Border

Places each child in the region that child names: the four edges and the center. An edge child keeps the thickness it prefers and spans its edge, and the center child takes whatever the edges leave.

A child names its region on its own modifier, through BorderPanelScope:

Panel(PanelLayout.Border()) {
    Toolbar(modifier = SwingModifier.north())
    Editor()
    StatusBar(modifier = SwingModifier.south())
}

A child that names no region occupies the center, so the panel's main content is written plainly.

A region hosts one child: dropping a child (e.g. behind an if) empties the region it occupied, and an edge no child names holds nothing.

See also