Well, that's the way I did it first, too. You can also declare your signal&slot as Q_PROPERTY() for your C++ QObject. If you define the READ and WRITE and NOTIFY methods for the Q_PROPERTY, you can then treat it as a "normal" object in QML. So write in C++ class declaration something like

Qt Code: 
  1. Q_PROPERTY(QString numberToDial READ getNumberToDial WRITE dialSlot NOTIFY dialSlignal)
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then you can write in QML:

Qt Code: 
  1. myDialpad.numberToDial = "12345"
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