```with(LocalDensity.current) { window.minimumSize = Dimension(400.dp.roundToPx(), 250.dp.roundT...

# compose-desktop

[spierce7]

with(LocalDensity.current) {
    window.minimumSize = Dimension(400.dp.roundToPx(), 250.dp.roundToPx())
}

Is there a way to subscribe to the local density as state so that if it changes it triggers a re-draw?

[Dominaezzz]

Short answer is yes.

[Dominaezzz]

snapshotFlow { LocalDensity.current }.collectAsState() is one way but might not be the right one for you. It depends on what the re-draw code looks like.

[spierce7]

interesting

[spierce7]

snapshotFlow ’s lambda isn’t a @Composable , so that doesn’t work exactly.

[Dominaezzz]

Ah, I see. What does the re-draw look like? Is it a canvas?

[Albert Chang]

Your code will already recompose when the density changes as LocalDensity is a CompositionLocal.

[spierce7]

It doesn’t appear that it does.
i.e. here is what I’m doing:

with(LocalDensity.current) {
    window.minimumSize = Dimension(400.dp.roundToPx(), 250.dp.roundToPx())
}

The minimum sizes were drastically different when I was moving between my monitors.

[Albert Chang]

That means LocalDensity.current did change and isn't that what you want?

[Igor Demin]

JFrame (ComposeWindow) is already works with scaled pixels, and should automatically react to density changes.

You only need to set the minimum size at startup:

DisposableEffect(Unit) {
  window.minimumSize = Dimension(400, 250)
  onDispose {}
}