Randomizer bag finished (including recipe, placing blocks). Changed default keybinds to ADD and SUBTRACT. QuickReplace now places under replaceable blocks (tall grass). Mirror now happens before array.

src/main/java/nl/requios/effortlessbuilding/Array.java

@@ -41,11 +41,6 @@ public class Array {
             pos = pos.add(offset);
             if (event.getWorld().isBlockLoaded(pos, true)) {
                 event.getWorld().setBlockState(pos, event.getPlacedBlock());
-
-                //Mirror synergy
-                BlockSnapshot blockSnapshot = new BlockSnapshot(event.getWorld(), pos, event.getPlacedBlock());
-                BlockEvent.PlaceEvent placeEvent = new BlockEvent.PlaceEvent(blockSnapshot, event.getPlacedBlock(), event.getPlayer(), EnumHand.MAIN_HAND);
-                Mirror.onBlockPlaced(placeEvent);
             }
         }
     }
@@ -66,17 +61,7 @@ public class Array {
             pos = pos.add(offset);
             if (event.getWorld().isBlockLoaded(pos, false)) {
                 event.getWorld().setBlockToAir(pos);
-
-                //Mirror synergy
-                BlockEvent.BreakEvent breakEvent = new BlockEvent.BreakEvent(event.getWorld(), pos, event.getState(), event.getPlayer());
-                Mirror.onBlockBroken(breakEvent);
             }
         }
     }
-
-//    @SubscribeEvent
-//    @SideOnly(Side.CLIENT)
-//    public static void onRender(RenderWorldLastEvent event) {
-//
-//    }
 }

src/main/java/nl/requios/effortlessbuilding/EffortlessBuilding.java

@@ -16,7 +16,7 @@ import net.minecraftforge.fml.common.network.NetworkRegistry;
 import net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper;
 import net.minecraftforge.fml.relauncher.Side;
 import nl.requios.effortlessbuilding.capability.*;
-import nl.requios.effortlessbuilding.inventory.RandomizerGuiHandler;
+import nl.requios.effortlessbuilding.gui.RandomizerBagGuiHandler;
 import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
 import nl.requios.effortlessbuilding.network.BuildSettingsMessage;
 import nl.requios.effortlessbuilding.network.QuickReplaceMessage;
@@ -75,7 +75,7 @@ public class EffortlessBuilding
     // Register network handlers
     public void init(FMLInitializationEvent event)
     {
-        NetworkRegistry.INSTANCE.registerGuiHandler(EffortlessBuilding.instance, new RandomizerGuiHandler());
+        NetworkRegistry.INSTANCE.registerGuiHandler(EffortlessBuilding.instance, new RandomizerBagGuiHandler());
         proxy.init(event);
     }
 

src/main/java/nl/requios/effortlessbuilding/EventHandler.java

@@ -5,6 +5,7 @@ import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemBlock;
+import net.minecraft.item.crafting.IRecipe;
 import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.event.AttachCapabilitiesEvent;
 import net.minecraftforge.event.RegistryEvent;
@@ -45,15 +46,15 @@ public class EventHandler
     public static void onBlockPlaced(BlockEvent.PlaceEvent event) {
         QuickReplace.onBlockPlaced(event);
         if (event.isCanceled()) return;
-        Array.onBlockPlaced(event);
         Mirror.onBlockPlaced(event);
+        Array.onBlockPlaced(event);
     }
 
 
     @SubscribeEvent
     public static void onBlockBroken(BlockEvent.BreakEvent event) {
-        Array.onBlockBroken(event);
         Mirror.onBlockBroken(event);
+        Array.onBlockBroken(event);
     }
 
