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Re: How to make a tkinter GUI work on top of a CUI program?

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  Re: How to make a tkinter GUI work on top of a CUI program? Beinan Li <li.beinan@gmail.com> - 2014-01-04 11:29 -0500

#63136 — Re: How to make a tkinter GUI work on top of a CUI program?

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Thank you so much Jerry.
I should have read though the man page more carefully.
The available online cscope tutorials never mentioned the line-oriented
mode.



On Sat, Jan 4, 2014 at 1:35 AM, Jerry Hill <malaclypse2@gmail.com> wrote:

> On Fri, Jan 3, 2014 at 9:44 PM, Beinan Li <li.beinan@gmail.com> wrote:
> > But some console programs have their own shell or ncurse-like CUI, such
> as
> > cscope.
> > So I figured that I need to first subprocess.popen a bidirectional pipe
> and
> > send command through stdin and get results from stdout and stderr.
> >
> > But in such a case I found that communicate('cmd') will freeze.
>
> Right.  communicate() waits for the subprocess to end, and the
> subprocess is still waiting for you to do something.  Instead, you'll
> need to read() and write() to the subprocess' stdin and stdout
> attributes, probably something like this (untested):
>
> def OnClickBtn(self, event):
>     print('OnClickBtn')
>     self.subProc.stdin.write('symbolName\n')
>     print(self.subProc.stdout.read())
>
> It looks like cscope has both a screen-oriented mode and a line-based
> mode.  When you're working with a subprocess like this, you're going
> to want to be in the line-based mode, so you'll probably want to add
> -l or -L to your command line.
>
> --
> Jerry
>

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