Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class TextAttribute - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.awt.font
Class TextAttribute

java.lang.Object
  |
  +--java.text.AttributedCharacterIterator.Attribute
        |
        +--java.awt.font.TextAttribute

public final class TextAttribute
extends AttributedCharacterIterator.Attribute

The TextAttribute class defines attribute keys and attribute values used for text rendering.

TextAttribute instances are used as attribute keys to identify attributes in AttributedCharacterIterator, Font, and other classes handling text attributes. Other constants defined in this class are used as attribute values.

For each text attribute, the documentation describes:

the type of their values,
the valid values if there are limitations
relevant constants
the default effect if the attribute is absent (or has a null value).
a description of the effect.
the fallback behavior if the exact attribute requested is not available.

Types of Values

The values of attributes must always be immutable.
Where a list of limitations is given, any value outside of that set is reserved for future use, and ignored at present.
If the value is null or not of the proper type then it has the default effect. The effect of a particular value can be interpolated, especially in the case of multiple master fonts. This interpolation is done based on the nearest defined constants above and below the request:

interpolation = (request - below)/(above - below);

Interpolation

Fonts should interpolate values in certain circumstances. For example, when the WEIGHT value is 2.13. If the nearest surrounding values in the font are WEIGHT_BOLD = 2.0 and WEIGHT_HEAVY = 2.25 then font would then interpret the WEIGHT request as being 52% of the way between what it considers BOLD and what it considers HEAVY. If the nearest surrounding values are WEIGHT_SEMIBOLD = 1.25 and WEIGHT_ULTRABOLD = 2.75 then the WEIGHT request is interpreted as being 58.67% of the way between SEMIBOLD and ULTRABOLD.
Where a font does not have enough capability to handle a given request, such as superscript, then it should simulate it to the best of its ability. To determine if simulation is being performed, the client should query the font to see what actual attributes were used.

See Also:: AttributedCharacterIterator, Font, Serialized Form

Field Summary

static TextAttribute BACKGROUND
          Attribute key for the background Paint adornment.

static TextAttribute BIDI_EMBEDDING
          Attribute key for the embedding level for nested bidirectional runs.

static TextAttribute CHAR_REPLACEMENT
          Attribute key for a user_defined glyph to display in the text in lieu of a character.

static TextAttribute FAMILY
          Attribute key for the unlocalized font family name.

static TextAttribute FONT
          Attribute key for the font to use to render text.

static TextAttribute FOREGROUND
          Attribute key for the foreground paint adornment.

static TextAttribute INPUT_METHOD_HIGHLIGHT
          Attribute key for input method highlight styles.

static TextAttribute JUSTIFICATION
          Attribute key for the justification of a paragraph.

static Float JUSTIFICATION_FULL
          Justify the line to the full requested width.

static Float JUSTIFICATION_NONE
          Do not allow the line to be justified.

static TextAttribute POSTURE
          Attribute key for the posture of a font.

static Float POSTURE_OBLIQUE
          The standard italic posture.

static Float POSTURE_REGULAR
          The standard posture, upright.

static TextAttribute RUN_DIRECTION
          Attribute key for the run direction of the line.

static Boolean RUN_DIRECTION_LTR
          Left-to-right run direction.

static Boolean RUN_DIRECTION_RTL
          Right-to-left run direction.

static TextAttribute SIZE
          Attribute key for the font size.

static TextAttribute STRIKETHROUGH
          Attribute key for the strikethrough adornment.

static Boolean STRIKETHROUGH_ON
          A single strikethrough.

static TextAttribute SUPERSCRIPT
          Attribute key for super and subscripting.

static Integer SUPERSCRIPT_SUB
          Standard subscript.

static Integer SUPERSCRIPT_SUPER
          Standard superscript.

static TextAttribute SWAP_COLORS
          Attribute key for swapping foreground and background Paints (or Colors).

static Boolean SWAP_COLORS_ON
          Swap foreground and background.

