Add support for float numbers (positive & negative) in the z-index style property

[maxkfranz]

Cross-references to related issues. If there is no existing issue that describes your bug or feature request, then create an issue before making your pull request.

Associated issues:

• Add support for float numbers in the z-index style property #3160

Notes re. the content of the pull request. Give context to reviewers or serve as a general record of the changes made. Add a screenshot or video to demonstrate your new feature, if possible.

• Revise z-index property to use a nonNegativeNumber type rather than nonNegativeInt.
• Revise documentation accordingly.
• N.b. this does not change the non-negative constraint on the z-index values.
• This has been manually verified on the debug page.

Checklist

Author:

• The proper base branch has been selected. New features go on unstable. Bug-fix patches can go on either unstable or master.
• N/A : Automated tests have been included in this pull request, if possible, for the new feature(s) or bug fix. Check this box if tests are not pragmatically possible (e.g. rendering features could include screenshots or videos instead of automated tests).
• The associated GitHub issues are included (above).
• Notes have been included (above).

Reviewers:

• All automated checks are passing (green check next to latest commit).
• At least one reviewer has signed off on the pull request.
• For bug fixes: Just after this pull request is merged, it should be applied to both the master branch and the unstable branch. Normally, this just requires cherry-picking the corresponding merge commit from master to unstable -- or vice versa.

[maxkfranz]

@d2fong, I've attached a build you can test in Cyweb:

build.zip

[d2fong]

thanks I'll test it out.

[d2fong]

@maxkfranz Is it possible to also support negative numbers? Like -1.0, -1.1?

[maxkfranz]

@maxkfranz Is it possible to also support negative numbers? Like -1.0, -1.1?

What's the expected behaviour for a negative number in Cyweb?

The behaviour of z-index in CSS proper is complex for negative values: https://stackoverflow.com/questions/33217407/css-negative-z-index-what-does-it-mean

[d2fong]

I would assume that -1.0 would be rendered over -1.1 but let me double check with the cytoscape group.

[maxkfranz]

@d2fong, I've removed the restriction on negative numbers in eff8c8c.

Let me know if you run into any issues with it. Otherwise, let's get this merged for CyWeb.

[d2fong]

Hi Max, its working well. Thank you.