Eclipse e4 RCP: Core Expressions - Something less XML-hell?

Question

I\'m working on an E4 RCP application, and have a context menu which has menu items visible or not depending on the selection. The way I\'ve found to do this is with core ex

Answer 1

Core expressions are not working for toolbar items, for example. You can use the following workaround in command handlers:

public class SomeHandler {
    protected MToolItem toolItem;

    @CanExecute
    @Inject
    public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION) @Optional ISelection selection)
    {
        boolean canExecute = ...
        setToolItemVisible(canExecute);
        ...
    }

    private void setToolItemVisible(final boolean visible) {
        if (toolItem != null) {
            Display.getDefault().asyncExec(new Runnable() {
                @Override
                public void run() {
                    toolItem.setVisible(visible);
                }
            });
        }
    }
}

where toolItem is retrieved by EModelService