diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index 3c2d603ef..6320bdb37 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -26,6 +26,7 @@ use pocketmine\command\CommandSender;
 use pocketmine\entity\DroppedItem;
 use pocketmine\entity\Human;
 use pocketmine\event\inventory\InventoryCloseEvent;
+use pocketmine\event\inventory\InventoryPickupItemEvent;
 use pocketmine\event\player\PlayerAchievementAwardedEvent;
 use pocketmine\event\player\PlayerChatEvent;
 use pocketmine\event\player\PlayerCommandPreprocessEvent;
@@ -1209,6 +1210,11 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 							continue;
 						}
 
+						$this->server->getPluginManager()->callEvent($ev = new InventoryPickupItemEvent($this->inventory, $item));
+						if($ev->isCancelled()){
+							continue;
+						}
+
 						switch($item->getID()){
 							case Item::WOOD:
 								$this->awardAchievement("mineWood");
@@ -1217,6 +1223,7 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 								$this->awardAchievement("diamond");
 								break;
 						}
+
 						$pk = new TakeItemEntityPacket;
 						$pk->eid = 0;
 						$pk->target = $entity->getID();
@@ -1998,7 +2005,6 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 					break;
 				}
 
-				console("[TRANSACTION] {$this->username} {$packet->windowid}[ ".$packet->item->getID().":".$packet->item->getDamage()."(".$packet->item->getCount().") -> #{$packet->slot} ]");
 				if($this->currentTransaction === null or $this->currentTransaction->getCreationTime() > (microtime(true) - 1)){
 					$this->currentTransaction = new SimpleTransactionGroup();
 				}
@@ -2045,6 +2051,40 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 						//	return false;
 						//}
 
+						/*switch($item->getID()){
+							case Item::WORKBENCH:
+								$this->awardAchievement("buildWorkBench");
+								break;
+							case Item::WOODEN_PICKAXE:
+								$this->awardAchievement("buildPickaxe");
+								break;
+							case Item::FURNACE:
+								$this->awardAchievement("buildFurnace");
+								break;
+							case Item::WOODEN_HOE:
+								$this->awardAchievement("buildHoe");
+								break;
+							case Item::BREAD:
+								$this->awardAchievement("makeBread");
+								break;
+							case Item::CAKE:
+								$this->awardAchievement("bakeCake");
+								$this->inventory->addItem(Item::get(Item::BUCKET, 0, 3));
+								break;
+							case Item::STONE_PICKAXE:
+							case Item::GOLD_PICKAXE:
+							case Item::IRON_PICKAXE:
+							case Item::DIAMOND_PICKAXE:
+								$this->awardAchievement("buildBetterPickaxe");
+								break;
+							case Item::WOODEN_SWORD:
+								$this->awardAchievement("buildSword");
+								break;
+							case Item::DIAMOND:
+								$this->awardAchievement("diamond");
+								break;
+						}*/
+
 						$craftingGroup->execute();
 					}
 
@@ -2277,24 +2317,29 @@ class Player extends Human implements CommandSender, InventoryHolder, IPlayer{
 		if($this->windows->contains($inventory)){
 			return $this->windows[$inventory];
 		}
-		if($forceId === null){
-			$this->windowCnt = $cnt = max(2, ++$this->windowCnt % 99);
-		}else{
-			$cnt = (int) $forceId;
-		}
-		$this->windowIndex[$cnt] = $inventory;
-		$this->windows->attach($inventory, $cnt);
-		$inventory->onOpen($this);
 
-		return $cnt;
+		if($forceId === 0 or $inventory->open($this)){
+			if($forceId === null){
+				$this->windowCnt = $cnt = max(2, ++$this->windowCnt % 99);
+			}else{
+				$cnt = (int) $forceId;
+			}
+			$this->windowIndex[$cnt] = $inventory;
+			$this->windows->attach($inventory, $cnt);
+			return $cnt;
+		}else{
+			return -1;
+		}
+
+
 	}
 
 	public function removeWindow(Inventory $inventory){
-		$inventory->onClose($this);
+		$inventory->close($this);
 		if($this->windows->contains($inventory)){
-			$inventory->onClose($this);
 			$id = $this->windows[$inventory];
 			unset($this->windowIndex[$id]);
+			$this->windows->detach($this->windows[$inventory]);
 		}
 	}
 
