W3cubDocs

Interface Highlighter

All Known Implementing Classes:: BasicTextUI.BasicHighlighter, DefaultHighlighter, LayeredHighlighter

public interface Highlighter

An interface for an object that allows one to mark up the background with colored areas.

Nested Class Summary

Modifier and Type	Interface	Description
`static interface`	`Highlighter.Highlight`	A highlight.
`static interface`	`Highlighter.HighlightPainter`	Highlight renderer.

Method Summary

Modifier and Type	Method	Description
`Object`	`addHighlight(int p0, int p1, Highlighter.HighlightPainter p)`	Adds a highlight to the view.
`void`	`changeHighlight(Object tag, int p0, int p1)`	Changes the given highlight to span a different portion of the document.
`void`	`deinstall(JTextComponent c)`	Called when the UI is being removed from the interface of a JTextComponent.
`Highlighter.Highlight[]`	`getHighlights()`	Fetches the current list of highlights.
`void`	`install(JTextComponent c)`	Called when the UI is being installed into the interface of a JTextComponent.
`void`	`paint(Graphics g)`	Renders the highlights.
`void`	`removeAllHighlights()`	Removes all highlights this highlighter is responsible for.
`void`	`removeHighlight(Object tag)`	Removes a highlight from the view.

Method Details

install

void install(JTextComponent c)

Called when the UI is being installed into the interface of a JTextComponent. This can be used to gain access to the model that is being navigated by the implementation of this interface.

Parameters:: c - the JTextComponent editor

deinstall

void deinstall(JTextComponent c)

Called when the UI is being removed from the interface of a JTextComponent. This is used to unregister any listeners that were attached.

Parameters:: c - the JTextComponent editor

paint

void paint(Graphics g)

Renders the highlights.

Parameters:: g - the graphics context.

addHighlight

Object addHighlight(int p0, int p1, Highlighter.HighlightPainter p) throws BadLocationException

Adds a highlight to the view. Returns a tag that can be used to refer to the highlight.

Parameters:: p0 - the beginning of the range >= 0; p1 - the end of the range >= p0; p - the painter to use for the actual highlighting
Returns:: an object that refers to the highlight
Throws:: BadLocationException - for an invalid range specification

removeHighlight

void removeHighlight(Object tag)

Removes a highlight from the view.

Parameters:: tag - which highlight to remove

removeAllHighlights

void removeAllHighlights()

Removes all highlights this highlighter is responsible for.

changeHighlight

void changeHighlight(Object tag, int p0, int p1) throws BadLocationException

Changes the given highlight to span a different portion of the document. This may be more efficient than a remove/add when a selection is expanding/shrinking (such as a sweep with a mouse) by damaging only what changed.

Parameters:: tag - which highlight to change; p0 - the beginning of the range >= 0; p1 - the end of the range >= p0
Throws:: BadLocationException - for an invalid range specification

getHighlights

Highlighter.Highlight[] getHighlights()

Fetches the current list of highlights.

Returns:: the highlight list

© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/swing/text/Highlighter.html