old_contents: # Copyright 2006 James Tauber and contributors
  # Copyright (C) 2009 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  from pyjamas import DOM
  from pyjamas import Factory
  
  from SimplePanel import SimplePanel
  from Focus import FocusMixin
  from pyjamas.ui import Focus
  
  from ClickListener import ClickHandler
  from KeyboardListener import KeyboardHandler
  from FocusListener import FocusHandler
  from MouseListener import MouseHandler
  
  class FocusPanel(SimplePanel, FocusHandler, KeyboardHandler,
                            MouseHandler, ClickHandler,
                            FocusMixin):
  
      def __init__(self, child=None):
  
          SimplePanel.__init__(self, Focus.createFocusable())
  
          FocusHandler.__init__(self)
          KeyboardHandler.__init__(self)
          ClickHandler.__init__(self)
          MouseHandler.__init__(self)
  
          if child:
              self.setWidget(child)
  
  Factory.registerClass('pyjamas.ui.FocusPanel', FocusPanel)
  
  
new_contents: # Copyright 2006 James Tauber and contributors
  # Copyright (C) 2009 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  from pyjamas import DOM
  from pyjamas import Factory
  
  from SimplePanel import SimplePanel
  from Focus import FocusMixin
  from pyjamas.ui import Focus
  
  from ClickListener import ClickHandler
  from KeyboardListener import KeyboardHandler
  from FocusListener import FocusHandler
  from MouseListener import MouseHandler
  
  class FocusPanel(SimplePanel, FocusHandler, KeyboardHandler,
                            MouseHandler, ClickHandler,
                            FocusMixin):
  
      def __init__(self, **kwargs):
          """ pass in Widget={the widget} so that Applier will call setWidget.  
          """
  
          FocusHandler.__init__(self)
          KeyboardHandler.__init__(self)
          ClickHandler.__init__(self)
          MouseHandler.__init__(self)
  
          SimplePanel.__init__(self, Focus.createFocusable(), **kwargs)
  
  Factory.registerClass('pyjamas.ui.FocusPanel', FocusPanel)
  
  
subject: simplify FocusPanel, rely on use Applier to call setWidget.