[mpris] [RFC] MPRIS2 Release Candidate

[Alex Merry]

  On 10/08/10 20:15, Ian Monroe wrote:
> These sound like good reasons to never use PropertiesChanged.

Code to send a PropertiesChanged signal in Qt:

QDBusMessage signal = 
QDBusMessage::createSignal("/org/mpris/MediaPlayer/Player", 
"org.freedesktop.DBus.Properties", "PropertiesChanged");
signal << "org.mpris.MediaPlayer2.Player";

QVariantMap changedProps;
changedProps.insert("blah", "foo");
changedProps.insert("jim", 4);
changedProps.insert("rac", true);
signal << changedProps;

QStringList invalidatedProps;
invalidatedProps << "prop1" << "prop2";
signal << invalidatedProps;

QDBusConnection::sessionBus().send(signal);



Code to watch for a PropertiesChanged signal in Qt:

QDBusConnection::sessionBus().connect(
     "org.mpris.mediaplayers.foo",
     "/org/mpris/MediaPlayer/Player",
     "org.freedesktop.DBus.Properties",
     "PropertiesChanged",
     this,
     SLOT(propertiesChanged(QString,QVariantMap,QStringList)));


It works as a stopgap until QDBus is fixed to do this automagically (4.8?).

The only issue is that Qt won't expose this in the introspection data 
for the org.freedesktop.DBus.Properties interface.

Alex