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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 color picker


The tk_chooseColor command displays a dialog window that allows the user to select a color. The actual appearance of the color picker will vary, based on the display manager in use. The return hexadecimal value of the color selected is returned. If the user clicks on the Cancel button, an empty string is returned.

The syntax is as follows:

tk_chooseColor option value …

The tk_chooseColor command accepts one or more option value pairs as detailed in the following table. If no option value pairs are provided, the command will display a dialog with the default values.

Option

Interpretation

-initialcolor color

Sets the starting color to display in the color picker.

-parent window

Specifies the parent of the dialog. The dialog is displayed on top of the parent.

-title string

Sets the text to be displayed in the dialog title bar.

How to do it…

In the following example, we will create a frame and then display a color picker dialog and assign the return...

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