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## org.apache.batik.gvt.text
Interface TextSpanLayout

All Known Implementing Classes:
  GlyphLayout

public interface TextSpanLayout

Class that performs layout of attributed text strings into glyph sets paintable by TextPainter instances. Similar to java.awt.font.TextLayout in function and purpose. Note that while this utility interface is provided for the convenience of `TextPainter` implementations, conforming `TextPainter`s are not required to use this class.

See Also:
  `TextLayout`, `TextPainter`

Field Summary
`static int` | `DECORATION_ALL`
`static int` | `DECORATION_OVERLINE`
`static int` | `DECORATION_STRIKETHROUGH`
`static int` | `DECORATION_UNDERLINE`

Method Summary
`void` | `draw(java.awt.Graphics2D g2d)` Paints the specified text layout using the specified Graphics2D and rendering context.
`java.awt.geom.Point2D` | `getAdvance2D()` Returns the current text position at the completion of glyph layout.
`java.awt.geom.Rectangle2D` | `getBounds2D()` Returns the rectangular bounds of the completed glyph layout.
`int` | `getCharacterCount(int startGlyphIndex, int endGlyphIndex)` Returns the number of chars represented by the glyphs within the specified range.
`double` | `getComputedOrientationAngle(int index)` Return the rotation angle applied to the character.
`java.awt.Shape` | `getDecorationOutline(int decorationType)` Returns the outline of the specified decorations on the glyphs, transformed by an AffineTransform.
`java.awt.geom.Rectangle2D` | `getGeometricBounds()` Returns the bounds of the geometry (this is always the bounds of the outline).
`float[]` | `getGlyphAdvances()` Returns the advance between each glyph in text progression direction.
`int` | `getGlyphCount()` Returns the number of glyphs in this layout.
`int` | `getGlyphIndex(int charIndex)` Returns the glyph index of the glyph that has the specified char index.
`GVTGlyphMetrics` | `getGlyphMetrics(int glyphIndex)` Returns the Metrics for a particular glyph.
`GVTGlyphVector` | `getGlyphVector()` Return the glyph vector asociated to this layout.
`java.awt.Shape` | `getHighlightShape(int beginCharIndex, int endCharIndex)` Returns a Shape which encloses the currently selected glyphs as specified by glyph indices `begin/tt> and `end`.`
`java.awt.geom.Point2D` | `getOffset()` Returns the current text position at the completion beginning of glyph layout, before the application of explicit glyph positioning attributes.
`java.awt.Shape` | `getOutline()` Returns the outline of the completed glyph layout, transformed by an AffineTransform.
`java.awt.geom.Point2D` | `getTextPathAdvance()`
`boolean` | `hasCharacterIndex(int index)` Return true is the character index is represented by glyphs in this layout.
`TextHit` | `hitTestChar(float x, float y)` Perform hit testing for coordinate at x, y.
`boolean` | `isAltGlyph()` Return true if this text run represents an alt glyph.
`boolean` | `isLeftToRight()` Returns true if the text direction in this layout is from left to right.
`boolean` | `isOnATextPath()` Returns true if this layout in on a text path.
`boolean` | `isVertical()` Returns true if the advance direction of this text is vertical.
`void` | `setOffset(java.awt.geom.Point2D offset)` Sets the text position used for the implicit origin of glyph layout.
`void` | `setScale(float xScale, float yScale, boolean adjSpacing)` Sets the scaling factor to use for string.

Field Detail

### DECORATION_UNDERLINE

    public static final int DECORATION_UNDERLINE

See Also:
  Constant Field Values

### DECORATION_STRIKETHROUGH

    public static final int DECORATION_STRIKETHROUGH

See Also:
  Constant Field Values

### DECORATION_OVERLINE

    public static final int DECORATION_OVERLINE

See Also:
  Constant Field Values

### DECORATION_ALL

    public static final int DECORATION_ALL

See Also:
  Constant Field Values

Method Detail

### draw

    public void draw(java.awt.Graphics2D g2d)

  Paints the specified text layout using the specified Graphics2D and rendering context.

  Parameters:
    `g2d` - the Graphics2D to use

### getDecorationOutline

    public java.awt.Shape getDecorationOutline(int decorationType)

  Returns the outline of the specified decorations on the glyphs, transformed by an AffineTransform.

