ruby - Ruby 中的 GTK FileChooserDialog 不会关闭窗口

Question

当我在 bash 终端(Ubuntu 14.04、ruby 1.9.3)中运行以下 ruby​​ 代码时，folder_test 工作正常，但 my_test 表现出奇怪的行为:当我从中选择一个文件夹时，它不会关闭 gtk 对话框窗口书签并且焦点保留在对话窗口上而不是返回到终端尽管已将所选文件夹正确报告给终端。出了什么问题以及如何强制关闭对话窗口？

# -*- encoding : utf-8 -*- 
#!/usr/bin/ruby

require 'gtk3'

def get_folder(folder)  
  a=''     
  Dir.chdir(File.expand_path(folder)) {
  dialog = Gtk::FileChooserDialog.new(
    :title => "Choose folder", :parent => nil, 
    :action => :select_folder, 
    :buttons => [[Gtk::Stock::OPEN, Gtk::ResponseType::ACCEPT], [Gtk::Stock::CANCEL, Gtk::ResponseType::CANCEL]])
  if dialog.run == Gtk::ResponseType::ACCEPT
    a=dialog.filename
  end
  dialog.destroy }
  return a 
end

def folder_test
  b=get_folder("/home")
  if b=="/home" 
    puts "No folder chosen"
    exit
  end
  puts "#{b} was choosen."
end

def my_test
  while true do
    folder_test
    puts "Another folder?(y/n)"
    answer=gets.chomp.downcase
    unless answer=='y'
      exit
    end
  end  
end

#folder_test
my_test

Answer 1

你可以在dialog.destroy之后使用下面的代码:

while Gtk.events_pending?
  Gtk.main_iteration
end 

例如:

  if dialog.run == Gtk::ResponseType::ACCEPT
    a=dialog.filename
  end
  dialog.destroy
  while Gtk.events_pending?
    Gtk.main_iteration
  end
  }
  return a
end

差异:

@@ -13,7 +13,11 @@ def get_folder(folder)
   if dialog.run == Gtk::ResponseType::ACCEPT
     a=dialog.filename
   end 
-  dialog.destroy }
+  dialog.destroy
+  while Gtk.events_pending?
+    Gtk.main_iteration
+  end 
+  }
   return a
 end