Common GUI code for some stuff

+ tabbed container screen
+ tabs
+ arrow buttons
+ Rewritten alloy furnace GUI to use the new stuff

src/java/mmm/tech/base/TBAlloyFurnaceBlock.java

@@ -424,7 +424,7 @@ public class TBAlloyFurnaceBlock
 	}
 
 
-	public static boolean isPowered( int meta )
+	public static boolean isPowered( final int meta )
 	{
 		return ( meta & 8 ) == 8;
 	}

src/java/mmm/tech/base/TBAlloyFurnaceContainer.java

@@ -2,16 +2,14 @@ package mmm.tech.base;
 
 
 import mmm.materials.MAlloyRecipe;
-import mmm.utils.UContainers;
 import mmm.utils.UInventoryDisplay;
 import mmm.utils.UInventoryGrid;
-import mmm.utils.slots.USDisplay;
-import mmm.utils.slots.USFuel;
-import mmm.utils.slots.USOutput;
-import mmm.utils.slots.USVisibilityController;
+import mmm.utils.gui.UGContainer;
+import mmm.utils.gui.UGSlotDisplay;
+import mmm.utils.gui.UGSlotFuel;
+import mmm.utils.gui.UGSlotOutput;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.entity.player.InventoryPlayer;
-import net.minecraft.inventory.Container;
 import net.minecraft.inventory.Slot;
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntityFurnace;
@@ -22,13 +20,12 @@ import net.minecraft.world.World;
 
 
 public class TBAlloyFurnaceContainer
-		extends Container
+		extends UGContainer
 {
 	public final TBAlloyFurnaceTileEntity tileEntity;
 	public final World world;
 	public final BlockPos position;
 
-	public final USVisibilityController visibilityController;
 	public final UInventoryGrid input;
 	public final UInventoryGrid fuel;
 	public final UInventoryGrid output;
@@ -41,36 +38,29 @@ public class TBAlloyFurnaceContainer
 		this.world = tileEntity.getWorld( );
 		this.position = tileEntity.getPos( );
 
-		this.visibilityController = new USVisibilityController( this.inventorySlots );
-		this.visibilityController.startGroup( );
-		UContainers.addPlayerInventory( //
-				( i , x , y ) -> this.addSlotToContainer( new Slot( playerInv , i , x , y ) ) , //
-				8 , 112 );
+		this.addPlayerInventory( Slot::new , playerInv , 8 , 112 );
+		this.slotGroups.nextGroup( );
 
-		this.visibilityController.startGroup( );
 		this.input = tileEntity.input;
-		UContainers.addGrid( //
-				( i , x , y ) -> this.addSlotToContainer( new Slot( this.input , i , x , y ) ) , //
+		this.addGrid( Slot::new , this.input , //
 				this.input.width , this.input.height , 0 , 12 , 8 );
 		this.fuel = tileEntity.fuel;
-		UContainers.addGrid( //
-				( i , x , y ) -> this.addSlotToContainer( new USFuel( this.fuel , i , x , y ) ) , //
+		this.addGrid( UGSlotFuel::new , this.fuel , //
 				this.fuel.width , this.fuel.height , 0 , 80 , 62 );
 		this.output = tileEntity.output;
-		UContainers.addGrid( //
-				( i , x , y ) -> {
-					this.addSlotToContainer( new USOutput( playerInv.player , this.output , i , x , y ) );
-				} , this.output.width , this.output.height , 0 , 130 , 8 );
+		this.addGrid( //
+				( inv , i , x , y ) -> new UGSlotOutput( playerInv.player , inv , i , x , y ) , //
+				this.output , this.output.width , this.output.height , 0 , 130 , 8 );
 
 		this.recipe = new UInventoryDisplay( "Recipe" , 7 );
-		this.visibilityController.startGroup( );
-		UContainers.addGrid( //
-				( i , x , y ) -> this.addSlotToContainer( new USDisplay( this.recipe , i , x , y ) ) , //
+		this.slotGroups.nextGroup( );
+		this.addGrid( UGSlotDisplay::new , this.recipe , //
 				3 , 2 , 0 , 25 , 37 , 8 , 8 );
-		this.addSlotToContainer( new USDisplay( this.recipe , 6 , 131 , 49 ) );
+		this.addSlotToContainer( new UGSlotDisplay( this.recipe , 6 , 131 , 49 ) );
 
-		this.visibilityController.finalizeGroups( );
-		this.visibilityController.hideGroup( 2 );
+		this.slotGroups.endGroups( );
+		this.slotGroups.showGroup( 0 ); // FIXME remove this
+		this.slotGroups.showGroup( 1 );
 	}
 
 

src/java/mmm/tech/base/TBAlloyFurnaceGui.java

@@ -1,25 +1,21 @@
 package mmm.tech.base;
 
 
-import java.io.IOException;
 import java.util.ArrayList;
-import java.util.List;
-
-import com.google.common.collect.Lists;
 
 import mmm.Mmm;
 import mmm.materials.MAlloyRecipe;
 import mmm.utils.URegistry;
-import net.minecraft.client.Minecraft;
+import mmm.utils.gui.A_UGTab;
+import mmm.utils.gui.A_UGTabbedContainerScreen;
+import mmm.utils.gui.UGArrowButton;
 import net.minecraft.client.gui.GuiButton;
 import net.minecraft.client.gui.GuiTextField;
-import net.minecraft.client.gui.inventory.GuiContainer;
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.resources.I18n;
 import net.minecraft.entity.player.InventoryPlayer;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.ResourceLocation;
-import net.minecraft.util.text.TextFormatting;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
 
@@ -27,131 +23,90 @@ import net.minecraftforge.fml.relauncher.SideOnly;
 
