001    package net.minecraft.src;
002    
003    public class ItemSign extends Item
004    {
005        public ItemSign(int par1)
006        {
007            super(par1);
008            this.maxStackSize = 16;
009            this.setCreativeTab(CreativeTabs.tabDecorations);
010        }
011    
012        /**
013         * Callback for item usage. If the item does something special on right clicking, he will have one of those. Return
014         * True if something happen and false if it don't. This is for ITEMS, not BLOCKS
015         */
016        public boolean onItemUse(ItemStack par1ItemStack, EntityPlayer par2EntityPlayer, World par3World, int par4, int par5, int par6, int par7, float par8, float par9, float par10)
017        {
018            if (par7 == 0)
019            {
020                return false;
021            }
022            else if (!par3World.getBlockMaterial(par4, par5, par6).isSolid())
023            {
024                return false;
025            }
026            else
027            {
028                if (par7 == 1)
029                {
030                    ++par5;
031                }
032    
033                if (par7 == 2)
034                {
035                    --par6;
036                }
037    
038                if (par7 == 3)
039                {
040                    ++par6;
041                }
042    
043                if (par7 == 4)
044                {
045                    --par4;
046                }
047    
048                if (par7 == 5)
049                {
050                    ++par4;
051                }
052    
053                if (!par2EntityPlayer.func_82247_a(par4, par5, par6, par7, par1ItemStack))
054                {
055                    return false;
056                }
057                else if (!Block.signPost.canPlaceBlockAt(par3World, par4, par5, par6))
058                {
059                    return false;
060                }
061                else
062                {
063                    if (par7 == 1)
064                    {
065                        int var11 = MathHelper.floor_double((double)((par2EntityPlayer.rotationYaw + 180.0F) * 16.0F / 360.0F) + 0.5D) & 15;
066                        par3World.setBlockAndMetadataWithNotify(par4, par5, par6, Block.signPost.blockID, var11);
067                    }
068                    else
069                    {
070                        par3World.setBlockAndMetadataWithNotify(par4, par5, par6, Block.signWall.blockID, par7);
071                    }
072    
073                    --par1ItemStack.stackSize;
074                    TileEntitySign var12 = (TileEntitySign)par3World.getBlockTileEntity(par4, par5, par6);
075    
076                    if (var12 != null)
077                    {
078                        par2EntityPlayer.displayGUIEditSign(var12);
079                    }
080    
081                    return true;
082                }
083            }
084        }
085    }