Book Image

Tcl/Tk 8.5 Programming Cookbook

Book Image

Tcl/Tk 8.5 Programming Cookbook

Overview of this book

With Tcl/Tk, you can create full-featured cross-platform applications in a simple and easy-to-understand way without any expensive development package; the only tools required are a simple text editor and your imagination. This practical cookbook will help you to efficiently interact with editors, debuggers, and shell type interactive programs using Tcl/Tk 8. This cookbook will comprehensively guide you through practical implementation of Tcl/Tk 8.5 commands and tools. This book will take you through all the steps needed to become a productive programmer in Tcl/Tk 8. Right from guiding you through the basics to creating a stand-alone application, it provides complete explanation of all the steps along with handy tips and tricks. The book begins with an introduction to the Tcl shell, syntax, variables, and programming best practices in the language. It then explores procedures and the flow of events with control constructs followed by advanced error trapping and recovery. From Chapter 4, a detailed study of string expressions and handling enables you to handle various string functions and use lists to expand the string functionality. The book then discusses in-depth the Tcl Dictionary and how to utilize it to store and retrieve data. File operations and Tk GUI handling are covered extensively along with a developing a real-world address book application to practice the concepts learned.
Table of Contents (20 chapters)
Tcl/Tk 8.5 Programming Cookbook
About the Author
About the Reviewers

Creating an address book interface

In the following example, we will create an address book interface containing button, entry, label, and frame widgets. This will be the basis for the final application and illustrate how to use the grid and pack commands to create a more complex layout. The interface design is as follows:


Column 0

Column 1

Column 2

Column 3


Row 0

First Name Entry

Last Name Entry


Photo Label


Row 1

First Name Label

Last Name Label


Row 2

Address Entry


Row 3

Address Label


Row 4

City Entry

State Entry

Zip Entry


Row 5

City Label

State Label

Zip Label


Row 6

Phone Entry


Row 7

Phone Label


Photo Label


Row 8

Previous Button


Next Button


Row 9

Add Button

Save Button

Delete Button

Exit Button


Getting ready

To complete the following example, open the text editor of your choice and enter the following text. Then save the file in your path with the name address_book.tcl.

# Load the Tk Package
package require Tk...