Java javax.swing.text Class DefaultHighlighter（JDK8）

Field Detail

• 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.

Constructor Detail

• DefaultHighlighter

  public DefaultHighlighter()

  Creates a new DefaultHighlighther object.

Method Detail

• 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 class LayeredHighlighter

  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()