fix to work with new AutoScreenMessages

better adding, removing, or selecting elements when or resulting in an empty wheel
style changes in regards to some curly brackets

stepmania/src/WheelBase.cpp

@@ -76,6 +76,7 @@ WheelBase::~WheelBase()
 
 void WheelBase::Load( CString sType ) 
 {
+	m_isEmpty = true;
 	LOG->Trace( "MusicWheel::Load('%s')", sType.c_str() );
 
 	SWITCH_SECONDS				.Load(sType,"SwitchSeconds");
@@ -111,7 +112,8 @@ void WheelBase::Load( CString sType )
 	FOREACH( WheelItemBase*, m_WheelBaseItems, i )
 		SAFE_DELETE( *i );
 	m_WheelBaseItems.clear();
-	for( int i=0; i<NUM_WHEEL_ITEMS; i++ ) {
+	for( int i=0; i<NUM_WHEEL_ITEMS; i++ )
+	{
 		m_WheelBaseItems.push_back( new WheelItemBase );
 	}
 
@@ -252,7 +254,8 @@ void WheelBase::UpdateScrollbar()
 	int total_num_items = m_WheelBaseItemsData.size();
 	float item_at=m_iSelection - m_fPositionOffsetFromSelection;
 
-	if(NUM_WHEEL_ITEMS >= total_num_items) {
+	if(NUM_WHEEL_ITEMS >= total_num_items)
+	{
 		m_ScrollBar.SetPercentage( 0, 1 );
 	} else {
 		float size = float(NUM_WHEEL_ITEMS) / total_num_items;
@@ -412,6 +415,8 @@ bool WheelBase::Select()	// return true if this selection ends the screen
 
 	m_Moving = 0;
 
+	if (!m_isEmpty)
+	{
 		switch( m_WheelBaseItemsData[m_iSelection]->m_Type )
 		{
 		case TYPE_GENERIC:
@@ -432,6 +437,8 @@ bool WheelBase::Select()	// return true if this selection ends the screen
 			ASSERT(0);
 			return false;
 		}
+	}
+	return false;
 }
 
 int WheelBase::IsMoving() const
@@ -582,14 +589,23 @@ void WheelBase::Move(int n)
 		ChangeMusic(m_Moving);
 }
 
-void WheelBase::AddItem(WheelItemBaseData* itemdata) {
+void WheelBase::AddItem(WheelItemBaseData* itemdata)
+{
 	int visible, index;
 	m_WheelBaseItemsData.push_back(itemdata);
 	visible = FirstVisibleIndex();
 	index = m_WheelBaseItemsData.size();
 
+	if (m_isEmpty)
+	{
+		m_isEmpty = false;
+		//Remove the - Empty - field when we add an object from an empty state.
+		RemoveItem(0);
+	}
+
 	//If the item was shown in the wheel, rebuild the wheel
-	if ((0 <= (index - visible)) && ((index - visible) < NUM_WHEEL_ITEMS)) {
+	if ((0 <= (index - visible)) && ((index - visible) < NUM_WHEEL_ITEMS))
+	{
 			RebuildWheelItems();
 			SCREENMAN->SystemMessageNoAnimate("redraw");
 	}
@@ -611,7 +627,8 @@ void WheelBase::ChangeMusic(int dist)
 		m_soundChangeMusic.Play();
 }
 
-void WheelBase::BuildWheelItemsData( vector<WheelItemBaseData*> &arrayWheelItemDatas ) {
+void WheelBase::BuildWheelItemsData( vector<WheelItemBaseData*> &arrayWheelItemDatas )
+{
 	if( arrayWheelItemDatas.empty() )
 	{
 		arrayWheelItemDatas.push_back( new WheelItemBaseData(TYPE_GENERIC, "- EMPTY -", RageColor(1,0,0,1)) );
@@ -684,11 +701,18 @@ void WheelBase::RebuildWheelItems( int dist )
 
 WheelItemBaseData* WheelBase::LastSelected( )
 {
+	if (m_isEmpty)
+		return NULL;
+	else
 		return m_LastSelection;
 }
 
-void WheelBase::RemoveItem( int index ) {
+void WheelBase::RemoveItem( int index )
-	if (index < m_WheelBaseItemsData.size()) {
+{
+	if (!m_isEmpty)
+	{
+		if (index < m_WheelBaseItemsData.size())
+		{
 			vector<WheelItemBaseData *>::iterator i = m_WheelBaseItemsData.begin();
 			i += index;
 
@@ -699,11 +723,19 @@ void WheelBase::RemoveItem( int index ) {
 			SAFE_DELETE( *i );
 			m_WheelBaseItemsData.erase(i);
 
+			if (m_WheelBaseItemsData.size() < 1)
+			{
+				m_isEmpty = true;
+				BuildWheelItemsData(m_WheelBaseItemsData);
+			}
+
 			RebuildWheelItems();
 		}
+	}
 }
 
-int WheelBase::FirstVisibleIndex() {
+int WheelBase::FirstVisibleIndex()
+{
 		// rewind to first index that will be displayed;
 		int iFirstVisibleIndex = m_iSelection;
 		if( m_iSelection > int(m_WheelBaseItemsData.size()-1) )

stepmania/src/WheelBase.h

@@ -16,7 +16,7 @@
 #include "WheelItemBase.h"
 #include "ThemeMetric.h"
 
-extern const AutoScreenMessage SM_SongChanged;		// TODO: Replace this with a Message and MESSAGEMAN
+AutoScreenMessage( SM_SongChanged );		// TODO: Replace this with a Message and MESSAGEMAN
 
 //struct CompareSongPointerArrayBySectionName;
 
@@ -67,6 +67,7 @@ protected:
 	vector<WheelItemBase *> m_WheelBaseItems;
 	WheelItemBaseData* m_LastSelection;
 	
+	bool				m_isEmpty;
 	int					m_iSelection;		// index into m_CurWheelItemBaseData
 	CString				m_sExpandedSectionName;