static TextAttribute TRANSFORM
          Attribute key for the transform of a font.

static TextAttribute UNDERLINE
          Attribute key for underline adornments.

static Integer UNDERLINE_ON
          Standard underline at the roman baseline for roman text, and below the decenders for other text.

static TextAttribute WEIGHT
          Attribute key for the weight of a font.

static Float WEIGHT_BOLD
          The standard bold weight.

static Float WEIGHT_DEMIBOLD
          A moderately lighter weight than BOLD.

static Float WEIGHT_DEMILIGHT
          An intermediate weight between LIGHT and STANDARD.

static Float WEIGHT_EXTRA_LIGHT
          The lightest predefined weight.

static Float WEIGHT_EXTRABOLD
          An extra heavy weight.

static Float WEIGHT_HEAVY
          A moderately heavier weight than BOLD.

static Float WEIGHT_LIGHT
          The standard light weight.

static Float WEIGHT_MEDIUM
          An intermediate weight between the REGULAR and BOLD weights.

static Float WEIGHT_REGULAR
          The standard weight.

static Float WEIGHT_SEMIBOLD
          A moderately heavier weight than REGULAR.

static Float WEIGHT_ULTRABOLD
          The heaviest predefined weight.

static TextAttribute WIDTH
          Attribute key for the width of a font.

static Float WIDTH_CONDENSED
          The most condensed predefined width.

static Float WIDTH_EXTENDED
          The most extended predefined width.

static Float WIDTH_REGULAR
          The standard width.

static Float WIDTH_SEMI_CONDENSED
          A moderately condensed width.

static Float WIDTH_SEMI_EXTENDED
          A moderately extended width.

Fields inherited from class java.text.AttributedCharacterIterator.Attribute

INPUT_METHOD_SEGMENT, LANGUAGE, READING

Constructor Summary

protected TextAttribute(String name)
          Constructs a TextAttribute with the specified name.

Method Summary

protected Object readResolve()
          Resolves instances being deserialized to the predefined constants.

Methods inherited from class java.text.AttributedCharacterIterator.Attribute

equals, getName, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

FAMILY

public static final TextAttribute FAMILY

Attribute key for the unlocalized font family name.

Key
FAMILY

Value
String

Constants
"Serif", "SansSerif"

Default
Host default;

Description
The name of the font family. If the family name is not found, the default font is used. The name should not be the full font name or specify other attributes (such as the name "Helvetica Bold"). Such names might result in the default font if the name does not match a known family name.

Key	FAMILY
Value	String
Constants	"Serif", "SansSerif"
Default	Host default;
Description	The name of the font family. If the family name is not found, the default font is used. The name should not be the full font name or specify other attributes (such as the name "Helvetica Bold"). Such names might result in the default font if the name does not match a known family name.

WEIGHT

public static final TextAttribute WEIGHT

Attribute key for the weight of a font.

Key
WEIGHT

Value
Float

Constants
WEIGHT_ULTRA_LIGHT = 0.25,
WEIGHT_EXTRA_LIGHT = 0.5,
WEIGHT_LIGHT = 0.75,
WEIGHT_DEMILIGHT = 0.875,
WEIGHT_REGULAR = 1.0,
WEIGHT_SEMIBOLD = 1.25,
WEIGHT_MEDIUM = 1.5,
WEIGHT_DEMIBOLD = 1.75,
WEIGHT_BOLD = 2.0,
WEIGHT_HEAVY = 2.25,
WEIGHT_EXTRABOLD = 2.5,
WEIGHT_ULTRABOLD = 2.75

Default
WEIGHT_REGULAR

Description
The value is roughly the ratio of the stem width to that of the regular weight. If the font has a different value for specific constants, then the value is interpolated as described in the class description.

Fallback
Currently none. However, in the future, shape manipulations might be
available to simulate weight variations for fonts that don't have them.

