Cell text rotation event handler

def OnCellTextRotation(self, event):
        """Cell text rotation event handler"""

        with undo.group(_("Rotation")):
            self.grid.actions.toggle_attr("angle")

        self.grid.ForceRefresh()

        self.grid.update_attribute_toolbar()

        if is_gtk():
            try:
                wx.Yield()
            except:
                pass

        event.Skip()