Class variables act as read-only storage for class-constants. They
are normally used for storing setting information, such as fonts,
colours etc. For this reason, the default value for a class_variable
is defined with the declaration of it, but this default my be overruled
using the Defaults
file. The system defaults file is
located in the XPCE home directory (`@pce<-
home').
This file contains an
include statement, including the file ~/.xpce/Defaults
, (11)
which may be used by the developer and application user to specify
defaults.
Many XPCE built-in classes define class-variables. These can be examined using the ClassBrowser (see section 3.3.1) from the online manual tools.