TabSheet: Switching between tabs combobox's disabled state is reset

[anasmi]

Description

Added disabled combobox to a tabsheet and navigated to another tab. Switched back to the first and combobx became enabled.

Expected outcome

Combobox keeps its disabled states when switching between tabs

Minimal reproducible example

      TabSheet tabSheet = new TabSheet();
      tabSheet.add("Fist tab", comboBox);
      tabSheet.add("Second tab", button);
      button.setEnabled(false);
      comboBox.setEnabled(false);

Steps to reproduce

1. Add snippet above into the code
2. Observe combobox is disabled
3. Click to the "Second tab"
4. Navigate back to the "First tab"
5. Combobox is enabled

Environment

Vaadin version(s): latest
OS: Windows

Browsers

Chrome, Firefox

[sissbruecker]

That behavior is intentional. TabSheet automatically disables the tab content component when a tab becomes inactive, and enables the content component when a tab becomes active again. For a more realistic use-case you would wrap your components into a layout component, in which case the disabled state of nested components would not be changed.

This auto-disabling behavior is currently not documented in the API docs, so that could be improved.