Getting the animated object in `custom_exec_cb`

[kisvegabor]

@amirgon

var is passed as the first argument of exec_cb so you can obtain lv_anim_t from var, but not the btn itself.
This needs to be defined like this in order to register the Micropython callback on user_data , and to access it when the callback is called.

Ah, really. I should have figured it out.

@amirgon

Could you explain why your goal is to obtain btn1 from a? You can always access it from the lambda directly.

That’s correct. Seemingly I live too much n the C world

In case anyone needs it, here is an example:

def my_anim(target):
  anim = lv.anim_t()
  anim.init()
  anim.set_time(1000)
  anim.set_var(target)
  anim.set_values(0, 100)
  anim.set_custom_exec_cb(lambda a, v: target.set_x(v))
  lv.anim_t.start(anim)

my_anim(btn)

Thank you for your help!