proceeding the backpack

src/main/java/de/jottyfan/minecraft/quickiefabric/container/BackpackInventory.java

@@ -5,16 +5,50 @@ import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.inventory.Inventories;
 import net.minecraft.inventory.Inventory;
 import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.sound.SoundCategory;
+import net.minecraft.sound.SoundEvents;
 import net.minecraft.util.collection.DefaultedList;
 
 public class BackpackInventory implements Inventory {
 	public static final int SECTION_SIZE = 9;
 	private final DefaultedList<ItemStack> stacks;
-	private BackpackScreenHandler container;
+	private final BackpackScreenHandler handler;
 	
-	public BackpackInventory(BackpackScreenHandler container) {
+	public BackpackInventory(CompoundTag tag, BackpackScreenHandler handler) {
+		this.handler = handler;
 		this.stacks = DefaultedList.ofSize(SECTION_SIZE * ItemBackpack.SLOTSIZE, ItemStack.EMPTY);
-		this.container = container;
+		readItemsFromTag(this.stacks, tag);
+	}
+
+	private void readItemsFromTag(DefaultedList<ItemStack> inventory, CompoundTag tag) {
+		ListTag listTag = tag.getList("items", 10);
+		for (int i = 0; i < listTag.size(); ++i) {
+			CompoundTag compoundTag = listTag.getCompound(i);
+			int j = compoundTag.getInt("slot");
+
+			if (j >= 0 && j < inventory.size()) {
+				inventory.set(j, ItemStack.fromTag(compoundTag));
+			}
+		}
+	}
+
+	private CompoundTag writeItemsToTag() {
+		DefaultedList<ItemStack> inventory = stacks;
+		ListTag listTag = new ListTag();
+		for (int i = 0; i < inventory.size(); ++i) {
+			ItemStack itemStack = (ItemStack) inventory.get(i);
+			if (!itemStack.isEmpty()) {
+				CompoundTag compoundTag = new CompoundTag();
+				compoundTag.putInt("slot", i);
+				itemStack.toTag(compoundTag);
+				listTag.add(compoundTag);
+			}
+		}
+		CompoundTag tag = new CompoundTag();
+		tag.put("items", listTag);
+		return tag;
 	}
 
 	public DefaultedList<ItemStack> getList(DefaultedList<ItemStack> dl) {
@@ -75,6 +109,25 @@ public class BackpackInventory implements Inventory {
 
 	@Override
 	public void markDirty() {
-		this.container.onContentChanged(this);
+		handler.onContentChanged(this);
+	}
+
+	@Override
+	public void onOpen(PlayerEntity player) {
+		Inventory.super.onOpen(player);
+		player.playSound(SoundEvents.BLOCK_WOOL_PLACE, SoundCategory.PLAYERS, 1f, 1f);
+	}
+
+	@Override
+	public void onClose(PlayerEntity player) {
+		Inventory.super.onClose(player);
+		ItemStack stack = player.getMainHandStack();
+		if (stack != null) {
+			if (!stack.hasTag()) {
+				stack.setTag(new CompoundTag());
+			}
+			stack.getTag().put("backpack", writeItemsToTag());
+		}
+		player.playSound(SoundEvents.BLOCK_WOOL_PLACE, SoundCategory.PLAYERS, 1f, 1f);
 	}
 }

src/main/java/de/jottyfan/minecraft/quickiefabric/container/BackpackScreen.java

@@ -63,4 +63,11 @@ public class BackpackScreen extends HandledScreen<BackpackScreenHandler> impleme
 
 		drawSlots(matrices, guiX, guiY);
 	}
+
+	@Override
+  protected void drawForeground(MatrixStack matrixStack, int i, int j)
+  {
+     this.textRenderer.draw(matrixStack, this.title, 8.0F, -20.0F, 4210752);
+     this.textRenderer.draw(matrixStack, this.playerInventory.getDisplayName(), 8.0F, 101f, 4210752);
+  }
 }

src/main/java/de/jottyfan/minecraft/quickiefabric/container/BackpackScreenHandler.java

@@ -8,7 +8,6 @@ import net.minecraft.inventory.Inventory;
 import net.minecraft.item.ItemStack;
 import net.minecraft.screen.ScreenHandler;
 import net.minecraft.screen.slot.Slot;
-import net.minecraft.screen.slot.SlotActionType;
 import net.minecraft.util.Hand;
 import net.minecraft.util.collection.DefaultedList;
 
@@ -22,25 +21,16 @@ public class BackpackScreenHandler extends ScreenHandler {
 	public BackpackScreenHandler(int syncId, PlayerInventory playerInventory) {
 		super(RegistryManager.BACKPACK_SCREEN_HANDLER, syncId);
 		this.player = playerInventory.player;
-		this.backpackInventory = new BackpackInventory(this);
+		this.backpackInventory = ItemBackpack.getInventory(this, hand, player);
 		backpackSlots = ItemBackpack.SLOTSIZE;
 
