Applying a transition/animation to a screen on button press

[EJ107]

Hello! It's been a while since I've had to ask for help here, but I'm struggling to get something working.

Essentially I have a small custom menu on my game that allows the user to enter a "time-travel" mode, where an overlay appears on the screen and they can rewind the game by clicking on certain buttons. This uses image buttons buttons and Ren'py's rollback function.

It all works fine, but I want it to look a little nicer than just having the overlay appear instantly out of nowhere and the scenes instantly change when you click to go back. Having the overlay fade in and being able to use a transition on my rollback calls so that the scenes slide across film-reel style would look a lot nicer, but I can't work out how to apply animations or transitions to a particular screen outside of the script.

If anybody has any ideas or knows of somewhere that already covers this I'd be very grateful!

[PyTom]

You can use the With action. Something like:

[ Show("myscreen"), With(dissolve) ]

[EJ107]

Thank you for responding. The way my code currently works doesn't actually create any new screens but places the objects I need in existing screens, because I could never get my own screens to display correctly.

An example of what I could never get working is below:

Code: Select all

screen test_screen():
    hbox:
        imagebutton xalign 0.5 yalign 0.5:
             idle Transform(im.Alpha("ui/text_box.png", 0.85), size=(500, 500))                   

...

init -2 python:
    class ShowScreen(Action):
        def __call__(self):
            Show("test_screen")        

The ShowScreen action is assigned to a button and runs when it is pressed, but the screen never actually appears.

[PyTom]

If you want to create your own action that calls another action, you can do:

Code: Select all

init -2 python:
    class ShowScreen(Action):
        def __call__(self):
            renpy.run(Show("test_screen"))        

(It's probably better to just use Show directly, however.)

[EJ107]

Thanks a lot, I've got something that I'm pretty happy with now =)