private void on_radio_cp_toggled(object o, EventArgs args)
{
cp_zoom_buttons_unsensitive();
if(radio_cp_other.Active)
entry_cp_other.Sensitive = true;
else {
entry_cp_other.Sensitive = false;
if(radio_cp1.Active)
button_zoom_cp1.Sensitive = true;
else if(radio_cp2.Active)
button_zoom_cp2.Sensitive = true;
else if(radio_cp3.Active)
button_zoom_cp3.Sensitive = true;
}
on_entries_required_changed(new object(), new EventArgs());
}