Glimmer DSL for LibUI v0.5.14 has been released with the following changes:

• Basic Child Window example: a sample demonstrating how to spawn a child window from the main window
• Modify default window closing behavior to autodetect if the window is a child window (not the main window), and if closed, ensure that does not quit the app.
• Accept true and false as return values for on_closing window listener as aliases to 1 and 0

Basic Child Window Code

# From: https://github.com/AndyObtiva/glimmer-dsl-libui#basic-child-window

require 'glimmer-dsl-libui'

include Glimmer

window('Main Window') {
  button('Spawn Child Window') {
    on_clicked do
      window('Child Window') {
        on_closing do
          puts 'Child window is closing'
        end
      }.show
    end
  }

  on_closing do
    puts 'Main window is closing'
  end
}.show

Basic Child Window Screenshots

Happy Glimmering!