Hi,

On Tue, 19 Oct 1999 pbrown@redhat.com wrote:

> Does everyone know how when you use x11amp/xmms, the second time you try
> to fire one up, it simply passes the command line arguments you give to
> the running instance and returns?  How about how kdehelp knows how to open
> a new window when you try and run it again, instead of starting a new
> copy?  Well through the magic of DCOP I have made available a very small
> general solution for doing this with a subclass of KApplication, which I
> have called KUniqueApplication.
> 
> To use this, you only have to change from using KApplication to
> KUniqueAppilcation in your main() function, and override ONE virtual
> function, newInstance(QValueList<QCString> params).  The argument is a
> bundled up list of parameters that were passed when the second instance
> was requested, if any.  It will have at least the application name, i.e.
> argv[0].  Be aware that this list has already been processed through the
> QApplication parameter munging.
> 
> In this method, either pass on arguments to your GUI about what should
> happen, like xmms does, or like kdehelp, open a new window and then pass
> it an (optional) URL or filename that you get from the params list.
> 
> That's all you should have to do.  Try it.  Suggestions and discussion are
> welcome.

Excellent work Preston!

Bye
Torben

> ---
>   Preston Brown                                    Systems Engineer
>   pbrown@redhat.com                                Red Hat, Inc. 
> 
>