 @SideOnly( Side.CLIENT )
 public class TBAlloyFurnaceGui
-		extends GuiContainer
+		extends A_UGTabbedContainerScreen< TBAlloyFurnaceContainer >
 {
-	@SideOnly( Side.CLIENT )
-	private static enum Tab {
-		MAIN( 191 , 0 , 1 , "container.mmm.alloy_furnace.contents" ) ,
-		RECIPE( 207 , 0 , 2 , "container.mmm.alloy_furnace.recipe" ) ,
-		CONFIG( 223 , 0 , 2 , "gui.mmm.configure" );
-
-		public final int iconX;
-		public final int iconY;
-		public final int slotGroup;
-		public final String tooltip;
-
-
-		private Tab( final int iconX , final int iconY , final int slotGroup , final String tooltip )
-		{
-			this.iconX = iconX;
-			this.iconY = iconY;
-			this.slotGroup = slotGroup;
-			this.tooltip = tooltip;
-		}
-	}
-
-	@SideOnly( Side.CLIENT )
-	private static class ArrowButton
-			extends GuiButton
-	{
-		private final boolean forward;
-
-
-		public ArrowButton( final int buttonID , final int x , final int y , final boolean forward )
-		{
-			super( buttonID , x , y , 12 , 19 , "" );
-			this.forward = forward;
-		}
-
-
-		@Override
-		public void drawButton( final Minecraft mc , final int mouseX , final int mouseY )
-		{
-			if ( this.visible ) {
-				mc.getTextureManager( ).bindTexture( TBAlloyFurnaceGui.TEXTURES[ 1 ] );
-				GlStateManager.color( 1f , 1f , 1f , 1f );
-
-				int texX = 176;
-				if ( !this.enabled ) {
-					texX += this.width * 2;
-				} else if ( mouseX >= this.xPosition && mouseY >= this.yPosition && mouseX < this.xPosition + this.width
-						&& mouseY < this.yPosition + this.height ) {
-					texX += this.width;
-				}
-
-				int texY = 0;
-				if ( !this.forward ) {
-					texY += this.height;
-				}
-
-				this.drawTexturedModalRect( this.xPosition , this.yPosition , texX , texY , this.width , this.height );
-			}
-		}
-	}
-
 	private static final ResourceLocation TEXTURES[] = {
 			new ResourceLocation( Mmm.ID , "textures/gui/alloy_furnace_1.png" ) ,
 			new ResourceLocation( Mmm.ID , "textures/gui/alloy_furnace_2.png" ) ,
 			new ResourceLocation( Mmm.ID , "textures/gui/alloy_furnace_3.png" ) ,
 	};
 
-	private static final TBAlloyFurnaceGui.Tab TABS[] = TBAlloyFurnaceGui.Tab.values( );
-
-	private static final int TAB_WIDTH = 26;
-	private static final int TAB_HEIGHT = 26;
-	private static final int TAB_BORDER = 4;
-	private static final int TABS_TEXTURE_X = 176;
-	private static final int TABS_TEXTURE_Y = 45;
-	private static final int TAB_ICON_X = 5;
-	private static final int TAB_ICON_Y = 5;
-	private static final int TAB_ICON_WIDTH = 16;
-	private static final int TAB_ICON_HEIGHT = 16;
-
-	private final TBAlloyFurnaceContainer container;
-
-	private TBAlloyFurnaceGui.Tab selectedTab = Tab.MAIN;
-
-	private ArrowButton bPrevious;
-	private ArrowButton bNext;
-	private GuiButton bConfirm;
-	private GuiTextField tfSearch;
-	private ArrayList< MAlloyRecipe > recipes;
-	private int currentRecipe = 0;
-	private String searchString = "";
-
-
-	public TBAlloyFurnaceGui( final InventoryPlayer inventoryPlayer , final TBAlloyFurnaceTileEntity tileEntity )
+	@SideOnly( Side.CLIENT )
+	private static class MainTab
+			extends A_UGTab
 	{
-		super( new TBAlloyFurnaceContainer( inventoryPlayer , tileEntity ) );
-		this.xSize = 176;
-		this.ySize = 194;
 
-		this.container = (TBAlloyFurnaceContainer) this.inventorySlots;
-		for ( final TBAlloyFurnaceGui.Tab tab : TBAlloyFurnaceGui.Tab.values( ) ) {
-			if ( tab != this.selectedTab ) {
-				this.container.visibilityController.hideGroup( tab.slotGroup );
-			}
-		}
-
-		this.recipes = MAlloyRecipe.REGISTRY.getRecipes( );
-		this.setRecipe( this.getRecipeIndex( tileEntity.recipe ) );
+		private MainTab( )
+		{
+			super( );
+			this.setBackground( TBAlloyFurnaceGui.TEXTURES[ 0 ] ) //
+					.setHeight( 194 ) //
+					.setIconPosition( 191 , 0 )//
+					.setSlotGroups( 0 , 1 ) //
+					.setTooltip( "container.mmm.alloy_furnace.contents" );
 		}
 
 
 		@Override
-	public void initGui( )
+		public void drawBackground( final float partialTicks , final int mouseX , final int mouseY )
 		{
-		super.initGui( );
+			super.drawBackground( partialTicks , mouseX , mouseY );
 
-		final int x = ( this.width - this.xSize ) / 2;
-		final int y = ( this.height - this.ySize ) / 2;
+			final int x = ( this.parent.width - this.parent.getXSize( ) ) / 2;
+			final int y = ( this.parent.height - this.height ) / 2;
 
-		this.bPrevious = new ArrowButton( 1 , 8 + x , 47 + y , false );
-		this.bNext = new ArrowButton( 2 , 156 + x , 47 + y , true );
+			final TBAlloyFurnaceContainer container = (TBAlloyFurnaceContainer) this.parent.container;
+			final TileEntity atPos = container.world.getTileEntity( container.position );
+			if ( atPos instanceof TBAlloyFurnaceTileEntity ) {
+				final TBAlloyFurnaceTileEntity te = (TBAlloyFurnaceTileEntity) atPos;
+				// Burn
+				if ( te.isBurning( ) ) {
+					final int burn = te.getBurnProgress( 13 );
+					this.drawTexturedModalRect( x + 89 , y + 38 + 13 - burn , 176 , 28 - burn , 14 , burn + 1 );
+				}
+
+				// Alloying progress
+				if ( te.isAlloying( ) ) {
+					final int alloy = te.getAlloyingProgress( 47 );
+					this.drawTexturedModalRect( x + 73 , y + 17 , 176 , 29 , alloy + 1 , 16 );
+				}
+			}
+		}
+
+	}
+
+	private static class RecipeTab
+			extends A_UGTab
+	{
+
+		private UGArrowButton bPrevious;
+		private UGArrowButton bNext;
+		private GuiButton bConfirm;
+		private GuiTextField tfSearch;
+
+
+		private RecipeTab( )
+		{
+			super( );
+			this.setBackground( TBAlloyFurnaceGui.TEXTURES[ 1 ] ) //
+					.setHeight( 194 ) //
+					.setIconPosition( 207 , 0 )//
+					.setSlotGroups( 0 , 2 ) //
+					.setTooltip( "container.mmm.alloy_furnace.recipe" );
+		}
+
+
+		@Override
+		public void initGui( final int x , final int y )
+		{
+			super.initGui( x , y );
+
+			this.bPrevious = new UGArrowButton( 1 , 8 + x , 47 + y , false );
+			this.bNext = new UGArrowButton( 2 , 156 + x , 47 + y , true );
 			this.bConfirm = new GuiButton( 3 , 24 + x , 84 + y , 128 , 20 ,
 					I18n.format( "container.mmm.alloy_furnace.select" ) );
 
