File	Doc	Category	Size	Date	Package
LabelView.java	API Doc	Java SE 5 API	8700	Fri Aug 26 14:58:16 BST 2005	javax.swing.text

LabelView

• java.lang.Object
  • javax.swing.text.View
    • javax.swing.text.GlyphView

Fields Summary
private Font	font
private Color	fg
private Color	bg
private boolean	underline
private boolean	strike
private boolean	superscript
private boolean	subscript

Constructors Summary
public LabelView(Element elem) Constructs a new view wrapped on an element. param elem the element super(elem);

Methods Summary
public void	changedUpdate(javax.swing.event.DocumentEvent e, java.awt.Shape a, javax.swing.text.ViewFactory f) Gives notification from the document that attributes were changed in a location that this view is responsible for. param e the change information from the associated document param a the current allocation of the view param f the factory to use to rebuild if the view has children see View#changedUpdate font = null; super.changedUpdate(e, a, f);
public java.awt.Color	getBackground() Fetches the background color to use to render the glyphs. This is implemented to return a cached background color, which defaults to null. return the cached background color sync(); return bg;
public java.awt.Font	getFont() Fetches the font that the glyphs should be based upon. This is implemented to return a cached font. return the cached font sync(); return font;
protected java.awt.FontMetrics	getFontMetrics() Fetches the FontMetrics used for this view. deprecated FontMetrics are not used for glyph rendering when running in the JDK. sync(); Container c = getContainer(); return (c != null) ? c.getFontMetrics(font) : Toolkit.getDefaultToolkit().getFontMetrics(font);
public java.awt.Color	getForeground() Fetches the foreground color to use to render the glyphs. This is implemented to return a cached foreground color, which defaults to null. return the cached foreground color sync(); return fg;
public boolean	isStrikeThrough() Determines if the glyphs should have a strikethrough line. If true, a line should be drawn through the center of the glyphs. This is implemented to return the cached strikeThrough property. When you request this property, LabelView re-syncs its state with the properties of the Element's AttributeSet. If Element's AttributeSet does not have this property set, it will revert to false. return the value of the cached strikeThrough property sync(); return strike;
public boolean	isSubscript() Determines if the glyphs should be rendered as superscript. return the value of the cached subscript property When you request this property, LabelView re-syncs its state with the properties of the Element's AttributeSet. If Element's AttributeSet does not have this property set, it will revert to false. return the value of the cached subscript property sync(); return subscript;
public boolean	isSuperscript() Determines if the glyphs should be rendered as subscript. When you request this property, LabelView re-syncs its state with the properties of the Element's AttributeSet. If Element's AttributeSet does not have this property set, it will revert to false. return the value of the cached superscript property sync(); return superscript;
public boolean	isUnderline() Determines if the glyphs should be underlined. If true, an underline should be drawn through the baseline. This is implemented to return the cached underline property. When you request this property, LabelView re-syncs its state with the properties of the Element's AttributeSet. If Element's AttributeSet does not have this property set, it will revert to false. return the value of the cached underline property sync(); return underline;
protected void	setBackground(java.awt.Color bg) Sets the background color for the view. This method is typically invoked as part of configuring this View. If you need to customize the background color you should override setPropertiesFromAttributes and invoke this method. A value of null indicates no background should be rendered, so that the background of the parent View will show through. param bg background color, or null see #setPropertiesFromAttributes since 1.5 this.bg = bg;
protected void	setPropertiesFromAttributes() Sets the cached properties from the attributes. AttributeSet attr = getAttributes(); if (attr != null) { Document d = getDocument(); if (d instanceof StyledDocument) { StyledDocument doc = (StyledDocument) d; font = doc.getFont(attr); fg = doc.getForeground(attr); if (attr.isDefined(StyleConstants.Background)) { bg = doc.getBackground(attr); } else { bg = null; } setUnderline(StyleConstants.isUnderline(attr)); setStrikeThrough(StyleConstants.isStrikeThrough(attr)); setSuperscript(StyleConstants.isSuperscript(attr)); setSubscript(StyleConstants.isSubscript(attr)); } else { throw new StateInvariantError("LabelView needs StyledDocument"); } }
protected void	setStrikeThrough(boolean s) Sets whether or not the view has a strike/line through it. Note that this setter is protected and is really only meant if you need to update some additional state when set. param s true if the view has a strike/line through it, otherwise false see #isStrikeThrough strike = s;
protected void	setSubscript(boolean s) Sets whether or not the view represents a subscript. Note that this setter is protected and is really only meant if you need to update some additional state when set. param s true if the view represents a subscript, otherwise false see #isSubscript subscript = s;
protected void	setSuperscript(boolean s) Sets whether or not the view represents a superscript. Note that this setter is protected and is really only meant if you need to update some additional state when set. param s true if the view represents a superscript, otherwise false see #isSuperscript superscript = s;
protected void	setUnderline(boolean u) Sets whether or not the view is underlined. Note that this setter is protected and is really only meant if you need to update some additional state when set. param u true if the view is underlined, otherwise false see #isUnderline underline = u;
final void	sync() Synchronize the view's cached values with the model. This causes the font, metrics, color, etc to be re-cached if the cache has been invalidated. if (font == null) { setPropertiesFromAttributes(); }