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

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java.awt.font
Class GlyphJustificationInfo

java.lang.Object
  |
  +--java.awt.font.GlyphJustificationInfo

public final class GlyphJustificationInfo
extends Object

The GlyphJustificationInfo class represents information about the justification properties of a glyph. A glyph is the visual representation of one or more characters. Many different glyphs can be used to represent a single character or combination of characters. The four justification properties represented by GlyphJustificationInfo are weight, priority, absorb and limit.

Weight is the overall 'weight' of the glyph in the line. Generally it is proportional to the size of the font. Glyphs with larger weight are allocated a correspondingly larger amount of the change in space.

Priority determines the justification phase in which this glyph is used. All glyphs of the same priority are examined before glyphs of the next priority. If all the change in space can be allocated to these glyphs without exceeding their limits, then glyphs of the next priority are not examined. There are four priorities, kashida, whitespace, interchar, and none. KASHIDA is the first priority examined. NONE is the last priority examined.

Absorb determines whether a glyph absorbs all change in space. Within a given priority, some glyphs may absorb all the change in space. If any of these glyphs are present, no glyphs of later priority are examined.

Limit determines the maximum or minimum amount by which the glyph can change. Left and right sides of the glyph can have different limits.

Each GlyphJustificationInfo represents two sets of metrics, which are growing and shrinking. Growing metrics are used when the glyphs on a line are to be spread apart to fit a larger width. Shrinking metrics are used when the glyphs are to be moved together to fit a smaller width.

Field Summary

boolean growAbsorb
          If true, this glyph absorbs all extra space at this and lower priority levels when it grows.

float growLeftLimit
          The maximum amount by which the left side of this glyph can grow.

int growPriority
          The priority level of this glyph as it is growing.

float growRightLimit
          The maximum amount by which the right side of this glyph can grow.

static int PRIORITY_INTERCHAR
          The second lowest justification priority.

static int PRIORITY_KASHIDA
          The highest justification priority.

static int PRIORITY_NONE
          The lowest justification priority.

static int PRIORITY_WHITESPACE
          The second highest justification priority.

boolean shrinkAbsorb
          If true,this glyph absorbs all remaining shrinkage at this and lower priority levels as it shrinks.

float shrinkLeftLimit
          The maximum amount by which the left side of this glyph can shrink (a positive number).

int shrinkPriority
          The priority level of this glyph as it is shrinking.

float shrinkRightLimit
          The maximum amount by which the right side of this glyph can shrink (a positive number).

float weight
          The weight of this glyph.

Constructor Summary

GlyphJustificationInfo(float weight, boolean growAbsorb, int growPriority, float growLeftLimit, float growRightLimit, boolean shrinkAbsorb, int shrinkPriority, float shrinkLeftLimit, float shrinkRightLimit)
          Constructs information about the justification properties of a glyph.

Methods inherited from class java.lang.Object

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

Field Detail

PRIORITY_KASHIDA

public static final int PRIORITY_KASHIDA

The highest justification priority.

PRIORITY_WHITESPACE

public static final int PRIORITY_WHITESPACE

The second highest justification priority.

PRIORITY_INTERCHAR

public static final int PRIORITY_INTERCHAR

The second lowest justification priority.

PRIORITY_NONE

public static final int PRIORITY_NONE

The lowest justification priority.

weight

public final float weight

The weight of this glyph.

growPriority

public final int growPriority

The priority level of this glyph as it is growing.

growAbsorb

public final boolean growAbsorb

If true, this glyph absorbs all extra space at this and lower priority levels when it grows.

growLeftLimit

public final float growLeftLimit

The maximum amount by which the left side of this glyph can grow.

growRightLimit

public final float growRightLimit

The maximum amount by which the right side of this glyph can grow.

shrinkPriority

public final int shrinkPriority

The priority level of this glyph as it is shrinking.

shrinkAbsorb

public final boolean shrinkAbsorb

If true,this glyph absorbs all remaining shrinkage at this and lower priority levels as it shrinks.

shrinkLeftLimit

public final float shrinkLeftLimit

The maximum amount by which the left side of this glyph can shrink (a positive number).

shrinkRightLimit

public final float shrinkRightLimit

The maximum amount by which the right side of this glyph can shrink (a positive number).

Constructor Detail

GlyphJustificationInfo

public GlyphJustificationInfo(float weight,
                              boolean growAbsorb,
                              int growPriority,
                              float growLeftLimit,
                              float growRightLimit,
                              boolean shrinkAbsorb,
                              int shrinkPriority,
                              float shrinkLeftLimit,
                              float shrinkRightLimit)

Constructs information about the justification properties of a glyph.

Parameters:: weight - the weight of this glyph when allocating space; growAbsorb - if true this glyph absorbs all extra space at this priority and lower priority levels when it grows; growPriority - the priority level of this glyph when it grows; growLeftLimit - the maximum amount by which the left side of this glyph can grow; growRightLimit - the maximum amount by which the right side of this glyph can grow; shrinkAbsorb - if true, this glyph absorbs all remaining shrinkage at this and lower priority levels when it shrinks; shrinkPriority - the priority level of this glyph when it shrinks; shrinkLeftLimit - the maximum amount by which the left side of this glyph can shrink (a positive number); shrinkRightLimit - the maximum amount by which the right side of this glyph can shrink (a postive number)