How would one use IDecorationContext api from Eclipse JFace

Question

Is there an example out there for using IDecorationContext for label decorations?

By the looks of it, IDecorationContext class seems to pro

Answer 1

I did not use IDecorationContext, but you can see it used in org.eclipse.jface.viewers.LabelDecorator.

It is also discussed in this thread (even if there are no answer, that can at least give you a starting point)

My current approach is to extend org.eclipse.ui.decorators using a ILightweightLabelDecorator to add a replace overlay to the respective icons:

public class ProjectLabelDecorator extends LabelProvider 
   implements ILightweightLabelDecorator {

   ...

   public void decorate(Object element, IDecoration decoration) {
      if (element instanceof IFolder) {
         IFolder folder = (IFolder) element;
     try {
            if (folder.getProject().hasNature("rttdt.nature")) {
                if (ProjectNature.isTestcase(folder)) {
                   IDecorationContext context = 
                      decoration.getDecorationContext();
                   if (context instanceof DecorationContext) {
                      ((DecorationContext) context).putProperty(
                         IDecoration.ENABLE_REPLACE, Boolean.TRUE);
                   }
                   decoration.addOverlay(fTestcaseOverlay,
                      IDecoration.REPLACE);
                }
         } catch (CoreException e) {
         }
      }
   }

   ...
}