Where are my QTreeWidgetIcons?

Question

I have a `QTreeWidget` with `QTreeWidgetItem` items, however only the root node is showing its icon: I've been scratching my head on what could turn it off, any hints? ``` ui->folderTree1->setUpdatesEnabled( false ); QTreeWidgetItem* treeRoot1 = new QTreeWidgetItem(ui->folderTree1); treeRoot1->setIcon(0, QIcon(":/icons/black.png")); treeRoot1->setText(0, tr("Root")); treeRoot1->setExpanded(true); addFoldersToTreeView(treeRoot1, ui->filePath1->text(), ui->filePath2->text()); ui->folderTree1->setUpdatesEnabled( true ); } void MainWindow::addFoldersToTreeView(QTreeWidgetItem* currentWidget, QString leftPath, QString rightPath) { qDebug() << "MainWindow::addFoldersToTreeView" << leftPath; QDir dir(leftPath); QDir dir2(rightPath); /* Add the folders */ foreach (QString subDir, dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot)) { QString sImageName = ":/icons/black.png"; QTreeWidgetItem* newItem = new QTreeWidgetItem(currentWidget); qDebug() << "MainWindow::addFoldersToTreeView.sImageName" <…

Accepted Answer

The problem is the line:

```
newItem->setData(0, 1, QVariant(leftPath + QDir::separator() + subDir));
```

The second argument is the item data role, which you specify to 1 (Qt::DecorationRole). The Qt::DecorationRole should be used for data that is rendered as a decoration in the form of an icon, i.e., this line will cause the the icon you specified before to be replaced with a `QVariant` object.

Remove that line or change the item data role to something else.

Where are my QTreeWidgetIcons?

Solution

Problem