diff --git a/src/pocketmine/event/inventory/InventoryOpenEvent.php b/src/pocketmine/event/inventory/InventoryOpenEvent.php
new file mode 100644
index 000000000..1a1684e18
--- /dev/null
+++ b/src/pocketmine/event/inventory/InventoryOpenEvent.php
@@ -0,0 +1,52 @@
+<?php
+
+/**
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link   http://www.pocketmine.net/
+ *
+ *
+ */
+
+namespace pocketmine\event\inventory;
+use pocketmine\event\Cancellable;
+use pocketmine\inventory\Inventory;
+use pocketmine\Player;
+
+/**
+ * Called when a entity is despawned
+ */
+class InventoryOpenEvent extends InventoryEvent implements Cancellable{
+	public static $handlerList = null;
+
+	/** @var Player */
+	private $who;
+
+	/**
+	 * @param Inventory $inventory
+	 * @param Player    $who
+	 */
+	public function __construct(Inventory $inventory, Player $who){
+		$this->who = $who;
+		parent::__construct($inventory);
+	}
+
+	/**
+	 * @return Player
+	 */
+	public function getPlayer(){
+		return $this->who;
+	}
+
+}
\ No newline at end of file
diff --git a/src/pocketmine/event/inventory/InventoryPickupItemEvent.php b/src/pocketmine/event/inventory/InventoryPickupItemEvent.php
new file mode 100644
index 000000000..98fb54825
--- /dev/null
+++ b/src/pocketmine/event/inventory/InventoryPickupItemEvent.php
@@ -0,0 +1,52 @@
+<?php
+
+/**
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link   http://www.pocketmine.net/
+ *
+ *
+ */
+
+namespace pocketmine\event\inventory;
+use pocketmine\event\Cancellable;
+use pocketmine\inventory\Inventory;
+use pocketmine\item\Item;
+
+/**
+ * Called when a entity is despawned
+ */
+class InventoryPickupItemEvent extends InventoryEvent implements Cancellable{
+	public static $handlerList = null;
+
+	/** @var Item */
+	private $item;
+
+	/**
+	 * @param Inventory $inventory
+	 * @param Item      $item
+	 */
+	public function __construct(Inventory $inventory, Item $item){
+		$this->item = $item;
+		parent::__construct($inventory);
+	}
+
+	/**
+	 * @return Item
+	 */
+	public function getItem(){
+		return $this->item;
+	}
+
+}
\ No newline at end of file
diff --git a/src/pocketmine/inventory/BaseInventory.php b/src/pocketmine/inventory/BaseInventory.php
index dba3eb283..72b7f454d 100644
--- a/src/pocketmine/inventory/BaseInventory.php
+++ b/src/pocketmine/inventory/BaseInventory.php
@@ -23,6 +23,7 @@ namespace pocketmine\inventory;
 
 use pocketmine\entity\Entity;
 use pocketmine\event\entity\EntityInventoryChangeEvent;
+use pocketmine\event\inventory\InventoryOpenEvent;
 use pocketmine\item\Item;
 use pocketmine\network\protocol\ContainerSetContentPacket;
 use pocketmine\network\protocol\ContainerSetSlotPacket;
@@ -348,6 +349,19 @@ abstract class BaseInventory implements Inventory{
 		$this->setMaxStackSize($size);
 	}
 
+	public function open(Player $who){
+		$who->getServer()->getPluginManager()->callEvent($ev = new InventoryOpenEvent($this, $who));
+		if($ev->isCancelled()){
+			return false;
+		}
+		$this->onOpen($who);
+		return true;
+	}
+
+	public function close(Player $who){
+		$this->onClose($who);
+	}
+
 	public function onOpen(Player $who){
 		$this->viewers->attach($who);
 	}
diff --git a/src/pocketmine/inventory/Inventory.php b/src/pocketmine/inventory/Inventory.php
index c10c39238..6bc3421d9 100644
--- a/src/pocketmine/inventory/Inventory.php
+++ b/src/pocketmine/inventory/Inventory.php
@@ -194,6 +194,17 @@ interface Inventory{
 	 */
 	public function onOpen(Player $who);
 
+	/**
+	 * Tries to open the inventory to a player
+	 *
+	 * @param Player $who
+	 *
+	 * @return bool
+	 */
+	public function open(Player $who);
+
+	public function close(Player $who);
+
 	/**
 	 * @param Player $who
 	 */