ask_for_hash_pair (JSONTreeView)

         # File lib/json/editor.rb, line 831
    831:       def ask_for_hash_pair(parent)
    832:         key_input = type_input = value_input = nil
    833:
    834:         dialog = Dialog.new("New (key, value) pair for Hash", nil, nil,
    835:           [ Stock::OK, Dialog::RESPONSE_ACCEPT ],
    836:           [ Stock::CANCEL, Dialog::RESPONSE_REJECT ]
    837:         )
    838:         dialog.width_request = 640
    839:
    840:         hbox = HBox.new(false, 5)
    841:         hbox.pack_start(Label.new("Key:"), false)
    842:         hbox.pack_start(key_input = Entry.new)
    843:         key_input.text = @key || ''
    844:         dialog.vbox.pack_start(hbox, false)
    845:         key_input.signal_connect(:activate) do
    846:           if parent.any? { |c| c.content == key_input.text }
    847:             toplevel.display_status('Key already exists in Hash!')
    848:             key_input.text = ''
    849:           else
    850:             toplevel.display_status('Key has been changed.')
    851:           end
    852:         end
    853:
    854:         hbox = HBox.new(false, 5)
    855:         hbox.pack_start(Label.new("Type:"), false)
    856:         hbox.pack_start(type_input = ComboBox.new(true))
    857:         ALL_TYPES.each { |t| type_input.append_text(t) }
    858:         type_input.active = @type || 0
    859:         dialog.vbox.pack_start(hbox, false)
    860:
    861:         type_input.signal_connect(:changed) do
    862:           value_input.editable = false
    863:           case ALL_TYPES[type_input.active]
    864:           when 'Array', 'Hash'
    865:             value_input.text = ''
    866:           when 'TrueClass'
    867:             value_input.text = 'true'
    868:           when 'FalseClass'
    869:             value_input.text = 'false'
    870:           when 'NilClass'
    871:             value_input.text = 'null'
    872:           else
    873:             value_input.text = ''
    874:             value_input.editable = true
    875:           end
    876:         end
    877:
    878:         hbox = HBox.new(false, 5)
    879:         hbox.pack_start(Label.new("Value:"), false)
    880:         hbox.pack_start(value_input = Entry.new)
    881:         value_input.width_chars = 60
    882:         value_input.text = @value || ''
    883:         dialog.vbox.pack_start(hbox, false)
    884:
    885:         dialog.signal_connect('key-press-event''key-press-event', &DEFAULT_DIALOG_KEY_PRESS_HANDLER)
    886:         dialog.show_all
    887:         self.focus = dialog
    888:         dialog.run do |response|
    889:           if response == Dialog::RESPONSE_ACCEPT
    890:             @key = key_input.text
    891:             type = ALL_TYPES[@type = type_input.active]
    892:             content = value_input.text
    893:             return @key, type, content
    894:           end
    895:         end
    896:         return
    897:       ensure
    898:         dialog.destroy
    899:       end