QTreeView doesn't change its behaviour for child items even if flags are correctly set

famastefano

Hello,
I have a very simple Model/View with a custom model and a default QTreeView.

My model has 2 levels only:

I have 6 columns:

Type, Name, and Life belong to the top level item
Twin, Work, and Usage belong to the childrens

I need to:

Edit 'Name' and 'Life'
Edit 'Work'
Make anything selectable
Make children be draggable as they will be copied on another widget

I've set the flags like this:

constexpr int TYPE_COL = 0;
constexpr int NAME_COL = 1;
constexpr int LIFE_COL = 2;

constexpr int TWIN_SUBINDEX_COL = 3;
constexpr int TWIN_WORK_COL     = 4;
constexpr int TWIN_USAGE_COL    = 5;

Qt::ItemFlags MyModel::flags(const QModelIndex &index) const
{
    if(!index.isValid())
        return Qt::NoItemFlags;

    int col = index.column();

    if(getType(index.internalPointer()) == AbstractToolItem::ToolType::TOP_LEVEL)
    {
        switch(col)
        {
        case TYPE_COL: return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
        case NAME_COL:
        case LIFE_COL: return Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable;
        }
    }
    else
    {
        switch(col)
        {
        case TWIN_SUBINDEX_COL:
        case TWIN_USAGE_COL: return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
        case TWIN_WORK_COL: return Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable | Qt::ItemNeverHasChildren | Qt::ItemIsDragEnabled;
        }
    }

    return Qt::NoItemFlags;
}

Just in case, MyModel::data(....) returns a QVariant() for "invalid columns":

Column 3, 4, 5 for top level items
Column 0, 1, 2 for childrens

Everything seems to work only for the top level items and I don't know why...
Any ideas?

famastefano

A colleague of mine, that used Qt for years, helped me.
The culprit was (other than me) that I wrongly created the parent of the children.