Scope Sub-Controllers

The application main controller creates sub-controllers to control discrete modules.

In a main controller, handle a control and then create a subcontroller to handle the functionality: 

protected void doHandleControl(Control inControl) throws ControlException { 
    if (inControl.matchesID(LAUNCH)) {             
        doLaunch();         
    } else if (inControl.matchesID(NavTreeView.PATIENTSEARCH)) { 
        showPatientSearch();         
    } 
protected void showPatientSearch() { 
    searchcontrol = new PatientSearchController((FoboLauncherView)getView());        
    this.addChild(searchcontrol);        
    searchcontrol.startup(); 
}