !IsFirstUpdate() );
+
+	SONGMAN->Reload( m_LoadingWindow );
 	UNLOCKMAN->UpdateSongs();
 	SCREENMAN->SetNewScreen( "ScreenTitleMenu" );
 }