-		int spacing;
+		int spacing = 112;
-		if (backpackSlots % 9 == 0) {
+
-			spacing = 30 + (backpackSlots / 9) * 18 + ((backpackSlots / 9) < 5 ? 0 : 2);
+		for (int y = 0; y < 6; y++) {
-		} else {
-			spacing = 30 + (backpackSlots / 9 + 1) * 18 + ((backpackSlots / 9) < 5 ? 0 : 2);
-		}
-		for (int y = 0; y < (backpackSlots / 9); y++) {
 			for (int x = 0; x < 9; ++x) {
-				this.addSlot(new Slot(backpackInventory, x + y * 9, 8 + x * 18, 18 + y * 18));
+				this.addSlot(new Slot(backpackInventory, x + y * 9, 8 + x * 18, -10 + y * 18));
 			}
 		}
-		if ((backpackSlots % 9) != 0) {
-			for (int x = 0; x < (backpackSlots % 9); x++) {
-				this.addSlot(
-						new Slot(backpackInventory, x + (backpackSlots / 9) * 9, 8 + x * 18, 18 + (backpackSlots / 9) * 18));
-			}
 		for (int y = 0; y < 3; ++y) {
 			for (int x = 0; x < 9; ++x) {
 				this.addSlot(new Slot(playerInventory, x + y * 9 + 9, 8 + x * 18, spacing + y * 18));
@@ -50,6 +40,9 @@ public class BackpackScreenHandler extends ScreenHandler {
 			this.addSlot(new Slot(playerInventory, x, 8 + x * 18, 58 + spacing));
 		}
 	}
+	
+	public PlayerEntity getPlayer() {
+		return this.player;
 	}
 
 	@Override
@@ -57,6 +50,7 @@ public class BackpackScreenHandler extends ScreenHandler {
 		return true;
 	}
 
+	@Override
 	public void onContentChanged(Inventory inv) {
 		super.onContentChanged(inv);
 		if (inv == this.backpackInventory) {
@@ -64,6 +58,7 @@ public class BackpackScreenHandler extends ScreenHandler {
 		}
 	}
 
+	@Override
 	public void close(PlayerEntity player) {
 		super.close(player);
 		this.backpackInventory.onClose(player);
@@ -87,31 +82,19 @@ public class BackpackScreenHandler extends ScreenHandler {
 			} else if (!this.insertItem(clickedStack, 0, backpackSlots, false)) {
 				return ItemStack.EMPTY;
 			}
-
 			if (clickedStack.isEmpty()) {
 				clickedSlot.setStack(ItemStack.EMPTY);
 			} else {
 				clickedSlot.markDirty();
 			}
 		}
-
 		return copy;
 	}
 
-	@Override
-	public ItemStack onSlotClick(int i, int j, SlotActionType slotActionType, PlayerEntity playerEntity) {
-		if (i > 0) {
-			if (this.getSlot(i).getStack().equals(playerEntity.getStackInHand(hand))) {
-				return ItemStack.EMPTY;
-			}
-		}
-		return super.onSlotClick(i, j, slotActionType, playerEntity);
-	}
-
 	public BackpackScreenHandler withHand(Hand hand) {
 		this.hand = hand;
 		DefaultedList<ItemStack> ad = DefaultedList.ofSize(backpackSlots, ItemStack.EMPTY);
-		ItemBackpack.getInventory(player.getStackInHand(this.hand), ad);
+//		ItemBackpack.getInventory(player.getStackInHand(this.hand), ad);
 		if (ad.size() == 0) {
 			return this;
 		}
@@ -125,4 +108,8 @@ public class BackpackScreenHandler extends ScreenHandler {
 		}
 		return this;
 	}
+
+	public Hand getHand() {
+		return hand;
+	}
 }

src/main/java/de/jottyfan/minecraft/quickiefabric/init/RegistryManager.java

@@ -48,8 +48,8 @@ public class RegistryManager {
 
 	public static final String QUICKIEFABRIC = "quickiefabric";
 	