-		this.tfSearch = new GuiTextField( 4 , this.fontRendererObj , 24 + x , 9 + y , 128 , 20 );
+			this.tfSearch = new GuiTextField( 4 , this.parent.getFontRenderer( ) , 24 + x , 9 + y , 128 , 20 );
 			this.tfSearch.setTextColor( 0xffffff );
 			this.tfSearch.setDisabledTextColour( 0x7f7f7f );
 			this.tfSearch.setEnableBackgroundDrawing( true );
@@ -160,45 +115,110 @@ public class TBAlloyFurnaceGui
 			this.bPrevious.visible = this.bNext.visible = this.bConfirm.visible = false;
 			this.tfSearch.setVisible( false );
 
-		this.buttonList.add( this.bNext );
-		this.buttonList.add( this.bPrevious );
-		this.buttonList.add( this.bConfirm );
+			this.buttons.add( this.bNext );
+			this.buttons.add( this.bPrevious );
+			this.buttons.add( this.bConfirm );
 
-		this.enableConfigButtons( );
+			this.enableButtons( );
 		}
 
 
 		@Override
-	public void drawScreen( final int mouseX , final int mouseY , final float partialTicks )
+		public void drawBackground( final float partialTicks , final int mouseX , final int mouseY )
 		{
-		super.drawScreen( mouseX , mouseY , partialTicks );
-
-		for ( final TBAlloyFurnaceGui.Tab tab : TBAlloyFurnaceGui.Tab.values( ) ) {
-			if ( this.isInTab( tab , mouseX , mouseY ) ) {
-				final List< String > list = Lists.< String > newArrayList( );
-				list.add( TextFormatting.WHITE + I18n.format( tab.tooltip ) );
-				this.drawHoveringText( list , mouseX , mouseY );
-				break;
-			}
-		}
+			super.drawBackground( partialTicks , mouseX , mouseY );
+			GlStateManager.disableBlend( );
+			this.tfSearch.drawTextBox( );
 		}
 
 
-	private void enableConfigButtons( )
+		@Override
+		public void onSelected( )
 		{
-		if ( this.bNext != null ) {
-			final boolean visible = this.selectedTab == Tab.RECIPE;
-			this.bNext.visible = this.bPrevious.visible = this.bConfirm.visible = visible;
-			this.tfSearch.setVisible( visible );
+			super.onSelected( );
+			this.tfSearch.setVisible( true );
+			this.enableButtons( );
+		}
 
-			if ( this.recipes.isEmpty( ) ) {
+
+		@Override
+		public void onDeselected( )
+		{
+			super.onDeselected( );
+			this.tfSearch.setVisible( false );
+		}
+
+
+		@Override
+		public void onMouseClicked( final int mouseX , final int mouseY , final int mouseButton )
+		{
+			this.tfSearch.mouseClicked( mouseX , mouseY , mouseButton );
+		}
+
+
+		@Override
+		public boolean onKeyTyped( final char typedChar , final int keyCode )
+		{
+			if ( this.tfSearch.textboxKeyTyped( typedChar , keyCode ) ) {
+				( (TBAlloyFurnaceGui) this.parent ).handleFiltering( this.tfSearch.getText( ) );
+				return true;
+			}
+			return false;
+		}
+
+
+		@Override
+		public boolean onActionPerformed( final GuiButton button )
+		{
+			final TBAlloyFurnaceGui gui = (TBAlloyFurnaceGui) this.parent;
+			if ( button == this.bNext ) {
+				gui.setRecipe( gui.currentRecipe + 1 );
+			} else if ( button == this.bPrevious ) {
+				gui.setRecipe( gui.currentRecipe - 1 );
+			} else if ( button == this.bConfirm ) {
+				final MAlloyRecipe recipe = gui.recipes.get( gui.currentRecipe );
+				URegistry.network.sendToServer( //
+						new TBAlloyFurnaceMessage( gui.container.position , recipe.name , true ) );
+				gui.container.tileEntity.recipe = recipe;
+			} else {
+				return false;
+			}
+
+			this.enableButtons( );
+			return true;
+		}
+
+
+		private void enableButtons( )
+		{
+			if ( this.bNext == null ) {
+				return;
+			}
+
+			final TBAlloyFurnaceGui gui = (TBAlloyFurnaceGui) this.parent;
+			if ( gui.recipes.isEmpty( ) ) {
 				this.bNext.enabled = this.bPrevious.enabled = this.bConfirm.enabled = false;
 			} else {
-				this.bNext.enabled = this.currentRecipe < this.recipes.size( ) - 1;
-				this.bPrevious.enabled = this.currentRecipe > 0;
-				this.bConfirm.enabled = this.currentRecipe != this.getRecipeIndex( this.container.tileEntity.recipe );
+				this.bNext.enabled = gui.currentRecipe < gui.recipes.size( ) - 1;
+				this.bPrevious.enabled = gui.currentRecipe > 0;
+				this.bConfirm.enabled = gui.currentRecipe != gui.getRecipeIndex( gui.container.tileEntity.recipe );
 			}
 		}
+
+	}
+
+	private ArrayList< MAlloyRecipe > recipes;
+	private int currentRecipe = 0;
+	private String searchString = "";
+
+
+	public TBAlloyFurnaceGui( final InventoryPlayer inventoryPlayer , final TBAlloyFurnaceTileEntity tileEntity )
+	{
+		super( new TBAlloyFurnaceContainer( inventoryPlayer , tileEntity ) , TBAlloyFurnaceGui.TEXTURES[ 0 ] ,
+				new MainTab( ) , new RecipeTab( ) );
+		this.xSize = 176;
+		this.recipes = MAlloyRecipe.REGISTRY.getRecipes( );
+		this.setRecipe( this.getRecipeIndex( tileEntity.recipe ) );
 	}
 
 
@@ -220,7 +240,7 @@ public class TBAlloyFurnaceGui
 		this.container.setCurrentRecipe( rName , false );
 		URegistry.network.sendToServer( //
 				new TBAlloyFurnaceMessage( this.container.position , rName , false ) );
-		this.enableConfigButtons( );
+		( (RecipeTab) this.tabs[ 1 ] ).enableButtons( );
 	}
 
