Class BasicTabbedPaneUI.FocusHandler

The purpose of this class is to implement a more flexible focus handling for the tabbed pane, which is used to determine whether the focus indicator should be painted or not. When in scrolling layout mode the area containing the tabs is a scrollpane, so simply testing whether the tabbed pane has the focus does not work.

The FocusHandler is installed on the scrollpane and the tabbed pane and sets the variable hasFocus to false only when both components do not hold the focus.

UNKNOWN: Apparently this class was intended to be protected, but was made public by a compiler bug and is now public for compatibility.