Event registered on EditorComponent for JComboBox will be cleared when new theme applied. about darklaf

[weisJ]

What listeners exactly are you installing?

[Gegenbauer]

All listeners will not work after ui changed, because the editorComponent you interact with was a new instance.

For example, add focus listener on ComboBoxDemo in darklaf

And after new theme applied, the focusListener will not work. I added new listener after theme changed as a work around, but it's not elegant.

[weisJ]

Applying existing listeners to the new component cannot be done easily as there are also several other listeners installed by swing itself, which cannot be discerned from user provided listeners. I see two possible options here:

• If you don't want the component to change provide your own ComboBoxEditor, which doesn't implement UIResource, which results in it being reinstalled after the laf changes. Any objects which are UIResources are allowed to be pulled away from you by the LaF at any point. Don't depend on them to preserve any state between LaF changes.
  Though I recommend the following:
• Any visual related listeners should be installed in JComponent#updateUI and be contained in a custom class. This ensures that they are installed after the LaF changes.