QML TreeView expand() method not working

buckTarle

Hi there !

I am currently using a QML TreeView based on a c++ model that is built when the user select some data to be showed.
It is working correctly and I can expand or collapse it myself by clicking on the button.

I would like it to be fully expanded every time it is charged but I can't get the expand() method to work.
I tried with this line but without success :

myTreeView.expand(treeView.rooIndex);

QUESTION : Do I need to implement something in my cpp model for it to work ? Or maybe I just missed something else ?

ps : It might be related to the TreeModel::index() method of the model which I was not sure how to implement.

nx7z

Hi Buck,

I was facing the same issue. I "solved" it by using this loop:

function expandAll() {
    for(var i=0; i < myModel.rowCount(); i++) {
        var index = myModel.index(i,0)
        if(!myTreeView.isExpanded(index)) {
            myTreeView.expand(index)
        }
    }
}

But it's delicate, because you can't call it while filling the model. Only after it is done. Otherwise the TreeView won't work/look properly. For me TreeView is only a have done Control. I'm missing an attribute in TreeView "alwaysExpanded" or something.

Hope this helps!
Best,
Nexu