Скачать или смотреть Solving the NavigationToolbar Button Highlighting Issue in Matplotlib with PySide6

Learn how to fix the `NavigationToolbar` buttons not highlighting when active in Matplotlib using PySide6, improving user experience in your application.
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This video is based on the question https://stackoverflow.com/q/77758713/ asked by the user 'Hannibal' ( https://stackoverflow.com/u/16750631/ ) and on the answer https://stackoverflow.com/a/77773316/ provided by the user 'Hannibal' ( https://stackoverflow.com/u/16750631/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the NavigationToolbar Button Highlighting Issue in Matplotlib with PySide6

When developing applications with Python, PySide6, and Matplotlib, you may encounter an issue where the buttons on the NavigationToolbar do not highlight when activated. This can lead to confusion for the users, as they cannot visually discern which tool is already active. In this guide, we will explore this problem in detail and provide a clear solution to enhance user experience in your application.

Understanding the Problem

In your application, you have integrated a NavigationToolbar2QT to provide users with tools for navigating through plots. However, when users click on the Pan or Zoom buttons, there is no visual indication that these buttons are actively engaged. This can result in repeated clicking or confusion as users may think the buttons are inactive.

Key Aspects of the Issue:

No Visual Feedback: Users are unable to see that a button has been activated.

User Confusion: Without feedback, users may attempt to click other options, thinking the initial choice was not registered.

Analyzing the Code

Let's take a look at a snippet of your implementation:

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

In your code, the NavigationToolbar is created and customized with new icons; however, the lack of highlighting on active buttons remains an issue.

Identifying the Root Cause

Upon investigation, the root cause can be traced back to the stylesheet configuration applied to QPushButton and QToolButton. Here’s what you initially had:

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

This CSS rule inadvertently affected the highlighting behavior of the toolbar buttons since it applied styles that may remove the default active appearance for QToolButtons.

Implementing the Solution

To resolve this highlighting problem, we recommend removing QToolButton from the stylesheet. By doing so, you allow the NavigationToolbar buttons to revert to their default styling, which does include the expected active highlighting.

Steps to Implement the Fix:

Update the Stylesheet:
Remove QToolButton from the CSS rule and modify the stylesheet as follows:

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

Re-test Your Application:
After updating the stylesheet, run your application and verify that the Pan and Zoom buttons now highlight appropriately when activated.

Conclusion

Addressing the issue of non-highlighting buttons in the NavigationToolbar improves the usability and overall experience for users interacting with your Matplotlib plots in a PySide6 application. By simply adjusting the stylesheet and removing the definition for QToolButton, you can achieve the desired visual feedback for active controls.

By following the steps outlined in this post, you can ensure that users experience less confusion while navigating your application. Remember to regularly check your stylesheets and UI elements to maintain an intuitive interface.

Now, go ahead and enhance your application with this fix! Happy coding!