QML & Array of Objects to QML side

[dheerendra]

Hi

I have array of Objects in C++ side. E.g QList<Fruits>. Assume that number of fruits are 5. I would like to display the name of fruit using five text elements.

1. I can expose these objects using Model. If Expose the fruit list as model, I have to use them View.
2. If I expose through QVariantList, any updates to fruit list will not be updated updated internally. Issues with this approach is that need to send the full list again.

Is there way I can use the model, still update the data with model internally and use it without Views ?

Please note that I'm experimenting with different options. If you have any inputs please suggest.

[Eeli K]

@dheerendra said in QML & Array of Objects to QML side:

Is there way I can use the model, still update the data with model internally and use it without Views ?

I didn't understand, can you rephrase the question? What do you mean by "update the data with model internally"? What is using without Views?

[dheerendra]

@Eeli-K
Thank you responding to my question. I would like to have model in C++. Assume I have 5 elements in model and it has role called 'name'. I would like to display the name with simple 5 text elements instead of using ListView or GridView etc. Also I would like the text elements to updated whenever the model changes.

Hope it clarifies.

[Eeli K]

@dheerendra I think you still need something which uses a model automatically or you have to catch the signals from C++ and update the visual elements manually. Strictly speaking a Repeater is not a View but it's updated automatically:

import QtQuick 2.7
import QtQuick.Controls 2.2

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    ListModel {
        id: lm
        ListElement {}
        ListElement {}
    }

    Row {
          Repeater {
              model: lm
              Button {
                  text: lm.count
                  onClicked: lm.append({})
              }
          }
      }
}

[liubbc]

I think Signal & Slot may be helpful for update data

[DBoosalis]

@dheerendra

Do you really need a model in C++ to do this. Here is how I create a row of tabs dynamically in QML:

 TabView {
        id:wayPointTabView

        anchors.top:titleArea.bottom
        anchors.topMargin:5
        anchors.left:parent.left
        anchors.right:parent.right
        clip:true
        height:325
        tabPosition:Qt.BottomEdge
        Component.onCompleted:{
            var i = controller.getNumOfMarkerTypes();
            for (var j = 0; j< i; j++) {
                var tab = addTab(controller.getMarkerTypeString(j),waypointIconTabView)
                tab.active = true;
                console.log("\t\t>>>>>>Tab", tab.progress, tab.item)
                tab.item.markerType = j;
                //    tab.loaded.connect(wayPointTabView.xxx)
                //      tab.loaded.connect(function() { tab.item.markerType = j; })
                tab.item.focus = true
            }
            currentIndex = 1;
        }
    }

Now controller is a c++ class.  It has the two methods defined as:
(Controller.h)

Q_INVOKABLE int getNumOfMarkerTypes();
Q_INVOKABLE QString getMarkerTypeString(int);

[Eeli K]

@DBoosalis That will not be updated automatically, which dheerendra explicitly wanted.