Hello all,

 

A few days ago I started playing around with Forge, and I'm having fun with it for the most part, but I'm stuck on getting the gui buttons to upgrade my item.

 

 

What I want:

Rightclick an item -> open interface -> options/buttons to upgrade item in question -> actually upgrade the item [dmg/speed/etc.]

 

I've searched for a while and followed tutorials such as http://www.minecraftforge.net/wiki/Containers_and_GUIs

 

 

I know I'm supposed to do something with a Container in order to sync the client with the server but I'm not sure how.

I could really use a push in the right direction.

 

 

 

What I'm doing currently:

 

In my Pickaxe<Extends ItemTool>'s onItemRightClick I'm calling player.openGui()

 

@Override
public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {
    if (world.isRemote) {//client
        player.openGui(PassiveEnchanting.instance, PassiveEnchanting.GUI_ITEM_UPGRADE, world, (int) player.posX, (int) player.posY, (int) player.posZ);
    }
    return super.onItemRightClick(itemStack, world, player);
}

 

In my mod's preinit I've registered a gui handler which goes like

@Mod.EventHandler
public void preInit(FMLPreInitializationEvent event) {
    NetworkRegistry.INSTANCE.registerGuiHandler(instance, new GuiProxy());
}

 

The guiproxy creates the gui object for the client.

public class GuiProxy implements IGuiHandler {
    @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 == PassiveEnchanting.GUI_ITEM_UPGRADE) {
    return new ItemUpgradeGui(player);
        }
        return null;
    }
}

 

I think the problem lies in the ItemUpgradeGui.actionPerformed method. At the moment I'm just sending the player's equiped itemstack to the Item class.

 

 

public class ItemUpgradeGui extends GuiScreen {
public static final int GUI_ID = PassiveEnchanting.GUI_ITEM_UPGRADE;
private EntityPlayer player;
private ItemStack equipedItem;
private boolean pickaxe = false;
private int startX = 75, startY = 50;
private String owner = "";
private int level = 0, xp = 0, points = 0;
private String[] statNames;
private int[] statValues;

public ItemUpgradeGui(EntityPlayer player) {
	this.player = player;
	equipedItem = player.getCurrentEquippedItem();
	pickaxe = equipedItem.getUnlocalizedName().equals(Names.Items.getFullName(Names.Items.LIVING_PICKAXE));
	loadItem(equipedItem);
}

public void loadItem(ItemStack itemStack) {
	if (pickaxe) {
		statNames = ((ItemLivingPickaxe) PEItems.pickaxe).getSpecialStats();
		statValues = new int[statNames.length];
		if (itemStack.getTagCompound() != null) {
			owner = itemStack.stackTagCompound.getString("owner");
			level = itemStack.stackTagCompound.getInteger("level");
			xp = itemStack.stackTagCompound.getInteger("xp");
			points = itemStack.stackTagCompound.getInteger("points");
			for (int i = 0; i < statNames.length; i++) {
				statValues[i] = itemStack.stackTagCompound.getInteger("stat_" + statValues[i]);
			}
		}
	}
}

@Override
public void initGui() {//id,x,y,w,h,display
	buttonList.clear();
	//drawString are: string, x, y, color
	for (int i = 0; i < statNames.length; i++) {
		buttonList.add(new GuiButton(i, startX, startY + (i * 20), 100, 20, String.format("%s [%s]", statNames[i], statValues[i])));
	}
}

@Override
public boolean doesGuiPauseGame() {
	return false;
}

@Override
public void drawScreen(int i, int j, float f) {
	drawDefaultBackground();
	super.drawScreen(i, j, f);
	fontRendererObj.drawStringWithShadow("Pickaxe upgrade menu", startX, startY - 20, 0xffFFFFFF);
	for (int ii = 0; i < statNames.length; i++) {
		fontRendererObj.drawString("Current: " + statValues[i], startX + 120, startY + 5 + (ii * 20), 0xffffffff);
	}
	if (points > 0) {
		fontRendererObj.drawString("You have " + points + " point(s) left!", startX, startY + 105, 0xffffffff);
	}
}

@Override
public void actionPerformed(GuiButton button) {
	System.out.println(String.format("Clicked on %s", statNames[button.id]));
	if (pickaxe) {
		((ItemLivingPickaxe) PEItems.pickaxe).upgradeStat(equipedItem, statNames[button.id]);
		loadItem(equipedItem);
	}
}
}

 

 

 

 

The complete project can be found at https://bitbucket.org/novaz/passive-enchants/src

 

what does your upgradeStat method look like?

what does your upgradeStat method look like?

Thats the method where I store the upgrades

 

public void upgradeStat(ItemStack itemStack, String statName) {
	if (itemStack.stackTagCompound != null && Arrays.asList(stats).contains(statName)) {
		int points = itemStack.stackTagCompound.getInteger("points");
		if (points > 0) {
			itemStack.stackTagCompound.setInteger("stats_" + statName, itemStack.stackTagCompound.getInteger("stats_" + statName) + 1);
			itemStack.stackTagCompound.setInteger("points", points - 1);
			System.out.println("upgraded " + statName);
		}
	}
}

 

 

You will have to send packets. You cannot change data about Items on the client, and a Gui is always client-only.

 

Could I use something like http://www.minecraftforge.net/wiki/Advanced_Packet_Handling ? Or is it outdated

 

Thanks I think I understand.

If I wanted to add more variables to the message I can just put it below the other ByteBufUtils.write.. and I just need to make sure I read it in the same sequence?

 

But how do I go from there to the players equiped item, can I just use the MessageContext.playerEntity.getCurrentEquippedItem() or is it a bad way to do it like that since the equipment slot could potentially have changed?