How to use the attrs.BoolAttr function in attrs

"""
	A basic radiobutton (an exclusive checkbox).

	New Attributes
	==============

	  - marked: Boolean: Whether the checkbox is checked or not.
	  - group: String: All RadioButtons with the same group name
	  can only be checked exclusively.

	Data
	====
	The marked status can be read and set via L{distributeData} and L{collectData}
	"""

	ATTRIBUTES = BasicTextWidget.ATTRIBUTES + [BoolAttr('marked'),Attr('group')]

	def __init__(self,group="_no_group_",**kwargs):
		self.real_widget = fife.RadioButton()
		super(RadioButton,self).__init__(**kwargs)

		self.group = group

		# Prepare Data collection framework
		self.accepts_data = True
		self._realGetData = self._isMarked
		self._realSetData = self._setMarked

		# Initial data stuff inherited.

	def _isMarked(self): return self.real_widget.isSelected()
	def _setMarked(self,mark): self.real_widget.setSelected(mark)

"""
	A basic label - displaying a string.

	Also allows text wrapping and onMouse hover callbacks.

	New Attributes
	==============

	 - wrap_text: Boolean: Enable/Disable automatic text wrapping. Disabled by default.
	 Currently to actually see text wrapping you have to explicitly set a max_size with
	 the desired width of the text, as the layout engine is not capable of deriving
	 the maximum width from a parent container.

	"""

	ATTRIBUTES = BasicTextWidget.ATTRIBUTES + [BoolAttr('wrap_text')]

	def __init__(self,wrap_text=False,**kwargs):
		self.real_widget = fife.Label("")
		self.wrap_text = wrap_text
		super(Label,self).__init__(**kwargs)

	def resizeToContent(self):
		self.real_widget.setWidth( self.max_size[0] )
		self.real_widget.adjustSize()
		self.height = self.real_widget.getHeight() + self.margins[1]*2
		self.width  = self.real_widget.getWidth()  + self.margins[0]*2
		#print self.width,self.max_size[0]

	def _setTextWrapping(self,wrapping): self.real_widget.setTextWrapping(wrapping)
	def _getTextWrapping(self): self.real_widget.isTextWrapping()
	wrap_text = property(_getTextWrapping,_setTextWrapping)

# coding: utf-8

class ScrollArea(Widget):
	"""
	A wrapper around another (content) widget.

	New Attributes
	==============

	  - content: The wrapped widget.
	  - vertical_scrollbar: Boolean: Set this to False to hide the Vertical scrollbar
	  - horizontal_scrollbar: Boolean: Set this to False to hide the Horizontal scrollbar

	"""

	ATTRIBUTES = Widget.ATTRIBUTES + [ BoolAttr("vertical_scrollbar"),BoolAttr("horizontal_scrollbar") ]

	def __init__(self,**kwargs):
		self.real_widget = fife.ScrollArea()
		self._content = None
		super(ScrollArea,self).__init__(**kwargs)

	def addChild(self,widget):
		self.content = widget
		widget.parent = self

	def removeChild(self,widget):
		if self._content != widget:
			raise RuntimeError("%s does not have %s as direct child widget." % (str(self),str(widget)))
		# Set a Container here, as this can not be set to None
		# Might be possible to find a better solution, needs peer review
		self.content = Container()