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Practical Programming in Tcl & Tk, Third Edition
By Brent B. Welch

Table of Contents
Part IV.  Tk Widgets


Chapter 28. The Resource Database

This chapter describes the use of the resource database, and how users can define buttons and menus via resource specifications. This chapter describes the option command.

Tk supports a resource database that holds specifications of widget attributes such as fonts and colors. You can control all attributes of the Tk widgets through the resource database. It can also be used as a more general database of application-specific parameter settings.

Because a Tk application can use Tcl for customization, it might not seem necessary to use the resource database. The resource database is, however, a useful tool for your Tk application. A developer can make global changes with just a few database entries. In addition, it lets users and site administrators customize applications without modifying the code.


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