Key	WEIGHT
Value	Float
Constants	WEIGHT_ULTRA_LIGHT = 0.25, WEIGHT_EXTRA_LIGHT = 0.5, WEIGHT_LIGHT = 0.75, WEIGHT_DEMILIGHT = 0.875, WEIGHT_REGULAR = 1.0, WEIGHT_SEMIBOLD = 1.25, WEIGHT_MEDIUM = 1.5, WEIGHT_DEMIBOLD = 1.75, WEIGHT_BOLD = 2.0, WEIGHT_HEAVY = 2.25, WEIGHT_EXTRABOLD = 2.5, WEIGHT_ULTRABOLD = 2.75
Default	WEIGHT_REGULAR
Description	The value is roughly the ratio of the stem width to that of the regular weight. If the font has a different value for specific constants, then the value is interpolated as described in the class description.
Fallback	Currently none. However, in the future, shape manipulations might be available to simulate weight variations for fonts that don't have them.

WEIGHT_EXTRA_LIGHT

public static final Float WEIGHT_EXTRA_LIGHT

The lightest predefined weight.

See Also:: WEIGHT

WEIGHT_LIGHT

public static final Float WEIGHT_LIGHT

The standard light weight.

See Also:: WEIGHT

WEIGHT_DEMILIGHT

public static final Float WEIGHT_DEMILIGHT

An intermediate weight between LIGHT and STANDARD.

See Also:: WEIGHT

WEIGHT_REGULAR

public static final Float WEIGHT_REGULAR

The standard weight. This weight is used if WEIGHT is unspecified.

See Also:: WEIGHT

WEIGHT_SEMIBOLD

public static final Float WEIGHT_SEMIBOLD

A moderately heavier weight than REGULAR.

See Also:: WEIGHT

WEIGHT_MEDIUM

public static final Float WEIGHT_MEDIUM

An intermediate weight between the REGULAR and BOLD weights.

See Also:: WEIGHT

WEIGHT_DEMIBOLD

public static final Float WEIGHT_DEMIBOLD

A moderately lighter weight than BOLD.

See Also:: WEIGHT

WEIGHT_BOLD

public static final Float WEIGHT_BOLD

The standard bold weight.

See Also:: WEIGHT

WEIGHT_HEAVY

public static final Float WEIGHT_HEAVY

A moderately heavier weight than BOLD.

See Also:: WEIGHT

WEIGHT_EXTRABOLD

public static final Float WEIGHT_EXTRABOLD

An extra heavy weight.

See Also:: WEIGHT

WEIGHT_ULTRABOLD

public static final Float WEIGHT_ULTRABOLD

The heaviest predefined weight.

See Also:: WEIGHT

WIDTH

public static final TextAttribute WIDTH

Attribute key for the width of a font.

Key
WIDTH

Value
Float

Constants
WIDTH_CONDENSED = 0.75,
WIDTH_SEMI_CONDENSED = 0.875,
WIDTH_REGULAR = 1.0,
WIDTH_SEMI_EXTENDED = 1.25,
WIDTH_EXTENDED = 1.5

Default
WIDTH_REGULAR

Description
The value is roughly the ratio of the advance width to that of the regular width. If the font has a different value for specific constants, then the value is interpolated as described in the class description.

Fallback
If a Narrow font is available and matches, use that. Otherwise scale with a transform based on the value.

Key	WIDTH
Value	Float
Constants	WIDTH_CONDENSED = 0.75, WIDTH_SEMI_CONDENSED = 0.875, WIDTH_REGULAR = 1.0, WIDTH_SEMI_EXTENDED = 1.25, WIDTH_EXTENDED = 1.5
Default	WIDTH_REGULAR
Description	The value is roughly the ratio of the advance width to that of the regular width. If the font has a different value for specific constants, then the value is interpolated as described in the class description.
Fallback	If a Narrow font is available and matches, use that. Otherwise scale with a transform based on the value.

