How do I go about preventing a block placement from happening on block activation? I currently have a block that has overridden onBlockActivated and it works as expected, however the block that is in the players hand is placed for a split second and then is removed, which then causes my itemstack to be decreased (I'm making the assumption that this is the default behavior of placing a block). I also looked at the EntityPlaceEvent and tried cancelling it, but I still got the same behavior. I would like to prevent that split second block placement and stack decrease.

Here is the onBlockActivated if it helps.

Spoiler

@Override
    public ActionResultType onBlockActivated(BlockState state, World worldIn, BlockPos pos,
        PlayerEntity player, Hand handIn, BlockRayTraceResult hit) {
        if (!worldIn.isRemote()) {
            ItemStack stack = player.getHeldItem(handIn);

            if (stack.isEmpty() && player.isSneaking()) {
                TileEntity tileEntity = worldIn.getTileEntity(pos);
                if (tileEntity instanceof SieveTile) {
                    SieveTile sieveTile = (SieveTile) tileEntity;
                    sieveTile.removeMesh(true);
                    return ActionResultType.SUCCESS;
                }
            }

            if (stack.getItem() instanceof MeshItem) {
                TileEntity tileEntity = worldIn.getTileEntity(pos);
                if (tileEntity instanceof SieveTile) {
                    SieveTile sieveTile = (SieveTile) tileEntity;
                    sieveTile.insertMesh(stack);
                    return ActionResultType.SUCCESS;
                }
            }

            if(stack.getItem() instanceof BlockItem) {
                BlockItem blockItem = (BlockItem)stack.getItem();
                if(SieveDrops.isBlockSiftable(blockItem.getBlock())) {
                    TileEntity tileEntity = worldIn.getTileEntity(pos);
                    if(tileEntity instanceof SieveTile) {
                        SieveTile sieveTile = (SieveTile)tileEntity;
                        sieveTile.insertSiftableBlock(stack);
                        return ActionResultType.SUCCESS;
                    }
                }
            }
        }
        return ActionResultType.PASS;
    }

 

 

In addition, I know that there are four ActionResultTypes, when exactly should each of those types be returned? I notice that I get a slightly different behavior based on which type I return.

Edited May 6, 20205 yr by Tikaji
Some more info on issue.

Return something other than PASS? Pass means "I didn't do anything."

Check the other values and return the obviously correct one.

I do return something other than PASS. PASS is the default return if none of the cases are met.

Ah, I see. Perfect. Thanks that did it.