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Showing content from https://docs.oracle.com/en/java/javase/19/docs/api/java.desktop/java/awt/font/GraphicAttribute.html below:

GraphicAttribute (Java SE 19 & JDK 19)

Direct Known Subclasses:

ImageGraphicAttribute, ShapeGraphicAttribute

This class is used with the CHAR_REPLACEMENT attribute.

The GraphicAttribute class represents a graphic embedded in text. Clients subclass this class to implement their own char replacement graphics. Clients wishing to embed shapes and images in text need not subclass this class. Instead, clients can use the ShapeGraphicAttribute and ImageGraphicAttribute classes.

Subclasses must ensure that their objects are immutable once they are constructed. Mutating a GraphicAttribute that is used in a TextLayout results in undefined behavior from the TextLayout.

• Field Summary

  Fields

  static final int

  Aligns bottom of graphic to bottom of line.

  static final int

  Aligns origin of graphic to center baseline of line.

  static final int

  Aligns origin of graphic to hanging baseline of line.

  static final int

  Aligns origin of graphic to roman baseline of line.

  static final int

  Aligns top of graphic to top of line.

• Constructor Summary

  Constructors

  protected

  Constructs a GraphicAttribute.

• Method Summary

  abstract void

  Renders this GraphicAttribute at the specified location.

  abstract float

  Returns the advance of this GraphicAttribute.

  final int

  Returns the alignment of this GraphicAttribute.

  abstract float

  Returns the ascent of this GraphicAttribute.

  Returns a

  Rectangle2D

  that encloses all of the bits drawn by this

  GraphicAttribute

  relative to the rendering position.

  abstract float

  Returns the descent of this GraphicAttribute.

  Returns the justification information for this GraphicAttribute.

  Return a

  Shape

  that represents the region that this

  GraphicAttribute

  renders.

  Methods declared in class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Field Details
  • TOP_ALIGNMENT

    public static final int TOP_ALIGNMENT

    Aligns top of graphic to top of line.

    See Also:

    • Constant Field Values

  • BOTTOM_ALIGNMENT

    public static final int BOTTOM_ALIGNMENT

    Aligns bottom of graphic to bottom of line.

    See Also:

    • Constant Field Values

  • ROMAN_BASELINE

    public static final int ROMAN_BASELINE

    Aligns origin of graphic to roman baseline of line.

    See Also:

    • Constant Field Values

  • CENTER_BASELINE

    public static final int CENTER_BASELINE

    Aligns origin of graphic to center baseline of line.

    See Also:

    • Constant Field Values

  • HANGING_BASELINE

    public static final int HANGING_BASELINE

    Aligns origin of graphic to hanging baseline of line.

    See Also:

    • Constant Field Values

• Constructor Details
  • GraphicAttribute

    protected GraphicAttribute(int alignment)

    Constructs a GraphicAttribute. Subclasses use this to define the alignment of the graphic.

    Parameters:

    alignment - an int representing one of the GraphicAttribute alignment fields

    Throws:

    IllegalArgumentException - if alignment is not one of the five defined values.

• Method Details
  • getAscent

    public abstract float getAscent()

    Returns the ascent of this GraphicAttribute. A graphic can be rendered above its ascent.

    Returns:

    the ascent of this GraphicAttribute.

    See Also:

    • getBounds()

  • getDescent

    public abstract float getDescent()

    Returns the descent of this GraphicAttribute. A graphic can be rendered below its descent.

    Returns:

    the descent of this GraphicAttribute.

    See Also:

    • getBounds()

  • getAdvance

    public abstract float getAdvance()

    Returns the advance of this GraphicAttribute. The GraphicAttribute object's advance is the distance from the point at which the graphic is rendered and the point where the next character or graphic is rendered. A graphic can be rendered beyond its advance

    Returns:

    the advance of this GraphicAttribute.

    See Also:

    • getBounds()

  • getBounds

    Returns a

    Rectangle2D

    that encloses all of the bits drawn by this

    GraphicAttribute

    relative to the rendering position. A graphic may be rendered beyond its origin, ascent, descent, or advance; but if it is, this method's implementation must indicate where the graphic is rendered. Default bounds is the rectangle (0, -ascent, advance, ascent+descent).

    Returns:

    a Rectangle2D that encloses all of the bits rendered by this GraphicAttribute.

  • getOutline

    Return a

    Shape

    that represents the region that this

    GraphicAttribute

    renders. This is used when a

    TextLayout

    is requested to return the outline of the text. The (untransformed) shape must not extend outside the rectangular bounds returned by

    getBounds

    . The default implementation returns the rectangle returned by

    getBounds()

    , transformed by the provided

    AffineTransform

    if present.

    Parameters:

    tx - an optional AffineTransform to apply to the outline of this GraphicAttribute. This can be null.

    Returns:

    a Shape representing this graphic attribute, suitable for stroking or filling.

    Since:

    1.6

  • draw public abstract void draw(Graphics2D graphics, float x, float y)

    Renders this GraphicAttribute at the specified location.

    Parameters:

    graphics - the Graphics2D into which to render the graphic

    x - the user-space X coordinate where the graphic is rendered

    y - the user-space Y coordinate where the graphic is rendered

  • getAlignment

    public final int getAlignment()

    Returns the alignment of this GraphicAttribute. Alignment can be to a particular baseline, or to the absolute top or bottom of a line.

    Returns:

    the alignment of this GraphicAttribute.

  • getJustificationInfo

    Returns the justification information for this GraphicAttribute. Subclasses can override this method to provide different justification information.

    Returns:

    a GlyphJustificationInfo object that contains the justification information for this GraphicAttribute.

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