StageStyle.EXTENDED with transparent background

[Dirk Lemmermann]

I am very much interested in this, too. I currently do not need it but I had projects in the past where I wished this feature had been available. I am confident this wish will resurface again at some point in time. It’s one more of those features that will make it possible for JavaFX developers to build apps that can compete with more native UI frameworks.

Dirk

> Am 21.10.2025 um 05:00 schrieb Glavo <zjx001202 at gmail.com>:
> 
> Is anyone interested in this question?
> 
> On Wed, Oct 15, 2025 at 10:21 PM Glavo <zjx001202 at gmail.com <mailto:zjx001202 at gmail.com>> wrote:
>> Hi,
>> 
>> Our application has traditionally used StageStyle.TRANSPARENT to enable a fully customizable stage. 
>> This allows users to set custom backgrounds and adjust the window's opacity freely, leveraging our powerful personalization features.
>> 
>> After the release of JavaFX 25, we want to migrate to StageStyle.EXTENDED so that 
>> we can use native window decorations and no longer need to draw window shadows ourselves.
>> But using StageStyle.EXTENDED creates a stage with a white background, which prevents us 
>> from setting the window's opacity.
>> So is there any way we can make the stage background transparent while using StageStyle.EXTENDED?
>> 
>> Glavo

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