[Qt-interest] Former Console App on Windows No Longer Shows Text

[Harri Pasanen]

Wasn't their someone proposing a patch relating to this sometime this spring 
on this very mailing list?


Harri
http://mpaja.com/

Friday, July 15, 2011 03:50 pm 
K. Frank writes:
> Hello William!
> 
> On Thu, Jul 14, 2011 at 2:07 PM, William Gordon Rutherdale (rutherw)
> 
> <rutherw at cisco.com> wrote:
> > Hi.
> > ...
> > It was originally a console app.  However, I needed to add a control
> > button, so I added minor gui control to it.  I thus took out the 'QT -=
> > gui' line from the .pro file and added some buttons.
> 
> I'm guessing, as you see, that activating the gui removes support for the
> console by default.
> 
> > The old version had command-line help and other console output, e.g.
> > when you run it with the -h switch.  This console output was produced
> > using qDebug().
> > 
> > The new version still does that on Linux.  However, when it runs on
> > Windows the console output has disappeared.
> > 
> > Is there any way to get it to put this output onto the console when it
> > is running under Windows?
> 
> I believe you can get your console window back if you add something like:
> 
>    CONFIG += console
> 
> to your .pro file.
> 
> I don't understand exactly how this works.  (For example, you seem to be
> working with the QT configuration variable, and I use the CONFIG variable.
> Also, there seems to be some kind of "automatic" default behavior going
> on in that leaving "gui" active turns off the console unless you explicitly
> turn it back on.)
> 
> In my typical use case I launch my Qt gui applications from the command
> line.  (I like to set up certain paths and other environment variables.) 
> In my case, then, setting "CONFIG += console" sets up Qt console output so
> that it appears in the command prompt from which I started the
> application.
> 
> I *think* (on windows) that if you add "CONFIG += console" to a gui
> project, and then launch the application from, e.g., the start menu, Qt /
> windows will automatically create a console window for you in which your
> console output will appear.
> 
> Anyway, you *can* get console output with a Qt gui application on windows.
> Try out the above, and if it doesn't work, post back with some more detail,
> and I'll see if I can sort through what I've done and get it to work for
> you.
> 
> > -Will
> 
> Good luck.
> 
> 
> K. Frank
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