Validate initial value of "_BoundedFloatWidget".

IPython/html/widgets/widget_float.py

@@ -1,60 +1,61
 """FloatWidget class.  
 
 Represents an unbounded float using a widget.
 """
 #-----------------------------------------------------------------------------
 # Copyright (c) 2013, the IPython Development Team.
 #
 # Distributed under the terms of the Modified BSD License.
 #
 # The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 from .widget import DOMWidget
 from IPython.utils.traitlets import Unicode, CFloat, Bool, Enum
 
 #-----------------------------------------------------------------------------
 # Classes
 #-----------------------------------------------------------------------------
 class _FloatWidget(DOMWidget):
     value = CFloat(0.0, help="Float value", sync=True) 
     disabled = Bool(False, help="Enable or disable user changes", sync=True)
     description = Unicode(help="Description of the value this widget represents", sync=True)
 
 
 class _BoundedFloatWidget(_FloatWidget):
     max = CFloat(100.0, help="Max value", sync=True)
     min = CFloat(0.0, help="Min value", sync=True)
     step = CFloat(0.1, help="Minimum step that the value can take (ignored by some views)", sync=True)
 
     def __init__(self, *pargs, **kwargs):
         """Constructor"""
         DOMWidget.__init__(self, *pargs, **kwargs)
+        self._validate('value', None, self.value)
         self.on_trait_change(self._validate, ['value', 'min', 'max'])
 
     def _validate(self, name, old, new):
         """Validate value, max, min."""
         if self.min > new or new > self.max:
             self.value = min(max(new, self.min), self.max)
 
 
 class FloatTextWidget(_FloatWidget):
     _view_name = Unicode('FloatTextView', sync=True)
 
 
 class BoundedFloatTextWidget(_BoundedFloatWidget):
     _view_name = Unicode('FloatTextView', sync=True)
 
 
 class FloatSliderWidget(_BoundedFloatWidget):
     _view_name = Unicode('FloatSliderView', sync=True)
     orientation = Enum([u'horizontal', u'vertical'], u'horizontal', 
         help="Vertical or horizontal.", sync=True)
     readout = Bool(True, help="Display the current value of the slider next to it.", sync=True)
 
 
 class FloatProgressWidget(_BoundedFloatWidget):
     _view_name = Unicode('ProgressView', sync=True)