Java tutorial
/** * MrCrayfish's Furniture Mod * Copyright (C) 2014 MrCrayfish (http://www.mrcrayfish.com/) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.mrcrayfish.furniture.gui; import net.minecraft.client.gui.GuiButton; import net.minecraft.client.gui.inventory.GuiContainer; import net.minecraft.entity.player.EntityPlayer; import net.minecraft.entity.player.InventoryPlayer; import net.minecraft.inventory.IInventory; import net.minecraft.item.ItemStack; import net.minecraft.nbt.NBTTagList; import net.minecraft.util.ChatComponentText; import net.minecraft.util.ResourceLocation; import org.lwjgl.input.Keyboard; import org.lwjgl.opengl.GL11; import com.mrcrayfish.furniture.gui.containers.ContainerEnvelope; import com.mrcrayfish.furniture.gui.inventory.InventoryEnvelope; import com.mrcrayfish.furniture.init.FurnitureItems; import com.mrcrayfish.furniture.network.PacketHandler; import com.mrcrayfish.furniture.network.message.MessageEnvelope; import com.mrcrayfish.furniture.util.NBTHelper; public class GuiEnvelope extends GuiContainer { private static final ResourceLocation gui = new ResourceLocation("cfm:textures/gui/envelope.png"); private GuiButton buttonOk; private EntityPlayer player; private InventoryEnvelope inventory; private ItemStack mail; public GuiEnvelope(InventoryPlayer inventoryplayer, IInventory inventoryMail, EntityPlayer player, ItemStack mail) { super(new ContainerEnvelope(inventoryplayer, inventoryMail)); this.player = player; this.inventory = (InventoryEnvelope) inventoryMail; this.mail = mail; } protected void drawGuiContainerForegroundLayer(int par1, int par2) { this.fontRendererObj.drawString("Envelope", xSize / 2 - 22, 5, 9999999); this.fontRendererObj.drawString("Inventory", 8, (ySize - 96) + 2, 4210752); } protected void drawGuiContainerBackgroundLayer(float f, int i, int j) { GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F); this.mc.getTextureManager().bindTexture(gui); int l = (width - xSize) / 2; int i1 = (height - ySize) / 2; this.drawTexturedModalRect(l, i1, 0, 0, xSize, ySize); } @Override public void initGui() { super.initGui(); Keyboard.enableRepeatEvents(false); buttonList.clear(); int posX = width / 2 + 40; int posY = height / 2 - 50; if (player.getCurrentEquippedItem() != null) { ItemStack mail = player.getCurrentEquippedItem(); if (mail.getItem() == FurnitureItems.itemEnvelope) { buttonOk = new GuiButton(0, posX, posY, 40, 20, "Sign"); buttonOk.enabled = true; buttonList.add(buttonOk); } } } @Override public void onGuiClosed() { super.onGuiClosed(); this.inventory.saveInventory(); } @Override protected void actionPerformed(GuiButton guibutton) { if (!guibutton.enabled) { return; } if (guibutton.id == 0) { if (player.getCurrentEquippedItem() != null) { NBTTagList list = (NBTTagList) NBTHelper.getCompoundTag(mail, "Envelope").getTag("Items"); if (list.tagCount() > 0) { PacketHandler.INSTANCE.sendToServer(new MessageEnvelope(this.mail)); this.mc.displayGuiScreen(null); } else { this.player.addChatMessage(new ChatComponentText("You cannot sign an empty envelope.")); } } } } }