 
@@ -230,101 +250,9 @@ public class TBAlloyFurnaceGui
 	}
 
 
-	@Override
-	protected void drawGuiContainerBackgroundLayer( final float partialTicks , final int mouseX , final int mouseY )
+	private void handleFiltering( final String input )
 	{
-		GlStateManager.color( 1f , 1f , 1f , 1f );
-		GlStateManager.enableBlend( );
-		GlStateManager.disableLighting( );
-
-		// Inactive tab
-		this.mc.getTextureManager( ).bindTexture( TBAlloyFurnaceGui.TEXTURES[ 0 ] );
-		for ( final TBAlloyFurnaceGui.Tab tab : TBAlloyFurnaceGui.TABS ) {
-			if ( tab != this.selectedTab ) {
-				this.drawTab( tab );
-			}
-		}
-
-		// Main panel
-		this.mc.getTextureManager( ).bindTexture( TBAlloyFurnaceGui.TEXTURES[ this.selectedTab.ordinal( ) ] );
-		this.drawTexturedModalRect( this.guiLeft , this.guiTop , 0 , 0 , this.xSize , this.ySize );
-
-		if ( this.selectedTab == Tab.MAIN ) {
-			final int x = ( this.width - this.xSize ) / 2;
-			final int y = ( this.height - this.ySize ) / 2;
-
-			final TileEntity atPos = this.container.world.getTileEntity( this.container.position );
-			if ( atPos instanceof TBAlloyFurnaceTileEntity ) {
-				final TBAlloyFurnaceTileEntity te = (TBAlloyFurnaceTileEntity) atPos;
-				// Burn
-				if ( te.isBurning( ) ) {
-					final int burn = te.getBurnProgress( 13 );
-					this.drawTexturedModalRect( x + 89 , y + 38 + 13 - burn , 176 , 28 - burn , 14 , burn + 1 );
-				}
-
-				// Alloying progress
-				if ( te.isAlloying( ) ) {
-					final int alloy = te.getAlloyingProgress( 47 );
-					this.drawTexturedModalRect( x + 73 , y + 17 , 176 , 29 , alloy + 1 , 16 );
-				}
-			}
-		} else {
-			GlStateManager.disableBlend( );
-			this.tfSearch.drawTextBox( );
-			GlStateManager.enableBlend( );
-			GlStateManager.color( 1f , 1f , 1f , 1f );
-		}
-
-		// Active tab
-		this.mc.getTextureManager( ).bindTexture( TBAlloyFurnaceGui.TEXTURES[ 0 ] );
-		this.drawTab( this.selectedTab );
-	}
-
-
-	@Override
-	protected void mouseClicked( final int mouseX , final int mouseY , final int mouseButton )
-			throws IOException
-	{
-		super.mouseClicked( mouseX , mouseY , mouseButton );
-
-		for ( final TBAlloyFurnaceGui.Tab tab : TBAlloyFurnaceGui.Tab.values( ) ) {
-			if ( this.selectedTab != tab && this.isInTab( tab , mouseX , mouseY ) ) {
-				this.selectTab( tab );
-				return;
-			}
-		}
-
-		if ( this.selectedTab == Tab.RECIPE ) {
-			this.tfSearch.mouseClicked( mouseX , mouseY , mouseButton );
-		}
-	}
-
-
-	private boolean isInTab( final TBAlloyFurnaceGui.Tab tab , final int mouseX , final int mouseY )
-	{
-		final int tabOffsetX = tab.ordinal( ) * TBAlloyFurnaceGui.TAB_WIDTH;
-		final int tabX = this.guiLeft + tabOffsetX + TBAlloyFurnaceGui.TAB_BORDER;
-		final int tabY = this.guiTop - TBAlloyFurnaceGui.TAB_HEIGHT + TBAlloyFurnaceGui.TAB_BORDER;
-		return mouseX >= tabX && mouseY >= tabY && mouseX <= tabX + TBAlloyFurnaceGui.TAB_WIDTH
-				&& mouseY <= tabY + TBAlloyFurnaceGui.TAB_HEIGHT;
-	}
-
-
-	@Override
-	protected void keyTyped( final char typedChar , final int keyCode )
-			throws IOException
-	{
-		if ( this.tfSearch.getVisible( ) && this.tfSearch.textboxKeyTyped( typedChar , keyCode ) ) {
-			this.handleFiltering( );
-		} else {
-			super.keyTyped( typedChar , keyCode );
-		}
-	}
-
-
-	private void handleFiltering( )
-	{
-		final String newText = this.tfSearch.getText( ).trim( ).toLowerCase( );
+		final String newText = input.trim( ).toLowerCase( );
 		if ( this.searchString.equals( newText ) ) {
 			return;
 		}
@@ -359,53 +287,4 @@ public class TBAlloyFurnaceGui
 		}
 	}
 
-
-	@Override
-	protected void actionPerformed( final GuiButton button )
-			throws IOException
-	{
-		if ( button == this.bNext ) {
-			this.setRecipe( this.currentRecipe + 1 );
-		} else if ( button == this.bPrevious ) {
-			this.setRecipe( this.currentRecipe - 1 );
-		} else if ( button == this.bConfirm ) {
-			final MAlloyRecipe recipe = this.recipes.get( this.currentRecipe );
-			URegistry.network.sendToServer(
-					new TBAlloyFurnaceMessage( this.container.tileEntity.getPos( ) , recipe.name , true ) );
-			this.container.tileEntity.recipe = recipe;
-		}
-
-		this.enableConfigButtons( );
-	}
-
-
-	private void drawTab( final TBAlloyFurnaceGui.Tab tab )
-	{
-		final boolean selected = this.selectedTab == tab;
-		final int tabOffsetX = tab.ordinal( ) * TBAlloyFurnaceGui.TAB_WIDTH;
-		final int tabX = this.guiLeft + tabOffsetX + TBAlloyFurnaceGui.TAB_BORDER;
-		final int tabY = this.guiTop - TBAlloyFurnaceGui.TAB_HEIGHT + TBAlloyFurnaceGui.TAB_BORDER;
-
-		this.drawTexturedModalRect( tabX , tabY , //
-				TBAlloyFurnaceGui.TABS_TEXTURE_X ,
-				TBAlloyFurnaceGui.TABS_TEXTURE_Y + ( selected ? TBAlloyFurnaceGui.TAB_HEIGHT : 0 ) , //
-				TBAlloyFurnaceGui.TAB_WIDTH , TBAlloyFurnaceGui.TAB_HEIGHT );
-
-		this.zLevel = 100f;
-		this.drawTexturedModalRect( tabX + TBAlloyFurnaceGui.TAB_ICON_X , tabY + TBAlloyFurnaceGui.TAB_ICON_Y , //
-				tab.iconX , tab.iconY , //
-				TBAlloyFurnaceGui.TAB_ICON_WIDTH , TBAlloyFurnaceGui.TAB_ICON_HEIGHT );
-
-		this.zLevel = 0;
-	}
-
-
-	private void selectTab( final TBAlloyFurnaceGui.Tab tab )
-	{
-		this.container.visibilityController //
-				.hideGroup( this.selectedTab.slotGroup ) //
-				.showGroup( tab.slotGroup );
-		this.selectedTab = tab;
-		this.enableConfigButtons( );
-	}
 }

