Conditional Buttons?

[Nella102]

I was wondering if it was possible to have a conditional button in the main menu. So, for instance, if you finish chapter 1, it will remove the "start" button and will replace it with Start Chap. 2 or something similar. Whenever I try using an if statement using a variable named "Chapter2Start" it doesn't allow me to define the variable before the screen loads. How can I fix this? (Can I also make the Chapter 2 Button stay every time you open the game after that?)

[gas]

Use a persistent. and default.
Defaults are variables that are defined at the init phase, so they are here before the main menu is staged. anyway, persistent return None if not defined (so, no error anyway) and are preserved between launches.
Add this at the very beginning of your script, out of any label.

default persistent.finished_chapt_1 = False

At the end of chapter 1, use
$ persistent.finished_chapt_1 = True

In the main menu you can check the condition easily.

if persistent.finished_chapt_1:
# the chapter 1 button
else:
# the chapter 2 button