 }

src/main/java/nl/requios/effortlessbuilding/Mirror.java

@@ -9,11 +9,14 @@ import net.minecraft.client.entity.EntityPlayerSP;
 import net.minecraft.client.renderer.BufferBuilder;
 import net.minecraft.client.renderer.Tessellator;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
+import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.util.EnumFacing;
+import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.World;
 import net.minecraftforge.client.event.RenderWorldLastEvent;
+import net.minecraftforge.common.util.BlockSnapshot;
 import net.minecraftforge.event.world.BlockEvent;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
@@ -77,19 +80,19 @@ public class Mirror {
             return;
 
         if (m.mirrorX) {
-            placeMirrorX(event.getWorld(), m, oldBlockPos, event.getPlacedBlock());
+            placeMirrorX(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock());
         }
 
         if (m.mirrorY) {
-            placeMirrorY(event.getWorld(), m, oldBlockPos, event.getPlacedBlock());
+            placeMirrorY(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock());
         }
 
         if (m.mirrorZ) {
-            placeMirrorZ(event.getWorld(), m, oldBlockPos, event.getPlacedBlock());
+            placeMirrorZ(event.getWorld(), event.getPlayer(), m, oldBlockPos, event.getPlacedBlock());
         }
     }
 
-    private static void placeMirrorX(World world, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
+    private static void placeMirrorX(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
         //find mirror position
         double x = m.position.x + (m.position.x - oldBlockPos.getX() - 0.5);
         BlockPos newBlockPos = new BlockPos(x, oldBlockPos.getY(), oldBlockPos.getZ());
@@ -98,13 +101,13 @@ public class Mirror {
         if (world.isBlockLoaded(newBlockPos, true)) {
             newBlockState = oldBlockState.withMirror(net.minecraft.util.Mirror.FRONT_BACK);
 
-            world.setBlockState(newBlockPos, newBlockState);
+            placeBlock(world, player, newBlockPos, newBlockState);
         }
-        if (m.mirrorY) placeMirrorY(world, m, newBlockPos, newBlockState);
+        if (m.mirrorY) placeMirrorY(world, player, m, newBlockPos, newBlockState);
-        if (m.mirrorZ) placeMirrorZ(world, m, newBlockPos, newBlockState);
+        if (m.mirrorZ) placeMirrorZ(world, player, m, newBlockPos, newBlockState);
     }
 
-    private static void placeMirrorY(World world, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
+    private static void placeMirrorY(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
         //find mirror position
         double y = m.position.y + (m.position.y - oldBlockPos.getY() - 0.5);
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), y, oldBlockPos.getZ());
@@ -113,12 +116,12 @@ public class Mirror {
         if (world.isBlockLoaded(newBlockPos, true)) {
             newBlockState = getVerticalMirror(oldBlockState);
 
-            world.setBlockState(newBlockPos, newBlockState);
+            placeBlock(world, player, newBlockPos, newBlockState);
         }
-        if (m.mirrorZ) placeMirrorZ(world, m, newBlockPos, newBlockState);
+        if (m.mirrorZ) placeMirrorZ(world, player, m, newBlockPos, newBlockState);
     }
 
-    private static void placeMirrorZ(World world, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
+    private static void placeMirrorZ(World world, EntityPlayer player, MirrorSettings m, BlockPos oldBlockPos, IBlockState oldBlockState) {
         //find mirror position
         double z = m.position.z + (m.position.z - oldBlockPos.getZ() - 0.5);
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), oldBlockPos.getY(), z);
@@ -127,10 +130,19 @@ public class Mirror {
         if (world.isBlockLoaded(newBlockPos, true)) {
             newBlockState = oldBlockState.withMirror(net.minecraft.util.Mirror.LEFT_RIGHT);
 
-            world.setBlockState(newBlockPos, newBlockState);
+            placeBlock(world, player, newBlockPos, newBlockState);
         }
     }
 
