Class GraphicFont

java.lang.Object
   |
   +----GraphicFont

public class GraphicFont
extends Object

A class that allows the use of a font encoded in the GraphicFont format. It allows much of the same functionality as Sun's Font and FontMetrics classes. For example:

   g = getGraphics();
   GraphicFont gf = new GraphicFont(fontImage);
   gf.setFgColor(Color.green);
   gf.drawString(g, "This is a string drawn with GraphicFont.", 10, 10);
   int ascent = gf.getAscent();

Version:: 1.0 February 22, 1996
Author:: Kevin Hughes, kevinh@eit.com (Note: this address is no longer valid. Kevin has dissappeared.)
See Also:: Font, FontMetrics

Constructor Index

GraphicFont(Image): Initializes a new GraphicFont with the encoded font passed to it.

Method Index

charImage(int): Returns a rendered image given a character.
charWidth(int): Returns the width in pixels of a given character.
drawString(Graphics, String, int, int): Draws a rendered image of a string given a graphics context, a string, and the coordinates to draw at.
drawString(Graphics, String, int, int, int): Draws a rendered image of a left-justified text block given a graphics context, a string, the coordinates to draw at, and a width in pixels.
getAscent(): Gets the ascent of the current font, the distance from the baseline to the top of the regular characters (typically A-Z, a-z, 0-9).
getCharSpace(): Gets the space between non-space characters.
getDescent(): Gets the descent of the current font, the distance from the baseline to the bottom of the regular characters (typically A-Z, a-z, 0-9).
getHeight(): Gets the total height of the current font, which amounts to the ascent plus the descent plus the leading.
getLeading(): Gets the leading of the current font, the space between the descent of one line and the ascent of the line below it.
getMaxAscent(): Gets the maximum ascent of the current font.
getMaxDescent(): Gets the maximum descent of the current font.
getTabWidth(): Gets the tab width in how many space characters make up a tab character.
getWordSpace(): Gets the word spacing of the current font.
setBgColor(Color): Sets the background color the font characters are drawn against.
setCharSpace(int): Sets the character spacing in pixels.
setColor(Color): Sets the foreground color, the color the font characters are drawn in.
setFgColor(Color): Sets the foreground color.
setFont(Image): Sets a new font.
setLeading(int): Sets the leading in pixels.
setTabWidth(int): Sets the tab width as the number of spaces that make up a tab character.
setWordSpace(int): Sets the word spacing in pixels.
stringImage(String): Returns a rendered image given a string using the current font.
stringImage(String, int): Returns a rendered image of a left-justified text block given a string and a width in pixels.
stringWidth(String): Returns the width in pixels of a given string.

Constructors

GraphicFont

 public GraphicFont(Image loadedImage)

Initializes a new GraphicFont with the encoded font passed to it. Font metrics information is initialized with the default values as suggested by the font's author. The font image must be completely loaded beforehand.

Parameters:: loadedImage - An image encoded in the GraphicFont format

Methods

setFont

 public void setFont(Image loadedImage)

Sets a new font. Font metrics information is set to the default values as suggested by the font's author. The font image must be completely loaded beforehand.

Parameters:: loadedImage - An image encoded in the GraphicFont format

getHeight

 public int getHeight()

Gets the total height of the current font, which amounts to the ascent plus the descent plus the leading.

Returns:: The total height of the font in pixels

getAscent

 public int getAscent()

Gets the ascent of the current font, the distance from the baseline to the top of the regular characters (typically A-Z, a-z, 0-9).

Returns:: The typical ascent in pixels

getDescent

 public int getDescent()

Gets the descent of the current font, the distance from the baseline to the bottom of the regular characters (typically A-Z, a-z, 0-9).

Returns:: The typical descent in pixels

getMaxAscent

 public int getMaxAscent()

Gets the maximum ascent of the current font. No character in the font extends above the baseline further than this.

Returns:: The maximum ascent in pixels

getMaxDescent

 public int getMaxDescent()

Gets the maximum descent of the current font. No character in the font descends below the baseline further than this.

