Click can't run my class

Desktop Ruby-Gnome 2
1

there is simple class,it can run,i have tested it
class Myfile
def self.openit(myfile)
file=open(myfile,‘r’)
while line=file.gets
puts line
end
file.close
end
end
Myfile.openit("/home/pt/code")

when i add it into gtk ,it can’t work.
here is my program:
require ‘gtk2’
button = Gtk::Button.new(“my ruby”)
button.signal_connect(“clicked”) {
Myfile.openit("/home/pt/code")
}
window = Gtk::Window.new
window.signal_connect(“delete_event”) {
puts “delete event occurred”
false
}
window.signal_connect(“destroy”) {
puts “destroy event occurred”
Gtk.main_quit
}
window.border_width = 10
window.add(button)
window.show_all
Gtk.main

class Myfile
def self.openit(myfile)
file=open(myfile,‘r’)
while line=file.gets
puts line
end
file.close
end
end

the outout is:

pt@pt-laptop:~$ ruby /home/pt/t10.rb
/home/pt/t10.rb:4: uninitialized constant Myfile
from /home/pt/t10.rb:27:in call' from /home/pt/t10.rb:27:inmain’
from /home/pt/t10.rb:27
how to revise it?

2

Ruby code is executed as it is reached - and class definitions are ruby
code.

Your code is laid out in the form:

which means that the class ‘Myfile’ doesn’t get defined until the
program
has finished running.

To fix it, you’ll need to move the Myfile class to the top of the file
so
that the class gets defined before you try to use it.

HTH,

G.

3

i fixed it,it can run now.think you
class Myfile
def self.openit(myfile)
file=open(myfile,‘r’)
while line=file.gets
puts line
end
file.close
end
end
require ‘gtk2’
button = Gtk::Button.new(“my ruby”)
button.signal_connect(“clicked”) {
Myfile.openit("/home/pt/code")
}
window = Gtk::Window.new
window.signal_connect(“delete_event”) {
puts “delete event occurred”
false
}
window.signal_connect(“destroy”) {
puts “destroy event occurred”
Gtk.main_quit
}
window.border_width = 10
window.add(button)
window.show_all
Gtk.main