Question

I’m trying to use scala.swing package for my gui’s. Before that, I was using plain GroupLayout (was writing it by hand :), but scala way seems better. I ran into some problems though – I like BoxLayout, but when I try to add several panes into it, and try to specify different horisontal alignments, I get something strange.

Here is the code:

new Frame {
  contents = new BoxPanel(Orientation.Vertical) {
    contents += new Button("A") {
      xLayoutAlignment = 1.0f
    }
    contents += new Button("B")
    size = (200, 200)
  }
  size = (200, 200)
  visible = true
  peer.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE)
}

At the very least, I expected to see button B to the left of the button A. Here is what I saw:

Java version of this code does exactly the same, so it is not scala.swing bug.

What am I doing wrong?

Answer 1

and try to specify different horisontal alignments, I get something strange.

It’s the way BoxLayout was designed to work.

See Fixing Alignment Problems for a better explanation and a simple demo that allows you to play with alignments to better understand how they work.