Defining Preferences
This section describes the Pref_Add procedure that an application uses to define preference items. A preference item defines a relationship between a Tcl variable and a resource name. If the Tcl variable is undefined at the time Pref_Add is called, then it is set from the value for the resource. If the resource is not defined, then the variable is set to the default value.
 | Hide simple data structures with Tcl procedures. |
A default value, a label, and a more extensive help string are associated with each item, which is represented by a Tcl list of five elements. A few short routines hide the layout of the item lists and make ...
Get Practical Programming in Tcl & Tk, Third Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
