Problem with c++ to qml emiting

[Adamas]

Hi! I have some code. But I have problems with It. Cause I can't append to ListView something. When app start and starting changer() I have call of function, which emit signal to qml, but in qml nothing happens.

In list view I have some pic+text+tooltip.

main.cpp
 qmlRegisterType<changer>("Changer",1,0,"Changer");


changer.cpp

bool changer::add(std::string uid, QString name, QString place, QString type){
    place_uid.push_back(uid);

    emit adding(name,"0","good",place);
      qDebug() <<"pew-pew";
    return 1;
    }
 signals:
        void adding(QString idfromapp,QString data, QString sig, QString place);


main.qml
import Changer 1.0

 Changer{
   id: changeit

   }
   Connections {
       target: changeit
       onUpdate: {
            update(idbutt,idfromapp,data,sig,place)}
       onUpdateMeasure: {
           updateMeasure(idbutt,data,sig)
       }
       onRemove: {
           remove(idbutt)
       }
       onAdding: {

           add_component(idfromapp,data,sig,place)

       }
    }

function add_component(idfromapp,data,sig,place){
       listMod.append({"attributes": [{"state":sig},{"textid":idfromapp},{"place":place},{"measure":data}]})
}

Can somebody e3xplain what I doing wrong?

[Adamas]

At least I solved It. The problem was in ListView. I need just write anchors.fill : parent, and now all work!

[KroMignon]

@Adamas Why do you use Connections ?

It's more readable to declare signals connection direct on instance:

import Changer 1.0

Changer{
  id: changeit

  onUpdate: {
    update(idbutt,idfromapp,data,sig,place)
  }
  onUpdateMeasure: {
    updateMeasure(idbutt,data,sig)
  }
  onRemove: {
    remove(idbutt)
  }
  onAdding: {
    add_component(idfromapp,data,sig,place)
  }
}

function add_component(idfromapp,data,sig,place){
  listMod.append({"attributes": [{"state":sig},{"textid":idfromapp},{"place":place},{"measure":data}]})
}

[Adamas]

At least I solved It. The problem was in ListView. I need just write anchors.fill : parent, and now all work!

[Adamas]

@KroMignon

 listMod.append({"attributes": [{"state":sig},{"textid":idfromapp},{"place":place},{"measure":data}]})

You know, In my struct it doesn't work. In this case it write only default attributes