WindowState

isMinimized

DialogState

window.addWindowFocusListener(object : WindowFocusListener{
    override fun windowGainedFocus(e: WindowEvent?) {
        windowState.size = DpSize(size)
    }

    override fun windowLostFocus(e: WindowEvent?) {
        windowState.size = DpSize(0.dp, 0.dp)
    }
})