Book Image

Python GUI Programming with Tkinter.

By : Alan D. Moore
Book Image

Python GUI Programming with Tkinter.

By: Alan D. Moore

Overview of this book

Tkinter is a lightweight, portable, and easy-to-use graphical toolkit available in the Python Standard Library, widely used to build Python GUIs due to its simplicity and availability. This book teaches you to design and build graphical user interfaces that are functional, appealing, and user-friendly using the powerful combination of Python and Tkinter. After being introduced to Tkinter, you will be guided step-by-step through the application development process. Over the course of the book, your application will evolve from a simple data-entry form to a complex data management and visualization tool while maintaining a clean and robust design. In addition to building the GUI, you'll learn how to connect to external databases and network resources, test your code to avoid errors, and maximize performance using asynchronous programming. You'll make the most of Tkinter's cross-platform availability by learning how to maintain compatibility, mimic platform-native look and feel, and build executables for deployment across popular computing platforms. By the end of this book, you will have the skills and confidence to design and build powerful high-end GUI applications to solve real-world problems.
Table of Contents (23 chapters)
Title Page
Copyright and Credits
Packt Upsell

Automating input

Preventing users from entering bad data is one way to help users enter better data; another approach is to automate. Using our understanding of how the forms are likely to be filled out, we can insert values that are very likely to be correct for certain fields.

Remember from Chapter 2, Designing GUI Applications with Tkinter, that the forms are nearly always recorded the same day that they're filled out, and that they're filled out one at a time from Plot 1 to Plot 20 in order. Also remember that the Date, Lab, and Technician values remain the same for each form which is filled in. Let's automate this for our users.

Inserting a date

Inserting the current date is an easy place to start. The place to do this is in the DataRecordForm.reset() method, which sets up the form for entering a new record.

Update that method as follows:

    def reset(self):
        """Resets the form entries"""

        # clear all values
        for widget in self.inputs.values():