G-Split Fails On Mobile Portrait: A Fyne UI Bug?

Hey everyone! 👋 We've got a bit of a head-scratcher today involving Fyne and its HSplit functionality, especially when it comes to mobile devices in portrait mode. It seems like there's a bug where the HSplit doesn't behave quite as expected, leaving users with a less-than-ideal experience. Let's dive into the details, explore the issue, and see if we can understand what's going on.

The Core of the Problem: G-Split in Portrait Mode

So, the main issue revolves around the HSplit widget within the Fyne framework. The original poster is experiencing problems with how this widget functions on mobile devices, specifically when the device is in portrait mode. The core expectation is that the user should be able to freely move the splitter to adjust the relative sizes of the split content. However, in this case, it doesn't seem to be working as intended. The splitter doesn't allow the user to adjust the size, making the application difficult to use. It seems the core problem is that the splitter is not draggable or responsive, which hinders the usability and affects the overall user experience. This leads to a bug where users are unable to interact with the split panels as they should. The user is expecting to be able to dynamically resize the sections, which is a fundamental aspect of the HSplit component and essential for creating adaptable UI layouts. Let's look further into the app and see what's happening. The poster of the issue provides a link to their app built with Fyne, and we can see what's really happening. The app displays small tree components, which, in portrait mode, don't allow the user to move the splitter. The user had to force a minimum width, making the UI look a bit awkward and not very user-friendly.

Reproducing the Issue and Seeing the Code

The user's report is clear: the HSplit widget's expected behavior doesn't match the actual behavior on a mobile device in portrait mode. They've helpfully pointed us to their app, hosted on GitHub (https://github.com/bytemystery-com/vboxssh), to demonstrate the problem firsthand. This is a crucial step in the debugging process because it allows anyone to examine the code and try to reproduce the issue. By reviewing the code, developers can pinpoint where the behavior deviates from the intended design and then determine the root cause of the bug. It also helps determine whether the issue is with the code or the library.

To reproduce this, you'd typically run the application on an Android device or emulator and then observe how the HSplit behaves when the device is in portrait orientation. The expectation is that you should be able to drag the splitter, but in this scenario, it doesn't function as intended. This process of reproduction is extremely important, as it helps determine what is the root cause of the problem. This user's experience helps pinpoint a specific Fyne component and its behavior.

Diving into the Details: Fyne, Version, and More

Now, let's look at some important specifics. The app in question is built using Fyne version 2.7.2. The Go compiler version used is 1.25. The operating system in question is Android. These details are important as they help narrow down the potential causes of the bug. The framework, the compiler, and the operating system can all interact in unexpected ways. Knowing the versions ensures that any identified issues can be reproduced within the same environment. This helps in pinpointing whether the problem is specific to a particular version or environment.

The Importance of the Checklist

The original post includes a checklist, which is a great practice when reporting issues. It confirms that the user searched the issue tracker for related problems before opening a new one. It also states that the issue is related to a single bug, which helps maintain clarity. This is super helpful when trying to fix the problem.

Potential Causes and Workarounds

Without diving directly into the code, we can speculate on potential causes and discuss some possible workarounds. It's possible that the HSplit implementation might have some issues with handling touch events correctly on mobile devices, especially in portrait mode. This can happen due to the differences between how desktop applications and mobile applications handle touch gestures. Another potential issue is how the layout is calculated. If the layout logic doesn't correctly account for the screen size and orientation, the HSplit might not render correctly, or the splitter handles might not be positioned to allow user interaction. Also, there might be problems with the event handling itself. The Fyne framework may not be correctly processing the touch events to allow the user to move the splitter. The input events on the mobile devices may not be handled correctly.

Workarounds

While we don't know the exact solution without debugging, here are a few possible workarounds that the user or others could try:

• Manual Sizing: Instead of relying on the splitter, you could try using buttons or other UI elements to manually adjust the sizes of the split panels. This offers a way to resize the content without the splitter. It can be implemented, but it could make the UI feel less interactive.
• Orientation-Specific Layout: You could detect the device orientation and use a different layout, such as a vertical or horizontal layout. If the app detects a portrait orientation, it could automatically switch to an alternative layout. This offers an improved layout for mobile users.
• Custom Splitter Implementation: If the issue is with the built-in HSplit, you could consider creating a custom splitter widget that handles touch events more effectively. However, this is more work, but gives more control to the developer. You could rewrite the splitter to solve the problem by creating a better user experience.

Conclusion: Addressing the G-Split Bug

So, it seems we have a genuine bug with the HSplit widget when used on mobile devices in portrait mode. The user reported that they can't move the splitter. This leads to a less-than-ideal user experience. To solve this, a lot more investigation is required. The details provided by the user, including the application code and the environment details, will be crucial. Fixing this bug will require diving into the Fyne framework code and identifying where the touch events or layout calculations are going wrong. With this information, the issue can be fixed and give the user a much better experience.

If you're facing a similar problem, be sure to provide clear details, like the version of Fyne you're using, the operating system, and any relevant code snippets. This will help the developers fix the problem. The goal is to make Fyne even more user-friendly and reliable for everyone!