src/java/mmm/tech/base/TBAlloyFurnaceTileEntity.java

@@ -59,7 +59,8 @@ public class TBAlloyFurnaceTileEntity
 
 
 	@Override
-	public boolean shouldRefresh( World world , BlockPos pos , IBlockState oldState , IBlockState newSate )
+	public boolean shouldRefresh( final World world , final BlockPos pos , final IBlockState oldState ,
+			final IBlockState newSate )
 	{
 		return ! ( newSate.getBlock( ) instanceof TBAlloyFurnaceBlock );
 	}

src/java/mmm/tech/base/TechBase.java

@@ -23,8 +23,8 @@ public class TechBase
 		ALLOY_FURNACE_BLOCK_ACTIVE = new TBAlloyFurnaceBlock( true );
 		ALLOY_FURNACE_ITEM = new ItemBlockSpecial( TechBase.ALLOY_FURNACE_BLOCK_INACTIVE )//
 				.setMaxStackSize( 16 )//
-				.setCreativeTab( ALLOY_FURNACE_BLOCK_INACTIVE.getCreativeTabToDisplayOn( ) );
-		URegistry.setIdentifiers( ALLOY_FURNACE_ITEM , "tech" , "base" , "alloy_furnace" );
+				.setCreativeTab( TechBase.ALLOY_FURNACE_BLOCK_INACTIVE.getCreativeTabToDisplayOn( ) );
+		URegistry.setIdentifiers( TechBase.ALLOY_FURNACE_ITEM , "tech" , "base" , "alloy_furnace" );
 		URegistry.addBlock( TechBase.ALLOY_FURNACE_BLOCK_INACTIVE , TechBase.ALLOY_FURNACE_ITEM );
 		URegistry.addBlock( TechBase.ALLOY_FURNACE_BLOCK_ACTIVE , null );
 		GameRegistry.registerTileEntity( TBAlloyFurnaceTileEntity.class , "mmm:tech/base/alloy_furnace" );

src/java/mmm/utils/UContainers.java

@@ -1,44 +0,0 @@
-package mmm.utils;
-
-
-public class UContainers
-{
-
-	public static interface SlotAdder
-	{
-		public void addSlot( int index , int x , int y );
-	}
-
-
-	public static void addPlayerInventory( final UContainers.SlotAdder slotAdder , final int x , final int y )
-	{
-		UContainers.addPlayerInventory( slotAdder , x , y , 4 );
-	}
-
-
-	public static void addPlayerInventory( final UContainers.SlotAdder slotAdder , final int x , final int y ,
-			final int spacing )
-	{
-		UContainers.addGrid( slotAdder , 9 , 3 , 9 , x , y ); // Main inventory
-		UContainers.addGrid( slotAdder , 9 , 1 , 0 , x , y + spacing + 54 ); // Quick bar
-	}
-
-
-	public static void addGrid( final UContainers.SlotAdder slotAdder , final int columns , final int rows ,
-			final int index , final int x , final int y )
-	{
-		addGrid( slotAdder , columns , rows , index , x , y , 2 , 2 );
-	}
-
-
-	public static void addGrid( final UContainers.SlotAdder slotAdder , final int columns , final int rows ,
-			final int index , final int x , final int y , int xSpacing , int ySpacing )
-	{
-		for ( int row = 0 , i = 0 ; row < rows ; ++row ) {
-			for ( int column = 0 ; column < columns ; ++column , ++i ) {
-				slotAdder.addSlot( index + i , x + column * ( 16 + xSpacing ) , y + row * ( 16 + ySpacing ) );
-			}
-		}
-	}
-
-}

src/java/mmm/utils/gui/A_UGContainerScreen.java

@@ -0,0 +1,54 @@
+package mmm.utils.gui;
+
+
+import net.minecraft.client.gui.FontRenderer;
+import net.minecraft.client.gui.inventory.GuiContainer;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+
+
+
+@SideOnly( Side.CLIENT )
+public abstract class A_UGContainerScreen< CTYPE extends UGContainer >
+		extends GuiContainer
+{
+	public final CTYPE container;
+
+
+	public A_UGContainerScreen( final CTYPE inventorySlotsIn )
+	{
+		super( inventorySlotsIn );
+		this.container = inventorySlotsIn;
+	}
+
+
+	public int getLeft( )
+	{
+		return this.guiLeft;
+	}
+
+
+	public int getTop( )
+	{
+		return this.guiTop;
+	}
+
+
+	public int getXSize( )
+	{
+		return this.xSize;
+	}
+
+
+	public int getYSize( )
+	{
+		return this.ySize;
+	}
+
+
+	public FontRenderer getFontRenderer( )
+	{
+		return this.fontRendererObj;
+	}
+
+}

