call listmodel append within go source

[Gerald Stan]

Hello,

I use a listmodel and want to call the method append in the defined method named as Loaded:

http://qt-project.org/doc/qt-5/qml-qtqml-models-listmodel.html#append-method

qml file:

ListModel {

        id: largeModel

        Component.onCompleted: {

            ctrl.loaded(largeModel)

        }

    }

}

go app:

func (ctrl *Control) Loaded(obj qml.Object) {

  fmt.Println("onCompleted() called")

  fmt.Println(obj.Int("count"))

  obj.Call("append", "\"name\":\"Person \"+0 , \"age\": 20, \"gender\": \"Male\"")

}

here the output:

go run tableview.go 

onCompleted() called

0

fatal error: unexpected signal during runtime execution

[signal 0xb code=0x1 addr=0x400000001 pc=0x555f4a1]

whats the right way to call it?

Thanks,

-Gerald

[Gerald Stan]

any comment on this?

[Andrew Jackman]

I think this may be what you're looking for:

https://groups.google.com/d/msg/go-qml/JXPnjD-HH8Y/XM1sQBe_ZyEJ

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[Gerald Stan]

ok, seems a similar issue.... whats the right way to call append in this case?

[Gerald Stan]

the interesting thing is i can call the method clear (http://qt-project.org/doc/qt-5/qml-qtqml-models-listmodel.html#clear-method) without any issues:

obj.Call("clear")

[Gerald Stan]

i solved this in the following way:

i simply do a json encoding on the go side as well as json decoding on the javascript side...

i extended the qml file with a js function:

function myAppend(json) {

          largeModel.append(JSON.parse(json))

}

i extended the go source with:

type tableEntry struct {

    Name string `json:"name"`

    Age string `json:"age"`

    Gender string `json:"gender"`

}

func (ctrl *Control) Loaded(obj qml.Object) {

  fmt.Println("onCompleted() called")

  fmt.Println(obj.Int("count")) // count should be 0 at the beginning, since the table is empty

  for i := 0; i < 100; i++ {

    m := tableEntry{"Person " + intToString(i), "10", "Male"}

    jsonData, err := json.Marshal(m)

    if err != nil {

      fmt.Println("json error")

    }

    obj.Call("myAppend", string(jsonData))

  }

  fmt.Println(obj.Int("count")) // count should be 100 after we insert 100 elements

}

please give me some feedback...

are there plans to fix this within golang qml?

[Gustavo Niemeyer]

Hi Gerald,

This is the same issue described here:

https://github.com/go-qml/qml/issues/90

It will be addressed.

--

gustavo @ http://niemeyer.net

--

gustavo @ http://niemeyer.net

[Jakob Maier]

Is there already a solution for this Issue?