- 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
Nested Classes Modifier and Type Interface Description static interface
Highlighter.Highlight
A highlight.static interface
Highlighter.HighlightPainter
Highlight renderer.
Method Summary
All Methods Instance Methods Abstract Methods 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 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 >= 0p1
- the end of the range >= p0p
- 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 changep0
- the beginning of the range >= 0p1
- 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