+    private static void placeBlock(World world, EntityPlayer player, BlockPos newBlockPos, IBlockState newBlockState){
+        world.setBlockState(newBlockPos, newBlockState);
+
+        //Array synergy
+        BlockSnapshot blockSnapshot = new BlockSnapshot(world, newBlockPos, newBlockState);
+        BlockEvent.PlaceEvent placeEvent = new BlockEvent.PlaceEvent(blockSnapshot, newBlockState, player, EnumHand.MAIN_HAND);
+        Array.onBlockPlaced(placeEvent);
+    }
+
     private static IBlockState getVerticalMirror(IBlockState blockState) {
         //Stairs
         if (blockState.getBlock() instanceof BlockStairs) {
@@ -199,7 +211,7 @@ public class Mirror {
         BlockPos newBlockPos = new BlockPos(x, oldBlockPos.getY(), oldBlockPos.getZ());
         //break block
         if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
-            event.getWorld().setBlockToAir(newBlockPos);
+            breakBlock(event, newBlockPos);
         }
         if (m.mirrorY) breakMirrorY(event, m, newBlockPos);
         if (m.mirrorZ) breakMirrorZ(event, m, newBlockPos);
@@ -211,7 +223,7 @@ public class Mirror {
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), y, oldBlockPos.getZ());
         //place block
         if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
-            event.getWorld().setBlockToAir(newBlockPos);
+            breakBlock(event, newBlockPos);
         }
         if (m.mirrorZ) breakMirrorZ(event, m, newBlockPos);
     }
@@ -222,10 +234,18 @@ public class Mirror {
         BlockPos newBlockPos = new BlockPos(oldBlockPos.getX(), oldBlockPos.getY(), z);
         //place block
         if (event.getWorld().isBlockLoaded(newBlockPos, true)) {
-            event.getWorld().setBlockToAir(newBlockPos);
+            breakBlock(event, newBlockPos);
         }
     }
 
+    private static void breakBlock(BlockEvent.BreakEvent event, BlockPos newBlockPos){
+        event.getWorld().setBlockToAir(newBlockPos);
+
+        //Array synergy
+        BlockEvent.BreakEvent breakEvent = new BlockEvent.BreakEvent(event.getWorld(), newBlockPos, event.getState(), event.getPlayer());
+        Array.onBlockBroken(breakEvent);
+    }
+
     @SubscribeEvent
     @SideOnly(Side.CLIENT)
     public static void onRender(RenderWorldLastEvent event) {

src/main/java/nl/requios/effortlessbuilding/QuickReplace.java

@@ -48,7 +48,12 @@ public class QuickReplace {
         if (!message.isBlockHit() || message.getBlockPos() == null) return;
 
         BlockPos placedAgainstBlockPos = message.getBlockPos();
-        //placedAgainstBlockPos = placedAgainstBlockPos.down();
+
+        //Get under tall grass and other replaceable blocks
+        if (player.world.getBlockState(placedAgainstBlockPos).getBlock().isReplaceable(player.world, placedAgainstBlockPos)) {
+            placedAgainstBlockPos = placedAgainstBlockPos.down();
+        }
+
         IBlockState blockState = blockStates.get(player.getUniqueID());
         player.world.setBlockState(placedAgainstBlockPos, blockState);
 

src/main/java/nl/requios/effortlessbuilding/capability/ItemHandlerCapabilityProvider.java

@@ -1,4 +1,4 @@
-package nl.requios.effortlessbuilding.inventory;
+package nl.requios.effortlessbuilding.capability;
 
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.util.EnumFacing;
@@ -7,12 +7,13 @@ import net.minecraftforge.common.capabilities.ICapabilitySerializable;
 import net.minecraftforge.items.CapabilityItemHandler;
 import net.minecraftforge.items.IItemHandler;
 import net.minecraftforge.items.ItemStackHandler;
+import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
-public class RandomizerBagCapabilityProvider implements ICapabilitySerializable<NBTTagCompound> {
+public class ItemHandlerCapabilityProvider implements ICapabilitySerializable<NBTTagCompound> {
-    IItemHandler itemHandler = new ItemStackHandler(5);
+    IItemHandler itemHandler = new ItemStackHandler(ItemRandomizerBag.INV_SIZE);
 
     @Override
     public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing) {
@@ -31,11 +32,11 @@ public class RandomizerBagCapabilityProvider implements ICapabilitySerializable<
 
     @Override
     public NBTTagCompound serializeNBT() {
-        return ((ItemStackHandler)itemHandler).serializeNBT();
+        return ((ItemStackHandler) itemHandler).serializeNBT();
     }
 
