set line between qtreewidget items

Question

I have a QTreeWidget that items append to it dynamically, I want to set lines between them, I have first pictures and I want it to be like the second one, but I don't know how doing it? thank you in advance!

Answer 1

Well you can experiment with stylesheets:

treeWidget->setStyleSheet("QTreeWidget::item { border-bottom: 1px solid black;}");

But I am not sure if can get exactly the look you want. You can also subclass QStyledItemDelegate and provide your own sizeHint() and paint() implementations.

Answer 2

If You need to select items, following works a little better I think:

  QString style = "QTreeWidget::item:!selected "
    "{ "
      "border: 1px solid gainsboro; "
      "border-left: none; "
      "border-top: none; "
    "}"
    "QTreeWidget::item:selected {}";
  allergiesListView->setStyleSheet(style);