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[1.11] Moving Position of Slots in Container


KnowYourKnot

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Using Forge version 1.11-13.19.1.2195. I've set up a block, tile entity, container and GUI, and I want the container's slots to appear/disappear when a certain item is placed in one of the slots. I have tried setting each slot's xPosition, however the container's slots are only redrawn when the container is closed and re-opened. Is there a way to change the positions of the slots whilst the GUI for the block is still open?

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This is my container class. As far as I understand detectAndSendChanges() runs every tick, so that means as soon as the GUI is opened, slot 4 should be moved to position (0,0), and slot 3 should be moved to position (10,10). But this doesn't happen.

 

package kemm.common.container;

import kemm.Util;
import kemm.common.block.SingleSlotBlock;
import kemm.common.item.modules.Module;
import kemm.common.item.modules.Module.EnumPosition;
import kemm.common.tileentity.SingleSlot;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.IItemHandler;
import net.minecraftforge.items.SlotItemHandler;

public class ContainerBlock extends Container {

private SingleSlot te;
private World blockWorld;
private BlockPos position;
private IInventory plInv;

public ContainerBlock(IInventory playerInv, SingleSlot tile_entity, World worldIn, BlockPos pos) {
	this.te = tile_entity;
	this.blockWorld = worldIn;
	this.position = pos;
	this.plInv = playerInv;
	addBlockSlots();
	addPlayerSlots(playerInv);
	System.out.println("Drawing container");
}

private void addPlayerSlots(IInventory playerInv) {
	//Inventory
	for (int row = 0; row < 3; row++) {
		for (int col = 0; col < 9; col++) {
			int x = 48 + col * 18;
			int y = 171 + row * 18;
			this.addSlotToContainer(new Slot(playerInv, col + row * 9 + 9, x, y));
		}
	}
	//Hotbar
	for (int col = 0; col < 9; col++) {
		int x = 48 + col * 18;
		int y = 229;
		this.addSlotToContainer(new Slot(playerInv, col, x, y));
	}
}

private void addBlockSlots() {

	IItemHandler handler = this.te.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null);
	//Draw module-input slots
	for (int col = 0; col < 2; col++ ) {
		for(int row = 0; row < 3; row++) {
			int slotNo = row + col*3;
			int x = col * 90 + 75;
			int y = row * 18 + 62;

			if (slotNo < SingleSlotBlock.size) {
				addSlotToContainer(new SlotModule(handler, this, slotNo, x, y));
			}
		}

	}		
}


@Override
public ItemStack transferStackInSlot(EntityPlayer playerIn, int index) {
	return null;
}

@Override
public boolean canInteractWith(EntityPlayer playerIn) {
	return te.canInteractWith(playerIn);
}


@Override
public void detectAndSendChanges() {
	setSlotPosition(this.getSlot(4), 0, 0);
	setSlotPosition(this.getSlot(3), 10, 10);
	super.detectAndSendChanges();
}



public void setSlotPosition(Slot slot, int xPos, int yPos) {
	slot.xDisplayPosition = xPos;
	slot.yDisplayPosition = yPos;
}

}

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