     @Override
     public void deserializeNBT(NBTTagCompound nbt) {
-        ((ItemStackHandler)itemHandler).deserializeNBT(nbt);
+        ((ItemStackHandler) itemHandler).deserializeNBT(nbt);
     }
 }

src/main/java/nl/requios/effortlessbuilding/gui/RandomizerBagContainer.java

@@ -1,4 +1,4 @@
-package nl.requios.effortlessbuilding.inventory;
+package nl.requios.effortlessbuilding.gui;
 
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.entity.player.InventoryPlayer;
@@ -10,30 +10,34 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.util.EnumHand;
 import net.minecraftforge.items.IItemHandler;
 import net.minecraftforge.items.SlotItemHandler;
+import nl.requios.effortlessbuilding.item.ItemRandomizerBag;
 
 public class RandomizerBagContainer extends Container {
 
     private final IItemHandler bagInventory;
     private final int sizeInventory;
 
+    private static final int INV_START = ItemRandomizerBag.INV_SIZE, INV_END = INV_START + 26,
+            HOTBAR_START = INV_END + 1, HOTBAR_END = HOTBAR_START + 8;
+
     public RandomizerBagContainer(InventoryPlayer parInventoryPlayer, IItemHandler parIInventory) {
         bagInventory = parIInventory;
         sizeInventory = bagInventory.getSlots();
         for (int i = 0; i < sizeInventory; ++i) {
-            this.addSlotToContainer(new SlotItemHandler(bagInventory, i, 80 + (18 * (i / 4)), 8 + (18 * (i % 4))));
+            this.addSlotToContainer(new SlotItemHandler(bagInventory, i, 44 + (18 * i), 20));
         }
 
         // add player inventory slots
         int i;
         for (i = 0; i < 3; ++i) {
             for (int j = 0; j < 9; ++j) {
-                addSlotToContainer(new Slot(parInventoryPlayer, j + i * 9 + 9, 8 + j * 18, 84 + i * 18));
+                addSlotToContainer(new Slot(parInventoryPlayer, j + i * 9 + 9, 8 + j * 18, 51 + i * 18));
             }
         }
 
         // add hotbar slots
         for (i = 0; i < 9; ++i) {
-            addSlotToContainer(new Slot(parInventoryPlayer, i, 8 + i * 18, 142));
+            addSlotToContainer(new Slot(parInventoryPlayer, i, 8 + i * 18, 109));
         }
     }
 
@@ -43,58 +47,58 @@ public class RandomizerBagContainer extends Container {
     }
 
     @Override
-    public ItemStack transferStackInSlot(EntityPlayer playerIn,
+    public ItemStack transferStackInSlot(EntityPlayer playerIn, int slotIndex) {
-                                         int slotIndex) {
+        ItemStack itemstack = null;
-        ItemStack itemStack1 = null;
+        Slot slot = this.inventorySlots.get(slotIndex);
-        Slot slot = inventorySlots.get(slotIndex);
 
         if (slot != null && slot.getHasStack()) {
-            ItemStack itemStack2 = slot.getStack();
+            ItemStack itemstack1 = slot.getStack();
-            itemStack1 = itemStack2.copy();
+            itemstack = itemstack1.copy();
 
-            if (slotIndex == 0) {
+            // If item is in our custom inventory
-                if (!mergeItemStack(itemStack2, sizeInventory,
+            if (slotIndex < INV_START) {
-                        sizeInventory + 36, true)) {
+                // try to place in player inventory / action bar
+                if (!this.mergeItemStack(itemstack1, INV_START, HOTBAR_END + 1, true)) {
                     return null;
                 }
 
