DefaultTreeModel and Wicket Tree: setAsksAllowsChildren doesn't work

Question

I\'m using Wicket\'s Tree component in a web app. But empty folders are shown in a file-way. Just like this:

Answer 1

You can override Folder.getStyleClass to return the desired Icon. I got something like this:

@Override
protected String getStyleClass() {
    String styleClass;
    if (isFolder(getModelObject()))
        {
            if (tree.getState(matter) == State.EXPANDED)
                 {
                     styleClass = getOpenStyleClass();
                 } else {
                     styleClass = getClosedStyleClass();
                 }
             } else {
                 styleClass = getOtherStyleClass(matter);
             }

             if (isSelected()) {
                 styleClass += " " + getSelectedStyleClass();
             }

             return styleClass;
        }

Your implementation of isFolder() may vary.