[desktop] SwingPanel not work with Snackbar

[xinkunZ]

1. Snackbar works with Text

            Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
                Box(modifier = Modifier.matchParentSize()) {
                    Text("aaaa")
                    Snackbar(
                        action = { Button(onClick = {}) {} },
                        modifier = Modifier.padding(8.dp).align(Alignment.BottomCenter)
                    ) { Text(text = "This is a snackbar!") }
                }
            }

2. not work with Swing JPanel

            Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
                Box(modifier = Modifier.matchParentSize()) {
                    SwingPanel(factory = {
                        JPanel().apply {
                            background = java.awt.Color.red
                        }
                    })
                    Snackbar(
                        action = { Button(onClick = {}) {} },
                        modifier = Modifier.padding(8.dp).align(Alignment.BottomCenter)
                    ) { Text(text = "This is a snackbar!") }
                }
            }

[elijah-semyonov]

Thanks for the report, we will look into it.

[alexzhirkevich]

SwingPanel is always on top of compose content. Just use snackbar inside of panel or use column and display it below panel
#2926

[xinkunZ]

@alexzhirkevich so the snackbar can only display below swingpanel but can not float on it?

[alexzhirkevich]

@xinkunZ You can have a ComposePanel with snackbar attached to your swing panel component, but i assume you have to manually manage its size and position

[MatkovIvan]

SwingPanel is always on top of compose content.

It's actually depend on platform 😕. It's always under Compose on macOS, but Compose uses those component bounds to clip the content.
JetBrains/compose-multiplatform-core#915 changes a way of drawing "the hole" in Compose so it won't affect overlapping elements anymore. I've added the code snippet that shared above to show how it behaves now.