NavigationFilterpublic class NavigationFilter extends Object 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 . |
Methods Summary |
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public int | getNextVisualPositionFrom(javax.swing.text.JTextComponent text, int pos, javax.swing.text.Position$Bias bias, int direction, javax.swing.text.Position$Bias[] biasRet)Returns the next visual position to place the caret at from an
existing position. The default implementation simply forwards the
method to the root View. Subclasses may wish to further restrict the
location based on additional criteria.
return text.getUI().getNextVisualPositionFrom(text, pos, bias,
direction, biasRet);
| public void | moveDot(javax.swing.text.NavigationFilter$FilterBypass fb, int dot, javax.swing.text.Position$Bias bias)Invoked prior to the Caret moving the dot. The default implementation
calls directly into the FilterBypass with the passed
in arguments. Subclasses may wish to conditionally
call super with a different location, or invoke the necessary
methods on the FilterBypass .
fb.moveDot(dot, bias);
| public void | setDot(javax.swing.text.NavigationFilter$FilterBypass fb, int dot, javax.swing.text.Position$Bias bias)Invoked prior to the Caret setting the dot. The default implementation
calls directly into the FilterBypass with the passed
in arguments. Subclasses may wish to conditionally
call super with a different location, or invoke the necessary method
on the FilterBypass
fb.setDot(dot, bias);
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