Remove element from the screen with direct dc calls.

Two ways to easily do that.

1) call Ui.requestUpdate() with a flag not to show this.  I'd actually use a flag to show it, clear the flag, and then call Ui.requestUpdate()

2) Redraw the same things but make them the background color.

about first option, could you give me code example?

i just don't know how to have reference to an object after dc.draw call

The Ui.requestUpdate() (maybe from a timer callback) results in onUpdate() being called, and there you have the dc.  So have a flag as to if the "popup" should be displayed and after is is displayed, using a timer, say after 5 seconds change the flag and call Ui.RequestUpdate().

Do you have a timer in your code?  You could just use that.

thanks, I understand the logic. I set flag on, show popup, then after some time I set flag off and have to remove this item from the screen.

My question is how to remove the element from the screen with dc call?
smth like dc.removeRectangle or dc.removeElement.

Typically, at the start of onUpdate() you set the background color and the do a dc.clear() so you are starting with a blank screen.

Ok, got it.

So after such "modification" on the screen you have to redraw whole ui.
isn't it not good in terms of memory and processor usage, to redraw all elements on ui?

I understand that there is no other way, just interesting how monkey vm handle this.