Qt - Expand QTreeView on single click?

Question

While double-clicking the text of a QTreeView expands the children, a single-click does not. The icon defined in the CSS (and placed to left of text) expands the children on a single-click, though. How do I make it so a single-click (or touch event) of the text will expand the children? ``` bookTreeView->setModel(standardModel); bookTreeView->setEditTriggers(QAbstractItemView::NoEditTriggers); bookTreeView->setWordWrap(true); bookTreeView->sizeHint(); //bookTreeView->mousePressEvent(QMouseEvent()); bookTreeView->setTextElideMode(Qt::ElideNone); bookTreeView->setExpandsOnDoubleClick(true); bookTreeView->setUniformRowHeights(true); bookTreeView->setHeaderHidden(true); bookTreeView->setStyleSheet("QTreeView { font-size: 27px; show-decoration-selected: 0; } QTreeView::branch:has-siblings:!adjoins-item { border-image: none; } QTreeView::branch:has-siblings:adjoins-item { border-image: none; } QTreeView::branch:!has-children:!has-siblings:adjoins-item { border-image: none;} QTreeView::branc…

Accepted Answer

Something along the lines of

```
QObject::connect(
    tree, SIGNAL(clicked(const QModelIndex &)), 
    tree, SLOT(expand(const QModelIndex &))
);
```

The `clicked`signal might not do what you want. You can also have a look at the `currentChanged` signal, which might be what you want. I've never used Qt in a mobile context :)

Qt - Expand QTreeView on single click?

Solution

Problem