Pass Qml object in signal

  • Hi.
    I created a c++ QObject based class and I use that in qml just fine.
    I want to use object of that type in signal parameter.
    I've done the following:

    // Sender.qml
    signal sigName(var obj) // signal definition
    CppBasedClass { id: cls } // create object of that type
    function func() {
       cls.property1 = ... // fill object
       sigName(cls) // emit signal
    // Receiver.qml
    CppBasedClass { id: recv }
    Connections {
       onSigName: {
          recv = obj
          console.log(obj.property1) // works, prints property1 value
          console.log(recv.property1) // <-- does not work, prints nothing

    CppBasedClass have many properties and I need autocomplete feature. obj does not have any autocomplete, but recv does.
    How can I achive this?

  • Temporarily solved the prblem with this function:

    // equivalent to: obj1 = obj2
        function assign(obj1, obj2) {
            for(var prop in obj2)
                if(obj2.hasOwnProperty(prop) && typeof obj2[prop] !== 'function')
                    obj1[prop] = obj2[prop]

    because obj1 is of type obj2, there is no problem with this approach.

    BUT main question remains unanswered. Why assignment does not work?

Log in to reply

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.