FocusTracking simply holds onto the last true focus it was given and continues to use it as the focus for the transformed layout until it sees another. It can be used to improve the behaviour of a child layout that has not been given the focused window, or equivalently, that of the layout itself when a float has focus.

Relevant issues:

• http://code.google.com/p/xmonad/issues/detail?id=4
• http://code.google.com/p/xmonad/issues/detail?id=306
• -------------------------------------------------------------------------------

To use the module, first import it:

import XMonad.Layout.FocusTracking

Then, a focus-dependent layout can be made to fall back on the last focus it saw, for example:

main = xmonad def
 { layoutHook = someParentLayoutWith aChild (focusTracking anotherChild)
 , ...
 }

Or in a simpler case:

main = xmonad def
 { layoutHook = myTiledLayout ||| focusTracking Full
 , ...
 }