Toogle the ToolButtonStyle of the given button between :data:`ToolButtonIconOnly` and :data:`ToolButtonTextBesideIcon`

        :param button: a tool button
        :type button: :class:`QtGui.QToolButton`
        :returns: None
        :rtype: None
        :raises: None

def toggle_tbstyle(self, button):
        """Toogle the ToolButtonStyle of the given button between :data:`ToolButtonIconOnly` and :data:`ToolButtonTextBesideIcon`

        :param button: a tool button
        :type button: :class:`QtGui.QToolButton`
        :returns: None
        :rtype: None
        :raises: None
        """
        old = button.toolButtonStyle()
        if old == QtCore.Qt.ToolButtonIconOnly:
            new = QtCore.Qt.ToolButtonTextBesideIcon
        else:
            new = QtCore.Qt.ToolButtonIconOnly
        button.setToolButtonStyle(new)