Java™ Platform
Standard Ed. 6

javax.swing.text
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
static interface Highlighter.Highlight
           
static interface Highlighter.HighlightPainter
          Highlight renderer.
 
Method Summary
 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 Detail

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

Java™ Platform
Standard Ed. 6

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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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