On Wed, 26 Mar 2025 19:57:59 GMT, John Hendrikx <jhendr...@openjdk.org> wrote:
>> modules/javafx.controls/src/main/java/javafx/scene/control/skin/TitledPaneSkin.java
>> line 160:
>>
>>> 158: registerChangeListener(titleRegion.alignmentProperty(), e ->
>>> pos = titleRegion.getAlignment());
>>> 159:
>>> 160: // NOTE: Listening to two different alignment properties, and
>>> using the last value of either is likely a bug!
>>
>> I agree: it is definitely a bug. I think we should remove it along with the
>> possibility of specifying conflicting alignment via CSS. The control must
>> be in control.
>
> Yeah, the reason I was hesitant to change this is that currently you can set
> the alignment from CSS in two ways:
>
> .titled-pane {
> -fx-alignment: RIGHT;
> }
>
> Or:
>
> .titled-pane > .title {
> -fx-alignment: RIGHT;
> }
>
> Both will work at the moment. I'm not sure which one is more correct.
>
> A titled pane naturally has two major regions; its title area, and its
> content area. The top level alignment could apply to either or none in
> theory. The top level alignment setting is "inherited" from being a Labeled
> control, which only has a single alignment to worry about (this also shows
> using this kind of inheritance is just a bad idea). It would have been much
> more clear to have a `titleAlignment` and `contentAlignment` property.
>
> At the "top" level there is nothing to align, since a titled pane always fill
> its width.
the original code had some logic around `(pos == null)`, I wonder if we need to
do the same here, that is, derive the effective alignment from both values?
-------------
PR Review Comment: https://git.openjdk.org/jfx/pull/1742#discussion_r2014933886
