Am Freitag, 8. Januar 2010 schrieb Michael Zanetti:
> On Friday 08 January 2010 12:52:14 Christian Rüb wrote:
> > Hi,
> >
> > I am about to write my own little GPS application in Qt and try to connect
> > to FixStatusChanged signal from Gypsy but have the following problem
> >
> > Code snippet:
> > ...
> > deviceInterface = new QDBusInterface("org.freedesktop.Gypsy",
> > "/org/freedesktop/Gypsy/default", "org.freedesktop.Gypsy.Device",
> > QDBusConnection::systemBus(),this); ...
> > connect(deviceInterface, SIGNAL(FixStatusChanged(int)), this,
> > SIGNAL(fixChanged(int)));
> >
>
>
> try this:
> ...
> deviceInterface = new QDBusInterface("org.freedesktop.Gypsy", "/default",
> "org.freedesktop.Gypsy.Device", QDBusConnection::systemBus(),this);
>
> Qt doesn't need the full path for the node again.
>
>
> Here you find some very useful QtDBus examples:
> http://techbase.kde.org/Development/Tutorials#D-Bus
>
> Not sure if you know about "qdbusviewer". It comes with your Qt4 installation
> and helps you a lot debugging and understanding DBus.
>
> Hope this helps.
> Michael
Thanks Michael,
tried your suggestion:
deviceInterface = new QDBusInterface("org.freedesktop.Gypsy",
"/default", "org.freedesktop.Gypsy.Device", QDBusConnection::systemBus(),this);
connect(deviceInterface, SIGNAL(FixStatusChanged(int)), this,
SIGNAL(fixChanged(int)));
qDebug() << "testcall" << deviceInterface->call("GetFixStatus");
the result was the same :(
Object::connect: No such signal
org::freedesktop::Gypsy::Device::FixStatusChanged(int)
I already came across the page you mentioned - that's where I got connect to a
dbus signal from...
Yes, I know qdbusviewer, I tried it on my Freerunner but it does not dispaly
anything but the service names :(
same for qdbus
Calling a method on the above interface also gives an error:
testcall QDBusMessage(type=Error, service="", error
name="org.freedesktop.DBus.Error.UnknownMethod", error message="Method
"GetFixStatus" with signature "" on interface "org.freedesktop.Gypsy.Device"
doesn't exist
", signature="", contents=([]) )
trying with
deviceInterface = new QDBusInterface("org.freedesktop.Gypsy",
"/org/freedesktop/Gypsy", "org.freedesktop.Gypsy.Device",
QDBusConnection::systemBus(),this);
connect(deviceInterface, SIGNAL(FixStatusChanged(int)), this,
SIGNAL(fixChanged(int)));
qDebug() << "testcall" << deviceInterface->call("GetFixStatus");
I get:
Object::connect: No such signal
org::freedesktop::Gypsy::Device::FixStatusChanged(int)
testcall QDBusMessage(type=MethodReturn, service=":1.15", signature="i",
contents=(1) )
So at least the function call works here - but not the signal.
Any ideas?
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