def __init__(self, min_size=(0, 0), max_size=(9999, 9999), border_size=1,
**kwargs):
self._min_size = min_size
self._max_size = max_size
self.views = {}
tab_bar = HBox(name='tabBar')
tab_bar.min_size = (0, 20)
tab_bar.max_size = (9999, 20)
self.view = ScrollArea(name='view')
self.view.min_size = self._min_size
self.view.max_size = self._max_size
self.view.border_size = border_size
frame = VBox(name='frame')
frame.border_size = border_size
frame.opaque = 0
frame.addChild(self.view)
VBox.__init__(self, **kwargs)
self.padding = 0
VBox.addChild(self, tab_bar)
VBox.addChild(self, frame)
self.adaptLayout()