WIDTH_CONDENSED

public static final Float WIDTH_CONDENSED

The most condensed predefined width.

See Also:: WIDTH

WIDTH_SEMI_CONDENSED

public static final Float WIDTH_SEMI_CONDENSED

A moderately condensed width.

See Also:: WIDTH

WIDTH_REGULAR

public static final Float WIDTH_REGULAR

The standard width. This width is used if WIDTH is unspecified.

See Also:: WIDTH

WIDTH_SEMI_EXTENDED

public static final Float WIDTH_SEMI_EXTENDED

A moderately extended width.

See Also:: WIDTH

WIDTH_EXTENDED

public static final Float WIDTH_EXTENDED

The most extended predefined width.

See Also:: WIDTH

POSTURE

public static final TextAttribute POSTURE

Attribute key for the posture of a font.

Key
POSTURE

Value
Float

Constants
POSTURE_REGULAR = 0,
POSTURE_OBLIQUE = 0.20

Default
POSTURE_REGULAR

Description
The value is interpreted generally as a skew slope, positive leans to the right. If the font has a different value for specific constants, then the value is interpolated as described in the class description. With fonts that have italic faces, not only the skew of the character changes, but also the letter shapes might change.
Notes:
To set the value by angle, use:
value = new Float(Math.tan(Math.PI*degrees/180.0)
To determine the angle from the value, use:
angle = Math.atan(value.floatValue())*180/Math.PI

Fallback
If an Oblique font is available and matches, use that. Otherwise skew with a transform using the posture value interpreted as run/rise.

Key	POSTURE
Value	Float
Constants	POSTURE_REGULAR = 0, POSTURE_OBLIQUE = 0.20
Default	POSTURE_REGULAR
Description	The value is interpreted generally as a skew slope, positive leans to the right. If the font has a different value for specific constants, then the value is interpolated as described in the class description. With fonts that have italic faces, not only the skew of the character changes, but also the letter shapes might change. Notes: To set the value by angle, use: `value = new Float(Math.tan(Math.PIdegrees/180.0)` To determine the angle from the value, use: `angle = Math.atan(value.floatValue())180/Math.PI`
Fallback	If an Oblique font is available and matches, use that. Otherwise skew with a transform using the posture value interpreted as run/rise.

See Also:: Font.getItalicAngle()

POSTURE_REGULAR

public static final Float POSTURE_REGULAR

The standard posture, upright.

See Also:: POSTURE

POSTURE_OBLIQUE

public static final Float POSTURE_OBLIQUE

The standard italic posture.

See Also:: POSTURE

SIZE

public static final TextAttribute SIZE

Attribute key for the font size.

Key
SIZE

Value
Float

Default
from System Properties

Description
Represents point size. Note that the appearance and metrics of a 12pt font with a 2X transform might be different than that of a 24 point font with no transform.

Fallback
Scale to provided size.

Key	SIZE
Value	Float
Default	from System Properties
Description	Represents point size. Note that the appearance and metrics of a 12pt font with a 2X transform might be different than that of a 24 point font with no transform.
Fallback	Scale to provided size.

TRANSFORM

public static final TextAttribute TRANSFORM

Attribute key for the transform of a font.

Key
TRANSFORM

Value
TransformAttribute

Default
Identity transform

Description

Used to transform glyphs rendered by this font. The primary intent is to support scaling, skewing, and translation. In general, large rotations do not produce very useful results. The transform modifies both the glyph and the advance. The translations in the transform are interpreted as a ratio of the point size. That is, with a point size of 12, a translation of 0.5 results in a movement of 6 points.
The advance point of the transformed glyph is the transform of the advance point projected onto the baseline. If the advance ends up to the left (top) of the glyph origin, the two points are swapped.

