Dropdown and DropdownButton and panel below

[Radoslaw Pujan]

Hello.
When you have an empty dropdown list then it is still shown on the screen as a small bar when I click Dropdown or Dropdown button.
Does anyone know how to hide it?
I want to do that because of 2 cases:
1. List may be empty, because user is not logged in so it shouldnt doesnt show the dropdown list.
2. For a Dropdown button I show my own panel as typical dropdownlist panel is too simple and I need to put some buttons and edit boxes there (Login panel)

So that is why I would need to hide those small empty dropdown panels if it is possible.
Anyone can help?

[Ohashi, Keisuke]

Hi.
Is it meens when user click dropdown, you need non shown popup?

If so you should add .disable css class to dropdown trigger.
the dropdown trigger can get by Dropdown#getTriggerWidget().