src/java/mmm/utils/gui/A_UGTab.java

@@ -0,0 +1,155 @@
+package mmm.utils.gui;
+
+
+import java.util.List;
+
+import com.google.common.collect.Lists;
+
+import net.minecraft.client.gui.Gui;
+import net.minecraft.client.gui.GuiButton;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+
+
+
+@SideOnly( Side.CLIENT )
+public abstract class A_UGTab
+		extends Gui
+{
+	protected A_UGTabbedContainerScreen< ? > parent;
+	protected int ordinal;
+	protected int[] slotGroups;
+	protected ResourceLocation background;
+	protected int height;
+	protected int iconX;
+	protected int iconY;
+	protected String tooltip;
+	protected List< GuiButton > buttons = Lists.< GuiButton > newArrayList( );
+
+
+	A_UGTab setParent( final A_UGTabbedContainerScreen< ? > parent , int ordinal )
+	{
+		this.parent = parent;
+		this.ordinal = ordinal;
+		return this;
+	}
+
+
+	public ResourceLocation getBackground( )
+	{
+		return this.background;
+	}
+
+
+	public A_UGTab setBackground( ResourceLocation background )
+	{
+		this.background = background;
+		return this;
+	}
+
+
+	public int getHeight( )
+	{
+		return this.height;
+	}
+
+
+	public A_UGTab setHeight( int height )
+	{
+		this.height = height;
+		return this;
+	}
+
+
+	public int getIconX( )
+	{
+		return this.iconX;
+	}
+
+
+	public int getIconY( )
+	{
+		return this.iconY;
+	}
+
+
+	public A_UGTab setIconPosition( int x , int y )
+	{
+		this.iconX = x;
+		this.iconY = y;
+		return this;
+	}
+
+
+	public String getTooltip( )
+	{
+		return this.tooltip;
+	}
+
+
+	public A_UGTab setTooltip( String tooltip )
+	{
+		this.tooltip = tooltip;
+		return this;
+	}
+
+
+	public A_UGTab setSlotGroups( int... slotGroups )
+	{
+		this.slotGroups = slotGroups;
+		return this;
+	}
+
+
+	public void initGui( int x , int y )
+	{
+		// EMPTY
+	}
+
+
+	public void drawBackground( float partialTicks , int mouseX , int mouseY )
+	{
+		GlStateManager.color( 1f , 1f , 1f , 1f );
+		GlStateManager.enableBlend( );
+		GlStateManager.disableLighting( );
+		this.parent.mc.getTextureManager( ).bindTexture( this.background );
+		this.drawTexturedModalRect( this.parent.getLeft( ) , this.parent.getTop( ) , 0 , 0 , this.parent.getXSize( ) ,
+				this.height );
+	}
+
+
+	public void onSelected( )
+	{
+		for ( int i = 0 ; i < this.buttons.size( ) ; i++ ) {
+			this.buttons.get( i ).visible = true;
+		}
+	}
+
+
+	public void onDeselected( )
+	{
+		for ( int i = 0 ; i < this.buttons.size( ) ; i++ ) {
+			this.buttons.get( i ).visible = false;
+		}
+	}
+
+
+	public void onMouseClicked( int mouseX , int mouseY , int mouseButton )
+	{
+		// EMPTY
+	}
+
+
+	public boolean onKeyTyped( final char typedChar , final int keyCode )
+	{
+		return false;
+	}
+
+
+	public boolean onActionPerformed( GuiButton button )
+	{
+		return false;
+	}
+}

src/java/mmm/utils/gui/A_UGTabbedContainerScreen.java

@@ -0,0 +1,217 @@
+package mmm.utils.gui;
+
+
+import java.io.IOException;
+import java.util.List;
+
+import com.google.common.collect.Lists;
+
+import net.minecraft.client.gui.GuiButton;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.resources.I18n;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.text.TextFormatting;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+
+
+
+@SideOnly( Side.CLIENT )
+public abstract class A_UGTabbedContainerScreen< CTYPE extends UGContainer >
+		extends A_UGContainerScreen< CTYPE >
+{
+	protected final ResourceLocation mainTexture;
+	protected final A_UGTab[] tabs;
+	protected int currentTab;
+
+
+	public A_UGTabbedContainerScreen( final CTYPE inventorySlotsIn , final ResourceLocation mainTexture ,
+			final A_UGTab... tabs )
+	{
+		super( inventorySlotsIn );
+
+		int height = 0;
+		for ( int i = 0 ; i < tabs.length ; i++ ) {
+			tabs[ i ].setParent( this , i );
+			if ( tabs[ i ].getHeight( ) > height ) {
+				height = tabs[ i ].getHeight( );
+			}
+		}
+
+		this.tabs = tabs;
+		this.mainTexture = mainTexture;
+		this.ySize = height;
+		this.currentTab = -1;
+		this.selectTab( 0 );
+	}
+
+
+	@Override
+	public void initGui( )
+	{
+		super.initGui( );
+
+		final int x = ( this.width - this.xSize ) / 2;
+		final int y = ( this.height - this.ySize ) / 2;
+
+		for ( final A_UGTab tab : this.tabs ) {
+			tab.buttons.clear( );
+			tab.initGui( x , y );
+			this.buttonList.addAll( tab.buttons );
+		}
+	}
+
+
+	@Override
+	public void drawScreen( final int mouseX , final int mouseY , final float partialTicks )
+	{
+		super.drawScreen( mouseX , mouseY , partialTicks );
+
+		for ( int tabIndex = 0 ; tabIndex < this.tabs.length ; tabIndex++ ) {
+			if ( this.isInTab( tabIndex , mouseX , mouseY ) ) {
+				final List< String > list = Lists.< String > newArrayList( );
+				list.add( TextFormatting.WHITE + I18n.format( this.tabs[ tabIndex ].tooltip ) );
+				this.drawHoveringText( list , mouseX , mouseY );
+				break;
+			}
+		}
+	}
+
+
+	@Override
+	protected void drawGuiContainerBackgroundLayer( final float partialTicks , final int mouseX , final int mouseY )
+	{
+		// Inactive tabs
+		GlStateManager.color( 1f , 1f , 1f , 1f );
+		GlStateManager.enableBlend( );
+		GlStateManager.disableLighting( );
+		this.mc.getTextureManager( ).bindTexture( GUIUtils.GUI_TEXTURE );
+		for ( int tabIndex = 0 ; tabIndex < this.tabs.length ; tabIndex++ ) {
+			if ( tabIndex != this.currentTab ) {
+				this.drawTabBackground( tabIndex );
+			}
+		}
+
+		// Tab panel
+		this.tabs[ this.currentTab ].drawBackground( partialTicks , mouseX , mouseY );
+		GlStateManager.color( 1f , 1f , 1f , 1f );
+		GlStateManager.enableBlend( );
+		GlStateManager.disableLighting( );
+
+		// Active tab
+		this.mc.getTextureManager( ).bindTexture( GUIUtils.GUI_TEXTURE );
+		this.drawTabBackground( this.currentTab );
+
+		// Tab icons
+		this.mc.getTextureManager( ).bindTexture( this.mainTexture );
+		this.zLevel = 100f;
+		for ( int tabIndex = 0 ; tabIndex < this.tabs.length ; tabIndex++ ) {
+			this.drawTabIcon( tabIndex );
+		}
+	}
+
+
+	@Override
+	protected void mouseClicked( final int mouseX , final int mouseY , final int mouseButton )
+			throws IOException
+	{
+		super.mouseClicked( mouseX , mouseY , mouseButton );
+
+		for ( int i = 0 ; i < this.tabs.length ; i++ ) {
+			if ( this.currentTab != i && this.isInTab( i , mouseX , mouseY ) ) {
+				this.selectTab( i );
+				return;
+			}
+		}
+
+		this.tabs[ this.currentTab ].onMouseClicked( mouseX , mouseY , mouseButton );
+	}
+
+
+	@Override
+	protected void keyTyped( final char typedChar , final int keyCode )
+			throws IOException
+	{
+		if ( !this.tabs[ this.currentTab ].onKeyTyped( typedChar , keyCode ) ) {
+			super.keyTyped( typedChar , keyCode );
+		}
+	}
+
+
+	@Override
+	protected void actionPerformed( final GuiButton button )
+			throws IOException
+	{
+		if ( !this.tabs[ this.currentTab ].onActionPerformed( button ) ) {
+			this.onContainerActionPerformed( button );
+		}
+	}
+
+
+	protected void onContainerActionPerformed( final GuiButton button )
+	{
+		// EMPTY
+	}
+
+
+	protected boolean isInTab( final int tab , final int mouseX , final int mouseY )
+	{
+		final int tabOffsetX = tab * GUIUtils.TAB_WIDTH;
+		final int tabX = this.guiLeft + tabOffsetX + GUIUtils.TAB_BORDER;
+		final int tabY = this.guiTop - GUIUtils.TAB_HEIGHT + GUIUtils.TAB_BORDER;
+		return mouseX >= tabX && mouseY >= tabY && mouseX <= tabX + GUIUtils.TAB_WIDTH
+				&& mouseY <= tabY + GUIUtils.TAB_HEIGHT;
+	}
+
+
+	protected void drawTabBackground( final int tab )
+	{
+		final boolean selected = this.currentTab == tab;
+		final int tabOffsetX = tab * GUIUtils.TAB_WIDTH;
+		final int tabX = this.guiLeft + tabOffsetX + GUIUtils.TAB_BORDER;
+		final int tabY = this.guiTop - GUIUtils.TAB_HEIGHT + GUIUtils.TAB_BORDER;
+		this.drawTexturedModalRect( tabX , tabY , //
+				GUIUtils.TAB_TEXTURE_X , GUIUtils.TAB_TEXTURE_Y + ( selected ? GUIUtils.TAB_HEIGHT : 0 ) , //
+				GUIUtils.TAB_WIDTH , GUIUtils.TAB_HEIGHT );
+	}
+
+
+	protected void drawTabIcon( final int tab )
+	{
+		final int tabOffsetX = tab * GUIUtils.TAB_WIDTH;
+		final int tabX = this.guiLeft + tabOffsetX + GUIUtils.TAB_BORDER;
+		final int tabY = this.guiTop - GUIUtils.TAB_HEIGHT + GUIUtils.TAB_BORDER;
+		this.drawTexturedModalRect( tabX + GUIUtils.TAB_ICON_X , tabY + GUIUtils.TAB_ICON_Y , //
+				this.tabs[ tab ].getIconX( ) , this.tabs[ tab ].getIconY( ) , //
+				GUIUtils.TAB_ICON_WIDTH , GUIUtils.TAB_ICON_HEIGHT );
+	}
+
+
+	protected void selectTab( final int tabIndex )
+	{
+		if ( this.currentTab >= 0 ) {
+			this.hideCurrentTab( );
+		}
+
+		this.currentTab = tabIndex;
+		final A_UGTab tab = this.tabs[ tabIndex ];
+		if ( tab.slotGroups != null ) {
+			for ( final int sg : tab.slotGroups ) {
+				this.container.slotGroups.showGroup( sg );
+			}
+		}
+		tab.onSelected( );
+	}
+
+
+	private void hideCurrentTab( )
+	{
+		final A_UGTab tab = this.tabs[ this.currentTab ];
+		if ( tab.slotGroups != null ) {
+			for ( final int sg : tab.slotGroups ) {
+				this.container.slotGroups.hideGroup( sg );
+			}
+		}
+		tab.onDeselected( );
+	}
+}

