Скачать или смотреть How to Change ttk.Progressbar Colour in Tkinter Without Using Built-in Themes

Learn how to customize your `ttk.Progressbar` widget in Tkinter by changing its color based on progress values, without affecting other UI elements or using built-in themes.
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This video is based on the question https://stackoverflow.com/q/67665999/ asked by the user 'jezza_99' ( https://stackoverflow.com/u/12664040/ ) and on the answer https://stackoverflow.com/a/67668644/ provided by the user 'bangKok' ( https://stackoverflow.com/u/15383711/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Customizing the Color of the ttk.Progressbar in Tkinter

When building graphical user interfaces (GUIs) with Python's Tkinter library, ttk.Progressbar is a commonly used widget for displaying progress. However, developers often face challenges when trying to change the color of the progress bar based on certain conditions, without affecting the overall theme of other widgets. In this post, we will explore how to change the color of your ttk.Progressbar based on progress values, ensuring that the changes are localized to just this widget.

The Challenge: Changing Progressbar Color Without Affecting Other Widgets

When using the ttk.Style() class to modify the appearance of the ttk.Progressbar, many users encounter issues. Specifically, if you create a style that utilizes a theme, it inadvertently alters the appearance of other ttk widgets in your application. However, the goal is to solely change the progress bar's color while retaining the original styles of other widgets.

Example Scenario

Suppose you want to indicate progress in different colors based on defined thresholds. For instance:

0% - 24%: Green

25% - 49%: Blue

50% - 74%: Yellow

75% - 99%: Orange

100%: Red

Solution: Configure a Single Style for Color Changes

Instead of creating multiple styles for each color, you can use a single style and dynamically change its properties based on the current progress value. Here’s how to implement it:

Step 1: Setup Your Tkinter Application

Here is a basic setup that includes a ttk.Progressbar and a label using Tkinter:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Understand the Code

Single Style Configuration: We configured a single style named TProgressbar. As self.progress is created with this style, changing the foreground and background dynamically based on values will only affect the progress bar.

Dynamic Updates: The value method takes a parameter that updates the progress and changes the color of the bar depending on the current progress value.

Conclusion

By using a single style and dynamically adjusting its properties, you can easily customize the color of your ttk.Progressbar in Tkinter without impacting other widgets. This approach not only simplifies your code but also enhances the user interface by visually representing progress through color changes. Whether you're creating a simple application or a more complex GUI, understanding these principles will help you design better user experiences in your Tkinter applications.

Now, you've mastered how to change the color of your progress bar effectively! Happy coding!