Alternative to get_element_value method for HtmlDialog

Developers Ruby API
, ,
2

Yes.

In the UI::HtmlDialog class, the add_action_callback() instance method will convert between Js and Ruby types automatically.

In the old UI::WebDialog class, your webpages could only send String data via a protocol handler.

The UI::HtmlDialog class does not use the protocol handler to send data to Ruby.

That said, you could still likely do it, thus defining a singleton method upon your HtmlDialog instance:

EDIT: Proven not to work! The UI::HtmlDialog class’ execute_script() method returns nil.

Non-working attempt ... 
@dlg.define_singleton_method(:get_element_value) {|id|
  self.execute_script("document.getElementById('#{id}').value")
}

Or, you can create your own subclass of UI::HtmlDialog, thus:

module Archetris
  class NiftyDialog < UI::HtmlDialog

    def get_element_value( id )
      self.execute_script(
        "document.getElementById('#{id}').value"
      )
    end

  end
end

EDIT: For a working example see …

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