src/java/mmm/utils/gui/GUIUtils.java

@@ -0,0 +1,33 @@
+package mmm.utils.gui;
+
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import net.minecraft.util.ResourceLocation;
+
+
+
+public class GUIUtils
+{
+	static final Logger LOGGER = LogManager.getLogger( );
+
+	public static final ResourceLocation GUI_TEXTURE = new ResourceLocation( "mmm" , "textures/gui/gui-common.png" );
+
+	public static final int TAB_TEXTURE_X = 0;
+	public static final int TAB_TEXTURE_Y = 0;
+	public static final int TAB_WIDTH = 26;
+	public static final int TAB_HEIGHT = 26;
+
+	public static final int ABT_TEXTURE_X = 26;
+	public static final int ABT_TEXTURE_Y = 0;
+	public static final int ABT_WIDTH = 10;
+	public static final int ABT_HEIGHT = 15;
+
+	public static final int TAB_BORDER = 4;
+	public static final int TAB_ICON_X = 5;
+	public static final int TAB_ICON_Y = 5;
+	public static final int TAB_ICON_WIDTH = 16;
+	public static final int TAB_ICON_HEIGHT = 16;
+
+}

src/java/mmm/utils/gui/UGArrowButton.java

@@ -0,0 +1,51 @@
+package mmm.utils.gui;
+
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.GuiButton;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+
+
+
+@SideOnly( Side.CLIENT )
+public class UGArrowButton
+		extends GuiButton
+{
+	public final boolean forward;
+
+
+	public UGArrowButton( final int buttonID , final int x , final int y , final boolean forward )
+	{
+		super( buttonID , x , y , GUIUtils.ABT_WIDTH , GUIUtils.ABT_HEIGHT , "" );
+		this.forward = forward;
+	}
+
+
+	@Override
+	public void drawButton( final Minecraft mc , final int mouseX , final int mouseY )
+	{
+		if ( !this.visible ) {
+			return;
+		}
+		mc.getTextureManager( ).bindTexture( GUIUtils.GUI_TEXTURE );
+		GlStateManager.color( 1f , 1f , 1f , 1f );
+
+		int texX = GUIUtils.ABT_TEXTURE_X;
+		if ( !this.enabled ) {
+			texX += this.width * 2;
+		} else if ( mouseX >= this.xPosition && mouseY >= this.yPosition && mouseX < this.xPosition + this.width
+				&& mouseY < this.yPosition + this.height ) {
+			texX += this.width;
+		}
+
+		int texY = GUIUtils.ABT_TEXTURE_Y;
+		if ( !this.forward ) {
+			texY += this.height;
+		}
+
+		this.drawTexturedModalRect( this.xPosition , this.yPosition , texX , texY , this.width , this.height );
+	}
+
+}

