Practical Programming in Tcl & Tk, Third Edition

App-Defaults Files

We will assume that it is sufficient to have two sources of application defaults: a per-application database and a per-user database. In addition, we will allow for some resources to be specific to color and monochrome displays. The following example initializes the preference package by reading in the per-application and per-user resource specification files. There is also an initialization of the global array pref that will be used to hold state information about the preferences package. The Pref_Init procedure is called like this:

Pref_Init $library/foo-defaults ~/.foo-defaults

We assume $library is the directory holding support files for the foo application, and that per-user defaults will be kept in ~/.foo-defaults