def new_tab(self,x=None):
if self.tabs:
previous_tab = self.current_tab()
current_folder = previous_tab.get_current_folder()
else:
current_folder = os.curdir
tab = Tab(self.notebook,self.statusbar,current_folder)
self.tabs.append(tab)
self.notebook.set_current_page(len(self.tabs)-1)
tab.focus()
#reset the flag to indicate that we no longer
#have just the original "New Document" tab
self.only_first_tab = 0
