public LabelView(Element elem) 
{
        super(elem);
}

Constructs a new view wrapped on an element.

Parameters:

elem - the element

 public  void changedUpdate(DocumentEvent e,
    Shape a,
    ViewFactory f) 
{
        font = null;
        super.changedUpdate(e, a, f);
}

Gives notification from the document that attributes were changed in a location that this view is responsible for.

 public Color getBackground() 
{
        sync();
        return bg;
}

Fetches the background color to use to render the glyphs. This is implemented to return a cached background color, which defaults to null.

 public Font getFont() 
{
        sync();
        return font;
}

Fetches the font that the glyphs should be based upon. This is implemented to return a cached font.

 protected FontMetrics getFontMetrics() 
{
        sync();
        Container c = getContainer();
        return (c != null) ? c.getFontMetrics(font) :
            Toolkit.getDefaultToolkit().getFontMetrics(font);
}

Fetches the FontMetrics used for this view.

 public Color getForeground() 
{
        sync();
        return fg;
}

Fetches the foreground color to use to render the glyphs. This is implemented to return a cached foreground color, which defaults to null.

 public boolean isStrikeThrough() 
{
        sync();
        return strike;
}

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.

 public boolean isSubscript() 
{
        sync();
        return subscript;
}

Determines if the glyphs should be rendered as superscript.

 public boolean isSuperscript() 
{
        sync();
        return superscript;
}

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.

 public boolean isUnderline() 
{
        sync();
        return underline;
}

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.

 protected  void setBackground(Color bg) 
{
        this.bg = 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.

 protected  void setPropertiesFromAttributes() 
{
        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");
            }
        }
}

Sets the cached properties from the attributes.

 protected  void setStrikeThrough(boolean s) 
{
        strike = 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.

 protected  void setSubscript(boolean s) 
{
        subscript = 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.

 protected  void setSuperscript(boolean s) 
{
        superscript = 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.

 protected  void setUnderline(boolean u) 
{
        underline = 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.

 final  void sync() 
{
        if (font == null) {
            setPropertiesFromAttributes();
        }
}

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.