I would like to be able to cancel the crafting event providing certain conditions have been met, however the event is not cancel-able.

Am I able to change this, if so how?

What else can I do to achieve the same thing, (close the gui before the resources are consumed for example) if so how?

 

Or is this only achievable by reflection/coremodding/ASM (which I am not %100 on what it is)

 

 

Can't you use the ItemCraftedEvent?

I just find it hard to believe that is all I could do.

How would I go about the coremod method?

I think it possible to cancel the mouse click when the crafting container is opened for the player.

The trickiest part would probably be to compute the mouse screen position and check against the result slot.

You can't prevent the recipe from being displayed without removing it entirely, though.

I think it possible to cancel the mouse click when the crafting container is opened for the player.

The trickiest part would probably be to compute the mouse screen position and check against the result slot.

You can't prevent the recipe from being displayed without removing it entirely, though.

Ultimately as long as the player doesn't get a hold of what they crafted I would be happy, if I could delete the item from their cursor then that would ultimately achieve the same thing but I don't know how those objects are treated (or even where to begin to figure it out)

Okay I managed to figure this out

@SubscribeEvent
    public void onPlayerOpenContainer(PlayerOpenContainerEvent event){
    	//System.out.println("open container :"+event.entityPlayer.openContainer.getClass().toString());

    	if (event.entityPlayer.openContainer.getClass().toString().equals("class net.minecraft.inventory.ContainerWorkbench")){
    		//System.out.println("");  
    		System.out.println(event.entityPlayer.openContainer.inventoryItemStacks.get(0));
    		if (event.entityPlayer.openContainer.inventoryItemStacks.get(0) != null){
    		event.entityPlayer.displayGUIWorkbench(0, 0, 0);
    		System.out.println("Blocking Crafting");
    		}
    		//}
    }

 

it is very messy but I hope someone can learn from this

Okay I managed to figure this out

@SubscribeEvent
    public void onPlayerOpenContainer(PlayerOpenContainerEvent event){
    	//System.out.println("open container :"+event.entityPlayer.openContainer.getClass().toString());

    	if (event.entityPlayer.openContainer.getClass().toString().equals("class net.minecraft.inventory.ContainerWorkbench")){
    		//System.out.println("");  
    		System.out.println(event.entityPlayer.openContainer.inventoryItemStacks.get(0));
    		if (event.entityPlayer.openContainer.inventoryItemStacks.get(0) != null){
    		event.entityPlayer.displayGUIWorkbench(0, 0, 0);
    		System.out.println("Blocking Crafting");
    		}
    		//}
    }

 

it is very messy but I hope someone can learn from this

 

event.entityPlayer.openContainer.getClass().toString().equals("class net.minecraft.inventory.ContainerWorkbench")

Use

container.getClass().equals(ContainerWorkbench.class)

instead of this mess. It checks if the class of the instance is the same as the class you've provided

event.entityPlayer.displayGUIWorkbench(0, 0, 0);

Use

event.entityPlayer.closeScreen();

as this is the proper way to close a GUI.

 

Also are you intending on removing the System.out.println's?