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