Example one: The point size is 20, the original advance is 10.0, and the transform is a 60 degree counterclockwise rotation plus an offset up and to the right of 0.1, -0.1. The translation results in an offset of <2.0, -2.0>. The original advance point is <10.0, 0.0>; after the rotation it is <6.0, -8.0>; when adding the offset this becomes <8.0,-10.0>, when projecting on the (horizontal) baseline this becomes the new advance point: <8.0, 0.0>. The advance width is the distance from the origin to the advance point: 8.0. The rotated glyph is rendered two points up and to the right of its origin and rotated. This does not affect the baseline for subsequent glyphs.

Key	TRANSFORM
Value	TransformAttribute
Default	Identity transform
Description	Used to transform glyphs rendered by this font. The primary intent is to support scaling, skewing, and translation. In general, large rotations do not produce very useful results. The transform modifies both the glyph and the advance. The translations in the transform are interpreted as a ratio of the point size. That is, with a point size of 12, a translation of 0.5 results in a movement of 6 points. The advance point of the transformed glyph is the transform of the advance point projected onto the baseline. If the advance ends up to the left (top) of the glyph origin, the two points are swapped. Example one: The point size is 20, the original advance is 10.0, and the transform is a 60 degree counterclockwise rotation plus an offset up and to the right of 0.1, -0.1. The translation results in an offset of <2.0, -2.0>. The original advance point is <10.0, 0.0>; after the rotation it is <6.0, -8.0>; when adding the offset this becomes <8.0,-10.0>, when projecting on the (horizontal) baseline this becomes the new advance point: <8.0, 0.0>. The advance width is the distance from the origin to the advance point: 8.0. The rotated glyph is rendered two points up and to the right of its origin and rotated. This does not affect the baseline for subsequent glyphs.

SUPERSCRIPT

public static final TextAttribute SUPERSCRIPT

Attribute key for super and subscripting.

Key
SUPERSCRIPT

Value
Integer

Constants
SUPERSCRIPT_NONE = 0,
SUPERSCRIPT_SUPER = 1,
SUPERSCRIPT_SUB = -1

Default
SUPERSCRIPT_NONE

Description
Requests that the font display the characters with glyphs at a particular superscript level: 0 = none, 1 = superscript, 2 = superscript of superscript,...-1 = subscript, -2 = subscript of subscript,... Requests that the font display text using default superscript (or subscript) glyphs and/or scaling.

Fallback
Use transform with translation of +/-1/2 and scale of 2/3, progressively for each level. That is, for the transform at level N (with N != 0):
offset = sign(N)*1/2*(2/3)^(abs(N)-1) scale = (2/3)^abs(N)

Key	SUPERSCRIPT
Value	Integer
Constants	SUPERSCRIPT_NONE = 0, SUPERSCRIPT_SUPER = 1, SUPERSCRIPT_SUB = -1
Default	SUPERSCRIPT_NONE
Description	Requests that the font display the characters with glyphs at a particular superscript level: 0 = none, 1 = superscript, 2 = superscript of superscript,...-1 = subscript, -2 = subscript of subscript,... Requests that the font display text using default superscript (or subscript) glyphs and/or scaling.
Fallback	Use transform with translation of +/-1/2 and scale of 2/3, progressively for each level. That is, for the transform at level N (with N != 0): `offset = sign(N)1/2(2/3)^(abs(N)-1) scale = (2/3)^abs(N)`

SUPERSCRIPT_SUPER

public static final Integer SUPERSCRIPT_SUPER

Standard superscript.

See Also:: SUPERSCRIPT

SUPERSCRIPT_SUB

public static final Integer SUPERSCRIPT_SUB

Standard subscript.

See Also:: SUPERSCRIPT

FONT

public static final TextAttribute FONT

Attribute key for the font to use to render text.

Key
FONT

Value
Font

Default
None, perform default resolution

Description
A way for users to override the resolution of font attributes into a Font, or force use of a particular Font instance. This also allows users to specify subclasses of Font in cases where a Font can be subclassed.

