i'm making a block that has a gui with buttons and when i press 1 button i want it to check a few blocks and change them.

now i know how to write the code to check the blocks, and how to change them.

the problem i have is that i only know how to do that from inside another block, not from inside a gui, since in the gui i can't find how to ask for the coordinates of the block that has the gui.

so either i need a way for my gui to call a method inside the block, or a way to acces the gui block his coordinates, including what world it is in

 

and just for the record, i have already made a button within the gui, and i know what gui method is called when the button is pressed, so that's no problem

Do you use a GUI handler to return the instance of the GUI?

If yes, I think your GUI is returned in the method "getClientGuiElement", so you could just add in the constructor of your GUI, three int parameters that represents the x, y and z coordinates, and when you have to instantiate your GUI you can simply pass the coords to it.