[SOLVED][1.12.2] ItemStackHandler syncing issue

Hello,

I have a TE and I want to show the content of ItemStack Handler on client screen using RenderGameOverlay.Post event. My code is working good, but, when i'm trying to get ItemStackHandler capability, he is empty. All of these slots are empty, even though I put items inside. I think it's a syncing problem between Server and Client. 

HUDHandler class :

package com.zeide.skillsstones.handler;

import com.zeide.skillsstones.blocks.tileentities.TileEntityNaturalPedestal;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.ScaledResolution;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.RenderHelper;
import net.minecraft.item.ItemStack;
import net.minecraft.profiler.Profiler;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.math.RayTraceResult;
import net.minecraftforge.client.event.RenderGameOverlayEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.IItemHandler;
import org.lwjgl.opengl.GL11;

import java.util.ArrayList;
import java.util.List;

@Mod.EventBusSubscriber
public class HUDHandler {

    private static void renderItemsInPedestal(ScaledResolution res, TileEntityNaturalPedestal tile) {

        Minecraft mc = Minecraft.getMinecraft();
        Profiler profiler = mc.mcProfiler;

        profiler.startSection("itemsInPedestal");
        int x = res.getScaledWidth() / 2 - 11;
        int y = res.getScaledHeight() / 2 + 10;

        GlStateManager.enableBlend();
        GlStateManager.blendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

        GlStateManager.color(1F, 1F, 1F, 1F);

        IItemHandler itemHandler = tile.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null);

        List<ItemStack> items = new ArrayList<>();

        for(int i=0; i < itemHandler.getSlots(); i++){

            if(itemHandler.getStackInSlot(i).isEmpty()) {

                items.add(itemHandler.getStackInSlot(i));

            }

        }

        int r = x + ((items.size() * 10) - 10);

        RenderHelper.enableGUIStandardItemLighting();

        for(ItemStack is : items) {

            mc.getRenderItem().renderItemAndEffectIntoGUI(is, r, y);
            System.out.println("Itemstack " + is.getDisplayName());
            r -= 20;

        }

        RenderHelper.disableStandardItemLighting();

        GlStateManager.disableLighting();
        GlStateManager.disableBlend();

        profiler.endSection();

    }

    @SubscribeEvent
    public static void onDrawScreenPost(RenderGameOverlayEvent.Post event) {

        if(event.getType() == RenderGameOverlayEvent.ElementType.ALL) {

            if(Minecraft.getMinecraft().objectMouseOver != null) {

                RayTraceResult pos = Minecraft.getMinecraft().objectMouseOver;

                TileEntity tile = pos.typeOfHit == RayTraceResult.Type.BLOCK ? Minecraft.getMinecraft().world.getTileEntity(pos.getBlockPos()) : null;

                if(tile instanceof TileEntityNaturalPedestal) {

                    renderItemsInPedestal(event.getResolution(), (TileEntityNaturalPedestal) tile);

                }

            }

        }

    }

}

Tile Entity class :

package com.zeide.skillsstones.blocks.tileentities;

import net.minecraft.entity.item.EntityItem;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.network.NetworkManager;
import net.minecraft.network.play.server.SPacketUpdateTileEntity;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.ICapabilityProvider;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.ItemStackHandler;

import javax.annotation.Nullable;

public class TileEntityNaturalPedestal extends TileEntity implements ICapabilityProvider {

    private ItemStackHandler inventory = new ItemStackHandler(8) {

        @Override
        protected void onContentsChanged(int slot) {

            markDirty();

        }

    };

    @Override
    public void readFromNBT(NBTTagCompound compound) {

        inventory.deserializeNBT(compound.getCompoundTag("inventory"));
        super.readFromNBT(compound);

    }

    @Override
    public NBTTagCompound writeToNBT(NBTTagCompound compound) {

        compound.setTag("inventory", inventory.serializeNBT());
        return super.writeToNBT(compound);

    }

    @Override
    public boolean hasCapability(Capability<?> capability, @Nullable EnumFacing facing) {

        return capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY || super.hasCapability(capability, facing);

    }

    @Nullable
    @Override
    public <T> T getCapability(Capability<T> capability, @Nullable EnumFacing facing) {

        return capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY ? (T) inventory : super.getCapability(capability, facing);

    }

    @Override
    public NBTTagCompound getUpdateTag() {

        return this.writeToNBT(new NBTTagCompound());

    }

    @Override
    public SPacketUpdateTileEntity getUpdatePacket() {

        return new SPacketUpdateTileEntity(getPos(), 0, writeToNBT(new NBTTagCompound()));

    }

    @Override
    public void onDataPacket(NetworkManager net, SPacketUpdateTileEntity pkt) {

        setPos(pkt.getPos());
        readFromNBT(pkt.getNbtCompound());

    }

    public void collideEntityItem(EntityItem item) {

        if(checkNextFreeSlot() != 100) {

            ItemStack copy = item.getItem().copy();
            int count = copy.getCount();

            if(count <= 1) {

                item.setDead();
                copy.setCount(1);

            } else {

                item.getItem().setCount(item.getItem().getCount() - 1);
                copy.setCount(1);

            }

            inventory.insertItem(checkNextFreeSlot(), copy, false);

        }

    }

    public int checkNextFreeSlot() {

        for(int i=0; i < inventory.getSlots(); i++){

            if(inventory.getStackInSlot(i).isEmpty()) {

                return i;

            }

        }

        return 100;

    }

}

Thanks for listening to me.

Bye.

EDIT:

I'm just an idiot i forgot the "!" before itemStackHandler.getStackFromSlot(i).isEmpty()

Edited November 10, 20196 yr by Zeide