Why the Button is not framed on IE?
I need to show the frame when Button is focused without not overriding the onFocus method.
Other some GXT widgets can be framed.
Are there technical problems?

com.extjs.gxt.ui.client.widget.button
Code:
  protected void onFocus(ComponentEvent ce) {
    if (!disabled) {
      addStyleName(baseStyle + "-focus");
      if (GXT.isFocusManagerEnabled() && !GXT.isIE) {
        FocusFrame.get().frame(this); //I need to call this method but isn't called on IE.
      }
    }
  }
com.extjs.gxt.ui.client.widget.layoutcontainer
Code:
 protected void onFocus(ComponentEvent ce) {
    if (GXT.isFocusManagerEnabled() && FocusManager.get().isManaged()) {
      if (getFocusSupport().isIgnore()) {
        for (int i = 0; i < getItemCount(); i++) {
          Component c = getItem(i);
          if (!c.getFocusSupport().isIgnore()) {
            c.focus();
            break;
          }
        }
      } else {
        FocusFrame.get().frame(this); // be called on IE.
      }
    }
  }