-	public static final Identifier BACKPACK_CONTAINTER = new Identifier(QUICKIEFABRIC, "backpack");
+	public static final Identifier BACKPACK_IDENTIFIER = new Identifier(QUICKIEFABRIC, "backpack");
-	public static final ScreenHandlerType<BackpackScreenHandler> BACKPACK_SCREEN_HANDLER = ScreenHandlerRegistry.registerSimple(RegistryManager.BACKPACK_CONTAINTER, BackpackScreenHandler::new);
+	public static final ScreenHandlerType<BackpackScreenHandler> BACKPACK_SCREEN_HANDLER = ScreenHandlerRegistry.registerSimple(RegistryManager.BACKPACK_IDENTIFIER, BackpackScreenHandler::new);
 
 	public static final ItemGroup QUICKIEFABRIC_GROUP = FabricItemGroupBuilder.create(new Identifier(QUICKIEFABRIC, "all")).icon(() -> new ItemStack(QuickieItems.SPEEDPOWDER))
 			.appendItems(stacks -> {

src/main/java/de/jottyfan/minecraft/quickiefabric/items/ItemBackpack.java

@@ -3,10 +3,10 @@ package de.jottyfan.minecraft.quickiefabric.items;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+import de.jottyfan.minecraft.quickiefabric.container.BackpackInventory;
 import de.jottyfan.minecraft.quickiefabric.container.BackpackScreenHandler;
 import de.jottyfan.minecraft.quickiefabric.init.RegistryManager;
 import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.inventory.Inventories;
 import net.minecraft.item.DyeableItem;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
@@ -15,10 +15,7 @@ import net.minecraft.screen.SimpleNamedScreenHandlerFactory;
 import net.minecraft.text.Text;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.Hand;
-import net.minecraft.util.Identifier;
 import net.minecraft.util.TypedActionResult;
-import net.minecraft.util.collection.DefaultedList;
-import net.minecraft.util.registry.Registry;
 import net.minecraft.world.World;
 
 /**
@@ -27,7 +24,7 @@ import net.minecraft.world.World;
  *
  */
 public class ItemBackpack extends Item implements DyeableItem {
-	private static final Logger LOGGER = LogManager.getLogger(ItemBackpack.class);
+	private final static Logger LOGGER = LogManager.getLogger(ItemBackpack.class);
 	public final static Integer SLOTSIZE = 54;
 
 	public ItemBackpack() {
@@ -37,31 +34,43 @@ public class ItemBackpack extends Item implements DyeableItem {
 	@Override
 	public TypedActionResult<ItemStack> use(World world, PlayerEntity player, Hand hand) {
 		if (!world.isClient) {
-			for (Identifier id : Registry.SCREEN_HANDLER.getIds()) {
-				LOGGER.info("found registered screen {}", id.toString());
-			}
 			SimpleNamedScreenHandlerFactory factory = new SimpleNamedScreenHandlerFactory(
 					(id, inventory, buf) -> new BackpackScreenHandler(id, player.inventory).withHand(hand),
-					Text.method_30163(RegistryManager.BACKPACK_CONTAINTER.toString()));
+					Text.method_30163(RegistryManager.BACKPACK_IDENTIFIER.toString()));
 			player.openHandledScreen(factory);
 		}
 		return new TypedActionResult<ItemStack>(ActionResult.PASS, player.getStackInHand(hand));
 	}
 
-	public static void setInventory(ItemStack backpack, DefaultedList<ItemStack> list) {
+	public static BackpackInventory getInventory(BackpackScreenHandler handler, Hand hand, PlayerEntity player) {
-		CompoundTag nbt = backpack.getOrCreateTag();
+		ItemStack stack = player.getMainHandStack();
-		Inventories.toTag(nbt, list);
+		if (stack != null) {
-		backpack.setTag(nbt);
+			if (!stack.hasTag()) {
+				stack.setTag(new CompoundTag());
+			}
+			if (!stack.getTag().contains("backpack")) {
+				stack.getTag().put("backpack", new CompoundTag());
+			}
+		} else {
+			LOGGER.warn("player.getMainHandStack() is null");
+		}
+		return new BackpackInventory(stack.getTag().getCompound("backpack"), handler);
 	}
 
-	public static void getInventory(ItemStack backpack, DefaultedList<ItemStack> defaultedList) {
+//	public static void setInventory(ItemStack backpack, DefaultedList<ItemStack> list) {
-		CompoundTag nbt;
+//		CompoundTag nbt = backpack.getOrCreateTag();
-		if (backpack.hasTag()) {
+//		Inventories.toTag(nbt, list);
-			nbt = backpack.getTag();
+//		backpack.setTag(nbt);
-		} else {
+//	}
-			nbt = new CompoundTag();
+//
-		}
+//	public static void getInventory(ItemStack backpack, DefaultedList<ItemStack> defaultedList) {
-		Inventories.fromTag(nbt, defaultedList);
+//		CompoundTag nbt;
-		backpack.setTag(nbt);
+//		if (backpack.hasTag()) {
-	}
+//			nbt = backpack.getTag();
+//		} else {
+//			nbt = new CompoundTag();
+//		}
+//		Inventories.fromTag(nbt, defaultedList);
+//		backpack.setTag(nbt);
+//	}
 }