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

Table of Contents
Part V.  Tk Details


Chapter 37. Tk Widget Attributes

Each Tk widget has a number of attributes that affect its appearance and behavior. This chapter describes attributes in general, and covers some of the size and appearance-related attributes. The next two chapters cover the attributes associated with colors, images, and text.

This chapter describes some of the attributes that are in common among many Tk widgets. A widget always provides a default value for its attributes, so you can avoid specifying most of them. If you want to fine-tune things, however, you'll need to know about all the widget attributes.

The native widgets used in Tk 8.0 ignore some of the original Tk attributes. This is because there is no support for them in the system widgets. For example, the buttons on Macintosh do not honor the borderWidth attribute, and they do not display a highlight focus. The native scrollbars on Windows and Macintosh have similar limitations. This chapter notes these limitations in the discussion of each attribute.


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