RFR: 6513512: MetalLookAndFeel.initClassDefaults does not install an entry for MetalMenuBarUI

[Sergey Bylokhov]

On Tue, 13 Dec 2022 09:56:47 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

> Spec for [MetalLookAndFeel](https://github.com/openjdk/jdk/blob/master/src/java.desktop/share/classes/javax/swing/plaf/metal/MetalLookAndFeel.java#L247)
> says:
> "...MetalLookAndFeel registers an entry for each of the classes
> in the package javax.swing.plaf.metal that are named MetalXXXUI.
> The string XXX is one of Swing's uiClassIDs. For the uiClassIDs
> that do not have a class in metal, the corresponding class in
> javax.swing.plaf.basic is used. For example, metal does not
> have a class named "MetalColorChooserUI", as such,
> javax.swing.plaf.basic.BasicColorChooserUI is used".
> 
> There is class MetalMenuBarUI, but the method populates given defaults table with the value
> "javax.swing.plaf.basic.BasicMenuBarUI".
> 
> Added entry for MetalMenuBarUI..
> CI tests including JCK tests are ok.

Probably we should follow this suggestion from the JBS:
> This class is only appropriate for Ocean. The spec needs to be updated to mention this.

src/java.desktop/share/classes/javax/swing/plaf/metal/MetalLookAndFeel.java line 276:

> 274:                     "LabelUI", metalPackageName + "MetalLabelUI",
> 275:                   "MenuBarUI", metalPackageName + "MetalMenuBarUI",
> 276:        "PopupMenuSeparatorUI", metalPackageName + "MetalPopupMenuSeparatorUI",

I think it is installed by the Ocean theme, which is used by the Metal L&F by default.

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PR: https://git.openjdk.org/jdk/pull/11646