That is nice to hear. I did not know this. Is there even more possible? Like joystick movement, cartridge inserted or if two players playing, a second controller shows up?
I just want to finish the package for Mr. Do and i am in the final steps.
None of this stuff is automatic... but it can all be done, there will just have to be a separate view for each game title. If you made cartridges for each game, to go along with the overlays, then we can easily add that in as part of the artwork for that game.
The animated buttons are easy; we just need a graphic for each state of the button (on and off). The controller itself would be the default off for all four buttons, then we would need a graphic for the button to look as it is pressed. And if everything is symmetrical and matching size, then we don't need four separate buttons for that, just one could cover all four.
A regular joystick can be manipulated in artwork, but only a 4-way digital at this time. Diagonals don't really work, as what you end up with is two buttons in the on state, so you see the joystick pressed in two directions at once. There is a "hacky" way to do it that I guy came out with on a YouTube channel, but it takes remapping some Player 2 keys to get the effect, so in the end, it still only works for one player.
As Vectrex is an analog stick, there is no way to simulate that (that I know of anyway).
Player 2 could be done, without needing to make two separate views for each game, by defining that layer as something different than the other layers in the artwork, so that it could simply be turned off in the MAME Video Options menu.