How to dynamically update content of a CommandContributionItem

[jdneo]

I have a requirement that dynamically update the menu item(CommandContributionItem).

For example, when user opens a menu, the item text is: usage: 1%, and it will fetch the latest usage data from server, and once the data arrive, for example, change it to usage 2%.

What I did is:

1. Update the label of the CommandContributionItem.
2. Call CommandContributionItem.update()

On windows, I can see the label of the item will be updated dynamically. But on Mac, it won't.

Is working on Windows just a coincidence? Or I did it in a wrong way?

[iloveeclipse]

In theory it should work, I don't see anything else that is need to be done if looking at org.eclipse.ui.menus.CommandContributionItem.update(). If you could extract a small self contained example of what you are doing, I could check what happens there and if that would work on Linux. I don't have a Mac access.

[iloveeclipse]

Just a wild guess: could be that % is somehow interpreted by Mac code? Can you try just some innocent string like Usage X percent?

[jdneo]

Tried totally remove %, and still the same. Notice the second time when I open the menu in this video:

Screen.Recording.2025-06-06.at.10.00.40.mov

It's really wired because only the number part is disappear. 😂

[jdneo]

I made a reproduce project using the status bar contribution point, At least it does not work on MacOS. And I find that if the action text contains \t, the text after \t cannot update correctly.
menurefresh.zip

On Windows, it works fine, not sure how it works on Linux.

[iloveeclipse]

So don't use tabs (new lines any other special characters) in menu items. It is definitely not Eclipse but native Mac API issue.

[jdneo]

Updated the code to use spaces since both Mac and Linux does not support \t rendering.