[1.8 - 1.13] guiAPI

This api also integrates a simplified to manage the size of the GUI. The values are :

InventorySizes.  LOW   (   9  slots  )  
InventorySizes.  MEDIUM   (   18  slots  )  
InventorySizes.  HIGH   (   27  slots  )  
InventorySizes.  LARGE   (   36  slots  )  
InventorySizes.  VERYLARGE   (   45  slots  )  
InventorySizes.  EXTREME   (   54  slots  )

Used to create ItemStack in a easy way. It's also an extension of the ItemStack class so you can put this instead of a "normal" ItemStack object.

Constructors :

GuiItem  (   int  slot,   String   name,   String   desc, Material mat  )  

GuiItem  (   int  slot,   String   name,  int  count,   String   desc, Material mat  )

slot : The slot place in the inventory.
name : The name of the item.
desc : The description of the item. Use \n to change the line (The class transforms automatically the String into an Array of strings).
count : The amount of item you want (1 by default).
mat : The material of the item

Create a normal GUI.

Constructor :

InventoryGUI(String title, InventorySizes size)

Methods :

addItem(GuiItem item) 

isInventoryOpened(Player p) 

build(Player p)

addItem : Adds an item into the GUI.
isInventoryOpened : Returns true if this gui is the current GUI showed to the player.
build : Shows the inventory to the player.

Create a scroll GUI.

Constructor :

scrollInventoryGUI(String title, InventorySizes size, Plugin plugin)

Methods :

addItem(GuiItem item) 

isInventoryOpened(Player p) 

build(Player p) 

setPageLabel(String pageLabel)

addItem : Adds an item into the GUI. The items are going to be showed in the order they were added. So the specified slot won't be considered for the GuiItem object.
isInventoryOpened : Returns true if this gui is the current GUI showed to the player.
build : Shows the inventory to the player.
setPageLabel : Changes the label before the pages numbers. ("Page" by default)

for   (  Player p  :  Bukkit.  getOnlinePlayers   (   )   )   {  
    InventoryGUI gui  =   new  InventoryGUI  (   "Test"  , InventorySizes.  LARGE   )   ;  
    gui.  addItem   (   new  GuiItem  (   0  ,  "Anvil"  ,  "Description"  , Material.  ANVIL   )   )   ;  
        
    gui.  build   (  p  )   ;  
 }

for   (  Player p  :  Bukkit.  getOnlinePlayers   (   )   )   {  
    scrollInventoryGUI scrollGUI  =   new  scrollInventoryGUI  (   "Scroll Inventory"  , InventorySizes.  LARGE  ,  this   )   ;  
            
     for   (   int  i  =   0   ;  i  <   30   ;  i  ++   )   {  
        scrollGUI.  addItem   (   new  GuiItem  (  i  +   1  ,  "Anvil n°"   +  i,  "A simple description"  , Material.  ANVIL   )   )   ;  
     }  
            
    scrollGUI.  build   (  p  )   ;  
 }