Скачать или смотреть Resolving the Stage Resizing Issue in JavaFX

Discover how to fix the white gap when resizing a `Stage` in JavaFX with a step-by-step approach to ensure your application looks seamless.
---
This video is based on the question https://stackoverflow.com/q/67297392/ asked by the user 'Meet Shah' ( https://stackoverflow.com/u/15109867/ ) and on the answer https://stackoverflow.com/a/67314503/ provided by the user 'wollsi' ( https://stackoverflow.com/u/15771280/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Stage: Not resizing to Scene

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Resolving the Stage Resizing Issue in JavaFX: A Complete Guide

When working with JavaFX applications, you may encounter an annoying problem where the size of your Stage does not match the expected size of your Scene. This often results in unwanted white gaps, particularly on the right edge of the window, leading to a less polished user experience.

In this guide, we will explore a common issue faced by developers regarding the size mismatch between a Stage and its Scene, and we'll provide a straightforward solution to eliminate those pesky white gaps.

The Problem

Imagine you have a JavaFX scene that is 337.0 pixels wide. However, when you set it on a stage, you notice that the stage width reads 337.6 pixels. This discrepancy can be visually frustrating as it creates an unwanted white line on the edge of your application window.

Attempts to Solve the Issue

You might have tried several approaches such as:

Using stage.sizeToScene() method, which did not work.

Setting the stage width manually with stage.setWidth(337) or stage.setWidth(337.0), both of which seemed to have no effect as the stage width remained at 337.6 pixels.

Hiding and showing the stage again with stage.hide(); stage.show(); which did remove the white line, but resulted in an undesirable window switch animation.

The Solution: Setting Minimum Width and Height

While the above methods may have proven ineffective, there is a recommended solution that has helped many developers overcome this issue effectively. It involves setting the stage’s minimum width and height directly from the new scene you are trying to display.

Implementation Steps

Here’s a breakdown of how to implement this solution:

Set Minimum Width and Height:
You should adjust the stage's minimum width and height according to the scene’s root node properties. Use the following code:

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

Method for Setting Active Scene:
It is helpful to wrap this logic into a method that manages changing the active scene. Here’s an example method:

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

Make sure that the stage.show() method has been called at least once to initialize the stage before invoking this method.

Why This Works

By setting the minimum dimensions of the stage directly from the scene’s root node, you effectively ensure that the stage can adjust its size accurately. This adjustment helps in eliminating any gaps that may appear due to the inherent properties of Scene and Stage.

Conclusion

No developer wants their applications to have unpolished gaps or display issues. By applying the aforementioned solution—setting minimum width and height based on the scene—you can maintain a professional appearance in your JavaFX applications without disruptive window switches.

If you encounter similar issues while developing with JavaFX, give this solution a try, and your Stage should resize accurately, providing a seamless experience for your users!

Feel free to share your experiences or questions in the comments section below!