I have created my own world type, and when clicking Create New World --> More World Options I can pick my world type.

But I want to turn the bonus chest button ON for my world type by default.

I located the class GuiCreateWorld as the important one. But if I extend this class, I have no access to all the private attributes, and also cant override just everything 1:1 with copied attributes and methods, because I have no access to the super methods that get called.

I also cant copy the class and extend GuiScreen for being able to call the super methods. Because WorldTypes.onCustomizeButton() (which is called inside the GuiCreateWorld class) needs a GuiCreateWorld object.

 

Any ideas or even a different/preferable way of doing this?

 

Edit: And I have planned to use the GuiOpenEvent to replace the original GuiCreateWorld with my version. But I need the parent screen for it to work (to get back when pressing cancel). Which I cant access from the event... So this is another part where I could need some ideas.

Okay, I finally found a way to manipulate the bonus chest button:

I am extending the GuiCreateWorld class and use reflection (ReflectionHelper) to access the private variables and methods.

And to acess the parent screen in my EventHandler I just have to use Minecraft.getMinecraft().currentScreen