Re: [Printing-architecture] REMINDER: Project ideas for the GoogleSummer of Code 2009

[Lars Uebernickel <larsuebernickel@gmx.de>]

On Fri, 2009-02-27 at 16:49 -0300, Till Kamppeter wrote:
> George Liu wrote:
> >> Lars is ... patching the toolkits to get the D-Bus interface in.
> > 
> > 1. Does it mean that the GTK+ Print dialog portion will be moved out of GTK+ library and be build into a utility (stand alone program)?
> 
> The print dialog will stay in GTK+. There will only get the D-Bus 
> interface inserted so that the GTK+ dialog can easily get replaced by 
> another dialog.
> 
> > 2. Does GTK+ tool kit currently depends on D-Bus(libdbus)?
> 
> I don't know. Perhaps it uses D-Bus already for other things.
> 
> > 3. What if there's no D-Bus Daemon on the distribution (Nokia Tablet, which uses Gtk+ tool kit, for example). Any fall-back solutions?
> 
> The D-Bus part will be ptional. You will be able to build GTK+ with and 
> without D-Bus. Or there will be a fallback. If the dialog is called and 
> no dialog gets found via D-Bus one could do a fallback to the native 
> GTK+ dialog.
> 
> > 4. How to register my CPDAPI server application with D-Bus? (Switch from gtk+ print dialog to QT print dialog, for example)
> 
> Here I cannot help. Lars? Can you answer this question?

The CPDAPI server will not run all the time. Instead, it will make use
of D-Bus' service feature, which starts a process when a specific
interface has been requested by a client application. In order to
register such a service, a .service file needs to be put
into /usr/share/dbus-1/services (on ubuntu, this might differ a bit for
other distributions).

In the CPDAPI case, it might look something like this:

  [D-Bus Service]
  Name=com.openprinting.PrintManager
  Exec=/usr/bin/cpd-dialog-gtk

Changing the dialog is simply a matter of changing the 'exec' line.

    Lars