[clue-cert] Ruby-Gtk: Togglebuttons

[Dennis J Perkins]

#! /usr/bin/ruby

# This example shows how to use Gtk's togglebuttons.  Unlike a button,
# the togglebutton stays depressed when first pressed.  Pressing it
# again resets it.  This is useful for things like Gimp's palette, where
# the option remains set until another one is chosen.

# This example lets you choose any combination of the letters A, B, and
# C.  Clicking on GO shows the selections.

require "gtk2"

win = Gtk::Window.new "ToggleButton Example"
win.border_width = 10

win.set_default_size 150, 170

# We need a vertical box to store the widgets.
vbox = Gtk::VBox.new
win.add vbox

# We will use a label widget to show the choices.
$status = Gtk::Label.new
vbox.pack_start $status

# Add a separator to improve the appearance.  Since we will not
# reference the separator again, we can use HSeparator's constructor as
# the argument to pack_start.
vbox.pack_start(Gtk::HSeparator.new, true, true, 5) 

# Add some toggle buttons.
$t1 = Gtk::ToggleButton.new "A"
vbox.pack_start $t1

$t2 = Gtk::ToggleButton.new "B"
vbox.pack_start $t2

$t3 = Gtk::ToggleButton.new "C"
vbox.pack_start $t3

hsep = Gtk::HSeparator.new
vbox.pack_start(hsep, true, true, 5) 

b1 = Gtk::Button.new "Go"

# See which selections are active when the GO button is pressed.
b1.signal_connect("clicked") do
  text = ""
  text += "A" if $t1.active?
  text += "B" if $t2.active?
  text += "C" if $t3.active?
  
  # Write the result in $status.
  $status.text = text
end

vbox.pack_start b1

win.signal_connect("destroy") {
    Gtk.main_quit
}


win.show_all

Gtk.main