Key	FONT
Value	Font
Default	None, perform default resolution
Description	A way for users to override the resolution of font attributes into a `Font`, or force use of a particular `Font` instance. This also allows users to specify subclasses of `Font` in cases where a `Font` can be subclassed.

CHAR_REPLACEMENT

public static final TextAttribute CHAR_REPLACEMENT

Attribute key for a user_defined glyph to display in the text in lieu of a character.

Key
CHAR_REPLACEMENT

Value
GraphicAttribute

Description
Allows the user to specify an empty position plus metric information. This method is used to reserve space for a graphic or other embedded component. Required for correct BIDI position of 'inline' components within a line. An optional convenience method allows drawing for simple cases. Follows the Microsoft model: the character that this is applied to should be ?.

Key	CHAR_REPLACEMENT
Value	GraphicAttribute
Description	Allows the user to specify an empty position plus metric information. This method is used to reserve space for a graphic or other embedded component. Required for correct BIDI position of 'inline' components within a line. An optional convenience method allows drawing for simple cases. Follows the Microsoft model: the character that this is applied to should be ?.

FOREGROUND

public static final TextAttribute FOREGROUND

Attribute key for the foreground paint adornment.

Key
FOREGROUND

Value
Paint

Default
Color.black

Description
Specify the foreground Paint (or Color) of the text.

Key	FOREGROUND
Value	Paint
Default	Color.black
Description	Specify the foreground Paint (or Color) of the text.

BACKGROUND

public static final TextAttribute BACKGROUND

Attribute key for the background Paint adornment.

Key
BACKGROUND

Value
Paint

Default
null

Description
Specify the background Paint (or Color) of the text.

Key	BACKGROUND
Value	Paint
Default	null
Description	Specify the background Paint (or Color) of the text.

UNDERLINE

public static final TextAttribute UNDERLINE

Attribute key for underline adornments.

Key
UNDERLINE

Value
Integer

Constants
UNDERLINE_ON = 0

Default
none

Description
An embellishment added to the glyphs rendered by a font.

Fallback

Key	UNDERLINE
Value	Integer
Constants	UNDERLINE_ON = 0
Default	none
Description	An embellishment added to the glyphs rendered by a font.
Fallback

UNDERLINE_ON

public static final Integer UNDERLINE_ON

Standard underline at the roman baseline for roman text, and below the decenders for other text.

See Also:: UNDERLINE

STRIKETHROUGH

public static final TextAttribute STRIKETHROUGH

Attribute key for the strikethrough adornment.

Key
STRIKETHROUGH

Value
Boolean

Constants
true = on, false = off

Default
off

Description
An embellishment added to the glyphs rendered by a font.

Key	STRIKETHROUGH
Value	Boolean
Constants	true = on, false = off
Default	off
Description	An embellishment added to the glyphs rendered by a font.

STRIKETHROUGH_ON

public static final Boolean STRIKETHROUGH_ON

A single strikethrough.

See Also:: STRIKETHROUGH

RUN_DIRECTION

public static final TextAttribute RUN_DIRECTION

Attribute key for the run direction of the line.

Key
RUN_DIRECTION

Value
Boolean

Constants
RUN_DIRECTION_LTR = true, RUN_DIRECTION_RTL = false

Default
Use the default Unicode base direction from the BIDI algorithm.

Description

Specifies which base run direction to use when positioning mixed directional runs within a paragraph. If this value is RUN_DIRECTION_DEFAULT, TextLayout uses the default Unicode base direction from the BIDI algorithm.

This attribute should have the same value over the whole paragraph.

Key	RUN_DIRECTION
Value	Boolean
Constants	RUN_DIRECTION_LTR = true, RUN_DIRECTION_RTL = false
Default	Use the default Unicode base direction from the BIDI algorithm.
Description	Specifies which base run direction to use when positioning mixed directional runs within a paragraph. If this value is RUN_DIRECTION_DEFAULT, `TextLayout` uses the default Unicode base direction from the BIDI algorithm. This attribute should have the same value over the whole paragraph.

