eu.webtoolkit.jwt
Class WFontMetrics

java.lang.Object
  eu.webtoolkit.jwt.WFontMetrics

public class WFontMetrics
extends java.lang.Object

A value class that describes font metrics for a font.

This class provides font metrics for a given font. It is returned by an implementation of WPaintDevice#getFontMetrics(), and may differ between devices.

All methods return pixel dimensions.

See Also:

WPaintDevice

Constructor Summary

WFontMetrics(WFont font, double leading, double ascent, double descent)
Creates a font metrics information object.

Method Summary

double	getAscent() Returns the font ascent length.
double	getDescent() Returns the font descent length.
WFont	getFont() Returns the font for which these font metrics were computed.
double	getHeight() Returns the font height.
double	getLeading() Returns the font leading length.
double	getSize() Returns the font size.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WFontMetrics

public WFontMetrics(WFont font,
                    double leading,
                    double ascent,
                    double descent)

Creates a font metrics information object.

Method Detail

getFont

public WFont getFont()

Returns the font for which these font metrics were computed.

getSize

public double getSize()

Returns the font size.

This is the same as:

 font().size().sizeLength()
   
 

e.g.~for a font with size set to 16px, this returns 16.

getHeight

public double getHeight()

Returns the font height.

The font height is the total height of a text line. It is usually a bit bigger than the font size to have natural line spacing.

getLeading

public double getLeading()

Returns the font leading length.

This is vertical space provided on top of the ascent (empty space which serves as natural line spacing).

getAscent

public double getAscent()

Returns the font ascent length.

This is vertical space which corresponds to the maximum height of a character over the baseline (although many fonts violate this for some glyphs).

getDescent

public double getDescent()

Returns the font descent length.

This is vertical space which corresponds to the maximum height of a character under the baseline (although many fonts violate this for some glyphs).