app.py 文件源码

def help(self):
        if not hasattr(self.frame.body, 'help'):
            return
        global_help = self.getGlobalHelp()
        parts = [('Global Keys', global_help),
                 ('This Screen', self.frame.body.help())]
        keylen = 0
        for title, items in parts:
            for cmd, keys, text in items:
                keylen = max(len(keys), keylen)
        text = ''
        for title, items in parts:
            if text:
                text += '\n'
            text += title+'\n'
            text += '%s\n' % ('='*len(title),)
            for cmd, keys, cmdtext in items:
                text += '{keys:{width}} {text}\n'.format(
                    keys=keys, width=keylen, text=cmdtext)
        dialog = mywid.MessageDialog('Help for %s' % version(), text)
        lines = text.split('\n')
        urwid.connect_signal(dialog, 'close',
            lambda button: self.backScreen())
        self.popup(dialog, min_width=76, min_height=len(lines)+4)