RUN_DIRECTION_LTR

public static final Boolean RUN_DIRECTION_LTR

Left-to-right run direction.

See Also:: RUN_DIRECTION

RUN_DIRECTION_RTL

public static final Boolean RUN_DIRECTION_RTL

Right-to-left run direction.

See Also:: RUN_DIRECTION

BIDI_EMBEDDING

public static final TextAttribute BIDI_EMBEDDING

Attribute key for the embedding level for nested bidirectional runs.

Key
BIDI_EMBEDDING

Value
Integer

Limits
Positive values 1 through 15 are embedding levels, negative values
through -15 are override levels

Default
Use standard BIDI to compute levels from formatting characters in the text.

Description
Specifies the bidi embedding level of the character. When this attribute is present anywhere in a paragraph, then the Unicode characters RLO, LRO, RLE, LRE, PDF are disregarded in the BIDI analysis of that paragraph. See the Unicode Standard v. 2.0, section 3-11.

Key	BIDI_EMBEDDING
Value	Integer
Limits	Positive values 1 through 15 are embedding levels, negative values through -15 are override levels
Default	Use standard BIDI to compute levels from formatting characters in the text.
Description	Specifies the bidi embedding level of the character. When this attribute is present anywhere in a paragraph, then the Unicode characters RLO, LRO, RLE, LRE, PDF are disregarded in the BIDI analysis of that paragraph. See the Unicode Standard v. 2.0, section 3-11.

JUSTIFICATION

public static final TextAttribute JUSTIFICATION

Attribute key for the justification of a paragraph.

Key
JUSTIFICATION

Value
Float

Limits
0.0 through1.0

Default
1.0

Description

Specifies which fraction of the extra space to use when justification is requested. For example, if the line is 50 points wide and the margins are 70 points apart, a value of 0.5 means that the line is padded to reach a width of 60 points.

This attribute should have the same value over the whole paragraph.

Key	JUSTIFICATION
Value	Float
Limits	0.0 through1.0
Default	1.0
Description	Specifies which fraction of the extra space to use when justification is requested. For example, if the line is 50 points wide and the margins are 70 points apart, a value of 0.5 means that the line is padded to reach a width of 60 points. This attribute should have the same value over the whole paragraph.

JUSTIFICATION_FULL

public static final Float JUSTIFICATION_FULL

Justify the line to the full requested width.

See Also:: JUSTIFICATION

JUSTIFICATION_NONE

public static final Float JUSTIFICATION_NONE

Do not allow the line to be justified.

See Also:: JUSTIFICATION

INPUT_METHOD_HIGHLIGHT

public static final TextAttribute INPUT_METHOD_HIGHLIGHT

Attribute key for input method highlight styles.

Values are instances of InputMethodHighlight. These instances should be wrapped in Annotation instances if segments need to be highlighted separately.

Input method highlights are used while text is being composed using an input method. Text editing components should retain them even if they generally only deal with unstyled text, and make them available to the drawing routines.

See Also:: InputMethodHighlight

SWAP_COLORS

public static final TextAttribute SWAP_COLORS

Attribute key for swapping foreground and background Paints (or Colors).

Values are instances of Boolean. The default is not to swap the foreground and background. If the foreground and background attributes are both defined, this causes them to be swapped when rendering text. If either is defaulted, the exact effect is undefined--generally it will produce an 'inverted' appearance.

SWAP_COLORS_ON

public static final Boolean SWAP_COLORS_ON

Swap foreground and background.

Constructor Detail

TextAttribute

protected TextAttribute(String name)

Constructs a TextAttribute with the specified name.

Parameters:: name - the attribute name to assign to this TextAttribute

Method Detail

readResolve

protected Object readResolve()
                      throws InvalidObjectException

Resolves instances being deserialized to the predefined constants.

Overrides:: readResolve in class AttributedCharacterIterator.Attribute