-                slot.onSlotChange(itemStack2, itemStack1);
+                slot.onSlotChange(itemstack1, itemstack);
-            } else if (slotIndex != 1) {
+            }
-                if (slotIndex >= sizeInventory
+            // Item is in inventory / hotbar, try to place in custom inventory or armor slots
-                        && slotIndex < sizeInventory + 27) // player inventory slots
+            else {
-                {
+                /**
-                    if (!mergeItemStack(itemStack2, sizeInventory + 27,
+                 * Implementation number 1: Shift-click into your custom inventory
-                            sizeInventory + 36, false)) {
+                 */
+                if (slotIndex >= INV_START) {
+                    // place in custom inventory
+                    if (!this.mergeItemStack(itemstack1, 0, INV_START, false)) {
                         return null;
                     }
-                } else if (slotIndex >= sizeInventory + 27
-                        && slotIndex < sizeInventory + 36
-                        && !mergeItemStack(itemStack2, sizeInventory + 1,
-                        sizeInventory + 27, false)) // hotbar slots
-                {
-                    return null;
-                }
-            } else if (!mergeItemStack(itemStack2, sizeInventory,
-                    sizeInventory + 36, false)) {
-                return null;
                 }
 
-            if (itemStack2.getCount() == 0) {
+            }
-                slot.putStack(null);
+
+            if (itemstack1.getCount() == 0) {
+                slot.putStack(ItemStack.EMPTY);
             } else {
                 slot.onSlotChanged();
             }
 
-            if (itemStack2.getCount() == itemStack1.getCount()) {
+            if (itemstack1.getCount() == itemstack.getCount()) {
                 return null;
             }
 
-            slot.onTake(playerIn, itemStack2);
+            slot.onTake(playerIn, itemstack1);
         }
 
-        return itemStack1;
+        return itemstack;
     }
 
+    /**
+     * You should override this method to prevent the player from moving the stack that
+     * opened the inventory, otherwise if the player moves it, the inventory will not
+     * be able to save properly
+     */
     @Override
     public ItemStack slotClick(int slot, int dragType, ClickType clickTypeIn, EntityPlayer player) {
         // this will prevent the player from interacting with the item that opened the inventory:

src/main/java/nl/requios/effortlessbuilding/gui/RandomizerBagGuiContainer.java

@@ -1,9 +1,8 @@
-package nl.requios.effortlessbuilding.inventory;
+package nl.requios.effortlessbuilding.gui;
 
 import net.minecraft.client.gui.inventory.GuiContainer;
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.entity.player.InventoryPlayer;
-import net.minecraft.inventory.IInventory;
 import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
@@ -12,35 +11,37 @@ import nl.requios.effortlessbuilding.EffortlessBuilding;
 
 @SideOnly(Side.CLIENT)
 public class RandomizerBagGuiContainer extends GuiContainer {
-    private static final ResourceLocation grinderGuiTextures =
+    private static final ResourceLocation guiTextures =
-            new ResourceLocation(EffortlessBuilding.MODID
+            new ResourceLocation(EffortlessBuilding.MODID + ":textures/gui/container/randomizerbag.png");
-                    + ":textures/gui/container/randomizerbag.png");
     private final InventoryPlayer inventoryPlayer;
     private final IItemHandler inventoryBag;
 
-    public RandomizerBagGuiContainer(InventoryPlayer parInventoryPlayer,
+    public RandomizerBagGuiContainer(InventoryPlayer inventoryPlayer, IItemHandler inventoryBag) {
-                                     IItemHandler parInventoryBag) {
+        super(new RandomizerBagContainer(inventoryPlayer, inventoryBag));
-        super(new RandomizerBagContainer(parInventoryPlayer,
+        this.inventoryPlayer = inventoryPlayer;
-                parInventoryBag));
+        this.inventoryBag = inventoryBag;
-        inventoryPlayer = parInventoryPlayer;
+
-        inventoryBag = parInventoryBag;
+        ySize = 134;
+    }
+
+    @Override
+    public void drawScreen(int mouseX, int mouseY, float partialTicks) {
+        drawDefaultBackground();
+        super.drawScreen(mouseX, mouseY, partialTicks);
+        this.renderHoveredToolTip(mouseX, mouseY);
     }
 
