So, after deep search into minecraft files I've come up with this :

public boolean onBlockActivated(World world, int x, int y, int z, EntityPlayer entityplayer, int X, float Y, float Z, float f){
	ItemStack itemstack = entityplayer.getCurrentEquippedItem();

			if(entityplayer.inventory.currentItem == 369){


			EntityItem entityitem = new EntityItem(world, x, y, z, new ItemStack(Items.blaze_powder, 4));
			entityitem.delayBeforeCanPickup = 10;
			world.spawnEntityInWorld(entityitem);
}
		return true;
}

but it doesn't work

i want to make so that on right click (with specific item) block drops other item...

i changed inside 'if' statement

if(entityplayer.inventory.hasItem(Items.blaze_rod)){

and it drops blaze powder, as expected, but you can get it from any inventory slot (you must have blaze rod in inventory somewhere) and it spawns two entities(one of them isn't pickable)

also doesn't consumes blaze rod...I don't want to use consumeinventoryitem method because of other items...

 

Any ideas?

To remove the ghost item, only spawn the EntityItem only on the server (

!world.isRemote

).

any ideas about right click?

				ItemStack itemstack = entityplayer.getCurrentEquippedItem();

			if(entityplayer.inventory.currentItem == 369){

 

So you're getting the current item stack....

 

And then doing nothing with it....

 

And instead, checking the current item versus an ID....

figured it out...

Now I just need (!world.isremote) and I'll make so it consumes an item  ~solved~

 

 

public boolean onBlockActivated(World world, int x, int y, int z, EntityPlayer entityplayer, int X, float Y, float Z, float f)
{
	if (entityplayer.getCurrentEquippedItem() != null && entityplayer.getCurrentEquippedItem().getItem() == Items.blaze_rod)
			{
					EntityItem entityitem = new EntityItem(world, x, y, z, new ItemStack(Items.blaze_powder, 4));
						entityitem.delayBeforeCanPickup = 5;
						world.spawnEntityInWorld(entityitem);

			}
			return true;
}