How to reset a table - scala

Question

It's possible to reset a table scala swing or remove it from the container after clicking on a button ?
I've tried to create a val with that table but I have always a new table stacked under the old
Here is the code :
// here is the most crucial part when the user click on the button, it will append a new table but if we want to start again, it will append bottom of the old one and I want here a kind of reset or removing of table
contents = new BoxPanel(Orientation.Vertical) {
contents += new Label("Hello, you're welcome")
contents += Button("Query") {
val query: ScrollPane = new ScrollPane(changeCountry())
contents -= query
Try {
contents += query
}.getOrElse(Dialog.showMessage(contents.head, "Incorrect input ! This seems that input isn't in that list, write a different code or country"))
}
// this part will ask to the user to write text to the input to display the table in function of the parameter of my function
def changeCountry(): Table = {
val text = Dialog.showInput(parent = contents.head, message = "Write a code of a country or a country", initial = "test")
text match {
case Some(s) => airportRunwayByCountry(s)
}
}
// this below part creates the table
def airportRunwayByCountry(code : String): Table = {
val headers = Seq("Airport","Runway linked")
val rowData = Functions.findAirportAndRunwayByCountry(code).map(x => x.productIterator.toArray).toArray
val tableAirportRunway = new Table(rowData,headers)
tableAirportRunway}
}

Answer 1

Solved with method "remove" of containers
Here is the code :
Try {
if(contents.length == 3 \\ number of items in my Box) {
\\ at this moment, only add the table because none other table exists
contents += new ScrollPane(changeCountry())
}
else {
contents -= contents.remove(3) \\get the id of the old table and remove it at this position
contents += new ScrollPane(changeCountry()) \\ at this moment, this content will have the id n°2, and the loop can start over without errors
}