DefaultHighlighter
Class DefaultHighlighter
- java.lang.Object
-
- javax.swing.text.LayeredHighlighter
-
- javax.swing.text.DefaultHighlighter
- All Implemented Interfaces:
- Highlighter
- Direct Known Subclasses:
- BasicTextUI.BasicHighlighter
public class DefaultHighlighter extends LayeredHighlighter
Implements the Highlighter interfaces. Implements a simple highlight painter that renders in a solid color.
- See Also:
Highlighter
Nested Classes
Modifier and Type | Class and Description |
---|---|
static class |
DefaultHighlighter.DefaultHighlightPainter Simple highlight painter that fills a highlighted area with a solid color. |
Nested classes/interfaces inherited from class javax.swing.text.LayeredHighlighter
LayeredHighlighter.LayerPainter
Nested classes/interfaces inherited from interface javax.swing.text.Highlighter
Highlighter.Highlight, Highlighter.HighlightPainter
Fields
DefaultPainter
public static final LayeredHighlighter.LayerPainter DefaultPainter
Default implementation of LayeredHighlighter.LayerPainter that can be used for painting highlights.
As of 1.4 this field is final.
Constructors
DefaultHighlighter
public DefaultHighlighter()
Creates a new DefaultHighlighther object.
Methods
paint
public void paint(Graphics g)
Renders the highlights.
- Parameters:
-
g
- the graphics context
install
public void install(JTextComponent c)
Called when the UI is being installed into the interface of a JTextComponent. Installs the editor, and removes any existing highlights.
- Parameters:
-
c
- the editor component - See Also:
Highlighter.install(javax.swing.text.JTextComponent)
deinstall
public void deinstall(JTextComponent c)
Called when the UI is being removed from the interface of a JTextComponent.
- Parameters:
-
c
- the component - See Also:
Highlighter.deinstall(javax.swing.text.JTextComponent)
addHighlight
public 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 start offset of the range to highlight >= 0 -
p1
- the end offset of the range to highlight >= p0 -
p
- the painter to use to actually render the highlight - Returns:
- an object that can be used as a tag to refer to the highlight
- Throws:
-
BadLocationException
- if the specified location is invalid
removeHighlight
public void removeHighlight(Object tag)
Removes a highlight from the view.
- Parameters:
-
tag
- the reference to the highlight
removeAllHighlights
public void removeAllHighlights()
Removes all highlights.
changeHighlight
public void changeHighlight(Object tag, int p0, int p1) throws BadLocationException
Changes a highlight.
- Parameters:
-
tag
- the highlight tag -
p0
- the beginning of the range >= 0 -
p1
- the end of the range >= p0 - Throws:
-
BadLocationException
- if the specified location is invalid
getHighlights
public Highlighter.Highlight[] getHighlights()
Makes a copy of the highlights. Does not actually clone each highlight, but only makes references to them.
- Returns:
- the copy
- See Also:
Highlighter.getHighlights()
paintLayeredHighlights
public void paintLayeredHighlights(Graphics g, int p0, int p1, Shape viewBounds, JTextComponent editor, View view)
When leaf Views (such as LabelView) are rendering they should call into this method. If a highlight is in the given region it will be drawn immediately.
- Specified by:
-
paintLayeredHighlights
in classLayeredHighlighter
- Parameters:
-
g
- Graphics used to draw -
p0
- starting offset of view -
p1
- ending offset of view -
viewBounds
- Bounds of View -
editor
- JTextComponent -
view
- View instance being rendered
setDrawsLayeredHighlights
public void setDrawsLayeredHighlights(boolean newValue)
If true, highlights are drawn as the Views draw the text. That is the Views will call into paintLayeredHighlight
which will result in a rectangle being drawn before the text is drawn (if the offsets are in a highlighted region that is). For this to work the painter supplied must be an instance of LayeredHighlightPainter.
getDrawsLayeredHighlights
public boolean getDrawsLayeredHighlights()
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