Hello, I am new to modding so I got a bit confused on how GUI works, watched a few tutorials but all of them are for specific blocks GUI, my idea is a bit different.

My idea is to open a GUI when ever a player interacts with another, on the player that interacts it would open a GUI saying "Waiting..." and on the other player it would open a GUI with two buttons saying "Yes" or "No".

My code to get the interaction working is the following:

@SubscribeEvent
public void onRingUsage(EntityInteract event) {
  if (event.getTarget() instanceof EntityPlayer) {
    if (event.getEntityPlayer().isSneaking()) {
      if (event.getEntityPlayer().getHeldItemMainhand() != null) {
        if(event.getEntityPlayer().getHeldItemMainhand().getItem() == ModItems.ring) {
          //Opens different GUI on both players here
        }
      }
    }
  }
}

I really don't know how to open the GUIs for both players, can someone help me?

 

Cheers.

23 minutes ago, diesieben07 said:

You would use the same technique you use for other GUIs: You make an IGuiHandler and then use EntityPlayer::openGui to open it.

Thank you!

Got it to work i think, though it's not really working how I wanted, would you mind taking a look at my code?

GuiHandler.java:

public class GuiHandler implements IGuiHandler {	

	public static final int GUI_ID_ASK = 0;
	public static final int GUI_ID_WAITING = 1;
    
	@Override
	public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
		return null;
	}
	@Override
	public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
		if (ID == GUI_ID_ASK) {
	        return new GuiAsk();
		}
		if (ID == GUI_ID_WAITING) {
			return new GuiWaiting();
		}
		return null;
	}	
}

EventsHandler.java

@SubscribeEvent
public void onRingUsage(EntityInteract event) {
	if (event.getTarget() instanceof EntityPlayer) {
		if (event.getEntityPlayer().isSneaking()) {
			if (event.getEntityPlayer().getHeldItemMainhand() != null) {
				if(event.getEntityPlayer().getHeldItemMainhand().getItem() == ModItems.ring) {
					if (event.getWorld().isRemote) {
						EntityPlayer player = event.getWorld().getPlayerEntityByUUID(event.getTarget().getUniqueID());
						player.openGui(Marriage.instance, 0, event.getWorld(), (int) player.posX, (int) player.posY, (int) player.posZ);
				    	event.getEntityPlayer().openGui(Marriage.instance, 1, event.getWorld(), (int) event.getEntityPlayer().posX, (int) event.getEntityPlayer().posY, (int) event.getEntityPlayer().posZ);
					}
				}
			}
		}
	}
}

 

With this, only one GUI opens, always on the clicking player.

40 minutes ago, diesieben07 said:

Only call openGui on the server. You must have a Container as well if you want to do it this way.

Otherwise you would need a custom packet to send to the client to open the GUI there using Minecraft::displayGuiScreen.

Isn't container needed only if the GUI has inventory?

2 hours ago, diesieben07 said:

No, Container is needed if you want a server-side representation of the GUI. It does not necessarily need to have inventory slots.

I've been trying a lot but I don't seem to be able to get it to work, would it be okay if you showed me an example of a container that would work with my case?

show your code

You need to invert your isRemote check. That means it is client side, and you cannot open a GUI on a different client from your client.