Question

I m creating a application with panes in Ruby/Gtk. When the panes are resized, I need to do some stuff. But I cannot figure out which signal to use. I think it is accept_position - but it don t seem to work. This is a sample app that illustrates my problem...

#!/usr/bin/env ruby

require  gtk2 

window = Gtk::Window.new(Gtk::Window::TOPLEVEL)
window.set_title  "Panes"
window.border_width = 10
window.set_size_request(225, 150)
window.signal_connect( destroy ) { Gtk.main_quit }
window.signal_connect( delete_event ) { false }

button1 = Gtk::Button.new("Resize")
button2 = Gtk::Button.new("Me")

button1.signal_connect( "clicked" ) { window.destroy }
button2.signal_connect( "clicked" ) { window.destroy }

paned = Gtk::VPaned.new
paned.add1(button1)
paned.add2(button2)

paned.signal_connect( "accept_position" ) { 
 puts "hello"
 false
}

window.add(paned)
window.show_all
Gtk.main

The accept_position call is never fired. Any idea what is causing this/how to fix it?

Answer 1

accept_position is a keybinding signal, only emitted when the pane is resized using the keyboard.

I don t know Ruby, but in C the signal you want is notify::position . notify is a GObject signal which fires whenever a property changes its value. If you add a detail, such as position, to the signal name when connecting it, then it only fires when that specific property changes its value.

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