c++qt5qstandarditemmodelqmodelindexqstandarditem

How to iterate through a QStandardItemModel completely?


I have a QStandardItemModel, which I display in q QTreeView. Works fine.

To highlight relevant rows I want to highlight some of them: Therefore I have a QStringList with the names of the QStandItem* s to be highlighted.

QStringList namesToBeHighlighted = getNames();

QModelIndex in = myModel->index(0, 0);

if ( in.isValid() ) {

    for (int curIndex = 0; curIndex < myModel->rowCount(in); ++curIndex) {

        QModelIndex si = myModel->index(curIndex, 0, in);
        QStandardItem *curItem = myModel->itemFromIndex(si);

        if (curItem) {
           QString curItemName = curItem->text();

           if ( namesToBeHighlighted.contains(curItem->text()) ) {
               curItem->setFont(highlightFont);
           }
           else curItem->setFont(unHighlightFont);
        }
    }
}

My Model has following structure:
Level_1
+--> Level_11
+--> Level_12
+--> Level_13
Level_2
+--> Level_21
+--> Level_22
+--> Level_23
...

Here, it iterates trough Levels 11, 12 and 13 then it stops.


Solution

  • I hope it helps you:

    void forEach(QAbstractItemModel* model, QModelIndex parent = QModelIndex()) {
        for(int r = 0; r < model->rowCount(parent); ++r) {
            QModelIndex index = model->index(r, 0, parent);
            QVariant name = model->data(index);
            qDebug() << name;
            // here is your applicable code
            if( model->hasChildren(index) ) {
                forEach(model, index);
            }
        }
    }
    
    QStandardItemModel model;
        QStandardItem* parentItem = model.invisibleRootItem();
        for (int i = 0; i < 4; ++i) {
            QStandardItem *item = new QStandardItem(QString("item %0").arg(i));
            for (int j = 0; j < 5; ++j) {
                item->appendRow(new QStandardItem(QString("item %0%1").arg(i).arg(j)));
            }
            parentItem->appendRow(item);
            parentItem = item;
        }
    forEach(&model);