     @Override
     protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY) {
-        String s = "Randomizer bag";
+        String s = "Randomizer Bag";
-        fontRenderer.drawString(s, xSize / 2 - fontRenderer.getStringWidth(s) / 2, 6, 4210752);
+        fontRenderer.drawString(s, 8, 6, 0x404040);
-        fontRenderer.drawString(inventoryPlayer.getDisplayName().getUnformattedText(), 8, ySize - 96 + 2, 4210752);
+        fontRenderer.drawString(inventoryPlayer.getDisplayName().getUnformattedText(), 8, ySize - 96 + 2, 0x404040);
     }
 
-    /**
-     * Args : renderPartialTicks, mouseX, mouseY
-     */
     @Override
-    protected void drawGuiContainerBackgroundLayer(float partialTicks,
+    protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) {
-                                                   int mouseX, int mouseY) {
         GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
-        mc.getTextureManager().bindTexture(grinderGuiTextures);
+        mc.getTextureManager().bindTexture(guiTextures);
         int marginHorizontal = (width - xSize) / 2;
         int marginVertical = (height - ySize) / 2;
         drawTexturedModalRect(marginHorizontal, marginVertical, 0, 0, xSize, ySize);

src/main/java/nl/requios/effortlessbuilding/gui/RandomizerBagGuiHandler.java

@@ -1,24 +1,22 @@
-package nl.requios.effortlessbuilding.inventory;
+package nl.requios.effortlessbuilding.gui;
 
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.util.EnumHand;
 import net.minecraft.world.World;
 import net.minecraftforge.fml.common.network.IGuiHandler;
 import net.minecraftforge.items.CapabilityItemHandler;
-import net.minecraftforge.items.IItemHandler;
-import net.minecraftforge.items.ItemStackHandler;
 import nl.requios.effortlessbuilding.EffortlessBuilding;
-import nl.requios.effortlessbuilding.inventory.RandomizerBagContainer;
 
 import javax.annotation.Nullable;
 
-public class RandomizerGuiHandler implements IGuiHandler {
+public class RandomizerBagGuiHandler implements IGuiHandler {
     @Nullable
     @Override
     public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
         if (ID == EffortlessBuilding.RANDOMIZER_BAG_GUI) {
-            // Use the player's held item to create the inventory
+            // Use the player's held item to create the container
-            return new RandomizerBagContainer(player.inventory, player.getHeldItem(EnumHand.MAIN_HAND).getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null));
+            return new RandomizerBagContainer(player.inventory,
+                    player.getHeldItem(EnumHand.MAIN_HAND).getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null));
         }
         return null;
     }
@@ -27,9 +25,9 @@ public class RandomizerGuiHandler implements IGuiHandler {
     @Override
     public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
         if (ID == EffortlessBuilding.RANDOMIZER_BAG_GUI) {
-            // We have to cast the new container as our custom class
+            // Use the player's held item to create the client-side gui container
-            // and pass in currently held item for the inventory
+            return new RandomizerBagGuiContainer(player.inventory,
-            return new RandomizerBagGuiContainer(player.inventory, player.getHeldItem(EnumHand.MAIN_HAND).getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null));
+                    player.getHeldItem(EnumHand.MAIN_HAND).getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null));
         }
         return null;
     }

src/main/java/nl/requios/effortlessbuilding/item/ItemRandomizerBag.java

@@ -1,57 +1,122 @@
 package nl.requios.effortlessbuilding.item;
 
+import net.minecraft.block.Block;
+import net.minecraft.block.SoundType;
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.client.util.ITooltipFlag;
 import net.minecraft.creativetab.CreativeTabs;
+import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.Item;
+import net.minecraft.item.ItemBlock;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.util.ActionResult;
+import net.minecraft.util.*;
-import net.minecraft.util.EnumActionResult;
-import net.minecraft.util.EnumFacing;
-import net.minecraft.util.EnumHand;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraftforge.common.capabilities.ICapabilityProvider;
+import net.minecraftforge.items.CapabilityItemHandler;
+import net.minecraftforge.items.IItemHandler;
 import nl.requios.effortlessbuilding.EffortlessBuilding;
-import nl.requios.effortlessbuilding.inventory.RandomizerBagCapabilityProvider;
+import nl.requios.effortlessbuilding.capability.ItemHandlerCapabilityProvider;
 
 import javax.annotation.Nullable;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
 
 public class ItemRandomizerBag extends Item {
+    public static final int INV_SIZE = 5;
 
