java.lang.Object
javax.swing.text.LayeredHighlighter
javax.swing.text.DefaultHighlighter
- All Implemented Interfaces:
Highlighter
- Direct Known Subclasses:
BasicTextUI.BasicHighlighter
Implements the Highlighter interfaces. Implements a simple highlight
painter that renders in a solid color.
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Nested Class Summary
Modifier and TypeClassDescriptionstatic class
Simple highlight painter that fills a highlighted area with a solid color.Nested classes/interfaces declared in class javax.swing.text.LayeredHighlighter
LayeredHighlighter.LayerPainter
Nested classes/interfaces declared in interface javax.swing.text.Highlighter
Highlighter.Highlight, Highlighter.HighlightPainter
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Field Summary
Modifier and TypeFieldDescriptionstatic final LayeredHighlighter.LayerPainter
Default implementation of LayeredHighlighter.LayerPainter that can be used for painting highlights. -
Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionaddHighlight
(int p0, int p1, Highlighter.HighlightPainter p) Adds a highlight to the view.void
changeHighlight
(Object tag, int p0, int p1) Changes a highlight.void
Called when the UI is being removed from the interface of a JTextComponent.boolean
Return the draw layered highlights.Makes a copy of the highlights.void
Called when the UI is being installed into the interface of a JTextComponent.void
Renders the highlights.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.void
Removes all highlights.void
removeHighlight
(Object tag) Removes a highlight from the view.void
setDrawsLayeredHighlights
(boolean newValue) If true, highlights are drawn as the Views draw the text.
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Field Details
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DefaultPainter
Default implementation of LayeredHighlighter.LayerPainter that can be used for painting highlights.As of 1.4 this field is final.
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Constructor Details
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DefaultHighlighter
public DefaultHighlighter()Creates a new DefaultHighlighter object.
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Method Details
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paint
Renders the highlights.- Parameters:
g
- the graphics context
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install
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:
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deinstall
Called when the UI is being removed from the interface of a JTextComponent.- Parameters:
c
- the component- See Also:
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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 >= 0p1
- the end offset of the range to highlight >= p0p
- 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
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removeHighlight
Removes a highlight from the view.- Parameters:
tag
- the reference to the highlight
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removeAllHighlights
public void removeAllHighlights()Removes all highlights. -
changeHighlight
Changes a highlight.- Parameters:
tag
- the highlight tagp0
- the beginning of the range >= 0p1
- the end of the range >= p0- Throws:
BadLocationException
- if the specified location is invalid
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getHighlights
Makes a copy of the highlights. Does not actually clone each highlight, but only makes references to them.- Returns:
- the copy
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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 drawp0
- starting offset of viewp1
- ending offset of viewviewBounds
- Bounds of Vieweditor
- JTextComponentview
- View instance being rendered
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setDrawsLayeredHighlights
public void setDrawsLayeredHighlights(boolean newValue) If true, highlights are drawn as the Views draw the text. That is the Views will call intopaintLayeredHighlight
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.- Parameters:
newValue
- the new value
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getDrawsLayeredHighlights
public boolean getDrawsLayeredHighlights()Return the draw layered highlights.- Returns:
- the draw layered highlights
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