[Menu] Allow the game to switch between views

[TheoPannetier]

So far, the game runs either game_view, menu_view, or options_view, then exits. Eventually, we want to be able to switch back and forth between windows, with the Menu as a central hub:

It's time to try and think of how this can be implemented 🤔

[TheoPannetier]

Here's a proposition to implement this:

https://github.com/tresinformal/game/blob/f581d4651fa309ef6b99b8dcab42964b84ef1102/main.cpp#L159-L238

[TheoPannetier]

Probably solved after

• [x] #494
• [x] #495
• [x] #496

are solved. Probably.

[TheoPannetier]

It seems to work for default (i.e, running the game), but not when starting with the menu or options screens yet.

[TheoPannetier]

Ok, there's an issue with how variable next_view is handled by the switch. Seems like every case is matched, including the error one?

[TheoPannetier]

Progress: the while loop actually works as intended. The issue is that we declare all _view classes at once. The program creates one window for each of them, even if they're not used yet. But that's a different problem than the scope of this issue, so I'll close here :)