Practical Programming in Tcl & Tk, Third Edition

Chapter 29. Simple Tk Widgets

This chapter describes several simple Tk widgets: the frame, label, message, and scale. In general, these widgets require minimal setup to be useful in your application. The bell command rings the terminal bell.

This chapter describes four simple widgets and the bell command.

• The frame is a building block for widget layout. A toplevel is a frame that is detached from the main window.

• The label provides a line of read-only text.

• The message provides a read-only block of text that gets formatted onto several lines.

• The scale is a slider-like widget used to set a numeric value.

• The bell command rings the terminal bell.

Chapters 37, 38, and 39 go into more detail about some of the generic widget attributes shared by the ...