Returns:: The maximum descent in pixels

getLeading

 public int getLeading()

Gets the leading of the current font, the space between the descent of one line and the ascent of the line below it.

Returns:: The leading in pixels

getWordSpace

 public int getWordSpace()

Gets the word spacing of the current font. The space character is remapped to this.

Returns:: The typical space between words in pixels

getCharSpace

 public int getCharSpace()

Gets the space between non-space characters.

Returns:: The typical space between characters in pixels

getTabWidth

 public int getTabWidth()

Gets the tab width in how many space characters make up a tab character. The default is five - five spaces per tab.

Returns:: The tab width

setLeading

 public void setLeading(int i)

Sets the leading in pixels. The setting will only be visible when creating text blocks. The leading can be set to a negative value.

Parameters:: i - The leading to set the font to

setWordSpace

 public void setWordSpace(int i)

Sets the word spacing in pixels. The space character is remapped to this. Negative values can be used.

Parameters:: i - The amount of word spacing used in drawing strings.

setCharSpace

 public void setCharSpace(int i)

Sets the character spacing in pixels. Negative values can be used.

Parameters:: i - The amount of space between individual characters.

setTabWidth

 public void setTabWidth(int i)

Sets the tab width as the number of spaces that make up a tab character.

Parameters:: i - The number of spaces that comprise a tab character

setColor

 public void setColor(Color c)

Sets the foreground color, the color the font characters are drawn in.

Parameters:: c - The color characters will be drawn in

setFgColor

 public void setFgColor(Color c)

Sets the foreground color. Same as setColor(Color).

Parameters:: c - The color characters will be drawn in

setBgColor

 public void setBgColor(Color c)

Sets the background color the font characters are drawn against. This is very useful for displaying different backgrounds for antialiased fonts.

Parameters:: c - The color characters will be drawn against. If the background is set to null, the background will be transparent.

stringWidth

 public int stringWidth(String s)

Returns the width in pixels of a given string. If a character is unsupported in the font, the width of an asterisk character or suitable substitue is used.

Parameters:: s - The desired string
Returns:: The width of the string after rendering

charWidth

 public int charWidth(int c)

Returns the width in pixels of a given character. If the character is unknown, the width of an asterix character or suitable substitue is used.

Parameters:: c - The desired character
Returns:: The width of the character after rendering

stringImage

 public Image stringImage(String s)

Returns a rendered image given a string using the current font. If a character is unknown, an asterisk character is substituted. Non-US characters that are not supported in the font may be substituted for simpler ASCII characters.

Parameters:: s - The desired string
Returns:: The final rendered image. If no background is set, the background will be transparent.

stringImage

 public Image stringImage(String s,
                          int width)

Returns a rendered image of a left-justified text block given a string and a width in pixels. Only spaces are wrapped. Newline characters (\n) create hard breaks.

Parameters:: s - The desired string; width - The maximum width of the text block
Returns:: The final rendered image. If no background is set, the background will be transparent.

drawString

 public void drawString(Graphics g,
                        String s,
                        int x,
                        int y)

Draws a rendered image of a string given a graphics context, a string, and the coordinates to draw at. Similar to Font.drawString(), the Y coordinate starts at the baseline of the font.

Parameters:: g - The graphic context to draw into; s - The desired string to render; x - The X coordinate; y - The Y coordinate

drawString

 public void drawString(Graphics g,
                        String s,
                        int x,
                        int y,
                        int width)

Draws a rendered image of a left-justified text block given a graphics context, a string, the coordinates to draw at, and a width in pixels. The Y coordinate starts at the baseline of the first line.

Parameters:: g - The graphic context to draw into; s - The desired string to render; x - The X coordinate; y - The Y coordinate; width - The maximum width of the text block

charImage

 public Image charImage(int c)

Returns a rendered image given a character. If the character is unknown, an asterix or appropriate substitute is returned.

Parameters:: c - The desired character
Returns:: The rendered image of the character. If no background is set, the background will be transparent.