Make HBox and VBox helper functions

IPython/html/widgets/widget_container.py

@@ -1,65 +1,67 b''
 """Container class.  
 
 Represents a container that can be used to group other widgets.
 """
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 from .widget import DOMWidget
 from IPython.utils.traitlets import Unicode, Tuple, TraitError, Int, CaselessStrEnum
 from IPython.utils.warn import DeprecatedClass
 
 class Container(DOMWidget):
     _view_name = Unicode('ContainerView', sync=True)
 
     # Child widgets in the container.
     # Using a tuple here to force reassignment to update the list.
     # When a proper notifying-list trait exists, that is what should be used here.
     children = Tuple(sync=True, allow_none=False)
 
     def __init__(self, children = (), **kwargs):
         kwargs['children'] = children
         super(Container, self).__init__(**kwargs)
         self.on_displayed(Container._fire_children_displayed)
 
     def _fire_children_displayed(self):
         for child in self.children:
             child._handle_displayed()
 
 
 class Popup(Container):
     _view_name = Unicode('PopupView', sync=True)
     
     description = Unicode(sync=True)
     button_text = Unicode(sync=True)
 
 
 class FlexContainer(Container):
     _view_name = Unicode('FlexContainerView', sync=True)
-    orientation = Unicode('vertical', sync=True)
+    orientation = CaselessStrEnum(values=['vertical', 'horizontal'], default_value='vertical', sync=True)
     flex = Int(0, sync=True, help="""Specify the flexible-ness of the model.""")
     def _flex_changed(self, name, old, new):
         new = min(max(0, new), 2)
         if self.flex != new:
             self.flex = new
 
     _locations = ['start', 'center', 'end', 'baseline', 'stretch']
     pack = CaselessStrEnum(
         values=_locations, 
         default_value='start', allow_none=False, sync=True)
     align = CaselessStrEnum(
         values=_locations, 
         default_value='start', allow_none=False, sync=True)
 
 
-class VBox(FlexContainer):
-    _view_name = Unicode('VBoxContainerView', sync=True)
+def VBox(*pargs, **kwargs):
+    kwargs['orientation'] = 'vertical'
+    return FlexContainer(*pargs, **kwargs)
 
+def HBox(*pargs, **kwargs):
+    kwargs['orientation'] = 'horizontal'
+    return FlexContainer(*pargs, **kwargs)
 
-class HBox(FlexContainer):
-    _view_name = Unicode('HBoxContainerView', sync=True)
 
 ContainerWidget = DeprecatedClass(Container, 'ContainerWidget')
 PopupWidget = DeprecatedClass(Popup, 'PopupWidget')