NavigationFilter
can be used to restrict where the cursor can be positioned. When the default cursor positioning actions attempt to reposition the cursor they will call into the
NavigationFilter
, assuming the
JTextComponent
has a non-null
NavigationFilter
set. In this manner the
NavigationFilter
can effectively restrict where the cursor can be positioned. Similarly
DefaultCaret
will call into the
NavigationFilter
when the user is changing the selection to further restrict where the cursor can be positioned.
Subclasses can conditionally call into supers implementation to restrict where the cursor can be placed, or call directly into the FilterBypass.
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