QtRuby D-BUS Hello World

I've just got my first Ruby D-BUS app pretty much working, it starts up, outputs convincing looking messages, and then crashes kdbus. I only started yesterday and so it hasn't taken long to get the D-BUS api pretty much wrapped. I still need to do some work on the QDBusAbstractInterface::call() method, as it uses C++ templates and doesn't translate easily into Ruby.

I needed to add a Ruby equivalent of Q_CLASSINFO() to create suitable info in the Qt::MetaObject so that a class could be labelled as a D-BUS interface. Then I added to QtDBus headers to the ones used to generate the Smoke library, along with the D-BUS libs and that's all there was to it. Here is what the 'hello world' app looks like:

slots 'mySlot(QString)'
            
def initialize(parent, name)
    super
    Qt::DBus.sessionBus().registerObject("/", self, Qt::DBusConnection::ExportSlots)
end

def mySlot(greeting)
    puts "greeting: #{greeting}"
end

a = Qt::Application.new(ARGV) slottest = MyWidget.new('Hello dbus', nil) slottest.show a.exec

Or with xml introspection data:

slots 'mySlot(QString)'
            
def initialize(parent, name)
    super
    Qt::DBus.sessionBus().registerObject("/", self, Qt::DBusConnection::ExportSlots)
end

def mySlot(greeting)
    puts "greeting: #{greeting}"
end

a = Qt::Application.new(ARGV) slottest = MyWidget.new('Hello dbus', nil) slottest.show a.exec

(Edited 7/6/2006, the code now works with kdbus, and the slot can be invoked). And that's it! You just add a q_classinfo('D-Bus Interface', 'an interface name') to your class, define any slots and signals you need, and they are automatically turned into D-BUS slots by the Qt::DBus.sessionBus.registerObject() call.

I need to find more about how kdbus works, and whether the one I apt-get installed from Dapper works with the dbus-1 libs I linked QtRuby against. I understand that I can just add signals to the class above, and they will be forwarded to the bus, although I haven't found out how you connect to a D-BUS signal yet..