Open any font chooser in an Apple program -- like TextEdit. As you
select each font family, you'll see at least one style available.
Note many fonts simply do not support italics or bold. On my computer
about 26 fonts support italics, 48 do not.
In Java 1.4.2, we're querying for a list of available font families
with this method:
GraphicsEnvironment.getAvailableFontFamilyNames().
From this list, we create java.awt.Font objects.
Now with any java.awt.Font object, we can say:
myFont = myFont.deriveFont(Font.BOLD);
or
myFont = myFont.deriveFont(Font.ITALIC);
Subsequent calls to myFont.isBold() or myFont.isItalic() will return
true appropriately. However, when you render them on the screen SOME
fonts are identical to their non-bold, non-italic counterparts. (If
you open up the same fonts in TextEdit, you'll see that these fonts
simply don't support an italic and/or bold attribute -- which would
explain why Java is rendering them the way it is.)
In our program we have a checkbox to toggle the italic attribute and
another checkbox to toggle the bold attribute. We would like to
disable these for the fonts that don't support those attributes.
Now we've figured out a way to tell if a java Font supports italics or
not on Mac:
Font myFont = ...;
boolean supportsItalics =
(myFont.deriveFont(Font.PLAIN).getItalicAngle()!
=myFont.deriveFont(Font.ITALIC).getItalicAngle());
So based on this hack-ish approach, we can correctly disabled our
'italics' checkbox when appropriate.
Does anyone know of a similar approach we can try to see if a font
supports the bold attribute on Mac?
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