How to properly cancel TNT explosions?

I'm writing a plugin which is used to alter TNT behaviour into a "grenade" type, ie. where you throw or drop TNT and it explodes only from touching non-air blocks. But I'm at lost as to how to cancel TNT explosions to start with? Obviously, this does not seem to work:

Code:

public class eListener implements Listener {
  @EventHandler
  public void onIgniteTNT(BlockIgniteEvent event) {
 
    IgniteCause cause = event.getCause();
    // Listen only for the TNT ignited by the player
    if (!cause.equals(IgniteCause.FLINT_AND_STEEL)) return;
 
    Block block = event.getBlock();
    player = event.getPlayer();
   
    player.sendMessage(ChatColor.RED + "Trying to cancel ignition!");
    event.setCancelled(true);
  }
}

With the code, no message is sent to player and TNT explodes. So, quite obviously canceling BlockIgniteEvent is not enough.

 

Its not BlockIgniteEvent, as that doesn't work. It doesn't work because TNT, when ignited, becomes an entity, so to cancel it you have to do this.

Code:

@EventHandler
public void onEntityExplode(EntityExplodeEvent event)
//do whatever you need to do here :D

 

Try looking into this -
http://jd.bukkit.org/doxygen/d0/de9..._1event_1_1entity_1_1ExplosionPrimeEvent.html


Edit: EntityExplosionEvent seems like it would be better for what you are looking for

 

I think it is too!

 

To stop TNT explosions you should use the EntityExplodeEvent and check if the entity is a primed TNT (not a creeper) and cancel the event. Note: (Might help) The entity code for primed tnt is 20.

 

Thank y'all, I'll look into this. Funny thing, though, that TNT doesn't respond to BlockIgniteEvent, although you ignite it with flint and tinder. Sounds a bit weird to me.

 

It does, but you can't cancel the explosion from there, you can only cancel the igniting with the BlockIgniteEvent. Sounds good to me.

 

Yep because TNT "changes" block state from Block to entity you have to check that.

 

I understand, but then, wouldn't it be better to remove responding to BlockIgniteEvent totally from TNT - since it doesn't really do anything? I mean, I do cancel its ignition in my listener, but still it ignites (and then explodes).

 

Try this.
This code get all block damaged by TNT, and clear all damges. (Remove block from list). This code also damage the entitys.

Code:

@EventHandler(priority=EventPriority.NORMAL)
    public void explodeHeight(EntityExplodeEvent e) {
        if(e.getEntityType() == EntityType.PRIMED_TNT) {
            e.blockList().clear();
        }
    }

 

OR
You could cancel the explosion

Code:

@EventHandler
public void explodeEvent(EntityExplodeEvent event){
event.setcancelled(true);

 

Yes, I was able to cancel the explosion now. It still damages entities and loses the TNT though, so the solution is not what I need yet. I would need a way to prolong the "countdown" time indefinitely (until the TNT hits something), any ideas? Tampering with TNTPrimed's setFuseTicks() method?