I've noticed that the new Window API in Compose for Desktop appears to break animations in my App :s...

# compose-desktop

[darkmoon_uk]

I've noticed that the new Window API in Compose for Desktop appears to break animations in my App 😱, or at least make them very flaky.
I have an AnimatedContent driven slide transition between master/detail views.
When starting the app with the old Window { <content> } function, it is reliable and silky smooth 👌.
Now when starting with application { Window { <content> } } the animation works maybe 1 in every 10 triggers. The content is all the same...
Is this a known issue; any likely causes? Using 1.0.0-alpha4-build344

[Igor Demin]

Will the problem disappear if you use this instead of the new Window API?

import androidx.compose.ui.awt.ComposeWindow
import java.awt.Dimension
import javax.swing.SwingUtilities

fun main() = SwingUtilities.invokeLater {
    ComposeWindow().apply {
        size = Dimension(500, 500)
        setContent {

        }
        isVisible = true
    }
}

If it will disappear then it is because of this issue (I am trying to fix it now)

[darkmoon_uk]

Yes, I started my App & same content using your provided snippet @Igor Demin; it is smooth 👍

[darkmoon_uk]

...and yes I am on Mac.

[darkmoon_uk]

Good to know, thanks for the quick reply, will await fix in a future build 🙂

[Igor Demin]

Thanks for the info 🙂 .

It is a very ugly bug and definitely will be fixed as soon as possible.
I just ran into some issues that prevented me to fix it quickly.