Volume 6A: Motif Programming Manual

In Motif 1.1, the first font in widget's font list is the default character set for that widget. If the widget does not have a

font list, it uses a default character set referred to by the constant XmSTRING_DEFAULT_CHARSET. If the user has

set the LANG environment variable, its value is used for this character set. If this value is invalid or its associated font

cannot be used, Motif uses the value of XmFALLBACK_CHARSET, which is vendor−defined but typically set to

"ISO8859−1".

For backwards compatibility, Motif 1.2 essentially equates XmFONTLIST_DEFAULT_TAG with

XmSTRING_DEFAULT_CHARSET when it cannot find an exact match between a compound string and a font list.

XmFONTLIST_DEFAULT_TAG in a compound string or font list matches the tag used in creating a compound string

or specifying a font list entry with the tag XmSTRING_DEFAULT_CHARSET. Some Motif widgets define font list

resources that allow them to provide a consistent appearance for all of their children. In Motif 1.2, the VendorShell

widget defines the XmNbuttonFontList, XmNlabelFontList, and XmNtextFontList resources, while the

MenuShell defines XmNbuttonFontList and XmNlabelFontList. These resources apply to all of the buttons,

Labels, and Text widgets that are descendents of the widget. In Motif 1.1, the VendorShell and MenuShell only

defined the XmNdefaultFontList resource; this resource applied to all of the children of the widget. For

backwards compatibility, if one of the more specific font list resources is not set, its value ...