ask_for_location

# File ext/json/lib/json/editor.rb, line 1320
      def ask_for_location
        dialog = Dialog.new(
          "Load data from location...",
          nil, nil,
          [ Stock::OK, Dialog::RESPONSE_ACCEPT ],
          [ Stock::CANCEL, Dialog::RESPONSE_REJECT ]
        )
        hbox = HBox.new(false, 5)

        hbox.pack_start(Label.new("Location:"), false)
        hbox.pack_start(location_input = Entry.new)
        location_input.width_chars = 60
        location_input.text = @location || ''

        dialog.vbox.pack_start(hbox, false)

        dialog.signal_connect(:'key-press-event', &DEFAULT_DIALOG_KEY_PRESS_HANDLER)
        dialog.show_all
        dialog.run do |response| 
          if response == Dialog::RESPONSE_ACCEPT
            return @location = location_input.text
          end
        end
        return
      ensure
        dialog.destroy if dialog
      end