Dynamic component : component on component

[helenebro]

Hi,
I have an application with the c++ part which provide data to Qml. My data isn't always the same. I want display these data properly on Column.
When I have new data, I add Text component on a Column without problem.
But I want create Column on column to organize my data :

____________________
|  _______         |
| | text  |        |
| |_______|        |
|                  |
|  _______         |
| | text  |        |
| |_______|        |
|                  |
|  ______________  |
| |    _______   | |
| |   | text  |  | |
| |   |_______|  | |
| |    ______    | |
| |   | text |   | |
| |   |______|   | |
| |______________| |
|__________________|

To do this, I want create dynamically component column on the main component.

Item {
    id:previewInfo
    property variant dataCurrentItem: myApp.searchResult.length>0 ? myApp.searchResult[listResult.currentIndex] : ""

    Component {
        id:simpleComponent
        Text{
            wrapMode: Text.WordWrap;
            font.pixelSize: 21;
            font.family: fontAller_Lt.name
            color:cst_COLOR_WHITE;
        }
    }

    Component {
        id: columnComponent
        Column {
            id:myColumn
            width:200; height: 200;
        }
    }

    Column {
        id: mainColumn
        width: parent.width; height:parent.height
        spacing:20
    }

    onDataCurrentItemChanged: {
        for(var i=0; i<mainColumn.children.length; ++i) {
            mainColumn.children[i].destroy()
        }
        if(dataCurrentItem) {
            if(dataCurrentItem.data1) {
                simpleComponent.createObject(mainColumn,{"text":dataCurrentItem.data1});
            }

            if(dataCurrentItem.data2) {
                simpleComponent.createObject(columnComponent,{"text":dataCurrentItem.data2});
                columnComponent.createObject(mainColumn);
            }
        }
    }
}

But it doesn't work and I have the error

QQmlComponent: Created graphical object was not placed in the graphics scene.

[helenebro]

I have found a solution.
I have to create first my object column. Then I can create "children" :

Item {
    id:previewInfo
    property variant dataCurrentItem: myApp.searchResult.length>0 ? myApp.searchResult[listResult.currentIndex] : ""

    Component {
        id:simpleComponent
        Text{
            wrapMode: Text.WordWrap;
            font.pixelSize: 21;
        }
    }

    Component {
        id: columnComponent
        Column {
            id:myColumComposed
            width:200;
            function addText(data){
                if(data) {
                    simpleComponent.createObject(myColumComposed,{"text":data});
                }
            }
        }
    }

    Column {
        id: mainColumn
        width: parent.width; height:parent.height
        spacing:20
    }


    onDataCurrentItemChanged: {
        for(var i=0; i<mainColumn.children.length; ++i) {
            mainColumn.children[i].destroy()
        }

        if(dataCurrentItem) {
            if(dataCurrentItem.data1) {
                simpleComponent.createObject(mainColumn,{"text":data1});
            }
             if(dataCurrentItem.data2) {
                simpleComponent.createObject(mainColumn,{"text":data2});
            }

            var objectColumn = columnComponent.createObject(mainColumn);
            objectColumn.addText("data3");
            objectColumn.addText("data4");
        }
    }
}