-    public ItemRandomizerBag(){
+    private Random rand;
+
+    public ItemRandomizerBag() {
         this.setRegistryName(EffortlessBuilding.MODID, "randomizer_bag");
         this.setUnlocalizedName(this.getRegistryName().toString());
 
         this.maxStackSize = 1;
         this.setCreativeTab(CreativeTabs.DECORATIONS);
+        rand = new Random(1337);
     }
 
     @Override
-    public EnumActionResult onItemUse(EntityPlayer player, World worldIn, BlockPos pos, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) {
+    public EnumActionResult onItemUse(EntityPlayer player, World world, BlockPos pos, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) {
 
-        if (worldIn.isRemote) return EnumActionResult.PASS;
+        if (player.isSneaking()) {
-        EffortlessBuilding.log(player, "onItemUse");
+            if (world.isRemote) return EnumActionResult.SUCCESS;
-
-        if (player.isSneaking()){
             //Open inventory
-            player.openGui(EffortlessBuilding.instance, EffortlessBuilding.RANDOMIZER_BAG_GUI, worldIn, 0, 0, 0);
+            player.openGui(EffortlessBuilding.instance, EffortlessBuilding.RANDOMIZER_BAG_GUI, world, 0, 0, 0);
         } else {
             //Place block
-
+            return placeRandomBlockFromBag(player, world, pos, hand, facing, hitX, hitY, hitZ);
         }
-        return EnumActionResult.PASS;
+        return EnumActionResult.SUCCESS;
+    }
+
+    private EnumActionResult placeRandomBlockFromBag(EntityPlayer player, World world, BlockPos pos, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ){
+        //Get bag inventory
+        ItemStack bag = player.getHeldItem(hand);
+        if (!bag.hasCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null)) return EnumActionResult.FAIL;
+        IItemHandler bagInventory = bag.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null);
+
+        //Find how many stacks are non-empty, and save them in a list
+        int nonempty = 0;
+        List<ItemStack> nonEmptyStacks = new ArrayList<>(5);
+        List<Integer> originalSlots = new ArrayList<>(5);
+        for (int i = 0; i < bagInventory.getSlots(); i++) {
+            ItemStack stack = bagInventory.getStackInSlot(i);
+            if (!stack.isEmpty()) {
+                nonempty++;
+                nonEmptyStacks.add(stack);
+                originalSlots.add(i);
+            }
+        }
+
+        if (nonEmptyStacks.size() != originalSlots.size()) throw new Error("NonEmptyStacks and OriginalSlots not same size");
+
+        if (nonempty == 0) return EnumActionResult.FAIL;
+
+        //Pick random slot
+        int randomSlot = rand.nextInt(nonempty);
+
+        ItemStack toPlace = nonEmptyStacks.get(randomSlot);
+        if (toPlace.isEmpty()) return EnumActionResult.FAIL;
+
+        if (toPlace.getItem() instanceof ItemBlock) {
+            IBlockState existingBlockState = world.getBlockState(pos);
+            Block existingBlock = existingBlockState.getBlock();
+
+            if (!existingBlock.isReplaceable(world, pos))
+            {
+                pos = pos.offset(facing);
+            }
+
+            Block block = Block.getBlockFromItem(toPlace.getItem());
+            if (!toPlace.isEmpty() && player.canPlayerEdit(pos, facing, toPlace) && world.mayPlace(block, pos, false, facing, (Entity)null)) {
+                IBlockState blockState = block.getStateForPlacement(world, pos, facing, hitX, hitY, hitZ, toPlace.getMetadata(), player, hand);
+                if (world.setBlockState(pos, blockState)){
+                    SoundType soundType = block.getSoundType(blockState, world, pos, player);
+                    world.playSound(player, pos, soundType.getPlaceSound(), SoundCategory.BLOCKS, (soundType.getVolume() + 1.0F) / 2.0F, soundType.getPitch() * 0.8F);
+
+                    if (!player.isCreative())
+                        bagInventory.extractItem(originalSlots.get(randomSlot), 1, false);
+                }
+
+                //((ItemBlock) toPlace.getItem()).placeBlockAt(toPlace, player, world, pos, facing, hitX, hitY, hitZ, blockState);
+                //return ((ItemBlock) toPlace.getItem()).onItemUse(player, world, pos, hand, facing, hitX, hitY, hitZ);
+            }
+        }
+        return EnumActionResult.SUCCESS;
     }
 
