Update FlatLaf from 1.6.1 to 2.0

[DevCharly]

Update FlatLaf to v2: https://github.com/JFormDesigner/FlatLaf/releases/tag/2.0

There are (nearly) no visual differences compared to previous used version, except the slightly changed check boxes and radio buttons.

The main benefits of FlatLaf v2 for NetBeans are the reworked core themes (easier changing colors), the possibility to change the accent color and the FlatLaf Theme Editor. This should it make it relative easy to change colors/style of the light and dark themes to differentiate more from IntelliJ IDEA look.

E.g. adding following to platform/o.n.swing.laf.flatlaf/src/org/netbeans/swing/laf/flatlaf/FlatLightLaf.properties

@background = #f3f3f3
@accentColor = #007aff

would change the look to (blue accent color; background minimally lighter):

Or adding following to platform/o.n.swing.laf.flatlaf/src/org/netbeans/swing/laf/flatlaf/FlatDarkLaf.properties

@background = #333
@foreground = #c4c4c4
@accentColor = darken(#007aff,5%)

Button.default.foreground = #ddd

would make NetBeans darker and give text more contrast:

Not sure how to "organize" work/ideas on such theme changes...
Maybe create two "Draft PRs" (for light and dark) where interested people can comment and add commits?

[mbien]

nice!

Regarding the theme adjustments and feedback: You could combine a draft PR with a forum thread since its probably easier to post images there compared to mailing lists.

[neilcsmith-net]

+1 Nice!

Putting NB13 milestone on this.

Now just need to convince @eirikbakke of the merits of CSS styling SVG icons to pick up the accent colour! 😄

[eirikbakke]

Great to hear of the FlatLAF 2.0 release!

(@neilcsmith-net My NetBeans Platform app actually uses accent colors already! Except prior to FlatLAF 2.0, I had to set 80 different FlatLAF properties for this. The main reason I don't try to do it with icons is because the existing NetBeans icon style is multi-colored, and not duotone.)

[neilcsmith-net]

@eirikbakke at no point have I suggested switching to duotone icons in order to integrate with this change! You keep saying I have. Let's leave the practicalities of that discussion on dev@, but let's also tie in to what @DevCharly says about organizing ideas on theme changes.

[eirikbakke]

@neilcsmith-net Yeah, sorry, we can continue the thread on dev... :-)

[mbien]

this seems to be a fairly uncontroversial lib update, lets merge this for NB13.