On Thu, 21 Mar 2024 22:06:42 GMT, Marius Hanl <mh...@openjdk.org> wrote:

> In https://github.com/openjdk/jfx/pull/1405, I identified some shortcomings 
> of the stub font implementation. As I don't want to clutter the PR with that, 
> I decided to cherrypick the improvements I did to a new ticket and PR.
> 
> The current implementation has the following shortcomings:
> - It does not reliable detect the System Font, as a consequence, tests in 
> TableColumnHeaderTest.java are failing on my local machine
> - Another consequence of this is, that the font size is always estimated with 
> 0, as it is not detected
> - One shortcoming currently is, that the stub font siie estimate is not 
> considering bold fonts. That would improve writing tests for some scenarios, 
> e.g. for TableColumnHeader, where we would expect that the size of the header 
> is bigger since it is bold
> 
> Some tests were failing for the following reasons:
> - `AreaChartTest.java` - `expected -30.0, was -30.00000000004` - I added 
> ceiling to the data.
> - `StackedBarChartTest.java` - since we now calculate correctly, the path 
> changed
> - A test tried to load `Helvetica`, which is not supported in the stub font 
> loader. I changed it
> - The default System font is considered a `Regular` one (style)
> 
> I wrote tests and documented the stub behaviour.
> I did some minor changes here:
> - System font is now detected, also in bold and italic
> - A bold font will be calculated with a little bit more width (1px). Checkout 
> the test as well for that
> 
> Note: This only changes test setup, no 'production' code.

One more question, for my education, since you are now the expert :-)

I am trying to decide whether I should write a headful test for 
Labeled.truncated, or a headless one will suffice.

If I write a test that uses the StubToolkit, one that requires some kind of 
font metrics - would that work?  Will I get some kind of semi-valid values for 
preferred width of a text (Text, Labeled, etc.), or I cannot really rely on the 
correctness of the StubTextLayout?

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PR Comment: https://git.openjdk.org/jfx/pull/1422#issuecomment-2021428506

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