src/java/mmm/utils/gui/UGContainer.java

@@ -0,0 +1,62 @@
+package mmm.utils.gui;
+
+
+import net.minecraft.inventory.Container;
+import net.minecraft.inventory.IInventory;
+import net.minecraft.inventory.Slot;
+
+
+
+public abstract class UGContainer
+		extends Container
+{
+
+	public static interface I_SlotFactory
+	{
+		public Slot createSlot( IInventory inv , int index , int x , int y );
+	}
+
+	public final UGSlotGroups slotGroups;
+
+
+	public UGContainer( )
+	{
+		super( );
+		this.slotGroups = new UGSlotGroups( this.inventorySlots );
+		this.slotGroups.nextGroup( );
+	}
+
+
+	public void addPlayerInventory( final I_SlotFactory slotAdder , final IInventory inv , final int x , final int y )
+	{
+		this.addPlayerInventory( slotAdder , inv , x , y , 4 );
+	}
+
+
+	public void addPlayerInventory( final I_SlotFactory slotAdder , final IInventory inv , final int x , final int y ,
+			final int spacing )
+	{
+		this.addGrid( slotAdder , inv , 9 , 3 , 9 , x , y ); // Main inventory
+		this.addGrid( slotAdder , inv , 9 , 1 , 0 , x , y + spacing + 54 ); // Quick bar
+	}
+
+
+	public void addGrid( final I_SlotFactory slotAdder , final IInventory inv , final int columns , final int rows ,
+			final int index , final int x , final int y )
+	{
+		this.addGrid( slotAdder , inv , columns , rows , index , x , y , 2 , 2 );
+	}
+
+
+	public void addGrid( final I_SlotFactory slotAdder , final IInventory inv , final int columns , final int rows ,
+			final int index , final int x , final int y , final int xSpacing , final int ySpacing )
+	{
+		for ( int row = 0 , i = 0 ; row < rows ; ++row ) {
+			for ( int column = 0 ; column < columns ; ++column , ++i ) {
+				this.addSlotToContainer( slotAdder.createSlot( inv , index + i , //
+						x + column * ( 16 + xSpacing ) , y + row * ( 16 + ySpacing ) ) );
+			}
+		}
+	}
+
+}

src/java/mmm/utils/gui/UGSlotDisplay.java

@@ -1,4 +1,4 @@
-package mmm.utils.slots;
+package mmm.utils.gui;
 
 
 import net.minecraft.entity.player.EntityPlayer;
@@ -9,25 +9,25 @@ import net.minecraft.item.ItemStack;
 
 
 /** An inventory slot that cannot be interacted with */
-public class USDisplay
+public class UGSlotDisplay
 		extends Slot
 {
 
-	public USDisplay( IInventory inventoryIn , int index , int xPosition , int yPosition )
+	public UGSlotDisplay( final IInventory inventoryIn , final int index , final int xPosition , final int yPosition )
 	{
 		super( inventoryIn , index , xPosition , yPosition );
 	}
 
 
 	@Override
-	public boolean isItemValid( ItemStack stack )
+	public boolean isItemValid( final ItemStack stack )
 	{
 		return false;
 	}
 
 
 	@Override
-	public boolean canTakeStack( EntityPlayer playerIn )
+	public boolean canTakeStack( final EntityPlayer playerIn )
 	{
 		return false;
 	}

src/java/mmm/utils/gui/UGSlotFuel.java

@@ -1,4 +1,4 @@
-package mmm.utils.slots;
+package mmm.utils.gui;
 
 
 import javax.annotation.Nullable;
@@ -10,11 +10,11 @@ import net.minecraft.tileentity.TileEntityFurnace;
 
 
 
-public class USFuel
+public class UGSlotFuel
 		extends Slot
 {
 
-	public USFuel( final IInventory inventoryIn , final int slotIndex , final int xPosition , final int yPosition )
+	public UGSlotFuel( final IInventory inventoryIn , final int slotIndex , final int xPosition , final int yPosition )
 	{
 		super( inventoryIn , slotIndex , xPosition , yPosition );
 	}

src/java/mmm/utils/gui/UGSlotGroups.java

@@ -1,4 +1,4 @@
-package mmm.utils.slots;
+package mmm.utils.gui;
 
 
 import java.util.List;
@@ -8,7 +8,7 @@ import net.minecraft.inventory.Slot;
 
 
 
-public class USVisibilityController
+public class UGSlotGroups
 {
 	private final List< Slot > slots;
 	private final IntArrayList firstSlots;
@@ -16,21 +16,21 @@ public class USVisibilityController
 	private int[] slotY;
 
 
-	public USVisibilityController( final List< Slot > slots )
+	public UGSlotGroups( final List< Slot > slots )
 	{
 		this.slots = slots;
 		this.firstSlots = new IntArrayList( );
 	}
 
 
-	public int startGroup( )
+	public int nextGroup( )
 	{
 		this.firstSlots.add( this.slots.size( ) );
 		return this.firstSlots.size( ) - 1;
 	}
 
 
-	public void finalizeGroups( )
+	public void endGroups( )
 	{
 		final int nSlots = this.slots.size( );
 		this.slotX = new int[ nSlots ];
@@ -39,11 +39,12 @@ public class USVisibilityController
 			final Slot slot = this.slots.get( i );
 			this.slotX[ i ] = slot.xDisplayPosition;
 			this.slotY[ i ] = slot.yDisplayPosition;
+			slot.xDisplayPosition = slot.yDisplayPosition = -4000;
 		}
 	}
 
 
-	public USVisibilityController showGroup( final int index )
+	public UGSlotGroups showGroup( final int index )
 	{
 		final int first = this.firstSlots.getInt( index );
 		final int last;
@@ -63,7 +64,7 @@ public class USVisibilityController
 	}
 
 
-	public USVisibilityController hideGroup( final int index )
+	public UGSlotGroups hideGroup( final int index )
 	{
 		final int first = this.firstSlots.getInt( index );
 		final int last;

src/java/mmm/utils/gui/UGSlotOutput.java

@@ -1,4 +1,4 @@
-package mmm.utils.slots;
+package mmm.utils.gui;
 
 
 import javax.annotation.Nullable;
@@ -10,7 +10,7 @@ import net.minecraft.item.ItemStack;
 
 
 
-public class USOutput
+public class UGSlotOutput
 		extends Slot
 {
 	public static interface I_OutputHandler
@@ -27,14 +27,14 @@ public class USOutput
 	private int removed;
 
 
-	public USOutput( final EntityPlayer player , final IInventory inventoryIn , final int slotIndex ,
+	public UGSlotOutput( final EntityPlayer player , final IInventory inventoryIn , final int slotIndex ,
 			final int xPosition , final int yPosition )
 	{
 		this( player , inventoryIn , slotIndex , xPosition , yPosition , null );
 	}
 
 
-	public USOutput( final EntityPlayer player , final IInventory inventoryIn , final int slotIndex ,
+	public UGSlotOutput( final EntityPlayer player , final IInventory inventoryIn , final int slotIndex ,
 			final int xPosition , final int yPosition , @Nullable final I_OutputHandler handler )
 	{
 		super( inventoryIn , slotIndex , xPosition , yPosition );