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qdbus调用方法时相当简单，但是可以用它连接到信号吗？签名：
qdbus
signal void org.kde.kwin.Scripting.printError(QString text)
从#dbus开始irc.freenode.org：
#dbus
irc.freenode.org
thiago | the command-line utility can only send calls thiago | use dbus-monitor for that