     @Override
-    public ActionResult<ItemStack> onItemRightClick(World worldIn, EntityPlayer playerIn, EnumHand handIn) {
+    public ActionResult<ItemStack> onItemRightClick(World world, EntityPlayer player, EnumHand hand) {
-        if (worldIn.isRemote) return new ActionResult<>(EnumActionResult.PASS, playerIn.getHeldItem(handIn));
+        if (world.isRemote) return new ActionResult<>(EnumActionResult.PASS, player.getHeldItem(hand));
-        EffortlessBuilding.log(playerIn, "onItemRightClick");
 
         //Open inventory
-        playerIn.openGui(EffortlessBuilding.instance, EffortlessBuilding.RANDOMIZER_BAG_GUI, worldIn, 0, 0, 0);
+        player.openGui(EffortlessBuilding.instance, EffortlessBuilding.RANDOMIZER_BAG_GUI, world, 0, 0, 0);
 
-        return new ActionResult<>(EnumActionResult.PASS, playerIn.getHeldItem(handIn));
+        return new ActionResult<>(EnumActionResult.PASS, player.getHeldItem(hand));
     }
 
     @Override
@@ -62,6 +127,12 @@ public class ItemRandomizerBag extends Item {
     @Nullable
     @Override
     public ICapabilityProvider initCapabilities(ItemStack stack, @Nullable NBTTagCompound nbt) {
-        return new RandomizerBagCapabilityProvider();
+        return new ItemHandlerCapabilityProvider();
+    }
+
+    @Override
+    public void addInformation(ItemStack stack, @Nullable World world, List<String> tooltip, ITooltipFlag flag) {
+        tooltip.add("Sneak + rightclick to open inventory");
+        tooltip.add("Rightclick to place a random block");
     }
 }

src/main/java/nl/requios/effortlessbuilding/proxy/ClientProxy.java

@@ -42,8 +42,8 @@ public class ClientProxy implements IProxy {
         keyBindings = new KeyBinding[2];
 
         // instantiate the key bindings
-        keyBindings[0] = new KeyBinding("key.hud.desc", Keyboard.KEY_NUMPAD0, "key.effortlessbuilding.category");
+        keyBindings[0] = new KeyBinding("key.hud.desc", Keyboard.KEY_ADD, "key.effortlessbuilding.category");
-        keyBindings[1] = new KeyBinding("key.replace.desc", Keyboard.KEY_NUMPAD1, "key.effortlessbuilding.category");
+        keyBindings[1] = new KeyBinding("key.replace.desc", Keyboard.KEY_SUBTRACT, "key.effortlessbuilding.category");
 
         // register all the key bindings
         for (int i = 0; i < keyBindings.length; ++i) {

src/main/resources/assets/effortlessbuilding/models/item/randomizer_bag.json

@@ -1,6 +1,6 @@
 {
     "parent": "item/generated",
     "textures": {
-        "layer0": "items/fireball"
+        "layer0": "effortlessbuilding:items/randomizerbag"
     }
 }

src/main/resources/assets/effortlessbuilding/recipes/randomizer_bag.json

@@ -0,0 +1,20 @@
+{
+    "type": "minecraft:crafting_shaped",
+    "pattern": [
+        " # ",
+        "#O#",
+        " # "
+    ],
+    "key": {
+        "#": {
+            "item": "minecraft:leather"
+        },
+		"O": {
+            "item": "minecraft:planks",
+			"data": 32767
+        }
+    },
+    "result": {
+        "item": "effortlessbuilding:randomizer_bag"
+    }
+}