Enhancements for JavaFX 18

[Ty Young]

You want a list of bugs that could be fixed? Today's your lucky day!


* Resizing a JavaFX window under Linux (still) causes graphical 
glitches, needing -Dprism.forceUploadingPainter=true or, IIRC, software 
rendering to "fix".


* Resizing ALSO causes graphical glitching on the bottom and right sides 
on both Windows AND Linux.


* Resizing an app with a TableView in view results in the TableView's 
integrated scrollbars flickering in and out of existence when there is 
plenty of space left. The less UI content there is, the less this is 
likely to happen - but it absolutely does happen with *just* a TableView 
as the root node, you gotta play with it.


* Resizing the application from the left causes UI jitter.


* JavaFX in general seems to have trouble keeping up with user resizing. 
Rapidly resizing an application with a DividerPane(TreeView left, 
content right) results in inconsistent positioning than if it was done 
slowly, in the very least.


* Alt tabbing with a UI component being selected(Slider thumb, 
scrollbar) results in that component's color being stuck in whatever 
color is the CSS selected state.


* You can middle and right click drag a slider thumb and scroll bars, 
which does not trigger a CSS state change, which is not consistent with 
MenuBar items.


* JavaFX does not seem to calculate the size of a GridPane or TilePane 
with elements correctly. This results in content in ScrollPanes that is 
clearly larger in height than the viewport but ScrollPane does not show 
its scrollbars - only mouse wheel works without forcing the scrollbars 
to always show or transition state bugs when putting a GridPane/TilePane 
inside a TitlePane(or maybe it's TilePane -> TitlePane -> TilePane 
that's the issue? No clue.)


* XY Chart data that is off screen (-1, -1) has lines drawn to them 
despite being... off screen. Bug or feature?


* Setting the Y axis side to Side.RIGHT causes a white space with custom 
CSS: https://imgur.com/a/4P1Oj1Q.


Might be missing some.


A few features, while I'm here:


* API property to force a TableView's height to be the exact amount 
needed to display its headers and all its rows.


* API to disable TableView's scrollbars completely.


* A late "showing" property for when the application has been shown to 
the user and all first viewing UI components have had their sizes 
calculated and are being displayed, if it doesn't exist already and I'm 
completely blind.


On 7/30/21 7:56 AM, Kevin Rushforth wrote:
> Now that JavaFX 17 is in RDP2, we can turn more attention to bug fixes 
> and enhancement requests for JavaFX 18. It's the summer, so there may 
> be delays as some people are out at various times (including me), but 
> I would like to get some of the outstanding enhancement requests 
> moving over the next few weeks.
>
> Specifically, I'd like to see the following proceed:
>
> * Transparent backgrounds in WebView
> JBS: https://bugs.openjdk.java.net/browse/JDK-8090547
> PR: https://github.com/openjdk/jfx/pull/563
>
> * Add DirectionalLight
> JBS: https://bugs.openjdk.java.net/browse/JDK-8234921
> PR: https://github.com/openjdk/jfx/pull/548
>
> * CSS pseudoclasses :focus-visible and :focus-within
> https://bugs.openjdk.java.net/browse/JDK-8268225
> PR: https://github.com/openjdk/jfx/pull/475
>
> * Improve property system to facilitate correct usage (minus the 
> binary incompatible API change)
> JBS: https://bugs.openjdk.java.net/browse/JDK-8268642
> PR: https://github.com/openjdk/jfx/pull/590 (Draft)
>
> And maybe the following:
>
> * Add CSS themes as a first-class concept (need a consensus on how to 
> proceed)
>
> * Undecorated interactive stage style (still in early discussion, but 
> the concept looks interesting and useful)
>
> There are probably others I'm forgetting.
>
> Each of the above should be discussed in their own thread on 
> openjfx-dev rather than a reply to this thread.
>
> -- Kevin
>
>