  Parameters:
    `decorationType` - an integer indicating the type(s) of decorations included in this shape. May be the result of "OR-ing" several values together: e.g. `DECORATION_UNDERLINE | DECORATION_STRIKETHROUGH`

### getBounds2D

    public java.awt.geom.Rectangle2D getBounds2D()

  Returns the rectangular bounds of the completed glyph layout. This includes stroking information, this does not include deocrations.

### getGeometricBounds

    public java.awt.geom.Rectangle2D getGeometricBounds()

  Returns the bounds of the geometry (this is always the bounds of the outline).

### getOutline

    public java.awt.Shape getOutline()

  Returns the outline of the completed glyph layout, transformed by an AffineTransform.

### getAdvance2D

    public java.awt.geom.Point2D getAdvance2D()

  Returns the current text position at the completion of glyph layout. (This is the position that should be used for positioning adjacent layouts.)

### getGlyphAdvances

    public float[] getGlyphAdvances()

  Returns the advance between each glyph in text progression direction.

### getGlyphMetrics

    public GVTGlyphMetrics getGlyphMetrics(int glyphIndex)

  Returns the Metrics for a particular glyph.

### getTextPathAdvance

    public java.awt.geom.Point2D getTextPathAdvance()

### getOffset

    public java.awt.geom.Point2D getOffset()

  Returns the current text position at the completion beginning of glyph layout, before the application of explicit glyph positioning attributes.

### setScale

    public void setScale(float xScale,
                         float yScale,
                         boolean adjSpacing)

  Sets the scaling factor to use for string. if ajdSpacing is true then only the spacing between glyphs will be adjusted otherwise the glyphs and the spaces between them will be adjusted.

  Parameters:
    `xScale` - Scale factor to apply in X direction.
    `yScale` - Scale factor to apply in Y direction.
    `adjSpacing` - True if only spaces should be adjusted.

### setOffset

    public void setOffset(java.awt.geom.Point2D offset)

  Sets the text position used for the implicit origin of glyph layout. Ignored if multiple explicit glyph positioning attributes are present in ACI (e.g. if the aci has multiple X or Y values).

### getHighlightShape

    public java.awt.Shape getHighlightShape(int beginCharIndex,
                                            int endCharIndex)

  Returns a Shape which encloses the currently selected glyphs as specified by glyph indices `begin/tt> and `end`.

  `

### hitTestChar

    public TextHit hitTestChar(float x,
                               float y)

  Perform hit testing for coordinate at x, y.

  Parameters:
    `x` - the x coordinate of the point to be tested.
    `y` - the y coordinate of the point to be tested.
  Returns:
    a TextHit object encapsulating the character index for successful hits and whether the hit is on the character leading edge.

### isVertical

    public boolean isVertical()

  Returns true if the advance direction of this text is vertical.

### isOnATextPath

    public boolean isOnATextPath()

  Returns true if this layout in on a text path.

### getGlyphCount

    public int getGlyphCount()

  Returns the number of glyphs in this layout.

### getCharacterCount

    public int getCharacterCount(int startGlyphIndex,
                                 int endGlyphIndex)

  Returns the number of chars represented by the glyphs within the specified range.

  Parameters:
    `startGlyphIndex` - The index of the first glyph in the range.
    `endGlyphIndex` - The index of the last glyph in the range.
  Returns:
    The number of chars.

### getGlyphIndex

    public int getGlyphIndex(int charIndex)

  Returns the glyph index of the glyph that has the specified char index.

  Parameters:
    `charIndex` - The original index of the character in the text node's text string.
  Returns:
    The index of the matching glyph in this layout's glyph vector, or -1 if a matching glyph could not be found.

### isLeftToRight

    public boolean isLeftToRight()

  Returns true if the text direction in this layout is from left to right.

### hasCharacterIndex

    public boolean hasCharacterIndex(int index)

  Return true is the character index is represented by glyphs in this layout.

  Parameters:
    `index` - index of the character in the ACI.
  Returns:
    true if the layout represents that character.

### getGlyphVector

    public GVTGlyphVector getGlyphVector()

  Return the glyph vector asociated to this layout.

  Returns:
    glyph vector

### getComputedOrientationAngle

    public double getComputedOrientationAngle(int index)

  Return the rotation angle applied to the character.

  Parameters:
    `index` - index of the character in the ACI
  Returns:
    rotation angle

### isAltGlyph

    public boolean isAltGlyph()

  Return true if this text run represents an alt glyph.

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Copyright © 2004 Apache Software Foundation. All Rights Reserved.