Tcl/Tk 8.5 Programming Cookbook电子书

Tcl/Tk 8.5 Programming Cookbook

Table of Contents

Copyright

Credits

About the Author

Acknowledgment

About the Reviewers

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Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Errata

Piracy

Questions

1. The Tcl Shell

Introduction

The Tcl shell

Writing to the Tcl console

Getting ready

How to do it…

How it works…

Mathematical expressions

Tcl expr operands

Mathematical functions

Computing mathematical expressions

Referencing files in Tcl

UNIX (UNIX, Linux and Mac OS X)

Windows

Variables

Basic variable commands

Getting Ready

How to do it…

How it works…

There's more…

Unsetting a variable

Command line arguments

Launching a Tcl script

Getting Ready

How to do it…

How it works…

There's more…

2. Using the Building Blocks Control Constructs

Introduction

Controlling flow with the if statement

How to do it…

How it works…

There's more…

Looping with for

How to do it…

How it works…

Looping with foreach

How to do it…

How it works…

Looping with while

How to do it…

How it works…

Continuing a procedure

How to do it…

How it works…

Breaking out of a procedure

How to do it…

How it works…

Nested looping

How to do it…

How it works…

There's more…

3. Error Handling

Introduction

Using the catch command

Getting ready

How to do it…

How it works…

Using the eval command

Getting ready

How to do it…

How it works…

There's more…

Using the error command

Getting ready

How to do it…

How it works…

Error handling procedure

Getting ready

How to do it…

How it works…

4. Handling String Expressions

Introduction

Appending to a string

How to do it…

How it works…

Formatting a string

How to do it…

How it works…

Matching a regular expression within a string

Getting ready

How to do it…

How it works…

Performing character substitution on a string

How to do it…

How it works…

Parsing a string using conversion specifiers

How to do it…

How it works…

Determining the length of a string

How to do it…

How it works…

Comparing strings

Getting ready

How to do it…

How it works…

Comparing a string of characters

How to do it…

How it works…

Locating the first instance of a character

How to do it…

How it works…

Locating the index of a character

How to do it…

How it works…

Determining the class of a string

How to do it…

How it works…

Locating the last instance of a string

How to do it…

How it works…

Determining the size of a string

How to do it…

How it works…

Replacing values within a string

How to do it…

How it works…

Locating a pattern within a string

How to do it…

How it works…

Returning a range of characters from a string

How to do it…

How it works…

Creating a string of repeated characters

How to do it…

How it works…

Replacing ranges of characters contained within a string

How to do it…

How it works…

Creating a reverse string

Getting ready

How to do it…

How it works…

Converting a string to lowercase

How to do it…

How it works…

Converting a string to title

How to do it…

How it works…

Converting a string to uppercase

How to do it…

How it works…

Trimming a string

How to do it…

How it works…

Trimming leading whitespace

How to do it…

How it works…

Trimming trailing whitespace

How to do it…

How it works…

Locating the word end

How to do it…

How it works…

Locating the word start

How to do it…

How it works…

Performing variable substitution

How to do it…

How it works…

5. Expanding String Functionality Using Lists

Introduction

Creating a list

How to do it…

How it works…

There's more…

Joining two lists

How to do it…

How it works…

There's more…

Joining list elements

How to do it…

How it works…

There's more…

Appending list elements

How to do it…

How it works…

Assigning list elements to variables

How to do it…

How it works…

Retrieving an element from a list

How to do it…

How it works…

Inserting elements into a list

How to do it…

How it works…

Determining the number of elements

How to do it…

How it works…

Getting a list element

How to do it…

How it works…

Repeating elements

How to do it…

How it works…

There's more…

Replacing elements

How to do it…

How it works…

Reversing elements

How to do it…

How it works…

Searching a list

How to do it…

How it works…

Editing a list

How to do it…

How it works…

Sorting a list

How to do it…

How it works…

Splitting a string into a list

How to do it…

How it works…

6. The Tcl Dictionary

Introduction

Creating a dictionary

How to do it…

How it works…

There's more…

Using set with the dict create command

Appending to a dictionary

How to do it…

How it works…

Determining if a key exists

How to do it…

How it works…

Filtering a dictionary

How to do it…

How it works…

There's more…

Searching a dictionary

How to do it…

How it works…

Getting a record

How to do it…

How it works…

Incrementing a value

How to do it…

How it works…

Getting the dictionary structure

How to do it…

How it works…

Getting a list of keys

How to do it…

How it works…

Appending to an existing record

How to do it…

How it works…

Merging two dictionaries

How to do it…

How it works…

Creating a blank dictionary structure

How to do it…

How it works…

Updating variables from a dictionary

How to do it…

How it works…

Determining the size of a dictionary

How to do it…

How it works…

Getting all records

How to do it…

How it works…

Assigning values

How to do it…

7. File Operations

Introduction

Opening a file

How to do it…

How it works…

There's more…

Configuring a file

How to do it…

There's more…

Opening a command pipeline

How to do it…

How it works…

There's more…

Writing a file

How to do it…

How it works…

Reading a file

How to do it…

How it works…

Closing a file

How to do it…

How it works…

File handling

Getting ready

How to do it…

How it works…

8. Tk GUI Programming with Tcl/Tk

Introduction

Creating a widget

How to do it…

How it works…

There's more…

Writing to the console

How to do it…

How it works…

Setting the attributes of the window through window manager

How to do it…

How it works…

Creating an additional window

Standard options:

Window-specific options

Commands

How to do it…

How it works…

Destroying a window

How to do it…

How it works…

There's more…

Creating a custom dialog

How to do it…

How it works…

9. Configuring and Controlling Tk Widgets

Introduction

Creating a frame widget

How to do it…

How it works…

Creating a label widget

How to do it…

How it works…

Creating an entry widget

How to do it…

How it works…

Creating a button widget

How to do it…

How it works…

Creating a listbox widget

How to do it…

How it works…

Creating an image

Getting ready

How to do it…

How it works…

Creating a simple form

How to do it…

How it works…

10. Geometry Management

Introduction

Controlling layout with the pack command

How to do it...

How it works…

Controlling layout with the grid command

How to do it…

How it works…

Combining pack and grid

How to do it…

How it works…

Creating an address book interface

Getting ready

How to do it…

How it works…

11. Using Tcl Built-in Dialog Windows

Introduction

Displaying a message box

How to do it…

How it works…

Displaying a confirmation dialog

How to do it…

How it works…

Displaying the color picker

How to do it…

How it works…

Displaying the directory dialog

How to do it…

How it works…

Displaying the file selection dialog

How to do it…

How it works…

Selecting a directory and file

How to do it…

How it works…

12. Creating and Managing Menus

Introduction

Creating a menu

How to do it…

How it works…

Adding menu buttons

How to do it…

How it works…

Displaying a pop-up menu

How to do it…

How it works…

Data entry application

How to do it…

How it works…

13. Creating the Address Book Application

Introduction

Creating the Address Book application

How to do it…

How it works…

Adding a record

How to do it…

How it works…

Navigating records

How to do it…

How it works…

Deleting a record

How to do it…

How it works…

Finding a record

How to do it…

How it works…

Full listing

Index