Re: Building with Qt depends on pkg-config, Qt 5 term doesn't work on OS X

[Ethan A M. <sf...@us...>]

On Monday, 24 February, 2014 21:12:17 Bastian Märkisch wrote:
> >> gnuplot> plot sin(x)
> >> QIODevice::write: device not open
> >> QIODevice::write: device not open
> 
> The reason for these is the section below in qt_graphics(). The first 
> time it is called the qt->socket is not yet open and thus the call to 
> qt_flushOutBuffer will fail:
> 
>         qt->out << GEDesactivate;
>         qt_flushOutBuffer();
>         qt_connectToServer();
> 
> Adding this snippet to qt_flushOutBuffer() solves that problem:
> 
>         if (!qt || !qt->socket.isValid())
>                 return;
> 
> But maybe the order of commands in qt_graphics() should be changed instead.

I think the order is correct.  It wants to flush and close any previous
connection before starting a new one.   The message comes when
there was no previous connection.  

Curiously, I see these warnings on some machines but not others.
I've no idea why.  But your check in qt_flushOutBuffer() looks correct.
	
	Ethan

>    Bastian
>