How to insert child into QTreeWidget hierarchy?

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0

Consider I have QTreeWidget with following items hierarchy:

top_item
  |--child

Every item has assigned with setItemWidget() widget. I need to insert another child between my first two elements like this :

top_item
  |--another_child
     |--child

I trying to do that with following code:

QTreeWidgetItem* top_item = new QTreeWidgetItem;
ui->treeWidget->addTopLevelItem(top_item);
QTreeWidgetItem* child_item = new QTreeWidgetItem;
top_item->addChild(child_item);

ui->treeWidget->setItemWidget(top_item, 0, new QPushButton);
ui->treeWidget->setItemWidget(child_item, 0, new QPushButton);

// ---- let's insert another child ----
auto last_children = top_item->takeChildren();

QTreeWidgetItem* another_child_item = new QTreeWidgetItem;
top_item->insertChild(0, another_child_item);
ui->treeWidget->setItemWidget(another_child_item, 0, new QPushButton);

another_child_item->addChildren(last_children);

It works fine except one moment — it lost assigned widgets. I've tried to take and save the widgets before taking children with

QWidget* widget_from_child_item = ui->treeWidget->itemWidget(child_item, 0);
ui->treeWidget->removeItemWidget(child_item, 0);

but after calling takeChildren() all assigned widgets have been deleted and app is crashing after reassigning the widgets with setItemWidget().

What is my mistake?

edited 28 secs ago

Jenz

4,835

asked 1 min ago

MaxNes

6

How to insert child into QTreeWidget hierarchy?