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Tcl/Tk 8.5 Programming Cookbook

You're reading from   Tcl/Tk 8.5 Programming Cookbook With over 100 recipes, this Cookbook is ideal for both beginners and advanced Tcl/Tk programmers. From the basics to creating applications, it‚Äôs full of indispensable tips and tricks to make the most of the language.

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Product type Paperback
Published in Feb 2011
Publisher Packt
ISBN-13 9781849512985
Length 236 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (20) Chapters Close

Tcl/Tk 8.5 Programming Cookbook
Credits
About the Author
1. Acknowledgment
About the Reviewers
2. www.PacktPub.com
3. Preface
1. The Tcl Shell FREE CHAPTER 2. Using the Building Blocks Control Constructs 3. Error Handling 4. Handling String Expressions 5. Expanding String Functionality Using Lists 6. The Tcl Dictionary 7. File Operations 8. Tk GUI Programming with Tcl/Tk 9. Configuring and Controlling Tk Widgets 10. Geometry Management 11. Using Tcl Built-in Dialog Windows 12. Creating and Managing Menus 13. Creating the Address Book Application

Displaying the file selection dialog


The tk_getOpenFile and tk_getSaveFile commands both display a dialog window that allows the end user to select a file to either be opened or saved. The tk_getOpenFile is used for selecting an existing file only. The tk_getSaveFile is similar to the Windows Save As dialog box and allows a user to specify a name or select an existing file. If an existing file is selected, the end user is automatically prompted to confirm if the existing file may be overwritten. If the Cancel button is selected, an empty string is returned.

The syntaxes are as follows:

tk_getOpenFile option value …
tk_getSaveFile option value …

Both commands accept one or more option value pair(s), as detailed in the following table. If no option value pairs are provided, the command will display the default values for the dialog.

Option

Interpretation

-defaultextension extension

This is used to specify a string to be appended to the filename if the filename provided has no extension...

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